2 Feb
2009
2 Feb
'09
10:57 a.m.
On Saturday 31 January 2009 11:56:56 am Allison wrote:
I thought I'd remembered CP/M 3 going up to 32MB (but I could be wrong about
that), which ones go further? I've not ever heard of any going up to 1G
before.
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
Subject: Stack
Depth requirements for CP/M 2.2 CBIOS
From: "ROBO5.8" <robo58 at optonline.net>
Date: Fri, 30 Jan 2009 19:08:49 -0500
To: "'General Discussion: On-Topic Posts Only'"
<cctech at classiccmp.org>
Hello,
I have rewritten my old systems CP/M 2.2 CBIOS to add an IDE Drive.
I've run into a problem that has me stumped. Everything works as long as
I don't try and copy or assemble a large Assembly file (>80KB).
I will be going along fine and then out of nowhere I will see CP/M request
access to Drive "T". My debug info says SELDSK is requesting Drive
0FF00h.
Ok this is easy. CP/M 2.x (2.2 nominal) can only address 16 logical drives
so that's limitation one. Each drive is limited to 8Mb
(65525sectors*128bytes).
If you use one of the CP/M like imperoved work a likes this is less an
issue and logical drives can be much larger (up to 1gb).