8 Dec
2024
8 Dec
'24
1:42 p.m.
Tony,
Maybe this software catalogue will help you:
https://electrickery.nl/comp/p2000c/doc/PTC_Katalogus.pdf
-Rik
-----Oorspronkelijk bericht-----
Van: Tony Duell via cctalk <cctalk(a)classiccmp.org>
Verzonden: zondag 8 december 2024 19:55
Aan: General Discussion: On-Topic and Off-Topic Posts <cctalk(a)classiccmp.org>
CC: Tony Duell <ard.p850ug1(a)gmail.com>
Onderwerp: [cctalk] Philips P2000C disk format
The quick version : Does anyone know the exact physical and logical disk format used by
CP/M on the Philips P2000C portable computer?
The long version with explanations :
I am having reasonable success transfering files to/from disk images for my Osborne 1A
(using cpmtools) and IBM5155 (MS-DOS, of course using editdisk). And I've even got the
Greaseweazle to transfer those images to/from real floppies. The Greaseweazle still annoys
me in that I know it's capable of a lot more if only I could work out how to do it,
but at least it does something useful
[The less said about floppy disks shedding oxide and/or suffering from 'sticky
shed' the better. I'm spending far too much time dismantling and cleaning
drives....]
Any, I'd like to do the same for another of my machines, a Philips P2000C cp/m
'portable'. My machine is the version with 2 internal 40 cylinder single head
drives (about 160K each, MFM) but I can also plug in an external 80 cylinder double head
drive to handle this machine's other native format (about 640K).
Unfortunately, this machine is not common, and neither cpmtools nor the greaseweazle
software has the formats predefined. I could add them myself -- if I knew what they were.
Things like #sectors/track, sector size, #system tracks, skew, etc.
It's not obviously given in any of the manuals I have, so does anyone know it before I
try to work it out.
Alternatively there are rumours that the P2000C could read/write at least one more common
cp/m disk type. The hardware should be capable of it, sure. Doe anyone know if software to
do something like this exists anywhere for the P2000C. I can't find it on any of the
obvious sites
-tony