Need information on DG RDOS "DUMP" format
jackm at ARDC.ARPA
jackm at ARDC.ARPA
Fri Aug 24 21:01:50 AEST 1984
From: Jack Moskowitz (PAD) <jackm at ARDC.ARPA>
>From a very old DG RDOS Reference Manual.
Dump files are formatted into the following types of blocks:
1) Name blocks - 377
2) Data blocks - 376
3) ERror blocks - 375
4) End blocks - 374
5) Time blocks - 373
6) Link data blocks - 372
These formats are given in the following illustrations:
1) Name block
block id 1 byte 377
attributes 2 bytes
No of contiguous blocks only if contiguous characteristic set 2 bytes
filename 10 bytes
terminator (null)
2) data block
block id 1 byte 376
byte count 2 bytes
checksum (wc mod 2 + tot contents all full words) 2 bytes
data n bytes
no terminator
3) error block
block id 1 byte 375
4) end block
block id 1 byte 374
5) time block (follows name block wxcept on links)
block id 1 byte 373
julian day last access (opened) since 1/1/68 2 bytes
julian day created 2 bytes
time created left byte = hour, right byte = min created 2 bytes
no terminator
6) link data block (follows name block on link)
block id 1 byte 372
alternate dir name(if any) followed by null variable bytes
link alias name(if any) followed by null variable bytes
Hope this helps
Jack Moskowitz <jackm at ardc>
AMCCOM
Dover, New Jersey 07801
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