I was sad for a second thinking I didn't have anymore Adrian to watch, only to realize I had to sleep halfway through this! I have the rest to enjoy now!
It's great when you suggest "...this video could be a complete failure...", I immediately check the timeline length... cool! Over 1 hour... I'm in, with popcorn ready! 🍿
There aren't many creators on UA-cam that can post an > 1hr video and have a guarantee I'll watch it. Obviously Adrian you're one of them, and you never disappoint. Thanks!
teaching is never a failure, because when you make these videos you teach others even if you can't fix something. its still a learning lesson. Because you show even a person that knows as much as you can't always fix something's.
As others already pointed out: the beep beep bop boop boop. Is actually the "in tel inside" that was in those older intel cpu advertisements but in beeps
[53:46] high quality bodge! I love it when you can fit pin positions right over stuff, and it's rare that you can bodge a whole chip like that! [54:44] yeah, that's a nice little nest you've got there [58:49] Be careful with the wire dangling like that. I used to do Sega Saturn switch mods with the switch dangling out the back on ribbon cable wires, and the wires would wear out at the bend and fail open. Hot glue may not be enough strain relief because there will still be a bend point. The D connector itself would need to be glued down. [1:07:45] even just having unused pads on the board for the chip would have been fine, at basically no extra cost
Wow you made it again down into that rabbit hole ! Amazing work, thanks. This external monitor feature definitely is missing and it is sooo funny we see already repair videos on retro projects released in 2022/2023!
The best kind of repair, whereyou identify the exact fault instead of just swapping parts. Awesome! Nice bodge mod too, reminds me of my homebrew c64/1541 JiffyDOS rom switcher. :)
74244 not only provides a barrier from outside world, but also has a higher current sourcing ability than standard 7400 logic (IIRC). This helps with signal integrity through cable capacitance and whatever termination circuitry is in the monitor. In this case, the 74244 also provides 3.3v to 5v level-shift.
I’d guess that the failure is internal corrosion at the point where the jumper wire from the chip die is welded to the incoming (much bigger) mounting lead. Those are typically tiny fine wires.
and not even a faulty die, but a faulty package. Actually two of them. How did one machine got two cracked chips while everything else survived is a mystery to me at least
We had an issue on a dead channel on our pick and place machine. When I pulled out the card and desoldered the shift register, some of the pins were also dodgy like that. It was clear someome changed it, and reused some chips.
If the Book8088 swapped places with the Hand386 (and they produced a modern 386 laptop), I'm sure they'd sell a lot more of those EDIT: turns out they did. It's called the Pocket386
Love this! I did 8088 assembly language for 20 years, also i have seen slow scrolling and fast scrolling, i forgot why my last 8088 was a tandy 1000 that had the pcjr video
look closely at the 3rd pin bottom right. you mentioned in the vid that it was "longer". I suspect it had been mechanically stressed when being removed previously.
The three big Chips are "Atmel ATF1508" CPLDs, shortly said just bigger GALs/PALs. I think it would be fun to just try to read them with a compatible Chipreader, maybe the lockbits are not set, so you can get the code out of them. I worked with them on my job and even the JEDEC map looks like a map from a GAL16V8 its just a lot longer ^^
Adrian, have you shared, or would you be able to share, a list of what you've got on your magic CF card full of things? It would be great to be able to self-assemble a similar box of tricks for booting older PCs!
At the Revision 2024 demoparty, we had someone bring us a demo on a Book8088. Because there was no output to capture from, we recorded it in the back of my car with my smartphone, so that’s what went on the big screen. Fun times 😊 Hopefully if someone brings another one next year it will have this mod to give it a video out that we can capture from
That was kind of an interesting failure, after you went through the effort of actually hunting for the bad signal (and not just replacing the offending chip and calling it a day). Thanks for that, much appreciated!
I remember writing software for old MDA and CGA, instead of using the really bad BIOS and DOS stuff for the displays I wrote my own. The CGA would show static if you didn't wait before writing which slowed it down a LOT. When a CGA would scroll the screen would blink in the most annoying way. A little bit of snow was better than the blink. I mostly used MDA video as CGA was so bad. It was fun writing PC software back in the days where there was almost no software for it so you had to write everything. I hope people can use these modern 8088 type machines to get a feel what it was like back then!
The slow scrolling is caused by the bios, it may be trying to avoid snow while updating the screen, and/or redrawing the whole text screen (instead of using the hardware scroll and drawing only a new line at the bottom every frame).
Are you able to test out ELKS running with this and CCGA, and try to get NX or some micro X implementation running?! Also will these work with an 8087?
I first ran ELKS on my Amstrad PC1512SD. Ran pretty decently even with 512kB ram. I don’t remember whether I attempted to run X on it. Probably would have been rather painful though.
If you carefully look at the Harris chip, it seems like the two legs next to the broken leg are not aligned, like there was some kind of delamination with the plastic package. Broken bond wires inside ?
Pretty cool to see peeps tinkering with these. I got a v2 and the add-in video card (CGA to compliment the provided VGA in my case) and it's been a fun tinker toy for all things XT. I ended up ripping out the buzzer and running a wire from the speaker out through a 100ohm resistor and some diodes to the analog out of the YAC512 to get PC speaker though the built-in speakers and line out. Believe it or not it works surprisingly okay...Though I did also add a volume slider which I'm kind of surprised they didn't fit in the original design as well...Much needed in my case.
From the datasheet of the Atmel CPLD. "The ATF1508AS also supports the growing need in the industry to support the new Peripheral Component Interconnect (PCI) interface standard in PCI-based designs and specifications. The PCI interface calls for high current drivers, which are much larger than the traditional TTL drivers." So you seem to have succeeded in buffering the CGA output with a device with poorer drive capabilities (74LS) than the source device :-)
@@adriansdigitalbasement If you are going to lug it around I recon either the wire will tear itself off or the SMD spider is going to break somewhere in the most inconvenient of times. That always happens to be it seems. Perhaps it might be a good idea to order a custom PCB and dremel the DE9 into the case if you happen to have any spare time for that. Admittedly I've done my share of haphazardly soldered bodge-nests and paid the price of extreme inconvenience for that
@@adriansdigitalbasement In 40 years people will discover this video, and they'll be screaming at their trans-meta zuckerborg implants about how you're "destroying history" of these incredibly rare reproductions of the first computer! Less than 5000 were ever produced, and only 10 survived!
@@adriansdigitalbasement Maybe a small circuit board for the 74 series logic chip with the correct layout would be a good idea? But who could make such? 😁
With that neon orange soldermask there was a concerning moment when I thought this entire thing was a weird flex PCB. Thankfully it's just an odd color choice.
It was very cool literally getting to see that chip fail on boot up. You get so used to seeing things in nondescript boxes, and you forget how complex they are on the inside, and then you get to see literal signals moving along pins. It's awesome!
Another option you could do for your protection circuit would be to go to pcbway and make a small PCB for just that chip. Then use 0 ohm resistors or jumpers to connect the cable. Put the pcb in the cable and 3d print an enclosure.
Agreed. Actually I more or less successfully fitted a PCB with a PCB-mountable d-sub connector inside the normal plastic enclosure once. I did have to sand the backside of the PCB a bit though. But it also seems to me that there is just about enough space to install the connector on the laptop's housing, and PCB can just be hot-glued inside then.
I wonder if you could grind the top of that chip down to get to the metal frame next to that pin and fix it. Hopefully not a dodgy bond wire to the silicon. I guess that only matters if it's a super rare chip though.
Would be interesting to see where the physical failure point in that IC was. Maybe a break in the lead frame, or even one of the bonding wires right inside it. Unfortunately you'd probably need to use an x-ray, or a de-capping compound to remove the epoxy without damaging the bonding wires.
AliExpress does indeed have a VGA version of the Book8088... but they also have the Pocket (or Hand) 386. Which is a 386SX. I gather its 8-bit ISA expansion port is compatible with the Book8088's, and has an addition expansion for 16-bit ISA. That one rather interests me.
The Version 2 is VGA with external port and has replaceable video cards, 3 options. They have also released the Pocket 386 that uses the same laptop format, with VGA, and full 16 bit ISA breakouts and a external bord to use them. It comes with a PS2 and VGA port cable.
Nice fix, and mod, Adrian :) But why don't you install the 9-pin connector into the back of the computer, just where the cable comes out, not to have a fragile cable and connection loosely hanging out there?
Adrian - lots of the links in your description dont work in the USA (ebay and amazon) and a few more links would be cool -- I noticed you have a hot air reflow kit on the shelf, do you like it, what is it since i'm in the market for one to replace some USB-C Plugs on some thinkpads :)
I'm going to have to check my original IBM CGA card out here in a bit on my 5160. I don't recall it being *that* snowy or slow. Huh. I need to plug in the RLL HDD in it for it's 6mo spinup exercise and repark anyways.
I noticed that when you were seeing very slow scrolling, there was no flicker. My guess is the BIOS you are using is waiting for VBLANK before accessing VRAM.
I still haven't finished the video so I don't know if you solved it, but I can confirm DIR shouldn't be that slow even on a XT with CGA. The only times DIR is so slow is when in the BIOS the "system bios cache" and "video bios cache" options are disabled, but that's on AT machines, I don't think something previous to 286 has system bios cache or shadow or any of those options.
I was just reminiscing with a friend last week and I mentioned that I never see anybody using a DIP break-out clip when probing systems and was thinking about seeing if I could find one to send to Adrian but here he's finally using one.
From my old days, Harris components always had an impedence difference. just touching the probe on the pin will load the line a bit more and give the impression all is good. Even if you touch with your finger, it will load the line enough.
I guess it goes to show that Reduce Reuse Recycle doesn't always work out (specifically the Reuse part) given that you don't really know what kind of life the ICs involved have had prior to being reused, that pin could have suffered all kinds of thermal stress over the years and being extracted, straightened out, polished up and shoved into that Book8088 was what nailed its' coffin shut, but at least it wasn't a fake, not that it's much solace given it's no good... :P
This reminds me of the movie "Disclosure"... one of the problems they had with their CD-Rom units was that the chips were being pushed into the boards by hand, thus bending many of the pins...
I wonder how much of a deal they got on those chipsets. I would have thought an fpga implementation of the system would have made for an even cheaper board (while still using physical processors for that "authenticity").
First PC I owned was an 8088 no HD, 640Kb ram, 12Mhz. Just did a Socket A AMD Athlon retro, and am about to play around with a Slot 1 PIII have 3 MB's two I never even built PC's with. They are NIB as was the Socket A Soyo MB I just used. And I still have the first HD complete with mounted controller card for the 8088, it was 32MB. still have the 8 bit ram sticks.
There's now a Pocket 386 listed on AliExpress which is advertised as having an IPS screen and VGA. Looking at the the few videos available on UA-cam, it does look like the screen has significantly better contrast and is also bigger. Probably more interesting to a wider audience, although the 386 SX-40 isn't exactly breathatking fare, deemed a glorified 286.
On the quality of this I have had 3 Book 8088 and that is the only one that had an issue. I also have a Hand386 that works great. My Book386 (New product) is on order.
I see as well that Book386 appears to have a 16bit ISA connection on the back, along with some other ports. Plus a 4:3 mode for the LCD. I hope the quality of the LCD was improved substantially. I still say it would be amazing if the same person made some micro ATX motherboards with ISA slots and the same 386SX stuff onboard. A brand new 386SX motherboard that fit into a modern ATX case would be super cool!
@@adriansdigitalbasement They did replace the faulty unit. They allowed me to keep the bad one. I am glad to see it working. I thought it would have been a waste to not get that one working. It is good to see if fixed.
@@adriansdigitalbasement I will let you know how the screen is on the Book386 when it gets here in a couple of days. I hope it is better, but I figure it could not be much worse.
To be fair, the manufacturer can only source ICs from the market, and kind of trust that suppliers don't deliver dodgy parts, which today has become really hard for older components.
Hey, my recreated CGA schematics! Glad all that work helped someone :)
Thank you for your contribution to our hobby
I was sad for a second thinking I didn't have anymore Adrian to watch, only to realize I had to sleep halfway through this! I have the rest to enjoy now!
i like the fact that its boot up sound is a version of the old intel jingle
I was just about to ask if anyone else noticed that... I look down and it's literally the second comment on the list. 😆
I knew it sounded familiar lol
The NuXT 2.0 does this as well.
It's great when you suggest "...this video could be a complete failure...", I immediately check the timeline length... cool! Over 1 hour... I'm in, with popcorn ready! 🍿
There aren't many creators on UA-cam that can post an > 1hr video and have a guarantee I'll watch it. Obviously Adrian you're one of them, and you never disappoint. Thanks!
Bodge wire? Bodge wire! How about a whole bodge forest!
Seriously though, nice work!
Its hideous!
Like another person said on another channel: barbaric problems, barbaric solutions.
@@jeffh8803yes it was and I love it something my dad would do lol
teaching is never a failure, because when you make these videos you teach others even if you can't fix something. its still a learning lesson. Because you show even a person that knows as much as you can't always fix something's.
After seeing this thing on Aliexpress a year ago I had so many questions. Leave it to you to answer all of them and more! The mod was amazing too!
To be honest, I still really want one. I also want to make my own... Those PLD chips would be difficult to recreate without the HDL code though.
As others already pointed out: the beep beep bop boop boop. Is actually the "in tel inside" that was in those older intel cpu advertisements but in beeps
[53:46] high quality bodge! I love it when you can fit pin positions right over stuff, and it's rare that you can bodge a whole chip like that!
[54:44] yeah, that's a nice little nest you've got there
[58:49] Be careful with the wire dangling like that. I used to do Sega Saturn switch mods with the switch dangling out the back on ribbon cable wires, and the wires would wear out at the bend and fail open. Hot glue may not be enough strain relief because there will still be a bend point. The D connector itself would need to be glued down.
[1:07:45] even just having unused pads on the board for the chip would have been fine, at basically no extra cost
Wow you made it again down into that rabbit hole ! Amazing work, thanks. This external monitor feature definitely is missing and it is sooo funny we see already repair videos on retro projects released in 2022/2023!
The best kind of repair, whereyou identify the exact fault instead of just swapping parts. Awesome! Nice bodge mod too, reminds me of my homebrew c64/1541 JiffyDOS rom switcher. :)
Still a pretty neat little 8088 notebook, but having an external video does make it cooler!
74244 not only provides a barrier from outside world, but also has a higher current sourcing ability than standard 7400 logic (IIRC). This helps with signal integrity through cable capacitance and whatever termination circuitry is in the monitor. In this case, the 74244 also provides 3.3v to 5v level-shift.
Thank you for that! That explains the interface circuitry for a board I reverse engineered some time ago.
The ALE line is "Address Latch Enable". Without that signal nothing was getting an address on the multiplexed bus.
I’d guess that the failure is internal corrosion at the point where the jumper wire from the chip die is welded to the incoming (much bigger) mounting lead. Those are typically tiny fine wires.
You watching yourself reminds me of Dark Helmet watching Space Balls: The Movie.
When will then be now?
Soon.
Prepare to fast forward! 😂
@@RickTheGeek In fact, never show this part again.
How soon? @@BenKonosky
@@vincentpinckard2243 We just missed it.
Adrian created his own 'glop top'. Loved the entire video. Very informative and just plain fun.
Caught myself trying to click the full-screen icon from your superimposed UA-cam window, while I'm watching this video, IN FULL SCREEN.
An excellent video.
Shows how much one faulty chip can take down a whole PC.
and not even a faulty die, but a faulty package. Actually two of them.
How did one machine got two cracked chips while everything else survived is a mystery to me at least
I love seeing the snow! Timing all the video writes is/was an art form to make it only happen during VBl and Hbl!
33:01 you should use a die grinder to open up the package ! a gold wire is probably loose
We had an issue on a dead channel on our pick and place machine. When I pulled out the card and desoldered the shift register, some of the pins were also dodgy like that.
It was clear someome changed it, and reused some chips.
If the Book8088 swapped places with the Hand386 (and they produced a modern 386 laptop), I'm sure they'd sell a lot more of those
EDIT: turns out they did. It's called the Pocket386
on one hand I really want these machines and on the other it's hard to justify a few hundred bucks apiece. but they are certainly cool.
Yes! I've been waiting for this from the second channel video
Love this! I did 8088 assembly language for 20 years, also i have seen slow scrolling and fast scrolling, i forgot why my last 8088 was a tandy 1000 that had the pcjr video
The box is magic! It deserves its own channel where you out random broken hardware in it and leave it for 2 weeks.
look closely at the 3rd pin bottom right. you mentioned in the vid that it was "longer". I suspect it had been mechanically stressed when being removed previously.
The two power cables at 16:05 may be speaker cables?
Good content man,🤔the whole channel.👍 😡So that means don’t stop making more of it, or else!!!👀😳 Sorry bout all that, I’m working on it.👀🤯
The three big Chips are "Atmel ATF1508" CPLDs, shortly said just bigger GALs/PALs. I think it would be fun to just try to read them with a compatible Chipreader, maybe the lockbits are not set, so you can get the code out of them. I worked with them on my job and even the JEDEC map looks like a map from a GAL16V8 its just a lot longer ^^
Finding that one dodgy pin was amazing. Nice!
Adrian, have you shared, or would you be able to share, a list of what you've got on your magic CF card full of things? It would be great to be able to self-assemble a similar box of tricks for booting older PCs!
At the Revision 2024 demoparty, we had someone bring us a demo on a Book8088. Because there was no output to capture from, we recorded it in the back of my car with my smartphone, so that’s what went on the big screen. Fun times 😊
Hopefully if someone brings another one next year it will have this mod to give it a video out that we can capture from
what was the name of the demo?
@@GloriousCow Name is Dream Forge - Unleashed Freedom by Freedom Systems if youtube eats the pouet link
Book 8088v2 has RS-232, Parallel, and VGA.
I just wish it had a keyboard port and it would be pretty awesome
That was kind of an interesting failure, after you went through the effort of actually hunting for the bad signal (and not just replacing the offending chip and calling it a day). Thanks for that, much appreciated!
i love watching this guy
I made my own XTish 8088 machine based on a lot of Serges designs and I used his BIOS so I'm very familiar with that beep!
You have a cozy basement there. Makes you wanna go and spend a long winter night looking at gadgets and parts😎🤓
The demo gods, repair man syndrome, murphy, they're all fighting against you in this. Love it! Thanks for all you do!
This was a more pleasurable experience than my last "3rd Date" I'll leave the money on the night stand. Thanks so much. You RoCk!
Great video Adrian. I totally agree with you that machined IC socket adapters are the best.
Concussive maintenance for the win.
I remember writing software for old MDA and CGA, instead of using the really bad BIOS and DOS stuff for the displays I wrote my own. The CGA would show static if you didn't wait before writing which slowed it down a LOT. When a CGA would scroll the screen would blink in the most annoying way. A little bit of snow was better than the blink. I mostly used MDA video as CGA was so bad. It was fun writing PC software back in the days where there was almost no software for it so you had to write everything. I hope people can use these modern 8088 type machines to get a feel what it was like back then!
The slow scrolling is caused by the bios, it may be trying to avoid snow while updating the screen, and/or redrawing the whole text screen (instead of using the hardware scroll and drawing only a new line at the bottom every frame).
Are you able to test out ELKS running with this and CCGA, and try to get NX or some micro X implementation running?!
Also will these work with an 8087?
I first ran ELKS on my Amstrad PC1512SD. Ran pretty decently even with 512kB ram.
I don’t remember whether I attempted to run X on it. Probably would have been rather painful though.
@@DerekWitt “no pain no gain” haha
If you carefully look at the Harris chip, it seems like the two legs next to the broken leg are not aligned, like there was some kind of delamination with the plastic package. Broken bond wires inside ?
Pretty cool to see peeps tinkering with these. I got a v2 and the add-in video card (CGA to compliment the provided VGA in my case) and it's been a fun tinker toy for all things XT. I ended up ripping out the buzzer and running a wire from the speaker out through a 100ohm resistor and some diodes to the analog out of the YAC512 to get PC speaker though the built-in speakers and line out. Believe it or not it works surprisingly okay...Though I did also add a volume slider which I'm kind of surprised they didn't fit in the original design as well...Much needed in my case.
That bodge nest is hilarious. I love it and hate it at the same time.
Excellent as always! Thank you.
Excellent stuff. I need to dig out my Sinclair PC200.
From the datasheet of the Atmel CPLD.
"The ATF1508AS also supports the growing need in the industry to support the new Peripheral Component Interconnect (PCI) interface standard in PCI-based designs and specifications. The PCI interface calls for high current drivers, which are much larger than the traditional TTL drivers."
So you seem to have succeeded in buffering the CGA output with a device with poorer drive capabilities (74LS) than the source device :-)
Imagine being the person who digs up this machine in 40 years and is like "what is is with these bodge wires, what kind of maniac was this?"
I know it's exactly what I would say looking at it!! (Probably at my own work too!) I should put a little note inside saying what it is.
@@adriansdigitalbasement
If you are going to lug it around I recon either the wire will tear itself off or the SMD spider is going to break somewhere in the most inconvenient of times. That always happens to be it seems.
Perhaps it might be a good idea to order a custom PCB and dremel the DE9 into the case if you happen to have any spare time for that.
Admittedly I've done my share of haphazardly soldered bodge-nests and paid the price of extreme inconvenience for that
@@adriansdigitalbasement In 40 years people will discover this video, and they'll be screaming at their trans-meta zuckerborg implants about how you're "destroying history" of these incredibly rare reproductions of the first computer! Less than 5000 were ever produced, and only 10 survived!
"Today on Adarak-57's Quantum Hobbyspace, I am returning this Book8088 to factory spec"
@@adriansdigitalbasement Maybe a small circuit board for the 74 series logic chip with the correct layout would be a good idea? But who could make such? 😁
With that neon orange soldermask there was a concerning moment when I thought this entire thing was a weird flex PCB. Thankfully it's just an odd color choice.
Oh My Circuits!!!! dat bodge tho...
It was very cool literally getting to see that chip fail on boot up. You get so used to seeing things in nondescript boxes, and you forget how complex they are on the inside, and then you get to see literal signals moving along pins. It's awesome!
Your job is impressive!
"it says F Zero" I don't know why Adrian's disappointed that's a great game 😄
I don't think any bumping makes those ICs come out of the massive socket. they probably are not fully pushed in during assembly, ...
Another option you could do for your protection circuit would be to go to pcbway and make a small PCB for just that chip. Then use 0 ohm resistors or jumpers to connect the cable. Put the pcb in the cable and 3d print an enclosure.
Agreed. Actually I more or less successfully fitted a PCB with a PCB-mountable d-sub connector inside the normal plastic enclosure once. I did have to sand the backside of the PCB a bit though.
But it also seems to me that there is just about enough space to install the connector on the laptop's housing, and PCB can just be hot-glued inside then.
The PCB could also have castellations to solder directly onto the board where the resistors would go.
@@nurmr true, but that requires a lot more precision.
I wonder if you could grind the top of that chip down to get to the metal frame next to that pin and fix it. Hopefully not a dodgy bond wire to the silicon. I guess that only matters if it's a super rare chip though.
Would be interesting to see where the physical failure point in that IC was. Maybe a break in the lead frame, or even one of the bonding wires right inside it. Unfortunately you'd probably need to use an x-ray, or a de-capping compound to remove the epoxy without damaging the bonding wires.
AliExpress does indeed have a VGA version of the Book8088... but they also have the Pocket (or Hand) 386. Which is a 386SX. I gather its 8-bit ISA expansion port is compatible with the Book8088's, and has an addition expansion for 16-bit ISA. That one rather interests me.
The Version 2 is VGA with external port and has replaceable video cards, 3 options. They have also released the Pocket 386 that uses the same laptop format, with VGA, and full 16 bit ISA breakouts and a external bord to use them. It comes with a PS2 and VGA port cable.
Can you try resolder inside with a hot air gun? Making press and put hot air to the capsule.
bootup tune is the "Intel Inside" sting jingle - ua-cam.com/video/-ihRPi4wcBY/v-deo.html
play it in reverse
Nice videos! What kind of ring is that you wear?
Is that startup beep sequence the old Intel jingle? Sure sounds like it.
Nice fix, and mod, Adrian :)
But why don't you install the 9-pin connector into the back of the computer, just where the cable comes out, not to have a fragile cable and connection loosely hanging out there?
Great show!
Nice haircut Mr. Black this style makes you look nice
0:41 So the video is both success and failure until you open it? What if the box meows?
Then watch out for the quantum-entangled bottle of poison inside! 🤣 (Physicist jokes.)
Adrian - lots of the links in your description dont work in the USA (ebay and amazon) and a few more links would be cool -- I noticed you have a hot air reflow kit on the shelf, do you like it, what is it since i'm in the market for one to replace some USB-C Plugs on some thinkpads :)
I'm going to have to check my original IBM CGA card out here in a bit on my 5160. I don't recall it being *that* snowy or slow. Huh. I need to plug in the RLL HDD in it for it's 6mo spinup exercise and repark anyways.
Diode testing the pins on the IC in regards to GND/VCC would probably show a disconnection on pin 5.
"brown is just dark orange" .. I see you watch Technology Connections, too?
So what is under the stickers on the 3 main chips? Are they FPGAs?
I noticed that when you were seeing very slow scrolling, there was no flicker. My guess is the BIOS you are using is waiting for VBLANK before accessing VRAM.
Perfect! 😊
I still haven't finished the video so I don't know if you solved it, but I can confirm DIR shouldn't be that slow even on a XT with CGA.
The only times DIR is so slow is when in the BIOS the "system bios cache" and "video bios cache" options are disabled, but that's on AT machines, I don't think something previous to 286 has system bios cache or shadow or any of those options.
I just realized that boot-up beep sequence is the intel jingle
Yeah as soon as I heard it I hummed along. Lol who can forget the Intel jingle.
@@hi-friaudioman well, embarrassingly enough, apparently at least I did!
thanks for reminding!
Good catch!
Hah! Never heard it from a piezo buzzer before but now that you mention it, it sure does sound similar!
So terribly off-tune though.
I was just reminiscing with a friend last week and I mentioned that I never see anybody using a DIP break-out clip when probing systems and was thinking about seeing if I could find one to send to Adrian but here he's finally using one.
I was waiting for you to declare your desk the Bermuda Triangle
From my old days, Harris components always had an impedence difference. just touching the probe on the pin will load the line a bit more and give the impression all is good. Even if you touch with your finger, it will load the line enough.
Great video!
Like old computers! Give a "flap" with hand to work! I remember my CRT with pinksh color, give a "slap" on top to fix!
the big IC that you see are probably cPLD
they are like mini-FPGA and have advantage to have many models that still work in 5V
I guess it goes to show that Reduce Reuse Recycle doesn't always work out (specifically the Reuse part) given that you don't really know what kind of life the ICs involved have had prior to being reused, that pin could have suffered all kinds of thermal stress over the years and being extracted, straightened out, polished up and shoved into that Book8088 was what nailed its' coffin shut, but at least it wasn't a fake, not that it's much solace given it's no good... :P
would cooking the bad chip in an oven fix anything ?
thinking of rebonding or melting away the drt/impurity
This reminds me of the movie "Disclosure"... one of the problems they had with their CD-Rom units was that the chips were being pushed into the boards by hand, thus bending many of the pins...
heck i thought you put the metal on the screw driver as a pointing device lol .
You should dremel the DIP's epoxy away near that pin 5 and see if the leg is just cracked internally, sometimes they can be resoldered at that level.
30:39 Imagine if one of the LEDs on the POST card died, and it said "FU"
I wonder how much of a deal they got on those chipsets. I would have thought an fpga implementation of the system would have made for an even cheaper board (while still using physical processors for that "authenticity").
I was viewing and the 8088 book version 2.0 includes a VGA card.
I wonder if you could hack a parallel port onto one of these? Might make a nice XM1541 unit :D
I like the Intel Inside post beep. That's a nice touch.
except ironically inside was actually NEC v20
@@jwhite5008yeah it's kind of silly to me.
First PC I owned was an 8088 no HD, 640Kb ram, 12Mhz. Just did a Socket A AMD Athlon retro, and am about to play around with a Slot 1 PIII have 3 MB's two I never even built PC's with. They are NIB as was the Socket A Soyo MB I just used. And I still have the first HD complete with mounted controller card for the 8088, it was 32MB. still have the 8 bit ram sticks.
There's now a Pocket 386 listed on AliExpress which is advertised as having an IPS screen and VGA. Looking at the the few videos available on UA-cam, it does look like the screen has significantly better contrast and is also bigger. Probably more interesting to a wider audience, although the 386 SX-40 isn't exactly breathatking fare, deemed a glorified 286.
On the quality of this I have had 3 Book 8088 and that is the only one that had an issue. I also have a Hand386 that works great. My Book386 (New product) is on order.
Did they replace this faulty unit for you? Wild to think the whole issue was just a dodgy V20 and a faulty 82C88! Likely both super cheap parts!
I see as well that Book386 appears to have a 16bit ISA connection on the back, along with some other ports. Plus a 4:3 mode for the LCD. I hope the quality of the LCD was improved substantially. I still say it would be amazing if the same person made some micro ATX motherboards with ISA slots and the same 386SX stuff onboard. A brand new 386SX motherboard that fit into a modern ATX case would be super cool!
@@adriansdigitalbasement They did replace the faulty unit. They allowed me to keep the bad one. I am glad to see it working. I thought it would have been a waste to not get that one working. It is good to see if fixed.
@@adriansdigitalbasement I will let you know how the screen is on the Book386 when it gets here in a couple of days. I hope it is better, but I figure it could not be much worse.
To be fair, the manufacturer can only source ICs from the market, and kind of trust that suppliers don't deliver dodgy parts, which today has become really hard for older components.
Is it possible to do a composite CGA mod on this machine?