KLund1 Posted September 30, 2022 Share Posted September 30, 2022 I found an 800 with an OS upgrade that has no identifying labels. I was hoping one of you out there in the Atari community might have an idea. It appears to very very well made. But hand soldered. It is on a OS/B board. The only text on the small card is copyright 1984 Computer Software Services, Circuit side, Comp Side, NW A All the chips are lacquer painted over. Any thoughts? Thanks PS Oh, The whole computer smells musty, old like, like in a basement that no one goes into. I'm going to tear it completely apart, and wash the plastics. but how to get the smell off the PCB's and keyboard. The keycaps have those hard to find graphics stickers on the faces, so I can't wash it. Again thanks 1 Quote Link to comment Share on other sites More sharing options...
reifsnyderb Posted September 30, 2022 Share Posted September 30, 2022 It also has a Fast Chip floating point ROM in it. So, it's two upgrades. I don't know what the daughter board is though. Quote Link to comment Share on other sites More sharing options...
KLund1 Posted September 30, 2022 Author Share Posted September 30, 2022 WOW, That is a good upgrade, and unexpected. Thanks for the exceptional fast reply! Anyone else have thoughts on the small pcb? Quote Link to comment Share on other sites More sharing options...
Rybags Posted October 1, 2022 Share Posted October 1, 2022 How many positions on the switch? Maybe it's a full replacement OS. Do you have the means to transfer files like SIO2PC or something? Quote Link to comment Share on other sites More sharing options...
KLund1 Posted October 1, 2022 Author Share Posted October 1, 2022 The switch has 3 positions. The ROM is soldered to the PCB. I have almost everything from AtariMax to FujiNet Oh, I forgot There are stickers with poke's on them, and other things on the case A very large one says 32767 (isn't this total fre(0) ram with basic installed?) Then smaller stickers Poke 16,64: BRK Poke 53774,112 Random = Peek(53770) Quote Link to comment Share on other sites More sharing options...
AtariGeezer Posted October 1, 2022 Share Posted October 1, 2022 (edited) The daughter board kooks like "The Impossible", I have one of those too ... Edited October 1, 2022 by AtariGeezer Quote Link to comment Share on other sites More sharing options...
+Larry Posted October 1, 2022 Share Posted October 1, 2022 Beat me! Yes, I only remember the Impossible mod for the 800 from CSS. Those are quite rare. AtariGeezer, have you tried very many titles to see how effective it is? Quote Link to comment Share on other sites More sharing options...
AtariGeezer Posted October 1, 2022 Share Posted October 1, 2022 (edited) 47 minutes ago, Larry said: Beat me! Yes, I only remember the Impossible mod for the 800 from CSS. Those are quite rare. AtariGeezer, have you tried very many titles to see how effective it is? I have an older version I think. Think I copied about 10 games or a bit more. It worked ok, but noticed that some software wouldn't work with it installed. Edited October 1, 2022 by AtariGeezer 1 Quote Link to comment Share on other sites More sharing options...
+Larry Posted October 1, 2022 Share Posted October 1, 2022 I've searched a bit for an advertisement for the Impossible (800 version) and found one from Analog #33, Aug '85. Not a great PDF, but legible. Next, I'll look for any added information about the Impossible XL. CSS Ad for Impossible (800).pdf Quote Link to comment Share on other sites More sharing options...
+slx Posted October 1, 2022 Share Posted October 1, 2022 So does „The Impossible“ replace copy protection code according to a built-in database? How else could it work without a modified floppy drive? Quote Link to comment Share on other sites More sharing options...
+Larry Posted October 1, 2022 Share Posted October 1, 2022 There is more written about how folks think it works in this thread: Also, did you watch the YouTube video? You can get a good idea as to how it works from it. Quote Link to comment Share on other sites More sharing options...
KLund1 Posted October 1, 2022 Author Share Posted October 1, 2022 Thanks everyone. After I clean up the system I will give this a try. I read the threads about this. I was wondering what the latest disk version was that would have the most 'library files' in it to be able to 'backup' the 'latest' software. Quote Link to comment Share on other sites More sharing options...
BillC Posted October 2, 2022 Share Posted October 2, 2022 7 hours ago, KLund1 said: Thanks everyone. After I clean up the system I will give this a try. I read the threads about this. I was wondering what the latest disk version was that would have the most 'library files' in it to be able to 'backup' the 'latest' software. 3 Impossible! software disk images and PDF manual available at: Quote Link to comment Share on other sites More sharing options...
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