Some time back, Jonathan Chapman sent me .IMD images of various SIG/M disks from the estate of Tom Kirk.

I'm working on accessing the contents, but am encountering some issues. Using the ImageDsk tools, I've converted them to .IMG files. Most of these seem to be IBM-3740 format, and cpmtools extracts the files without issue. Others, conversely, are in
another format which I haven't been able to suss.

I've got the files posted at *HUMONGOUS* CP/M:

http://cpmarchives.classiccmp.org/ftp.php?b=cpm%2FSoftware%2FUserGroups%2FSIGM%2Ftkirk

I'd appreciate it if someone more adept than myself could take a look.

--Nathanael
*HUMONGOUS* CP/M Archives

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Nathanael,
These files aren't valid at 43 bytes & 100 bytes.

43 Apr 4 03:49 217.IMD
100 Apr 4 03:49 216.IMD

Looking at the remaining as time permits.

Larry

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I started with the first file 154F83.IMD and created the .RAW and .TXT file.

$ IMDA 154F83.IMD > 154F83.TXT

IMageDisk Analyzer 1.18 / Mar 12 2012
IMD 1.18: 4/08/2021 18:52:56

SIG/M 154 F83



User 2 Vedit 137 + TPM->CPM Convert

SN15009

Required cylinders: 18
Required heads : 1
Data rate : 500kbps
Est. maximum track: 8951 bytes

Possible drives/options to write 154F83.IMD :

3.5" HD 80-track NOTE: *1
Double-step: OFF

5.25" HD 80-track
Double-step: OFF

8" 77-track
Double-step: OFF

*1 Should fit on 360rpm drive, 300rpm drive will leave long end gap.



$ IMDU 154F83.IMD 154F83.RAW /B /E /D >> 154F83.TXT

IMageDisk Utility 1.18 / Mar 07 2012
IMD 1.18: 4/08/2021 18:52:56

SIG/M 154 F83



User 2 Vedit 137 + TPM->CPM Convert

SN15009

IMageDisk Utility 1.18 / Mar 07 2012
IMD 1.18: 4/08/2021 18:52:56

SIG/M 154 F83



User 2 Vedit 137 + TPM->CPM Convert

SN15009

Assuming 1:1 for Binary output
0/0 500 kbps SD 26x128
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5
1/0 500 kbps DD 26x256
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5DE5
2/0 D DE5DE5DE5D D D DE5DE5DE5DE5D D DE5DE5D DE5D D D DE5D DE5D D D
3/0 D D D D D DE5D D D D D DE5D D D D D DE5D D D D D DE5D D
4/0 D D D D D D D D D D D D D D D D D D D D D D D D D D
5/0 D D DE5D D D D D D D DE5D D D D D DE5D D D D D DE5D D D
6/0 D D D D D D D D D D D D D DE5D D D D D D D D D D D D
7/0 D D D D D D D D D D D D D D D DE5D D D D D DE5D D D D
8/0 DE5D D D D D DE5D D D D D DE5D D D D D DE5D D D D D D D
9/0 D D D D D D D D D D D D D D D D D D D D D D D D D D
10/0 D D D D D D D D D D D D D D D D D D D D D D D D D D
11/0 D D D D D D D D D D D D D D D D D D D D D D D DE5D D
12/0 D D D D D D D D D D D D D U D D D D D D D U D D U D
13/0 D D DE5D D D D U D U DE5U U D U D DE5U D D D DE5U D U U
14/0 D D D D D D D D D D D D D D D D D D D D D D D D D D
15/0 D D D D D D D D D D D D D D D D D D D D D D D D D D
16/0 D D D D D D D D D D D D D D D D D D D D D D D D D D
17/0 D D D D D D D D D D D D D D D D D D D D D D D D D D
18 tracks(18/0), 468 sectors (84 Compressed, 12 Unavail)



A possible definition is:

BEGIN COMB Compupro (Viasyn) - SSDD 8" - 256 x 26
DENSITY MFM HIGH
CYLINDERS 77 SIDES 1 SECTORS 26 256
SIDE1 0 1,10,19,2,11,20,3,12,21,4,13,22,5,14,23,6,15,24,7,16,25,8,17,26,9,18 BSH 4 BLM 15 EXM 0 DSM 242 DRM 127 AL0 0C0H AL1 0 OFS 2
END

# COMB Compupro (Viasyn) - SSDD 8" - 256 x 26
diskdef comb
seclen 256
tracks 77
sectrk 26
blocksize 2048
maxdir 128
skew 9
boottrk 2
os 2.2
end

# libdsk
[comb]
description = COMB Compupro (Viasyn) - SSDD 8" - 256 x 26
cylinders = 77
heads = 1
secsize = 256
sectors = 26
secbase = 1
datarate = ED



$ cpmls -f comb -D 154F83.RAW
Name Bytes Recs Attr update create
------------ ------ ------ ---- ----------------- ----------------- -CATALOG.154 2K 11
ABSTRACT.154 6K 40
CPU8080 .BQK 10K 72
CRCKLIST.CRC 2K 5
DIRECT .BQK 4K 30
EXTEND80.BQK 10K 68
F83 .COM 24K 190
F83 .DOC 10K 72
UTILITY .BQK 36K 288

User 2:

Name Bytes Recs Attr update create
------------ ------ ------ ---- ----------------- -----------------
CONVERT .ASM 10K 68
CONVERT .COM 2K 8
CONVERT .HEX 4K 20
CRCK43 .COM 2K 12
CRT .ASM 34K 265
CRT .TBL 6K 48
OLDVEDIT.COM 14K 100
VEDIT .NOT 2K 9
VEDIT8C .LST 16K 116
VEDIT8C .SET 14K 106
VEDIT8CL.SET 14K 108
VEDITZC .LST 16K 116
VEDITZC .SET 14K 100
VEDITZCL.SET 14K 102

User 10:

Name Bytes Recs Attr update create
------------ ------ ------ ---- ----------------- -----------------
154 .05 E.XTE 14K 102

User 13:

Name Bytes Recs Attr update create
------------ ------ ------ ---- ----------------- -----------------

. 14K 102
25 Files occupying 282K, 214K Free.


But, with ONLY 18 Tracks of 77, the Files likely will not extract properly.



I do have the SIGM Volume 154 which has the following files in A1 Disk format:

$ cpmls -f a1 -D SIGM154.RAW
Name Bytes Recs Attr update create
------------ ------ ------ ---- ----------------- -----------------
@SIG/M .154 0K 0
ABSTRACT.154 5K 40
CPU8080 .BQK 9K 72
CRC .COM 3K 22
DIRECT .BQK 4K 30
EXTEND80.BQK 9K 68
F83 .COM 24K 190
F83 .DOC 9K 72
JOIN .ACG 4K 30
KERNEL .HEX 33K 259
META80 .BQK 73K 582
SIG/M .LIB 2K 12
USQ .COM 2K 15
UTILITY .BQK 36K 288
14 Files occupying 213K, 35K Free.

What are your thoughts on proceeding with 154F83.IMD?

Larry

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