atod
Experienced Member
Folks,
I'm in the process of bringing up CP/M on my CCS 2422 FDC / 2810 CPU combo. So far, I've hacked up my monitor to correctly receive and transmit Intel hex (to/from RAM) over serial. I'm able to load RAM with CCBIOS (for these cards) and CPM 2.2 image (BDOS + CCP). When trying to enter CP/M from warm boot vector, I get "CPM 61K" then "Drive Select Error"
My problem is my 8" disks are not formatted, so I think all the sector seek read low level ops are failing in BIOS and the Monitor. The disks need to be formatted on a per track basis. Saving myself from developing the format code, I'm trying to use one of CCS's programs that does that job. It's called CCSINIT.COM.
I then load CCSINIT.COM (as hex with correct offset) into 0x0100 (TPA). I jump to it from the Monitor however it's exiting out.
Does anyone know of tricks to get TPA to run even if CCP/BDOS initialization routines haven't completely run? Anyone with code snipits for WD 179X formatting routines?
Thanks
I'm in the process of bringing up CP/M on my CCS 2422 FDC / 2810 CPU combo. So far, I've hacked up my monitor to correctly receive and transmit Intel hex (to/from RAM) over serial. I'm able to load RAM with CCBIOS (for these cards) and CPM 2.2 image (BDOS + CCP). When trying to enter CP/M from warm boot vector, I get "CPM 61K" then "Drive Select Error"
My problem is my 8" disks are not formatted, so I think all the sector seek read low level ops are failing in BIOS and the Monitor. The disks need to be formatted on a per track basis. Saving myself from developing the format code, I'm trying to use one of CCS's programs that does that job. It's called CCSINIT.COM.
I then load CCSINIT.COM (as hex with correct offset) into 0x0100 (TPA). I jump to it from the Monitor however it's exiting out.
Does anyone know of tricks to get TPA to run even if CCP/BDOS initialization routines haven't completely run? Anyone with code snipits for WD 179X formatting routines?
Thanks