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CDOSGEN was the answer

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  by Bill Degnan - 04/09/2010 09:45
The problem was not the drive or the controller it was the CDOS gen. It was set to boot from a 5 1/4" drive as A, but the B drive was expected to be an 8" disk.

I needed to use CDOSGEN to generate a CDOS that expects the B drive to also be 5 1/4"

Thank you to the Cromemco Google User Group (Markus and Mike) for the tip about CDOSGEN:
http://groups.google.com...hread/9f180f5f17b7a009#

-------------------------
First I made a backup of my only 5 1/4" disk:
After booting to RDOS and at the ; prompt:

(assume Return at the end of every line)

A;;;
S0 (that's s0 "zero" not sO)
RD100 S7E00 1
[INSERT BLANK FORMATTED DISK "BACKUP DISK"]
S0
WD100 S7E00 1
[INSERT ORIG DISK]
SE
RD100 S7E00 1
[INSERT BACKUP DISK]
SE
WD100 S7E00 1
[INSERT ORIG DISK]
S1C
RD100 S6C00 1
[INSERT BACKUP DISK]
S1C
WD100 S6C00 1
S0
B (to boot CDOS to new disk)

then I ran CDOSGEN.
---------------------
CDOSGEN (from MARCUS of the Crom group:)

Here is a sample session with CDOS 2.54

CDOSGEN version 02.54
Cromemco Disk Operating System Generator
Copyright (c) 1978, 1982 Cromemco Inc.

Memory size (3FFF through FFFF or 16K through 64K) ?

Drive A type (S = Small, L = Large) ? s
Seek speed (1 = 6ms, 2 = 12ms, 3 = 20ms, 4 = 30ms) <1> ? 1
Single or Double sided ? d
Single or Dual density ? d
Drive B type (S = Small, L = Large, H = Hard, N = None, E = End) ? s
Seek speed (1 = 6ms, 2 = 12ms, 3 = 20ms, 4 = 30ms) <1> ? 1
Single or Double sided ? d
Single or Dual density ? d
Drive C type (S = Small, L = Large, H = Hard, N = None, E = End) ? e

Function key decoding
(S = Standard, N = None, U = User, F = File) ? n

CDOS addresses:
Starting address of CDOS (top of User Area) C700
Starting address of I/O device drivers F944
Last address used by CDOS FF41
Top of memory for this CDOS FFFF
Size of CDOS 38AC
Size of boot loader (maximum = 1A00) 190B

Enter command file name - CDOS

--------------
To test type CDOS [return] with the new disk in the drive.


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