toiletunes Posted December 28, 2015 Share Posted December 28, 2015 Is there a picture guide to board revisions? If not, here's a start. A1 serial# with Expansion Interface, PCB says REV A. If your PCB is different, please post pics. Quote Link to comment Share on other sites More sharing options...
DrVenkman Posted December 28, 2015 Share Posted December 28, 2015 My sole 7800 is an AT-84 unit. Same revision to the board, which looks identical except for the color of the potentiometer dials and the manufacturer's labeling on some of the chips. 1 Quote Link to comment Share on other sites More sharing options...
toiletunes Posted December 28, 2015 Author Share Posted December 28, 2015 Thanks! I see two differences: On the right-hand column of chips, I have an extra chip. On the next column over, our chips are different dimensions. Any tech guys know what's up? Quote Link to comment Share on other sites More sharing options...
CPUWIZ Posted December 28, 2015 Share Posted December 28, 2015 My sole 7800 is an AT-84 unit. Same revision to the board, which looks identical except for the color of the potentiometer dials and the manufacturer's labeling on some of the chips. IMG_3117.jpg Wow, every single chip, including the BIOS is socketed, not sure I have ever seen that before. Cool. EDIT: I would post some of mine, but they all have been dicked with in one way or another. Except maybe one. Quote Link to comment Share on other sites More sharing options...
DrVenkman Posted December 29, 2015 Share Posted December 29, 2015 Thanks! I see two differences: On the right-hand column of chips, I have an extra chip. On the next column over, our chips are different dimensions. Any tech guys know what's up? Well, the difference in "dimensions" is really just that mine are socketed and yours are soldered straight to the board. Those three chips (RAM and BIOS) still look to be 24-pin DIPs. As for the extra chip on the right column, I'm pretty sure that's basically system "glue" logic. It's certainly not the main system RAM, BIOS, I/O or any of the CPU (6502) and video (MARIA and TIA) chips. You say yours is a Rev A but what is the part number? Here are the markings on my board: Quote Link to comment Share on other sites More sharing options...
+Mitch Posted December 29, 2015 Share Posted December 29, 2015 As far as I have ever seen, there are two NTSC board revisions and one universal board that was only shipped in a PAL format. There may be an early PAL only board but I have never seen it. I hope my website can handle the bandwidth. Mitch Quote Link to comment Share on other sites More sharing options...
toiletunes Posted December 30, 2015 Author Share Posted December 30, 2015 CO25233-002 REV A action upc A 1787 solder side Atari, Inc. copyright 1984 Quote Link to comment Share on other sites More sharing options...
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