Prime MAGSAV format?

[Chuck(G)]

Any old PRIME/PRIMOS hands here?

Does anyone know the format of a MAGSAV file? I can figure out some of the fields, but a complete description would be most helpful.

TIA!

 

[geneb]

Chuck, is that a Pick derivative?

g.

 

[Al Kossow]

Any old PRIME/PRIMOS hands here?

Does anyone know the format of a MAGSAV file? I can figure out some of the fields, but a complete description would be most helpful.

TIA!

try comp.sys.prime or cctlk

there are still Pr1mates around there

 

[Chuck(G)]

Thanks Al, that was my next step. Worst case, the customer needs only the ASCII files, so pulling those out would be straightforward, (Prime ASCII has high-order bit set in each character).

Edit:

Looks like there's some information here that's relevant.

Prime tapes are a lot of fun, as they don't appear (at least not the stack I have) to use ANSI tape labels--so you're left guessing.

Nothing like non-standardization!

 

[RickNel]

Nothing like non-standardization!

In my part of the world we spell that non-standardisation

 

[Chuck(G)]

Oh, it gets more interesting... I've just finished a tape (written on an unknown mainframe) that contains programs written for a 60-bit Cyber (probably Cyber 170) machine talking to an IBM S/370 via RJE. It's not clear what was done where--or even where the tape was written, as it has no volume or other header information. Just files with varying block sizes (800-10001 bytes, aside from the remnant end-of-file blocks). No clue as to blocking factors (which also vary all over the place). I suspect that the tape was probably written on a mini, but can't be sure.

 

[Chuck(G)]

Just an FYI.

Figured out the MAGSAV format and can now restore complete directory trees with file dates and times from a SIMH .TAP image.