RE: [N8VEM-S100:6053] I can boot MSDOS but not CPM3

Dropping bread crumbs, hehe, that's a good way to put it. I use that technique all the time...

From: mon...@vitasoft.org
To: n8vem...@googlegroups.com
Subject: RE: [N8VEM-S100:6053] I can boot MSDOS but not CPM3
Date: Mon, 19 Jan 2015 10:19:09 -0800

Rich, don’t want to sound flippant, but the problem could be a whole range of things. In order to be of some help, need more information. You need to modify the Bios/Loader and drop bread crumbs along the way (I output a single character on the screen at each step) to determine where the problem is.

John

From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Richard Cini
Sent: Monday, January 19, 2015 10:06 AM
To: S100-Post
Subject: [N8VEM-S100:6052] I can boot MSDOS but not CPM3

All —

I gave up on the ZFDC for now since I can’t get it to calibrate properly (I can’t get the separator frequency above 450kHz with a Qume 242 drive connected), so I went back to the IDE board. I first removed the D82C55-5 (NEC version) and replaced with a regular 82C55AC. I made a DOS 4.01 image from the one on the web site and gave it a whirl and it works! Yipee!

However, I can’t get it to boot CPM3. I’m using the “banked-prop” version and the only message I get is “BOOT error.” I’m using a 32mb CF card. Not sure what’s up with that, but any advice would be appreciated.

Rich

Rich Cini

Collector of Classic Computers

Build Master and lead engineer, Altair32 Emulator

http://www.classiccmp.org/cini

http://www.classiccmp.org/altair32

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