Having trouble getting my system to boot CPM from the CF card.
I have just the following loaded in my backplane:
4Meg mem. board with 1 pair of chips
Prop I/O card
The Z80 CPU
and the IDE card.
I am using the card options shown on John's S100 page.
John M.'s CPU monitor seems to run fine. When I load a CF card (tried with different cards, same result) and boot
with the monitor "P" command, I get:
CP?M V3.0 Loader
Copyright (C) 1980, Digital Research
BDOS ERR: Perm.
And that's it. There is a "40" display on the IDE card, which I take to mean Sector 40 was being read?
I've not had time to read/in detail all the posts, due to personal circumstances; so I may have missed something.
I have seen mention about options on some of the cards- is there a compendium of all these somewhere for the CPM load?
Trying to find the time to troubleshoot this properly-
Suggestions/ guidance appreciated
I have uploaded the basic images and a short document on how to put these on a CF card with all the necessary tools included. The link is http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder¶m=CPM3-Disk-Images
I have also included modified cpmtools that understand the disk format so you can manipulate the images before writing them to a CF card. I would like to use this thread for questions and suggestions for the documentation. I have not verified the prop images as I did not have any 74LS374's on hand so I could not finish bringing up my prop console board - should be able to do that by the coming weekend. I assume a lot of you can verify whether they work or not. I believe they should. I have verified the serial ones do work.
I am opening another thread for suggestions for going forward. I want to cover how to build and customize the actual cpmldr and cpm3.sys files. I will leverage a lot of what John has done and David Fry will contribute his work on the LBA addressing changes that made this all work.
Let me know how it goes.