VillageHamster Posted July 3, 2022 Share Posted July 3, 2022 I recently picked up an Atari 800 that had been massive amount of modifications, I have identified several of the boards, but a few I cannot ( one had an Antenna Attached to it ) 1 Quote Link to comment Share on other sites More sharing options...
vitoco Posted July 3, 2022 Share Posted July 3, 2022 Is that "Frank-8-stain"? Seriously, who owned that beast and for what was he using it? Developer? BBS? Hacker? Pirate? It is amazing! Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted July 3, 2022 Share Posted July 3, 2022 That one board looks like it came out of the 2600 radio controlled joysticks. 2 Quote Link to comment Share on other sites More sharing options...
adam242 Posted July 3, 2022 Share Posted July 3, 2022 The Intec board with the MSM5832RS chip appears to be a real-time clock board. Never seen one of those before. It's a shame how "modified" the case is! In shipping, I presume? Quote Link to comment Share on other sites More sharing options...
Mclaneinc Posted July 3, 2022 Share Posted July 3, 2022 I'd say hacker and or BBS'er...Unlikely to be a coder's machine because of all the mods..Pirates also would have preferred extra ram and drive mods. Quote Link to comment Share on other sites More sharing options...
ivop Posted July 3, 2022 Share Posted July 3, 2022 (edited) 15 hours ago, VillageHamster said: ( one had an Antenna Attached to it ) Which one? Quote This is 128kB RAM. Quote This looks like a 16kB RAM card. NEC D416C is 16K * 1 bit. But why so much logic? There must be more to this. Quote Sorry for the grill. The switches probably switch banks of the card below: Quote This looks like a heavily modified Newell ROM card. Quote This indeed looks like a real time clock, with battery. The MC6821P is a PIA. Quote No idea about this, but there's a 3.5mm jack. Input? (sampler) Or output? Edit: and I hate it when they removed the markings of the chips! Edited July 3, 2022 by ivop Quote Link to comment Share on other sites More sharing options...
phaeron Posted July 3, 2022 Share Posted July 3, 2022 Looks like an Omnimon chip on the personality board. Wonder what that last one is, especially with all of the pots and the mic port. Computer-controlled radio? Quote Link to comment Share on other sites More sharing options...
ivop Posted July 3, 2022 Share Posted July 3, 2022 (edited) 15 hours ago, VillageHamster said: Eight times NEC D416C = 16K * 1 bit Eight times Mostek C014331-09 = 16K * 1 bit Don't know why there are six LS logic chips on the board, but I'm not familiar with the 800 buses. But a 32kB RAM card it is Edit: I suppose 8121 is week 21 of the year 1981 Edited July 3, 2022 by ivop Quote Link to comment Share on other sites More sharing options...
BillC Posted July 3, 2022 Share Posted July 3, 2022 (edited) 15 minutes ago, ivop said: Quote This looks like a 16kB RAM card. NEC D416C is 16K * 1 bit. But why so much logic? There must be more to this. It's an Axlon 32KB card, it has 8-NEC D416C plus 8-Mostek 4116. The Mostek RAM chips have an Atari part# on them as well. Edited July 3, 2022 by BillC 1 Quote Link to comment Share on other sites More sharing options...
ivop Posted July 3, 2022 Share Posted July 3, 2022 (edited) 4 minutes ago, BillC said: It's an Axlon 32KB card, it has 8-NEC D416C plus 8-Mostek 4116. Thanks! We just crossed eachother Edit: But two people coming to the same conclusion is better than one Now what's that last board... Edited July 3, 2022 by ivop Quote Link to comment Share on other sites More sharing options...
ivop Posted July 3, 2022 Share Posted July 3, 2022 (edited) 15 hours ago, VillageHamster said: Some more observations: The blue wire has an A on the silk screen. I suppose that's the antenna? On the right, there's 3, 6, 8, 4, 1, which might connect to the SIO bus. Data Input, Ground, Motor Control, Ground, Clock Input. The white/black and black wire might be for (an extra?) power supply. Jack for direct output on line level? Don't know. It might indeed be an Atari/SIO controlled radio receiver for WEFAX or something like that. Edited July 3, 2022 by ivop added WEFAX Quote Link to comment Share on other sites More sharing options...
BillC Posted July 3, 2022 Share Posted July 3, 2022 (edited) 15 hours ago, VillageHamster said: I recently picked up an Atari 800 that had been massive amount of modifications, I have identified several of the boards, but a few I cannot ( one had an Antenna Attached to it ) One reason for the extra wires is the OS chips are 28-pin 2764 while the sockets are 24 pin, the FAST CHIP is an original 24-pin mask ROM. The card is a RAMROD MMOS from Newell Industries, the manual is available at: https://archive.org/details/NewellIndustriesRAMRODMMOSManual The ROMs are: Newell OSN Rev.F Newell OSN Rev.E FAST CHIP Omnimon Unlabeled- this is probably stock firmware burned to an 8KB 2764 Edited July 3, 2022 by BillC 1 Quote Link to comment Share on other sites More sharing options...
VillageHamster Posted July 3, 2022 Author Share Posted July 3, 2022 Ok, Thanks for the posts! The one big unknown was the Atari 2600 Wireless Remote Base ! It looks like it was de-cased and mounted inside the 800. Yeah, 800 frank-n-stein came to me like this in busted up condition, i will try to dump the roms and see if i can find out what was on them, there was some dev/programming carts in the box, along with a rom programmer. ( for the Atari 800XL ) Quote Link to comment Share on other sites More sharing options...
VillageHamster Posted July 3, 2022 Author Share Posted July 3, 2022 3 hours ago, kheller2 said: That one board looks like it came out of the 2600 radio controlled joysticks. Winnner Winner ! Quote Link to comment Share on other sites More sharing options...
ivop Posted July 3, 2022 Share Posted July 3, 2022 (edited) 6 minutes ago, VillageHamster said: Winnner Winner ! Ah, I completely missed the lower wires. 3,6,8,4,1,2. Oh well, I tried. And the joystick cables were not on the first picture Edit: And the blue wire (2) is obscured by a cap at the top connections as well Edited July 3, 2022 by ivop Quote Link to comment Share on other sites More sharing options...
TGB1718 Posted July 3, 2022 Share Posted July 3, 2022 I found this link for the 32K RAM board https://www.worthpoint.com/worthopedia/atari-400-800-32k-intec-peripherals-1816212932 Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted July 3, 2022 Share Posted July 3, 2022 1 hour ago, VillageHamster said: Winnner Winner ! I expect to fully recognized for my contribution….all you doubters!! ? Quote Link to comment Share on other sites More sharing options...
BillC Posted July 3, 2022 Share Posted July 3, 2022 3 hours ago, TGB1718 said: I found this link for the 32K RAM board https://www.worthpoint.com/worthopedia/atari-400-800-32k-intec-peripherals-1816212932 That is a different 32KB PCB, if you look at the left edge of the component side of the image posted you will see silkscreen indicating the OP's board is from AXLON, INC. Quote Link to comment Share on other sites More sharing options...
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