21 Jun
2014
21 Jun
'14
9:55 a.m.
I don't recall seeing the 8271 used or refenced
in any of the CP/M releases. I thought they all used
the bios code.
The originals would have used the two card SD controller
as in MDS800 not the series II 8271.
Even so, I thought they used the bios calls and not directly
to the controller.
Maybe it is just brain fade on my part.
Dwight
Date: Sat, 21 Jun 2014 03:11:51 -0600
Subject: Re: image of CP/M disk for Intel MDS wanted
From: spacewar at gmail.com
To: cctalk at classiccmp.org
On Sat, Jun 21, 2014 at 12:32 AM, Chuck Guzis <cclist at sydex.com> wrote:
This archive claims to have both SD and DD
Intellec images of 62K CP/M:
http://www.z80.info/sample_disks/Intellec.zip
That's interesting, but it's all stuff that's been modified to run on some
Z80 simulator, not on the real MDS. There's a claim that their CP/M double
density image *might* run on real hardware. Their SD image definitely
won't unless the MDS has the optional two-card SD controller, rather than
the MDS' built-in 8271 controller. I believe the original DRI disk should
run with the 8271. Hopefully someone somewhere has saved a genuine DRI
disk.
If all else fails I can hook up a logic analyzer to my MDS to figure out
where things are going awry.