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Old 6th Jun 2019, 11:56 am   #81
john_newcombe
Hexode
 
Join Date: Apr 2019
Location: Skipton, North Yorkshire, UK.
Posts: 252
Default Re: Gemini 80-Bus System

Quote:
Originally Posted by JohnBHanson View Post
As for a disk, almost any disk with single ended SCSI 50 pin connector will work with the GM829 - I have used a 100MByte disk onto a GM849 (similar) before I wrote the emulator.
It's time to add a hard disk to my Gemini, well sort of. Flushed with the success of booting to a Gotek, with much help from JBH and others, I now have in my possession a SCSI2SD adapter (5.1) ready to be connected to the Winchester port of the GM829 controller.

My aim is to emulate a SASI disk drive for use with CP/M. I am not needing to boot to this disk, just be able to use it.

As you will no doubt be aware I have little knowledge of this stuff, and am looking for a clue as to how to get started.

To try and get a feel for what is required I thought I would add a hard disk to the xbeaver gemini emulator (full config below). This was shown to have been configured in the verbose xbeaver log, but I have no idea how to access this drive.

Included on the xbeaver hard disk image there was a TSHD formatter for a TS-802H Televideo machine, not sure if this is useful to me.

Any thoughts or comments would be most welcome.


Code:
verbose

cpuclock 4

board 0xfe gm813_mmu

board 0x20 gm816_clock
board 0x30 telnetd 3000
board 0x34 printer bxerox beps500 landscape general gbro425 pecker
board 0xb0 gm832 BeaverBoot yellow
board 0xb8 serial_8250 bvrnet ~/beaver/HardDisk
board 0xe0 gm829_floppy -geometry D35.2.10.0.512 ~/beaver/images/GM512_64.DMP ~/beaver/images/GM512_ORIGINAL.DMP ~/beaver/images/DISKUTILS.DMP ~/beaver/images/BLANK_0.DMP
board 0xe0 gm829_scsi  harddisk.dsk

board 0xfb gm833

binload 0xf000 ~/beaver/roms/RPM_2.3.ROM
byte 0f0a8 21 00 f0 #Patch top of ram for RPM

byte 0000 c3 00 f0
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