32 Basic Programs for the Atari by Tom Rugg.

[+Allan]

I just sector-copied this disk that has all the programs from the book. The first side has a couple of errors. I copied it with Disk Wizard II. Could somebody look at side A and see if they can fix it?

 

https://archive.org/details/32-basic-programs-for-the-atari-computer

 

Thanks,

Allan

 

32_BASIC_Programs_for_the_Atari.zip

[Atari_Ace]

I just sector-copied this disk that has all the programs from the book. The first side has a couple of errors. I copied it with Disk Wizard II. Could somebody look at side A and see if they can fix it?

 

https://archive.org/details/32-basic-programs-for-the-atari-computer

 

Thanks,

Allan

 

 

I took a quick look and didn't see any problems. The sector links seem fine, the VTOC looks fine, and all the files parse as BASIC to line 32768 as expected. That said, only 2/3 of the disk is used, perhaps the problem is in the unused part. Can you be more specific about the errors you saw.

[+Allan]

 

I took a quick look and didn't see any problems. The sector links seem fine, the VTOC looks fine, and all the files parse as BASIC to line 32768 as expected. That said, only 2/3 of the disk is used, perhaps the problem is in the unused part. Can you be more specific about the errors you saw.

I got two CRC errors at sectors 708 and 720.

 

Allan

[Atari_Ace]

I got two CRC errors at sectors 708 and 720.

 

Allan

708 contains data from a deleted copy of DIFFEQN, we can restore the data from sector 255 of side B and then fix the sector link if we want that degree of fidelity. Comparing the two sectors, it appears bytes $2E-$7F are the ones that are damaged.

016190: SECTOR: 708: FILE:
     0  17 00 00 00 00 25 0e 40-20 00 00 00 00 24 87 25   .....%.@ ....$.%
    10  0e 3f 50 00 00 00 00 2c-16 fc 03 2d 0f 36 8b 2d   .?P....,...-.6.-
    20  0e 40 42 00 00 00 00 14-15 07 86 20 88 1b 24 22   .@B........ ..$"
    30  08 00 80 00 00 00 04 00-01 00 05 02 40 14 20 08   ............@. .
    40  22 4a 40 20 08 44 00 04-00 04 65 80 d0 00 00 00   "J@ .D....e.....
    50  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................
    60  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................
    70  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................
007f10: SECTOR: 255: FILE:
     0  17 00 00 00 00 25 0e 40-20 00 00 00 00 24 87 25   .....%.@ ....$.%
    10  0e 3f 50 00 00 00 00 2c-16 fc 03 2d 0f 36 8b 2d   .?P....,...-.6.-
    20  0e 40 42 00 00 00 00 14-15 07 86 20 88 1b 21 36   .@B........ ..!6
    30  8a 2d 0e 40 17 00 00 00-00 14 2d 36 8b 2d 0e 41   .-.@......-6.-.A
    40  01 70 00 00 00 16 06 04-21 09 07 86 21 89 1b 15   .p......!...!...
    50  36 8a 2d 0e 40 37 00 00-00 00 14 21 36 8b 2d 0e   6.-.@7.....!6.-.
    60  41 01 70 00 00 00 16 10-04 34 08 20 85 15 14 1a   A.p......4. ....
    70  2d 0e 40 16 00 00 00 00-12 0e 40 23 00 21 00 7d   -.@.......@#.!.}

Sector 720 on the other hand is normally unused since it's inaccessible to DOS. I doubt the loss is interesting. Assuming the bitrot is similar to the above, I'm not sure there's anything meaningful to restore here. Sector 720 on side B is just 128 $1A bytes.

​016790: SECTOR: 720: FILE:
     0  00 00 00 01 21 87 01 20-01 00 20 40 64 44 60 00   ....!.. .. @dD`.
    10  00 10 00 01 80 00 72 02-00 24 20 14 b0 00 17 09   ......r..$ .....
    20  40 08 00 00 00 22 08 80-00 00 00 00 00 00 00 00   @...."..........
    30  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................
    40  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................
    50  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................
    60  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................
    70  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................

[+Allan]

 

708 contains data from a deleted copy of DIFFEQN, we can restore the data from sector 255 of side B and then fix the sector link if we want that degree of fidelity. Comparing the two sectors, it appears bytes $2E-$7F are the ones that are damaged.

016190: SECTOR: 708: FILE:
     0  17 00 00 00 00 25 0e 40-20 00 00 00 00 24 87 25   .....%.@ ....$.%
    10  0e 3f 50 00 00 00 00 2c-16 fc 03 2d 0f 36 8b 2d   .?P....,...-.6.-
    20  0e 40 42 00 00 00 00 14-15 07 86 20 88 1b 24 22   .@B........ ..$"
    30  08 00 80 00 00 00 04 00-01 00 05 02 40 14 20 08   ............@. .
    40  22 4a 40 20 08 44 00 04-00 04 65 80 d0 00 00 00   "J@ .D....e.....
    50  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................
    60  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................
    70  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................
007f10: SECTOR: 255: FILE:
     0  17 00 00 00 00 25 0e 40-20 00 00 00 00 24 87 25   .....%.@ ....$.%
    10  0e 3f 50 00 00 00 00 2c-16 fc 03 2d 0f 36 8b 2d   .?P....,...-.6.-
    20  0e 40 42 00 00 00 00 14-15 07 86 20 88 1b 21 36   .@B........ ..!6
    30  8a 2d 0e 40 17 00 00 00-00 14 2d 36 8b 2d 0e 41   .-.@......-6.-.A
    40  01 70 00 00 00 16 06 04-21 09 07 86 21 89 1b 15   .p......!...!...
    50  36 8a 2d 0e 40 37 00 00-00 00 14 21 36 8b 2d 0e   6.-.@7.....!6.-.
    60  41 01 70 00 00 00 16 10-04 34 08 20 85 15 14 1a   A.p......4. ....
    70  2d 0e 40 16 00 00 00 00-12 0e 40 23 00 21 00 7d   -.@.......@#.!.}

Sector 720 on the other hand is normally unused since it's inaccessible to DOS. I doubt the loss is interesting. Assuming the bitrot is similar to the above, I'm not sure there's anything meaningful to restore here. Sector 720 on side B is just 128 $1A bytes.

​016790: SECTOR: 720: FILE:
     0  00 00 00 01 21 87 01 20-01 00 20 40 64 44 60 00   ....!.. .. @dD`.
    10  00 10 00 01 80 00 72 02-00 24 20 14 b0 00 17 09   ......r..$ .....
    20  40 08 00 00 00 22 08 80-00 00 00 00 00 00 00 00   @...."..........
    30  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................
    40  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................
    50  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................
    60  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................
    70  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00   ................

Thanks Atari_Ace. I just wanted to make sure there wasn't any damage that was effecting any of the programs before I post them to Atarimania. Since they programs themselves seem fine, there's no point in changing anything.

 

Allan