[HECnet] PDP-11 RSX corrupted tapes: any progress?

[Jordi Guillaumes i Pons]

Hi Johnny,

> ElMore specifically, I’m looking for an usable COBOL-81 compiler. The one which is not corrupted (cobol_v4_4) is COBOL/C11, not COBOL 81, and even for hobbyist stuff, handling COBOL-74 is a PITA…
> 
> I wrote a tool that can fix BRU tapes. I can't remember if the Cobol-81 tape is a BRU tape. If it is a DOS-11 tape, then you're in for a lot of headaches...

Well, cobol_81_v3_1.tpc looks like a BRU tape. Going thru ‘strings’ it shows:

VOL1BACKUP                           D%B1111001001                             1
   ***THIS VOLUME DOES NOT CONTAIN A HARDWARE BOOTABLE SYSTEM ***
^L@^LB^L
HDR1AUT101.A
           00010001000100 00000 00000 000000DECFILE11A          P
HDR2U0414404144                     M             00                            
AUT101.A
USER1
16OCT90135110
DECN
   ***THIS VOLUME DOES NOT CONTAIN A HARDWARE BOOTABLE SYSTEM ***
^L@^LB^L
USER1
/29NOV88183932
USER1
[001,001]   DECFILE11A  
HEADHEADHEADHEADHEADHEADHEADHEADHEADHEADHEADHEADHEADHEADHEADHEADHEADHEADHEADHEADP

Looks like a BRU-based autoin install kit to me :)

Moreover, the datatrieve 3.3 tape (datatrive_rsx_v3_3a.tpc) seems to be a BRU tape also… I have not checked other files. I remember BP2 2.7 is a DOS-11 tape.

Have you make public your fixing tool? If so, I’ll give it a try…