CP/M sysgen question
dave06a at dunfield.com
Fri Mar 10 06:08:03 CST 2006
> When using sysgen to create a new bootable CP/M disk, does
> sysgen copy the cold start loader, too? I'm trying to do a single-drive
> sysgen with CP/M 1.4 and it reports that it has copied the system tracks but
> the disk won't cold boot.
CP/M provides no standardized way of reading/writing the system tracks, so the
exact method used varies considerably from implementation to implementation.
It might be done by sysgen, it might be done by format (or whatever the low-
level init program is called - this is also not standardized), or it might be done
by a separate utility.
> Also, I am looking for a disk formatting program for the iCom
> Frugal Floppy system.none of the disks I have contain a formatting program
> of any type. I've also tried the two programs in the SIGM archive and they
> both report "drive fail" which isn't right since the drive works.
If these are soft-sector disks, you might be able to read/write them on a PC
with an 8" drive connected. Assuming that works:
- Use ImageDisk to read a disk image and write it back out (essentually copy
the disk) - then delete all the files from it, and you will have an usable "blank".
Read that back in with ImageDisk, and you will have an image that you can
use to create "blank" disks at will.
- If you want a truly blank "fresh" disk, you can try:
- Create a file as big as a disk containing E5's
- Use BIN2IMD to convert this to a disk image which
matches your drives geometery.
- Use IMDU to extract the system tracks from a bootable
- Use IMDU to merge the E5's image to the system tracks
image - this should give you an image of a "freshly formatted"
disk with system tracks - this is assuming your system does
not require any other special high-level format on the disk.
dave06a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
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