TRS-80 CoCo 2 RAM upgrade
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- Опубліковано 7 лют 2025
- We upgrade a Tandy Radio Shack (TRS-80) Color Computer 2 from 16K to 64K of RAM. We also play a riveting game of Math Bingo.
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Tandy Radio Shack (TRS-80) Color Computer family
en.wikipedia.o...
Tandy Radio Shack (TRS-80) Color Computer 2
oldcomputermus...
4164 RAM chips
www.jameco.com...
Don't know why youtube recommended this video again, but seems appropriate since Bama is playing my Texas Longhorns this weekend!
Roll ride! 😆
@@fractalMD Saban always wins. :(
@@macrohard007 😀😀😀
Neat to see more people discover the Color Computer and the 6809. Looking forward to more videos from you, and if you appear on CoCo Talk Live or the CoCo Crew, I will make a point of watching/listening.
and now we have indeed CoCo Talked with the Coconuts!
Now you need to find a disk drive and a controller also a multipack interface.
it was Taylor and Amy showed, now it's bigger, better, faster and awesomer. Well worth the effort for a game of math bingo. Really enjoyed the video keep em' coming ;)
Ok, so this is like a typical conversation at our house. Alas, we are not alone.
The Backbit Pro now supports disk images with an adapter. Books for the CoCo exist at the Internet Archive. If memory serves, the CoCo 2 only allocates the additional RAM in BASIC to 32K, BUT reserves the rest for the Extended BASIC chip. There is a way to switch off all ROM (again, if memory serves) so that you can use the majority of RAM for your own purposes. You might see that for OS/9. I don't remember. A certain amount of RAM will be reserved for the screen, for the stack, and maybe for other OS related stuff.
Great video, very informative and amusing. I shared this in the CoCo Discord server so people can check it out. Keep up the good work.
31k is about normal for BASIC, 16k is used for ROMS and 16k for cartridge space, so it's successfully upgraded to 64k, congrats.
The 64k memory trs-80 from the factory was soldered in. The 16k was socketed from what I read. I have a 26-3027 and it's just like yours. I'm waiting on my chips to come in the mail so I can update mine.
thank you! i couldn't find W1 on my rev a 3026.
thanks for watching!
On the 26-3026 or 26-3027 W1 is located between U6 and U7.
Great video...I'm confused that the chips you put in are listed as 64k so it would be 8x64kb=512kb. Why aren't they 8kb chips (8x8kb=64kb)? What am I misunderstanding? Thanks
This is pretty great. Congrats on a successful install. I happen to be from Mobile, Alabama originally (Roll Tide!) and used that very same "Getting Started with Color Basic" manual as my first real programming guide. I went on to computer science in college and a successful computer programming career. I'll be fifty this year. I was eleven when I started with the TRS-80. You two look younger than me. How did you get sucked into the CoCo world?
Only a few years younger!
RTR
There is also a tool to straighten the legs of the chips.
New subscriber here, great video ;) Thank you, look forward to checking out the rest!
Thanks!!
The instructions for inserting cartridges may seem silly but for the CoCo inserting or removing carts when the power is on can destroy the cart or even the CoCo itself. Most other home computers and game consoles of the era didn't have this limitation (though the Adam had an even worse one involving cassette tapes) so it was worth noting in the manual.
I too break out into showtunes when repairing my old computers
And rightly so!
Hilarious and painful to watch. I felt that RAM chip go in her finger.
I didn't even realize it at first. Taylor is a trooper.
Great video. Probably would have been safer for you and the CoCo to unplug the keyboard. It hurts to stab yourself with those IC pins. Ask me how I know! FWIW, I think you _can_ run Extended Color BASIC on a 16K machine. I think BASIC can only use 32K maximum. The 6809 only has a 64K address space total, including ROM and peripherals. Machine language programs can switch the computer into all-RAM mode to use all 64K (minus the peripheral I/O addresses). Looking forward to more CoCo fun!
Yes, ECB can run on.a 16K machine.
you need to get the ECB rom and then a coco SDC.... that will allow you to play all the games out there on the coco archive for coco 1 and 2.... might also look into the coco vga which would let you connect directly to a hdmi
also get a delux color joystick =) welcome to the coco...
You two crack me up. Heh! 😁
We have fun!!!
When removing RAM chips of this size, you can get a tool that's easier that pulls those small chips. Also, you should be grounded when working on the board.
😊 Fun to watch. Thank you.
I'm about to purchase a Tandy for the games. Is it a pacific model TRS-80 COLOR I need to get for compatibility?
you BOTH are GREAT ....
Nice video! How do you get The RGB video output onto the big screen? I heard composite mentioned also, so is the TV just able to display it with its composite input? I bought a purple retro tink mini 2X because I have a C64G which is a PAL machine and needed to convert it to display. TY for the great content!
The Coco 2 has an RF out (channel 3/4), and _some_ have composite. Either should work.
t--for Trasch LOOL;...baybe after adding more Ram :P
Smart women, do you also know how to cook ?
;o)
Do you?
@@fractalMD Of course I do, I'm French !
(cooking is in our DNA :o)
@@alexabadi7458 All right, you are totally in charge of food, now.
@@fractalMD Is the D4164C 8K or 64K RAM ?
@@fractalMD Ha ha - he fell for that one. Though, as he's French, you might end up with snails or frog's legs to eat.