DECmate II disk image tooling?
Vincent Slyngstad
vincent.slyngstad at gmail.com
Sun Mar 13 10:32:09 CDT 2022
On 3/13/2022 7:57 AM, David Schmidt via cctech wrote:
> Good point about the CP/M disk - actually it is read just fine with
> cpmtools with this diskdef:
>
> # PRO CP/M RX50 DZ format (Perhaps only 79 tracks should be used?)
> diskdef dec_pro
> seclen 512
> tracks 80
> sectrk 10
> blocksize 2048
> maxdir 128
> skew 2
> boottrk 2
> os 2.2
> end
>
> So I'm left with figuring out how to pull files off of 12-bit OS/{2}78
> disks.
If you can extract the byte stream from the IMD/IMG files (and
de-interleave them if necessary into logical order), I have tools to
read the OS/8, COS, etc. file-systems.
The tools want essentially a 16 bit short for each 12 bit word, in
logical order. I think this is essentially what you get for the
"inefficient" 12 bit mode. I also have tools to unpack some of the
interlaced 8-bit formats for RX01/RX02, and those tools may be adaptable
to the RX50.
Vince
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