[Coco] hybrid CoCo-CP/M disk
goosey at virgo.sdc.org
Tue Jan 16 02:32:17 EST 2007
>Date: Mon, 15 Jan 2007 08:15:51 -0500
>From: Robert Gault <robert.gault at worldnet.att.net>
>After it was pointed out to me that "group" referred to the CP/M disk
>structure, I looked up info on CP/M on the Web. There seems to be as
>many different disk structures as there were computers that used them;
Pretty much. The worst part is that they're not self-describing. You
have to know which disk is which format. Everybody else learned from
CP/M's mistake. Newer formats, like OS-9's RBF and MS-DOS FAT have an
id block that describes the disk's characteristics.
Having two or three different CP/M machines will certainly teach one
to religiously use disk labels. :-)
>10 formats listed just for TRS machines. Which format are you working
Montezume Micro CP/M 2.2 version 1.42. Single side, double density 5.25".
>At least one Coco software package uses the entire track 17. RGB-DOS
>used the last sector of T17 for a disk label. I think some software may
>have stored a copy of the FAT or perhaps the entire directory in the
>latter half of T17.
Well, as I said earlier, my coco "partition" starts at track 17 and
goes to track 34. That was a typo at the start of the thread.
(Why not use the FIRST sector of T17 for a disk label? That's what
I've always wondered.)
Willard Goosey goosey at sdc.org
Socorro, New Mexico, USA
"I've never been to Contempt! Isn't that somewhere in New Mexico?"
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