开云体育What follows is me looking into the mists beyond my actual competence.? However I think
you'll need to go back to however this 'tape' file was created.? It does not look like an AWS
format, nor any tape file format that I know of.
At offset x'c0' I see:
- a read CCW (x'02') of 80 bytes into address x'7c00'
- a TIC CCW (x'08') to x'7c00'
which appears to be a standard IPL process.? This would read the next block into x'7c00', the
data would be one, or more, read CCWs to read subsequent blocks off the tape and then
transfer to continue processing those CCWs to actually read the remaining data. And we can
see these from offset x'5c' onwards reading 80 byte records at locations increasing by 72
bytes (presumably to overwrite the sequence number on the previous 80 byte record).
So what is the rest of the data?? If this was an AWS formatted tape, then the initial x'5000',
x'0000' would mean there was an 80 byte record? following and there were no preceeding
records, however it would be followed by a two byte flag field - presumably x'a000'- this
chunk is an entire record and is not the end-of-file.? In this case it is not - it is followed by
what looks like a sense CCW.
All-in-all it appears to me to be a set of 80 byte card images copied into a V-type format file,
with the record lengths converted from big- to little-endian and ignoring the length of the
'RDW'.? I have no idea why the subsequent x'5000 0000' lengths come in pairs.? Possibly it
was originally written to tape as LABEL=(,NL),RECFM=F,LRECL=80 .
Possibly the only way of IPLing off it would be to reformat into 80 byte records without the
x'5000 0000' full-words - either in AWS format (where they come back as part of the AWS
header) or simply a series of 80 byte records jammed together which could be IPLed off a
card reader - which expects 80 byte records.?? Because the CCWs are 8 bytes in length they
are in S/370 (not z/Arch) format so you would need to, as suggested, IPL in S/370 or
ESA/390 mode.
TAPEMAP will be of no help - at best it is an unlabelled tape so there are no tape header (or
trailer) records.
James Campbell
On 16 May 2024 at 10:05, botongrui, aka τσm. via groups.io wrote:
> Hi Mark,
> Have you tried specifying the ARCHLVL in your config ?
>
> ARCHLVL S/370 | ESA/390 | ESAME | z/Arch
>
> Specifies the initial architecture mode:
>
> - use S/370 for OS/360, VM/370, and MVS 3.8.
> - use ESA/390 for MVS/XA, MVS/ESA, OS/390, VM/ESA, VSE/ESA, Linux/390, and ZZSA.
> - use z/Arch or ESAME for z/OS and zLinux. This is the default.
>
> ---
> τσm
>
> On Thursday, 16 May 2024 at 05:31, mspitz@... <mspitz@...> wrote:
>
> > Thanks for all of the help. Hercules will not IPL the tape, it says it is a s/360 PSW. I'm sure that is correct, and if so, I will try to figure out skip the IPL portion of the tape and then see what I can do.
> >
> > Anyway thanks for all the help.
> >
> > - Mark
> >
>
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