UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Gemini 80-Bus System

john_newcombe · 21st May 2019, 8:49 am

I now have a real 40/80 track floppy connected as drive B: and have been able to copy files across using PIP etc. SYSGEN was less successful.

In terms of using higher capacity drives I was just thinking of trying to create QDDS disk images for use with CP/M. I wondered if these would be supported automatically without any bios changes. I know that CP/M could be purchased in either format, GM512 (DDDS) and GM532 (QDDS), but it may be that each version is specifically tailored to the different drives in terms of DPBs and utilities such as FORMAT.COM.

I am not sure I am capable of making some of the changes you highlighted in the last post, so may end up grabbing a 35/40 track drive in place of my 80 track and turning my attention to adding a hard drive.

21st May 2019, 8:49 am	#71
john_newcombe Hexode Join Date: Apr 2019 Location: Skipton, North Yorkshire, UK. Posts: 252	Re: Gemini 80-Bus System I now have a real 40/80 track floppy connected as drive B: and have been able to copy files across using PIP etc. SYSGEN was less successful. In terms of using higher capacity drives I was just thinking of trying to create QDDS disk images for use with CP/M. I wondered if these would be supported automatically without any bios changes. I know that CP/M could be purchased in either format, GM512 (DDDS) and GM532 (QDDS), but it may be that each version is specifically tailored to the different drives in terms of DPBs and utilities such as FORMAT.COM. I am not sure I am capable of making some of the changes you highlighted in the last post, so may end up grabbing a 35/40 track drive in place of my 80 track and turning my attention to adding a hard drive.