On 01/25/2021 09:34 AM, Al Kossow via cctalk wrote: I think I gave it away, but might have a schematic of the adapter card. I will look tonight. As I recall, there were NO IC's on the adapter card. I could imagine a terminator, but those don't usually come as a 20-pin chip. Could it be two 10-pin SIP terminators? Jon

On Mon, Jan 25, 2021 at 7:35 AM Al Kossow via cctalk <cctalk at classiccmp.org> wrote: https://manx-docs.org/collections/antonio/chrisq/Andromeda_Systems_-_DC11_S… The board photo on the second page of that brochure shows U91 populated with an MMI PAL16R8. I have one of these DC11 boards somewhere that isn't in the last place I remember seeing it. I'll try to find it again if I can. It might be the WDC11 version, which does RL01/RL02 RX02 emulation instead of the UDC11 version which does MSCP emulation. I assume the WDC11 would have different N8X305N microcode and different CSR decode PALs than the UDC11 version. Even if I find my DC11 board and can extract the fuse map for the U91 PAL it might not be what you need for a UDC11 board. In any case, it would still be good to archive the contents of any of the programmable parts if possible.