DavidMil Posted November 25, 2021 Share Posted November 25, 2021 I'm getting a board from a friend and when I asked him what the Rev level was, he looked at the bare printed circuit board and read 'Rev.- X1R copyright 2-84 manufacture date 8-84'. This is an authentic Atari circuit board and he is a very reputable person. Anyone ever heard of this before? DavidMil Quote Link to comment Share on other sites More sharing options...
+DrVenkman Posted November 25, 2021 Share Posted November 25, 2021 5 hours ago, DavidMil said: Rev.- X1R copyright 2-84 manufacture date 8-84'. That’s a weird, transitional date range - 2/84 is 5 months before Warner sold out, and 8/84 is a month after the Tramiels started running things.’ Further, that designation certainly hints at some kind of experimental or R&D board, not necessarily anything for mass production. Does your friend have any indication or hint what this board might be? Photos? Quote Link to comment Share on other sites More sharing options...
bfollowell Posted November 25, 2021 Share Posted November 25, 2021 What exactly is it a board for? I'm assuming, because of where you posted, that it's 8-bit related, and probably a computer motherboard, but you didn't really say. Which computer or device is the board for? Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted November 25, 2021 Share Posted November 25, 2021 Need pics. Assuming XL board. The only thing I have close to that in my little table is a SECAM board but X1A 4-84. Quote Link to comment Share on other sites More sharing options...
xrbrevin Posted November 25, 2021 Share Posted November 25, 2021 could be anything at this stage... arcade board, console, computer, amy 1090 board, mindlink, medical diag proto ? Quote Link to comment Share on other sites More sharing options...
BillC Posted November 25, 2021 Share Posted November 25, 2021 8 hours ago, DrVenkman said: That’s a weird, transitional date range - 2/84 is 5 months before Warner sold out, and 8/84 is a month after the Tramiels started running things.’ Further, that designation certainly hints at some kind of experimental or R&D board, not necessarily anything for mass production. Does your friend have any indication or hint what this board might be? Photos? Perhaps it is about the 128K 800XL mentioned in the post linked below: Quote Link to comment Share on other sites More sharing options...
xrbrevin Posted November 25, 2021 Share Posted November 25, 2021 52 minutes ago, BillC said: Perhaps it is about the 128K 800XL that would be nice - deconstruct it into gerbers! Quote Link to comment Share on other sites More sharing options...
DavidMil Posted November 25, 2021 Author Share Posted November 25, 2021 5 hours ago, kheller2 said: Need pics. Assuming XL board. The only thing I have close to that in my little table is a SECAM board but X1A 4-84. Sorry, the board has been mailed second day air. So that 'should' put it here Saturday. But this time of year, I'm thinking Monday. I'll take pictures and post them as soon as I get it. I can tell you this: It's for a 1090, but I don't think it ever went to production. As Dr.Venkman pointed out, I think it may have been an R&D board DavidMil 4 Quote Link to comment Share on other sites More sharing options...
xrbrevin Posted November 26, 2021 Share Posted November 26, 2021 12 hours ago, DavidMil said: It's for a 1090 best to let @kenames99 know as he is currently developing a 1090 remake and is very knowledgeable on the subject ? 1 Quote Link to comment Share on other sites More sharing options...
DavidMil Posted November 28, 2021 Author Share Posted November 28, 2021 It came today! Dr.Venkman was correct; this is not a working 1090XL board, but rather a prototype. Even at that, it still can't work as it is. First thing I noticed is that the on/off switch is jumpered out with a trace between the two through hole points on the board. Also the red LED (CR15) is in the middle of the board, just like the schematics at AtariMuseum. The passive components only go halfway down the side of the board, and there are a lot less caps, resistors and inductors on this board. While it's not a working board it is a very unique as most companies usually only make a very few of these proto boards. I'm sorry Ken, that I promised you something that I now can't deliver. Here are the pictures... DavidMil 3 Quote Link to comment Share on other sites More sharing options...
kenames99 Posted November 28, 2021 Share Posted November 28, 2021 hi, though it is not the same I would not say it wont work. I was looking over the photos and see many many similarities. many more then differences. hard to say tho. I would still like to examine it to be sure of some of the mechanical properties like hole and edge connector placement. those are and will be critical for proper reconstruction of the remake board. Ken Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted November 28, 2021 Share Posted November 28, 2021 (edited) The board looks like it can be made to work, though there might be some damage or cosmetic abrasion to some of the track/traces... the s1 issue is not that big a deal, mostly because on the test bench ... your supply has it's own switch, making the pick off points useful isn't a chore at all really. Edited November 28, 2021 by _The Doctor__ Quote Link to comment Share on other sites More sharing options...
DavidMil Posted December 4, 2021 Author Share Posted December 4, 2021 The board is on its way to kenames99. I am very much looking forward to hear what he discovers about it! If I remember right, the 1090XL used the same power supply as a 1027 printer? Anyone know for sure? DavidMil 1 Quote Link to comment Share on other sites More sharing options...
kenames99 Posted December 30, 2021 Share Posted December 30, 2021 yea, that is an actual fact. I believe they even put the pwr supply part # in the 1090XL spec docs. I could be wrong about in the docs but that is same supply for both. Ken Quote Link to comment Share on other sites More sharing options...
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