It sounds like you have a large collection of interesting stuff.
My machine is similar to yours in that I have a G811 CPU, MAP256(64k) IVC and a G829 Floppy/SASI.
I have three goals;
The first is to get CP/M to recognise the SCSI disk I have connected, it is actually the SCSI2SD emulator set to Xebec mode. I clearly need the Gemini BIOS that had Winchester disk support, and it seems like you have something similar installed on your hard disk.
The second is to archive as much software/firmware as I can as there seems to be very little left out there for these machines. I have been broadcasting on Twitter, Yahoo Groups, Google Groups, Facebook Groups etc. With very little response.
The third is to fix my IVC which appears to be an issue with the IVC 2.0 ROM. The item worked for a while and then the CPU failed, I have swapped the CPU and most signals seem good except the software driven IO line emanating from the CPU. I may have a suitable image from the first 2k of the SVC ROM but have not had chance to test this.
Any help you can offer would be most welcome.
https://glasstty.com/wiki/index.php/...ni_80-Bus_Saga