15 Dec
2015
15 Dec
'15
1:48 p.m.
What I meant was are they still on 9-track, or some kind of tape-in-a-file disk?
IBM tapes are usually written to AWS format files not the formats (.TAP ?) used by
SIMH...
Some source to extract some versions of these from AWS files (and windows executables) are
in this ZIP file:-
http://1drv.ms/1NS4wuo
Dave
G4UGM
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Chuck
Guzis
Sent: 15 December 2015 17:31
To: General Discussion: On-Topic and Off-Topic Posts
<cctalk at classiccmp.org>
Subject: Re: IBM CMS dumpfile idiocy
On 12/15/2015 07:37 AM, Dave Wade wrote:
The files are in the same format as on disk. The
system just copies
them back to disk. What size are the blocks as I have a "C" utility
that will read the older smaller block size files. You can always
download Hercules and VM/370 ....
Jim, Dave, Peter, Harry et al.:
Thanks for your responses. The customer says that the tape was made
during the 1970s on an S/370 system. He doesn't care about the binaries;
he'd just like the source code files translated in ASCII.
That makes the job quite a bit easier.
The general format of the tape looks like this:
34 x 4101 bytes
1 x 2581 bytes
1 x 87 bytes
1 x 177 bytes
1 x 87 bytes
39 x 4101 bytes
1 x 3515 bytes
1 x 87 bytes
39 x 4101 bytes
1 x 3775 bytes
1 x 87 bytes
62 x 4101 bytes
1 x 1013 bytes
1 x 87 bytes
1 x 1125 bytes
1 x 87 bytes
...
(2 x file mark)
The 87 byte records appear to be the metadata; each block has a 2-character
type prefix. I'll have to sit down and suss the rest out, but the 87 byte
records appear to contain the file metadata. The content of much of it does
appear to be card images--I recognized the first logical record as the travel
table from the "Adventure" game, so I expect that complete source is there.
If anyone gets a lightning strike about this, I can check it out.
Thanks again,
Chuck