While waiting for some stuff to finish up the homebrew terminal I got, I've been cracking open this SWTPC 8212 I've got.

I put some pictures here: https://drive.google.com/drive/folde...cL?usp=sharing Note: one of the pics is the CPU board from my CT-82 terminal, just for comparison. You can tell the difference in soldermask.

The 8212 appears to be basically an upgraded CT-82, produced around 1980. It's physically quite a bit larger than the CT-82 and much more refined/polished. The CT-82 case is flimsy and feels like something made by a hobbyist. The 8212 feels like a corporate grade terminal.

Otherwise I think the 8212 is basically a CT-82 with some upgrades - a larger 12" screen being key (probably what the trailing '12' means). One of the boards even mentions being revised CT-82 board. They both use the same 6802 CPU, have a bus that appears to be arranged the same way. One difference though is the video board has a chip marked 'GRAFIX'. I dumped it:

Code:
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Not sure if it adds actual graphics capabilities or just graphic symbols or something.

Also dumped the two main EPROMs on the CPU board, marked '8224G Ver 1.1'

IC 1:
Code:
:10000000C3DDBE75BE81BF0FBE8EC552BCDBC5B0A1
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IC2:
Code:
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:10067000840F97949696851027DD962D854027D771
:10068000D62FD790848D972D840F979496963B8183
:10069000042710810227C44D27DA9695851E27B7B7
:1006A00096903B9695850127AED690851E26A88DFF
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:1006E00002860239DF31DB32D73224037C0031DE6F
:1006F0003139010E3EDE0F0FA600A10127F47C0068
:10070000120EBDBF1EE6008DD3DE0FA700962D850D
:1007100001261296128106250C0F962D8A01972D1F
:10072000840F97940E390F8D090E26FA8510270134
:100730003F39962D85202608D72F8A20972D8500B2
:1007400039D693CA80D793E601D790E600D791D6E1
:1007500093C47FD793C60FD791D696DE0FC602E714
:1007600000E701D611C003D712D62DCA01D72DC478
:100770000FD794397F001BCE48008D31A700088C1D
:10078000500026F6CE48008D24112713D71D981D42
:10079000971DBDC5B0D6168D8DD61D8D89DE150869
:1007A0008C500026E27C001B26CD7EB97ADF1596A0
:1007B000159B16991BE60039BDBC67CEC7CC8D07CB
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:1007E000313938302C20535754504300FFFFFFFF5E
:1007F000FFFFFFFFFFFFFFFFC5B9C658C657B97A15
:00000001FF
Not quite sure what the issue is with this machine yet. The CRT is kind of messed up and needs a yoke adjustment. It produces a lot of wavy garbage like this: https://youtu.be/hS3QwDXXff0

First guess would be RAM, maybe 6545. I tried hooking up a serial cable to it with breakout box.. no activity or sign of anything going in or out of it.