TemplarXB Posted April 27, 2020 Share Posted April 27, 2020 I finally purchased an 800 after having an 800xl for the last few years. I just opened it up and am confused by the board setup (see attached photo). There are three 16K cards but one of them has been modified and is wired directly to the OS card which also has some kind of mod on it. Any idea what this is? I bought it without a power supply so I haven't been able to boot it yet. 1 Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted April 27, 2020 Share Posted April 27, 2020 8x41256 DRAM's on the right card, so this would be a 256KB memory board. Maybe others can comment whether it uses the AXLON or MOSAIC banking methods. It seems most plausible to be of AXLON type, if the right board went into the middle memory slot, so: CPU board at the front, 16KB board, 256KB board, 16KB board at the back. For a total of 288KB of RAM. 16 banks of 16KB selectable in the $4000-$7FFF window. 3 Quote Link to comment Share on other sites More sharing options...
TemplarXB Posted April 27, 2020 Author Share Posted April 27, 2020 Thanks for clearing that up Nezgar. That memory card was in the middle slot. Now hopefully the system works when I get a power supply! Quote Link to comment Share on other sites More sharing options...
ClausB Posted April 28, 2020 Share Posted April 28, 2020 Looks like a variation on the David Byrd mod. Quote Link to comment Share on other sites More sharing options...
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