Sunday brain tickler

[Chuck Guzis]

On 01/08/2017 04:42 PM, william degnan wrote:
> Inverse 8085?

I don't think so.  If it helps, here's the first few lines of the
"directory":

000:  00 a1 7a c1 c0 00 00
0007:  00 00 00 00 00 00 00 80 1a 02 38 00
0013:  a1 7a c1 c0 00 00 00 00 1b ff 00 00
001f:  5c 25 15 1b 4c 40 00 00 ff ff 37 05
002b:  94 2f 38 40 00 00 00 00 ff 8f 31 01
0037:  c4 a3 75 6a ab 52 00 00 ff 85 25 05
0043:  94 2f 38 40 00 00 00 00 ff 02 0f 02
004f:  c4 a3 75 6a ab 52 00 00 ff b6 09 04
005b:  94 2f 38 40 00 00 00 00 ff 03 02 03
0067:  c4 a3 75 6a ab 52 00 00 ff 01 12 01
0073:  d0 7f 9f 12 1f bd 53 28 ff ff 7f 02
007f:  c4 a3 75 6a ab 52 00 00 ff 01 2b 00
008b:  c4 a3 75 6a ab 52 00 00 ff 83 28 04
0097:  c4 a3 75 6a ab 52 00 00 ff 01 38 00
00a3:  94 2f 3e 80 00 00 00 00 ff 01 1d 00
00af:  94 2f 4b 00 00 00 00 00 ff 03 35 05
00bb:  94 2f 4b 00 00 00 00 00 ff ff 3e 06
...

There are no other tables on disk. The disk itself is hard-sectored,
with a sector length of 150 bytes and 16 sectors per track.  They're
interleaved 3:1 and grouped into blocks of 1200 bytes.  The directory
would correspond to block 0 and there are 72 entries in it, less the header.

I can get the raw text, but how it's linked together and what file names
might is still a mystery.

--Chuck