@@sandman9601 Except if it was very rare stuff. But yeah, a working Amiga 500 and Master System, both pretty common, only make for an interesting video if you're going to do some wild modding to them.
It was a way of a brand like Panasonic to sell a product at (likely) a lower price point, but not dilute their brand cheapen it, and lower the price they could sell a REAL Panasonic TV. It's not unlike all the products you see at Trader Joe's that are actually well known brands, just slightly cheaper versions of it. I don't think we see it today because electronics are al just commodities these days, and there's not much margin to shave away and sell at a lower price.
You sure do hate RF shields. They provide structural support and have taken a dent instead of the motherboard for me once in the past. So I keep them on.
On the A500, check JP2 and JP7a, the could be configured to use the expansion ram (A501) as chip ram, this would give a green screen if the A501 is not fitted.
Yes...or agnus needs reseating. I doubt someone sent the system with all those goodies if that was the issue. Not to say they didn't but I'd be surprised ?
@@GrahamTinkers Not sure what board I have in my A500, but I did convert it to an a500+ by cuting and bridging a few jumpers and putting an A500+ agnus in it and 512k or 1.5mb cheese. you have to blank a pin on the new agnus with a bit of tape or cut a track. It was a couple of years ago, so my memory is a bit vauge. Works fine, even on 1.3. Haven't burned a 2.04 for it, but tested with a 2.04 from my orignial A500+. Can't rember, aint the a500+ agnus a fatagnus? Theres a guide online somewhere. I can dig it out if anyone needs it. Also lerned that them quad pack chips don't have pin one on the corner too, I had to look that up as the pin you had to insulate didn't count out right and thought the guide was wrong, but sure enough, it was right. Not a painfull mod/upgrade to do. I'll put a rom switcher in it when I get around to it. I remeber my board had a big PCB hole cutout under the agnus so I didn't need the tool to get it out, that might give a clue to the rev. I would look but it's in the cuboard behind santas cache. I do have the old agnus at hand though, MOS 8371 datecode i think 4588 dunno what the 21 is batch maybe. Thinking back on it I think Adrian done a video on the conversion unless I'm thinking of the multirom for the C64, that BTW works awesome Adrian. I used a switch though.
I don't know why, but center negative 9VDC is a common thing in 70s and early 80s hardware, but not if they're any other voltage. This noble tradition lives on in stage audio gear, which is all 9VDC, center negative. Always give 9V wallwarts and bricks a thorough double-check when you aren't 100% sure they match the hardware. Decoding channel 2/3/4 and outputting composite is a good use for a mechanically dead VCR. That might be good enough for a screen capture if you get the game console working.
Those old vaccuum tube TVs take a LONG time to warm up and give an image, around a minute or more as I remember from my childhood, I used to watch on my father's old Sanyo B/W portable 14" TV. I used to watch the tubes in the back warming up and starting to glow through the heat vents and I would always know when the picture was going to start coming up on the screen. Ah man, back to Elementary school days.
@@xredhead7135x The worst CRT warmup I've seen is an old arcade monitor which takes about a whole minute. But that's a heavily used monitor with enough wear the burn-in is super obvious. If the set were working properly there would most likely be noise from the audio circuitry. I'm guessing the CRT is warmed up but a boost voltage derived from the flyback is not coming up.
@@eDoc2020 as a kid, I had an old black and white small TV made in 1980 which when left alone for a while would take 3 to 5 minutes to brighten up.The first 2 to show light in a lit environment. Yes, you're right about audio straight away if present or static, but no audio is not indicative of immediate trouble. This would've been late 90's that I used that old TV.
18:54 Sega Master System (SMS) does use a "compatible" Atari joystick. You can use the Sega controller in an Atari 2600, Atari 8bit/ST, Commodore Vic/64, or Amiga, it's just the extra button will not do anything, I did test this back in the 80s. Conversely (but never tested) a standard Atari joystick will work in the SMS but since it lacks that 2nd button you'll have limited use or not work at all. Also the SMS controller only has 2 buttons, there is no start/select button like the NES controllers did.
The Master System came to the US around the same time as the NES. I got one for Christmas when my parents couldn't get their hands on a Nintendo. It definitely had better graphics, but like you said, the game library wasn't there. The masked ROM contains Hang On and/or Outrun, which were fun enough for preteen me. I want to say the flat Card ROM was identical to the TurboGrafx 16 / PC Engine, and had an extremely limited address bus / memory space. The cartridge ROMs were much more common and had better titles. Great Baseball has an umpire with C64 Ghostbusters quality audio samples. LOL, used to sing "do re me" "so la te DOH.
I’ve repaired several Master Systems over the last couple years. The first thing you always want to do is reflow the solder joints for the power switch. They seem to be prone to cracking so it’s always good practice to freshen them up. If that doesn’t get it working the next step is to check out the 7805. I’ve had to replace at least one that was blown due to someone putting an NES adapter in there. The Sega Genesis 2’s solder points for the power barrel are also known to go bad, so I usually freshen those up in the Master System as well. Maybe not needed, but certainly can’t hurt.
Hello back. I am in Bremerton right next to Port Orchard in Kitsap County Washington State. I have relatives in Oregon so I have been down there a lot.
genesis/megadrive controller works fine with mastersystem. DIN connector is very easy to get composite (and indeed RGB) out. Was very popular here in UK as a budget option to the megadrive. (The NES didn't do well here) Card port barely used. Can get very cheap Chinese everdrive clones. Usually mastersystem has a built in game on the rom - you can tell by model number :) Hope you enjoy it - it is worth repairing :) Try sonic 1, 2 and chaos
As for the JC Penney TV, it reminds me that I'm slowly working on integrating my 3rd C64 DTV inside of a Goodmans GTV 9100 6" portable television (also sold as a TMK 510CP in NTSC land) with the idea of making it a kind-of "compact SX-64", but with the additional option of video input, using the TV inputs internally for the DTV, retaining the rear switch between TV & Video input, cos why not... :D
The 68010 basically fixed the only fundamental error the 68000 had. Namely reading the SR register was unprivileged in the 68000 and became privileged in the 68010. This change allowed the 68010 to be virtualizable. The MOVE from CCR was added to compensate for the change, and the VBR register was added to allow the 1KB exception vector table to be relocated. In contrast, the x86 architecture wasn't fully virtualizable until 2005.
I had a big boombox from JCPenney, and it was awesome even though I live in Europe. I have converted the whole thing into an European boom box. It had an awesome bass, and treble, and it was super reliable and it had almost every part made out of metal instead of crappy plastic.
For the Master System, the card games are rare, but could hold a small game ROM and be sold at a lower price, the issue was that the maximum ROM size(32kb after a quick Google) was so small it was practically useless. You can use a 2 button C64 joystick(such as the one included with the C64C/Robocop 2 cartridge bundle and the C64GS) or a Sega Mega Drive controller(B and C will work as 1 and 2 respectively) to use it.
The Sega Master System was the North American version of the Sega Mark-III. It could display 32 simultaneous colors. en.m.wikipedia.org/wiki/Master_System
Did you try the Amiga with the extended memory card in it? They may have modified the motherboard to use that trap door ram as chip ram (by default I think it's "slow" ram), and now you're getting memory errors because it actually needs that trap door ram.
even with a modded motherboard for 1MB chip RAM, a working board without the expansion RAM won't green screen and you will get a kickstart screen with just 512k chip. Likely causes of green screen is bad CPU socket and/or Agnus needs reseating and/or bad chip RAM
@@iamdkk I'd replace the socket, unless I planned to reinstall the accelerator permanently and didn't want to wreck another socket. Reseating Agnus should be tried because it doesn't cost anything. And it already sounds like he's leaning toward putting the full 1 MB on board, if he has to replace chips anyhow. Might as well just socket all eight spots.
Re; using genesis controllers on the Master System. I recall back in the day being able to use one in a pinch, but there might be a compatibility issue with select games that I read on the internet. I think it was mentioned snipping or removing a grey wire to fix that issue. I never had to resort to that when I was a kid though.
I think you will be surprised by the master system when you get it working. The sound is much better than the NES and it is capable of so much more. Especially in racing games
I hope the Logica ROM will help you fix this poor A500, Adrian. I got the idea from one of GadgetUK164's videos and mailed the decoded ROM image to you a while ago. I would replace the first DRAM chip as the red flashes indicatie it cannot allocate 70k of continuous chipram as that's all it needs to run IIRC...With 128k of working DRAM it should boot and reveal any other faulty DRAM chips. If it doesn't it could be a bad IC in the data path or a bad Agnus or Agnus socket. If you get this ROM to boot it should even point out the socket numbers which is a very nice feature especially on old A2000 that have 32 DRAM ICs! The ROM helped me save quite a few A2000s as well that had bad chip RAM and even one that had an interrupt issue which Logica pointed out. I saved me a lot of time scoping out those giant A2000 boards, thats for sure! Luckily there are only four of them on this one but those Siemens and Fujitsu chips are a bit of a disaster on the A500. They all seem to fail lately! I've seen dozens of Amigas with bad Siemens chips.. Must be because of faulty PSUs, just like the faulty Micron DRAM ICs on C64s because on the A2000s they seem to last quite a bit longer..
Sega MS does have built in games. Which games you got I think depended on the console. Mine came with Hang On and Safari Hunt (I still have the light phaser.) It's compatible with the same AV pinout as the original Genesis. I also distinctly remember running it on the same 12v adapter that the Genesis used.
I just beat Phantasy Star on MiSTer and Pocket (the save is portable) Frank Cifaldi's SMS Power! has an amazing rom hack that restores FM sound and has a better translation/better text fields. So so so worth playing (I'd crank XP to 4x and halve encounter rate - it's ridiculously slow going otherwise and it doesn't make battles easier, just less frequent).
That's a Master System 1, they dropped the card slot thing for the Master System 2, Also, a Standard Amiga/Commadore controller/joystick will work with the Master System, It only had a D-Pad and, Button's 1 and 2.... I used to use my Master System controller on my Amiga 500 all the time, and my 'Micro Bug' joystick on the master system when I had a 2nd player :) Oh, and did you notice the JC Penny TV said 15v 5w, while the Panasonic, said 12v 4.5w?
Adrian, you should see if you can remove that TV antenna easily. I'm betting that it is a standard 90 degree telescoping antenna with that black plastic being a shroud just for style that locks it in place. If that is the case then a replacement antenna should be easy enough to source. Just a thought when I saw both units side by side.
You've inspired me to (potentially) dig two interesting little beasts out of the basement and get them running... First, I have a Commodore 128D, the one in the metal case with integrated floppy drive and cabled keyboard, that had every other column of keys fail to register last time I used it. Second one, and I *think* it's down there but it may be in storage, is an Atari Mega ST2 that I have no accessories for at all... but I do have a Commodore 15khz monitor down there somewhere too so at least I should be able to rig up a video cable, if that's necessary. There's an Amiga 2000 with an upgrade board around here somewhere too that I haven't seen in years, got it to boot and... it was a bit unreliable. Space was needed, stuff got stored, time flew, and there's a cache of goodies in an outbuilding on my old family property that I'm ashamed to admit hasn't been opened in probably 20 years and now I'm kind of afraid to see what became of a TRS-80 model III, DEC rainbow, pile of Sun 3 series equipment, heath/zenith Z80, etc. It might be time to suck it up and pay for a second climate-controlled storage unit and move it already.
SMS was part of that ol' ColecoVision/MSX/Etc chipset. I wonder what company put those chips together in that combination for the first time and sold it around.
In Ireland, we know about JC Penney, because it blocked one of our native lower-cost department stores spreading because it was called Penneys independently of the US chain. So, outside of Ireland, Penneys is known as 'Primark'. It's basically the Aldi/Lidl of clothes in Europe: better quality than the price, but still a bit crap. Great in a pinch though, and half of Europe wears stuff they make at this point.
Hi Adrian - When you get to the SEGA Master System repair, we had one growing up and if memory serves, there was a built in game that you could play without any cartridge installed. I could be wrong, it has been a long time. lol Love your videos. Keep up the great work!
The “PDS” slot is a Zorro bus slot. Also, I think the RAM expansion just expands chip RAM, though other types will add Slow or Fast RAM. I think only Zorro supports Fast RAM, but not sure about Slow. I have an A500 I bought off eBay a few years ago, but haven’t checked it out. I was an Atari ST guy back then. Oh, and M&Ms > Smarties ;-)
The Sega Master System was the first console I had. Mine came with built in Safari Hunt and Hang On, which I played the hell out of! Before the SMS all my gaming at home had been ZX Spectrum based. Loved the SMS, and just didn't get the appeal of my friends NES's
I believe the Sega SG-1000 came out the same day as the Nintendo Famicom and was Japan only. I believe the Master System is an update of the SG-1000 and is backwards compatible.
The Sega SG-1000 which was close enough to the ColecoVision for the Bit Corporation Dina to be simultaneously a clone of both systems came out the same exact day as the Famicom, iirc.
Many a Master System has a fuse that's blown just like on the Sega CD. The fuse looks like a resistor, check that before the VR. Also the Master System has some really great large games and there was an expansion that adds a Yamaha FM synth sound and many games supported FM even though the expansion was never released in the USA there's kits to add FM sound to the USA version
Pretty sure that you can use a standard Atari controller on the Master System. By the way, it's a derivative of a series of consoles Sega only released in Japan - the SG-1000, SC-3000, and the Master System is the international version of the Sega Mark III
Considering a Master System controller works as a 2 button C64 joystick(Robocop 2 is the only game I have that supports it), I assume a 2 button C64 stick should work fine. A Mega Drive pad would also work for Robocop 2, with B being shoot and C being jump, so you could probably use one of those, too.
@@fattomandeibu If I remember correctly, there's one button you shouldn't ever push when you use it in a C64 because it sends voltage somewhere that destroys a chip.
@@gmirwin This joystick was included with my C64C Robocop 2 pack as well as the C64GS. It wasn't made by Commodore, but it was their official 2 button stick.
We have stores that have their own brands. Amstrad was never a house brand but were cheap (they're now Sky TV's STB manufacturing arm) but Dixons had Matsui and Currys had Saisho. Even now we have house brands. A lot of them are long dormant brands that used to be manufacturers in their own right. Bush and Alba are Argos home brands now.
The A500 keyboard is a dual membrane model by Samsung. The membranes are not available like the mitsumi ones are (at least not that I can find) but they do seem to be reasonably reliable.
Hey Adrian! Been awhile since we met at VCF Midwest. Green can be a few things (databus) but in my experience, yeah probably bad RAM. The 536 is an amazing expansion! I have fixed many 500s with green screens, 99% ram.
I probably should say, RESEAT AGNUS FIRST. I've fixed plenty that way too, the above assumes this failed. This note is for others not Adrian, he'd already try that.
I wondered if the Panasonic is a later styling refresh as opposed to the JCPenney's. It just looks more eighties if not nineties, while the latter looks older. But then you said the manufacturing dates were just the opposite. Weird. Maybe they deliberately made it look last decade to segment the market, as it was going into JCPenney's
The 68010 requires a program called DeciGel to bypass one of the updated instructions in the CPU. There were 3 types of keyboards released for the A500. And the green screen includes other issues than just bad chip ram. The Logical ROM is available on the AmigaForever CD/download.
Master system should have a built in game ( which game varied by year). A standard genesis controller SHOULD work. Works with most games at least, but not all. If you decide to burn a game, sonic 2 for the master system is actually really good and a different sort of game than the one for genesis.
@@tanithis I think Snail Maze was hidden in all SMS consoles. It was the default built-in for the first ones on the market, but after that it was a hidden "easter egg" in later consoles that had other games. I'm pretty sure mine had it, but it's hard to remember now. I haven't had my Master System in more than 20 years, sadly.
Adrian, you forgot to note that the CPU socket was loose in the Amiga 500. It may not be the error you encountered but it could be enough to stop the Terrible Fire from working. The Sega Master System is essentially a re-boxed version of the Sega SG-1000 Mk III (released in 1985, Japan only with earlier marks dating back to 1983) with a slightly different cartridge connector. It is backward compatible but you would need and adaptor to plug in the older cartridges. The version I have in the UK has 'Alex the kidd in Miracle World' as a built in title that is accessed without a cartridge in the slot. The Master System was not very successful in the USA and Japan due to those markets being saturated by the NES and Atari machines but did quite well in Brazil, South Korea, Australia the UK and the European market. There are 312 games available for the Master System.
That's always a problem when putting those rounded type pin headers into the double wipe sockets. Over time the big round pins will make the connection so loose in the socket that everything you install afterwards will have a bad connection.
The Master System wasn't slightly superior to the NES in terms of technical specifications. From a pure hardware standpoint it blew the NES out of the water in virtually every column. Arguably, the NES had better sound capabilities, but that's about it. The Master System even had a hybrid 8/16 bit architecture. The entire graphics bus and subsystem was 16 bits. The Master System's graphics capability is far more comparable to the SNES than the NES, just with a reduced color palette and colors on screen. Anyway, you can look into that more yourself. But where the NES had the advantage was with 3rd party developers. In the early days, Sega almost exclusively shunned 3rd party developers in favor of developing everything themselves. By the time they realized this mistake, Nintendo had pretty much gobbled up all the 3rd party developers into contracts and nobody wanted to develop for the Master System.
Chip memory is alternately controlled by the CPU and the Amiga chipset. Slow memory is the same, but the Amiga chipset doesn't intervene and the clock stays empty. The CPU can run synchronously with chip memory or asynchronously. But if the CPU runs asynchronously quickly. then the CPU has to wait until the bus to the chip memory is free. Fast memory is only controlled by the CPU and can have a clock speed at the same speed as the CPU The IDE port is basically an 8 bit data bus and some software ...
The Master System controllers actually don't have a start or select button iirc. At least in the traditional sense. They have the D-pad, 1, and 2. 1 usually served as a press start button before gameplay began, so to pause you'd have to get up and press the pause switch on the console itself. As people have said, the master system was the international version of the Sega Mark-III.
@@jefflavenz7285 to piggy back off this, there is a FM mod created by Tim Worthington which can be installed into that unused slot which will enable Yamaha FM soundtrack hidden on a select few titles. Also I think there is an adapter that can utilize that slot to play Japanese Master System/Mark III games.
The reason why the NES dominated in the USA is because Nintendo's restrictive conditions on releasing games for the NES alongside their lockout chip. When you force your publishers into a two year exclusivity deal, where any rival platform is going to be two years behind your platform, you're either going to die quickly and hard or form a monopoly. In the USA, Nintendo formed a monopoly, in Europe, they were outsold by the Sega Master System which in turn was outsold by the 8 bit microcomputers - the Commodore 64, the Sinclair ZX Spectrum and the Amstrad CPC. Surprisingly, the Atari 8 bits, the MSX, the TRS-80 CoCo (or Dragon for that matter) or the BBC/Acorn Electron weren't as big. Even in the day of the SNES and the MegaDrive, the Amiga was a big competitor over here in ways that DOS or Mac weren't almost entirely down to the affordable prices on the A500, A600, A1200 and the software bundles. Surprisingly the Atari ST wasn't quite as big and the Archimedes, which was actually a better, more capable machine than the Amiga, was nowhere to be found.
Its because of the pins used on the accelerator that screwed the socket Rounds pins are NOT correct for that socket And the master system came out years after nes direct competitor from sega was sg1000
I'd like to see you get the SEGA working, but if there is much more than power supply problems I doubt you be able to replacement IC's. I bet a centre positive power supply has been connected.
The Sega and the Colecovision were pretty much the same thing, someone put together a dual machine that had two halves of a console that both used shared ram and CPU.
Slap a PiStorm on it and we'll talk speed :-) For the green screen, reseat the socketed chips. Not sure the jumpers 512k/1MB chip with the slot ram can cause issue.
This is not the first time I hear some UA-camr talking nonsense about rf shields. They ARE necessary even MORE because of all the radiation being transmitted today.
The Master System had something like the PC Engine Hucards but I never saw one in the uk. Sega uses normal Atari type controllers and if memory serves Commodore machines CAN do multiple fire buttons. The Amiga definitely could
Yep, it's a different pinout than the Amiga's, but the analog lines used for paddles could just send full voltage back and software could interpret that as a B or C button press. Hardly any games were ever designed to support it, though.
The only thing I have left from my A500 Plus that died pretty much 20-ish years back cos of the internal onboard battery is the 512k RAM expansion, an aftermarket job with 4x 30-pin SIMM slots, not sure why I'm holding onto it given the sockets are damaged cos cheap plastic clips and breakages... :P
Look for the manufacturer's name Matsushita Electric. That was the "actual" name of Panasonic from 1935 to 2008. Sprinkle some Viagra on that antenna - that'll straighten it right out. 😀
That's actually a samsung keyboard (can be recognized by the 2 ribbon cables, mitsumi is always a sigle ribbon). Very relaible, but when it comes to typing feel, it's noticably worse than mitsumi, but not bad. It's just the characteristic that is not *as* good.
Oh, another one about the Master System: Commodore A/V Cables for Composite should work as well. Just don't use the S-Video thing. Isn't the Master System RGB compatible??
37:56 HEY ADRIAN i have spare crt for that tv it same band name panasonic it never been used over 25 years i only remember been use two times and been in store for over 25 years it 1986 and mode is TRH-513T it same 5in crt only thing is wrong with it is board caste (no channels being pick up at all) im wiling sent it to you if you want just save shell
![Adrian's Digital Basement ][](http://yt3.ggpht.com/ytc/AIdro_k7CrQRe71qN6c0Ua7A1P_I8KkxjqLa70u0zYeCvdvnKw=s48-c-k-c0x00ffffff-no-rj)
Sega master System made an amazing success here in Brazil. Nice to see it on repair.
Glad the Sega arrived in good condition, can't wait for the repair video 😎😎
Is the Master System's AV out the same as the MegaDrive/Genesis?
@@GeoNeilUK yes it is
I was surprised to see this sent to Adrian. I don’t think I’ve ever seen him repair consoles.
@@user-yr1uq1qe6y he repaired the Atari 2600 I sent him :)
@@thenewretroshow I’ll need to find that episode. Nice to add to the mix!
LOL, i love the headling - "Everything in this video is broken". Now that makes the video even more worth watching
Exactly what I was thinking "everything is broken" he says, "oh good I think"
I'm not sure that the equivalent video "Everything in this video works!" would be as interesting.
Even Adrian?
@@AltimaNEO Hopefully not :)
@@sandman9601 Except if it was very rare stuff. But yeah, a working Amiga 500 and Master System, both pretty common, only make for an interesting video if you're going to do some wild modding to them.
"(Sega) just didn't seem to compete with Nintendo stuff"
Them's fightin' words!
I've been wondering when something SEGA would arrive in the basement! Can't wait for the repair!
Ahhhh, the days when department stores like Sears, JCPenney and Montgomery Ward were king and put their brand on all the electronics.
It was a way of a brand like Panasonic to sell a product at (likely) a lower price point, but not dilute their brand cheapen it, and lower the price they could sell a REAL Panasonic TV.
It's not unlike all the products you see at Trader Joe's that are actually well known brands, just slightly cheaper versions of it.
I don't think we see it today because electronics are al just commodities these days, and there's not much margin to shave away and sell at a lower price.
@@stevesethera little bit of it we see today. Because its so easy to get a hookup from alibaba to get generic products with your shops logo
IMO, the Sears version of the Atari 2600 just looks so much better. As for that mini TV, I honestly think the JCPenny one looked nicer.
You sure do hate RF shields. They provide structural support and have taken a dent instead of the motherboard for me once in the past. So I keep them on.
On the A500, check JP2 and JP7a, the could be configured to use the expansion ram (A501) as chip ram, this would give a green screen if the A501 is not fitted.
I'm screaming at the screen, put the expansion ram back in!!
Yes...or agnus needs reseating. I doubt someone sent the system with all those goodies if that was the issue. Not to say they didn't but I'd be surprised ?
Might have the a500+ agnus installed too.
@@UberAlphaSirus The Agnus from an A500+ would not function in a Rev 6a board as it’s not pin compatible, you need an adapter board.
@@GrahamTinkers Not sure what board I have in my A500, but I did convert it to an a500+ by cuting and bridging a few jumpers and putting an A500+ agnus in it and 512k or 1.5mb cheese. you have to blank a pin on the new agnus with a bit of tape or cut a track. It was a couple of years ago, so my memory is a bit vauge. Works fine, even on 1.3. Haven't burned a 2.04 for it, but tested with a 2.04 from my orignial A500+. Can't rember, aint the a500+ agnus a fatagnus?
Theres a guide online somewhere. I can dig it out if anyone needs it. Also lerned that them quad pack chips don't have pin one on the corner too, I had to look that up as the pin you had to insulate didn't count out right and thought the guide was wrong, but sure enough, it was right. Not a painfull mod/upgrade to do. I'll put a rom switcher in it when I get around to it. I remeber my board had a big PCB hole cutout under the agnus so I didn't need the tool to get it out, that might give a clue to the rev. I would look but it's in the cuboard behind santas cache. I do have the old agnus at hand though, MOS 8371 datecode i think 4588 dunno what the 21 is batch maybe.
Thinking back on it I think Adrian done a video on the conversion unless I'm thinking of the multirom for the C64, that BTW works awesome Adrian. I used a switch though.
I don't know why, but center negative 9VDC is a common thing in 70s and early 80s hardware, but not if they're any other voltage. This noble tradition lives on in stage audio gear, which is all 9VDC, center negative. Always give 9V wallwarts and bricks a thorough double-check when you aren't 100% sure they match the hardware.
Decoding channel 2/3/4 and outputting composite is a good use for a mechanically dead VCR. That might be good enough for a screen capture if you get the game console working.
I think the tradition might come from old transistor radios which were always positive ground.
Those old vaccuum tube TVs take a LONG time to warm up and give an image, around a minute or more as I remember from my childhood, I used to watch on my father's old Sanyo B/W portable 14" TV. I used to watch the tubes in the back warming up and starting to glow through the heat vents and I would always know when the picture was going to start coming up on the screen. Ah man, back to Elementary school days.
My thoughts as well. Given his previous work on CRTs I trust he left it running for longer than it was edited down to appear. I hope, at least.
@@xredhead7135x It's a CRT but it's transistorized, hence the big "Solid State" label.
@@mfree80286 the screen would still require time to warm up
@@xredhead7135x The worst CRT warmup I've seen is an old arcade monitor which takes about a whole minute. But that's a heavily used monitor with enough wear the burn-in is super obvious. If the set were working properly there would most likely be noise from the audio circuitry. I'm guessing the CRT is warmed up but a boost voltage derived from the flyback is not coming up.
@@eDoc2020 as a kid, I had an old black and white small TV made in 1980 which when left alone for a while would take 3 to 5 minutes to brighten up.The first 2 to show light in a lit environment. Yes, you're right about audio straight away if present or static, but no audio is not indicative of immediate trouble. This would've been late 90's that I used that old TV.
That OG Master System is a beauty
18:54 Sega Master System (SMS) does use a "compatible" Atari joystick. You can use the Sega controller in an Atari 2600, Atari 8bit/ST, Commodore Vic/64, or Amiga, it's just the extra button will not do anything, I did test this back in the 80s. Conversely (but never tested) a standard Atari joystick will work in the SMS but since it lacks that 2nd button you'll have limited use or not work at all. Also the SMS controller only has 2 buttons, there is no start/select button like the NES controllers did.
The Master System came to the US around the same time as the NES. I got one for Christmas when my parents couldn't get their hands on a Nintendo.
It definitely had better graphics, but like you said, the game library wasn't there.
The masked ROM contains Hang On and/or Outrun, which were fun enough for preteen me. I want to say the flat Card ROM was identical to the TurboGrafx 16 / PC Engine, and had an extremely limited address bus / memory space.
The cartridge ROMs were much more common and had better titles. Great Baseball has an umpire with C64 Ghostbusters quality audio samples.
LOL, used to sing "do re me" "so la te DOH.
Oh, and *edit: I think* it uses the same shift register as the NES for D-pad / A / B /Start / Select, but the last two don't map.
to bend the antenna, extend it all the way and heat the end with a torch. it's much less likely to break if you heat up the metal before bending it
I’ve repaired several Master Systems over the last couple years. The first thing you always want to do is reflow the solder joints for the power switch. They seem to be prone to cracking so it’s always good practice to freshen them up.
If that doesn’t get it working the next step is to check out the 7805. I’ve had to replace at least one that was blown due to someone putting an NES adapter in there.
The Sega Genesis 2’s solder points for the power barrel are also known to go bad, so I usually freshen those up in the Master System as well. Maybe not needed, but certainly can’t hurt.
For the Sega Master System many people plugged in the wrong polarity power supply burning out the 7805. Usually a easy fix.
Hello back. I am in Bremerton right next to Port Orchard in Kitsap County Washington State. I have relatives in Oregon so I have been down there a lot.
Hanging out for the repairs.
Just what I needed for my Sunday afternoon:)
genesis/megadrive controller works fine with mastersystem. DIN connector is very easy to get composite (and indeed RGB) out.
Was very popular here in UK as a budget option to the megadrive. (The NES didn't do well here)
Card port barely used.
Can get very cheap Chinese everdrive clones.
Usually mastersystem has a built in game on the rom - you can tell by model number :)
Hope you enjoy it - it is worth repairing :)
Try sonic 1, 2 and chaos
As for the JC Penney TV, it reminds me that I'm slowly working on integrating my 3rd C64 DTV inside of a Goodmans GTV 9100 6" portable television (also sold as a TMK 510CP in NTSC land) with the idea of making it a kind-of "compact SX-64", but with the additional option of video input, using the TV inputs internally for the DTV, retaining the rear switch between TV & Video input, cos why not... :D
The 68010 basically fixed the only fundamental error the 68000 had. Namely reading the SR register was unprivileged in the 68000 and became privileged in the 68010. This change allowed the 68010 to be virtualizable. The MOVE from CCR was added to compensate for the change, and the VBR register was added to allow the 1KB exception vector table to be relocated.
In contrast, the x86 architecture wasn't fully virtualizable until 2005.
I had a big boombox from JCPenney, and it was awesome even though I live in Europe. I have converted the whole thing into an European boom box. It had an awesome bass, and treble, and it was super reliable and it had almost every part made out of metal instead of crappy plastic.
For the Master System, the card games are rare, but could hold a small game ROM and be sold at a lower price, the issue was that the maximum ROM size(32kb after a quick Google) was so small it was practically useless.
You can use a 2 button C64 joystick(such as the one included with the C64C/Robocop 2 cartridge bundle and the C64GS) or a Sega Mega Drive controller(B and C will work as 1 and 2 respectively) to use it.
The Sega Master System was the North American version of the Sega Mark-III. It could display 32 simultaneous colors.
en.m.wikipedia.org/wiki/Master_System
Did you try the Amiga with the extended memory card in it? They may have modified the motherboard to use that trap door ram as chip ram (by default I think it's "slow" ram), and now you're getting memory errors because it actually needs that trap door ram.
even with a modded motherboard for 1MB chip RAM, a working board without the expansion RAM won't green screen and you will get a kickstart screen with just 512k chip. Likely causes of green screen is bad CPU socket and/or Agnus needs reseating and/or bad chip RAM
@@iamdkk I'd replace the socket, unless I planned to reinstall the accelerator permanently and didn't want to wreck another socket. Reseating Agnus should be tried because it doesn't cost anything. And it already sounds like he's leaning toward putting the full 1 MB on board, if he has to replace chips anyhow. Might as well just socket all eight spots.
This feels like a Michael MJD episode... ;-)
Excited for the A500 repair. I bought the bare terible fire boards last year but haven't bought the components yet.
Re; using genesis controllers on the Master System. I recall back in the day being able to use one in a pinch, but there might be a compatibility issue with select games that I read on the internet. I think it was mentioned snipping or removing a grey wire to fix that issue. I never had to resort to that when I was a kid though.
I think you will be surprised by the master system when you get it working. The sound is much better than the NES and it is capable of so much more. Especially in racing games
I hope the Logica ROM will help you fix this poor A500, Adrian. I got the idea from one of GadgetUK164's videos and mailed the decoded ROM image to you a while ago.
I would replace the first DRAM chip as the red flashes indicatie it cannot allocate 70k of continuous chipram as that's all it needs to run IIRC...With 128k of working DRAM it should boot and reveal any other faulty DRAM chips. If it doesn't it could be a bad IC in the data path or a bad Agnus or Agnus socket. If you get this ROM to boot it should even point out the socket numbers which is a very nice feature especially on old A2000 that have 32 DRAM ICs! The ROM helped me save quite a few A2000s as well that had bad chip RAM and even one that had an interrupt issue which Logica pointed out. I saved me a lot of time scoping out those giant A2000 boards, thats for sure!
Luckily there are only four of them on this one but those Siemens and Fujitsu chips are a bit of a disaster on the A500. They all seem to fail lately! I've seen dozens of Amigas with bad Siemens chips.. Must be because of faulty PSUs, just like the faulty Micron DRAM ICs on C64s because on the A2000s they seem to last quite a bit longer..
Sega MS does have built in games. Which games you got I think depended on the console. Mine came with Hang On and Safari Hunt (I still have the light phaser.)
It's compatible with the same AV pinout as the original Genesis. I also distinctly remember running it on the same 12v adapter that the Genesis used.
I just beat Phantasy Star on MiSTer and Pocket (the save is portable) Frank Cifaldi's SMS Power! has an amazing rom hack that restores FM sound and has a better translation/better text fields. So so so worth playing (I'd crank XP to 4x and halve encounter rate - it's ridiculously slow going otherwise and it doesn't make battles easier, just less frequent).
Adrian's Digital Basement 2: the only channel that I want to see broken things. 🤣🤣🤣
That's a Master System 1, they dropped the card slot thing for the Master System 2, Also, a Standard Amiga/Commadore controller/joystick will work with the Master System, It only had a D-Pad and, Button's 1 and 2.... I used to use my Master System controller on my Amiga 500 all the time, and my 'Micro Bug' joystick on the master system when I had a 2nd player :)
Oh, and did you notice the JC Penny TV said 15v 5w, while the Panasonic, said 12v 4.5w?
Adrian, you should see if you can remove that TV antenna easily. I'm betting that it is a standard 90 degree telescoping antenna with that black plastic being a shroud just for style that locks it in place. If that is the case then a replacement antenna should be easy enough to source. Just a thought when I saw both units side by side.
You've inspired me to (potentially) dig two interesting little beasts out of the basement and get them running... First, I have a Commodore 128D, the one in the metal case with integrated floppy drive and cabled keyboard, that had every other column of keys fail to register last time I used it. Second one, and I *think* it's down there but it may be in storage, is an Atari Mega ST2 that I have no accessories for at all... but I do have a Commodore 15khz monitor down there somewhere too so at least I should be able to rig up a video cable, if that's necessary.
There's an Amiga 2000 with an upgrade board around here somewhere too that I haven't seen in years, got it to boot and... it was a bit unreliable. Space was needed, stuff got stored, time flew, and there's a cache of goodies in an outbuilding on my old family property that I'm ashamed to admit hasn't been opened in probably 20 years and now I'm kind of afraid to see what became of a TRS-80 model III, DEC rainbow, pile of Sun 3 series equipment, heath/zenith Z80, etc. It might be time to suck it up and pay for a second climate-controlled storage unit and move it already.
Hello Adrian,
I picked up a Realistic Portavision television. The radio works great but I can't seem to get a full picture.
SMS was part of that ol' ColecoVision/MSX/Etc chipset. I wonder what company put those chips together in that combination for the first time and sold it around.
In Ireland, we know about JC Penney, because it blocked one of our native lower-cost department stores spreading because it was called Penneys independently of the US chain. So, outside of Ireland, Penneys is known as 'Primark'. It's basically the Aldi/Lidl of clothes in Europe: better quality than the price, but still a bit crap. Great in a pinch though, and half of Europe wears stuff they make at this point.
Hi Adrian - When you get to the SEGA Master System repair, we had one growing up and if memory serves, there was a built in game that you could play without any cartridge installed. I could be wrong, it has been a long time. lol Love your videos. Keep up the great work!
There was. Hang-On, Alex Kidd in Miracle World, Sonic the Hedgehog and Snail maze. I unfortunately have one with Snail Maze. Soooo boring.
Howdy from Richmond, VA long time viewer of both channels love your content and hope to see more
The “PDS” slot is a Zorro bus slot. Also, I think the RAM expansion just expands chip RAM, though other types will add Slow or Fast RAM. I think only Zorro supports Fast RAM, but not sure about Slow.
I have an A500 I bought off eBay a few years ago, but haven’t checked it out. I was an Atari ST guy back then.
Oh, and M&Ms > Smarties ;-)
The Sega Master System was the first console I had. Mine came with built in Safari Hunt and Hang On, which I played the hell out of! Before the SMS all my gaming at home had been ZX Spectrum based. Loved the SMS, and just didn't get the appeal of my friends NES's
An unexpected repair video. I shouldn't be cheering, but I am.. Bring on a fun diagnostic video.
can you tell me what the Amiga power supply replacement is? Thanks
3:37
I believe the Sega SG-1000 came out the same day as the Nintendo Famicom and was Japan only. I believe the Master System is an update of the SG-1000 and is backwards compatible.
The Sega SG-1000 which was close enough to the ColecoVision for the Bit Corporation Dina to be simultaneously a clone of both systems came out the same exact day as the Famicom, iirc.
Aren't both of those consoles very closely related to the MSX platform?
Makes me wonder why Coleco brought out the Adam instead of an MSX machine.
@@GeoNeilUK Yep. Different but similar sound chip; same video chip and same CPU clocked at the same speed.
That small TV looks like something out of star wars😂
I know a genuine Panaphonics when I see one!
Many a Master System has a fuse that's blown just like on the Sega CD. The fuse looks like a resistor, check that before the VR. Also the Master System has some really great large games and there was an expansion that adds a Yamaha FM synth sound and many games supported FM even though the expansion was never released in the USA there's kits to add FM sound to the USA version
Pretty sure that you can use a standard Atari controller on the Master System. By the way, it's a derivative of a series of consoles Sega only released in Japan - the SG-1000, SC-3000, and the Master System is the international version of the Sega Mark III
Nice UA-cam icon! 😊
Considering a Master System controller works as a 2 button C64 joystick(Robocop 2 is the only game I have that supports it), I assume a 2 button C64 stick should work fine. A Mega Drive pad would also work for Robocop 2, with B being shoot and C being jump, so you could probably use one of those, too.
@@fattomandeibu If I remember correctly, there's one button you shouldn't ever push when you use it in a C64 because it sends voltage somewhere that destroys a chip.
@@gmirwin This joystick was included with my C64C Robocop 2 pack as well as the C64GS. It wasn't made by Commodore, but it was their official 2 button stick.
@@fattomandeibu Hmmm... I didn't know there was a 2 button option for the C64. Anyway, it was a Sega joystick that I meant would damage the CIA chip.
We have stores that have their own brands. Amstrad was never a house brand but were cheap (they're now Sky TV's STB manufacturing arm) but Dixons had Matsui and Currys had Saisho.
Even now we have house brands. A lot of them are long dormant brands that used to be manufacturers in their own right. Bush and Alba are Argos home brands now.
68010 adds virtual memory to the 68000, but it might not be of any use without the MMU chip.
The A500 keyboard is a dual membrane model by Samsung. The membranes are not available like the mitsumi ones are (at least not that I can find) but they do seem to be reasonably reliable.
Most sega master systems have a built in game as well.
Hey Adrian! Been awhile since we met at VCF Midwest. Green can be a few things (databus) but in my experience, yeah probably bad RAM. The 536 is an amazing expansion! I have fixed many 500s with green screens, 99% ram.
I probably should say, RESEAT AGNUS FIRST. I've fixed plenty that way too, the above assumes this failed. This note is for others not Adrian, he'd already try that.
Why there is a blurred retangle over the motherboard?
You can now build your own 70s/80s era luggable vr headset. Sort of a B&W quest 0.1 static edition.
I wonder if it is worth buying one just for the chips?
I wondered if the Panasonic is a later styling refresh as opposed to the JCPenney's. It just looks more eighties if not nineties, while the latter looks older. But then you said the manufacturing dates were just the opposite. Weird. Maybe they deliberately made it look last decade to segment the market, as it was going into JCPenney's
Broken things = more videos = more enjoyment :D
The 68010 requires a program called DeciGel to bypass one of the updated instructions in the CPU. There were 3 types of keyboards released for the A500. And the green screen includes other issues than just bad chip ram.
The Logical ROM is available on the AmigaForever CD/download.
That JC Penny / Panasonic TV kinda reminds me of a PipBoy from Fallout…
Adrian, what is the app on the phone to see the spectrum? Thanks.
Spectroid
Master system should have a built in game ( which game varied by year). A standard genesis controller SHOULD work. Works with most games at least, but not all. If you decide to burn a game, sonic 2 for the master system is actually really good and a different sort of game than the one for genesis.
If I remember right, mine had snake or some maze game built in. I am pretty sure you are right on the genises controller.
@@tanithis Maze Hunter 3D? Did you have the system with the 3D glasses? That's the one I had.
@@Darxide23 No, I think it was Snail maze.
@@tanithis I think Snail Maze was hidden in all SMS consoles. It was the default built-in for the first ones on the market, but after that it was a hidden "easter egg" in later consoles that had other games. I'm pretty sure mine had it, but it's hard to remember now. I haven't had my Master System in more than 20 years, sadly.
@@Darxide23 it was early 90s for me and I remember my mom got it for me from a pawn shop so I have no idea lol
Adrian, you forgot to note that the CPU socket was loose in the Amiga 500. It may not be the error you encountered but it could be enough to stop the Terrible Fire from working.
The Sega Master System is essentially a re-boxed version of the Sega SG-1000 Mk III (released in 1985, Japan only with earlier marks dating back to 1983) with a slightly different cartridge connector. It is backward compatible but you would need and adaptor to plug in the older cartridges. The version I have in the UK has 'Alex the kidd in Miracle World' as a built in title that is accessed without a cartridge in the slot. The Master System was not very successful in the USA and Japan due to those markets being saturated by the NES and Atari machines but did quite well in Brazil, South Korea, Australia the UK and the European market. There are 312 games available for the Master System.
That's always a problem when putting those rounded type pin headers into the double wipe sockets. Over time the big round pins will make the connection so loose in the socket that everything you install afterwards will have a bad connection.
“Amiga’s are reliable”.
Clearly hasn’t met the Vartas of Death!!
Do you work on old sony short wave radios?
The Master System wasn't slightly superior to the NES in terms of technical specifications. From a pure hardware standpoint it blew the NES out of the water in virtually every column. Arguably, the NES had better sound capabilities, but that's about it. The Master System even had a hybrid 8/16 bit architecture. The entire graphics bus and subsystem was 16 bits. The Master System's graphics capability is far more comparable to the SNES than the NES, just with a reduced color palette and colors on screen. Anyway, you can look into that more yourself. But where the NES had the advantage was with 3rd party developers. In the early days, Sega almost exclusively shunned 3rd party developers in favor of developing everything themselves. By the time they realized this mistake, Nintendo had pretty much gobbled up all the 3rd party developers into contracts and nobody wanted to develop for the Master System.
Nobody in a Nintendo contract could develop for Sega. Nintendo contract made those games exclusive to Nintendo
Chip memory is alternately controlled by the CPU and the Amiga chipset.
Slow memory is the same, but the Amiga chipset doesn't intervene and the clock stays empty.
The CPU can run synchronously with chip memory or asynchronously. But if the CPU runs asynchronously quickly. then the CPU has to wait until the bus to the chip memory is free.
Fast memory is only controlled by the CPU and can have a clock speed at the same speed as the CPU
The IDE port is basically an 8 bit data bus and some software ...
not all the master systems had a built in rom but quite a few did.
The Master System controllers actually don't have a start or select button iirc. At least in the traditional sense. They have the D-pad, 1, and 2. 1 usually served as a press start button before gameplay began, so to pause you'd have to get up and press the pause switch on the console itself. As people have said, the master system was the international version of the Sega Mark-III.
In addition, the cover did hide a cartridge slot of sorts which would allow for planned expansions to be used but none were ever officially released.
@@jefflavenz7285 to piggy back off this, there is a FM mod created by Tim Worthington which can be installed into that unused slot which will enable Yamaha FM soundtrack hidden on a select few titles. Also I think there is an adapter that can utilize that slot to play Japanese Master System/Mark III games.
Max. 2MB Chip RAM for the AGA models and some ECS models.
The reason why the NES dominated in the USA is because Nintendo's restrictive conditions on releasing games for the NES alongside their lockout chip.
When you force your publishers into a two year exclusivity deal, where any rival platform is going to be two years behind your platform, you're either going to die quickly and hard or form a monopoly.
In the USA, Nintendo formed a monopoly, in Europe, they were outsold by the Sega Master System which in turn was outsold by the 8 bit microcomputers - the Commodore 64, the Sinclair ZX Spectrum and the Amstrad CPC. Surprisingly, the Atari 8 bits, the MSX, the TRS-80 CoCo (or Dragon for that matter) or the BBC/Acorn Electron weren't as big.
Even in the day of the SNES and the MegaDrive, the Amiga was a big competitor over here in ways that DOS or Mac weren't almost entirely down to the affordable prices on the A500, A600, A1200 and the software bundles. Surprisingly the Atari ST wasn't quite as big and the Archimedes, which was actually a better, more capable machine than the Amiga, was nowhere to be found.
Its because of the pins used on the accelerator that screwed the socket
Rounds pins are NOT correct for that socket
And the master system came out years after nes direct competitor from sega was sg1000
PAL SMS usually had Alex Kidd game built in. Not sure about other regions. SMS was quite a bit more capable than the NES.
My Canadian SMS, I can't remember what came with but it wasn't Alex Kidd.
I'd like to see you get the SEGA working, but if there is much more than power supply problems I doubt you be able to replacement IC's.
I bet a centre positive power supply has been connected.
The Sega and the Colecovision were pretty much the same thing, someone put together a dual machine that had two halves of a console that both used shared ram and CPU.
True for SG 1000, but the master system is considerably upgraded from the 1000
Slap a PiStorm on it and we'll talk speed :-)
For the green screen, reseat the socketed chips. Not sure the jumpers 512k/1MB chip with the slot ram can cause issue.
You make me miss Low end Non Walmart Department stores like Wollco and Zellers now hahaha.
Reminds me of my brother in law's 1200... he had so many upgrades in there you couldn't screw the case together anymore.
Woodbridge is just a stone’s throw from D.C.
For the SEGA Master System:
Mega Drive Controller work fine. Atari not that great, as one button is missing, Rest should work though.
This is not the first time I hear some UA-camr talking nonsense about rf shields. They ARE necessary even MORE because of all the radiation being transmitted today.
The Master System had something like the PC Engine Hucards but I never saw one in the uk. Sega uses normal Atari type controllers and if memory serves Commodore machines CAN do multiple fire buttons. The Amiga definitely could
Yep, it's a different pinout than the Amiga's, but the analog lines used for paddles could just send full voltage back and software could interpret that as a B or C button press. Hardly any games were ever designed to support it, though.
The only thing I have left from my A500 Plus that died pretty much 20-ish years back cos of the internal onboard battery is the 512k RAM expansion, an aftermarket job with 4x 30-pin SIMM slots, not sure why I'm holding onto it given the sockets are damaged cos cheap plastic clips and breakages... :P
Look for the manufacturer's name Matsushita Electric. That was the "actual" name of Panasonic from 1935 to 2008. Sprinkle some Viagra on that antenna - that'll straighten it right out. 😀
That's actually a samsung keyboard (can be recognized by the 2 ribbon cables, mitsumi is always a sigle ribbon). Very relaible, but when it comes to typing feel, it's noticably worse than mitsumi, but not bad. It's just the characteristic that is not *as* good.
And one last thing about the Master System:
The Version you got might not have a Game inside? I think only the Master System 2 did....
They had snail maze
they probably connected the wrong power supply to the master system and didn't know it was center negative
Come on down to Manolio Ugly One’s Used and Broken Electronics! 😁📻🥊🐑
Aah!! Sheep!! You lied!! 😭
Oh, another one about the Master System:
Commodore A/V Cables for Composite should work as well.
Just don't use the S-Video thing.
Isn't the Master System RGB compatible??
the mastersystem one (as Adrian now has) is great as has RGB. Mastersystem 2 was cost reduced and had RF out only (at least in Europe)
that's a beefy accelerator, 64mb fast ram.
as for sega i am only familiar with the sega Model 1601. i was also more of an NES person.
A Sega Genesis Controller can be used with these.
Most if not all of J.C. Penney electronics were made by Panasonic.
37:56 HEY ADRIAN i have spare crt for that tv it same band name panasonic it never been used over 25 years i only remember been use two times and been in store for over 25 years it 1986 and mode is TRH-513T it same 5in crt
only thing is wrong with it is board caste (no channels being pick up at all) im wiling sent it to you if you want just save shell
my ringtone on my phone is startup for sonic it says sega then sonic intro plays