Single Disk CDOS Copy procedure

13 views

Skip to first unread message

Marcus Bennett

unread,

Apr 9, 2010, 9:14:35 AM4/9/10

to crom...@googlegroups.com

I just made a test of a procedure to recreate a new CDOS to support 2x5.25 inch drives when the current CDOS

has something like:

A=5.25

B=C=8inch

D=not allocated

This is my CDOS configuration, so if I sent you a diskette it probably has that configuration.

If you had a CDOS with only A: defined then I'm pretty sure that a reference to B: would prompt you to take out the

diskette in A: and place your "B: diskette" into the physical A: drive. But from the above you'll see that the B: is

already configured.

So here is the screen copy of the tested procedure

Note that it failed the first few times at the point when it was writing out A:CDOS For me this was the quality of the diskette

I was formatting, since even passing the INIT.COM it was still faulty.

-----

BEFORE STARTING WRITE PROTECT YOUR WORKING CDOS DISKETTE ! THIS WILL AVOID ANY COCKUPS

A;;;b

Bank 0 > 0 1 2 3 4 5 6 7 8 9 A B C D E F

^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^

Preparing to boot, ESC to abort

Standby

CDOS version 02.54

Cromemco Disk Operating System

A.init271

Initialize Disks version 02.71

Press: RETURN to supply default answers

ESC to abort formatting

CTRL-C to abort program

Warning: INIT can destroy all disk data

Disk to initialize (A,B,C,D)?

**** TAKE OS DISKETTE OUT NOW AND PUT IN YOUR NEW BLANK DISKETTE *****

Disk to initialize (A,B,C,D)? A

Testing:

Index pulses being received correctly

Rotational speed: 310 RPM

Formatting:

Disk type (C=CDOS, X=Cromix)? <C>

Single or double sided (S/D)? <D>

Single or double density (S/D)? <D>

First cylinder (0-27H)? <0H>

Last cylinder (0-27H)? <27H>

Surfaces (0-1,All)? <All>

Cylinder, Surface: 27H, 1

Labeling:

Disk name (up to 8 characters)? <Userdisk>

Date on disk (mm/dd/yy)? <00/00/00>

Number of directory entries (64-512)? <128>

A.dir

*** 0 Files, 0 Entries, 0 K Displayed, 386 K Left ***

**** NOW PUT BACK THE ORIGINAL OS DISK AND RUN CDOSGEN ****

CDOSGEN version 02.54

Cromemco Disk Operating System Generator

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

Single or Dual density <D> ? 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> ? D

Single or Dual density <D> ? 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) <S> ? 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 <A:CDOS> -

**** DONT PRESS ENTER! BUT CHANGE DISK TO THE RECENTLY FORMATTED DISKETTE ****

Enter command file name <A:CDOS> -

Write system boot to drive A (Y = Yes, N = No) <Y> ?

A.dir

CDOS COM 14K

*** 1 Files, 1 Entries, 14 K Displayed, 372 K Left ***

**** try booting from that diskette now ****

Bank 0 > 0 1 2 3 4 5 6 7 8 9 A B C D E F

^ ^ ^ ^ ^ ^ ^ ^ X X X X X X X X

Preparing to boot, ESC to abort

Standby

CDOS version 02.54

Cromemco Disk Operating System

**** Now you should have a working 5.25 B: diskette and put in the original OS into that and copy over all the other utilities ****

B:xfer a:=b:xfer.com

B:xfer a:=b:debug.com

etc

**** note the following command will overwrite the CDOS you just made so dont do it ! ****