11 Mar
2005
11 Mar
'05
9:18 p.m.
Anyone know the format of ".tap" files found on
www.bitsavers.org/bits/... ?
I'm assuming these files somehow encode block lengths
and file marks. I'll try to noodle it out, but would
appreciate any tips as well.
Best,
John Sambrook
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11 Mar
11 Mar
11:31 p.m.
At 6:18 PM -0800 3/11/05, John Sambrook wrote:
Anyone know the format of ".tap" files found
on
www.bitsavers.org/bits/... ?
I'm assuming these files somehow encode block lengths
and file marks. I'll try to noodle it out, but would
appreciate any tips as well.
If they're .TAP files, they're most likely in the SIMH tape format.
Zane
--
--
| Zane H. Healy | UNIX Systems Administrator |
| healyzh at aracnet.com (primary) | OpenVMS Enthusiast |
| | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| PDP-10 Emulation and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |
11:48 p.m.
Zane H. Healy wrote:
At 6:18 PM -0800 3/11/05, John Sambrook wrote:
Thank you, Zane. That appears to be the format. They look
like just plain SIMH format.
Best,
John Sambrook
Anyone know the format of ".tap" files
found on
www.bitsavers.org/bits/... ?
I'm assuming these files somehow encode block lengths
and file marks. I'll try to noodle it out, but would
appreciate any tips as well.
If they're .TAP files, they're most likely in the SIMH tape format.
Zane 
12 Mar
12 Mar
2:56 a.m.
New subject: Format of '.tap' files on bitsavers ...
John Sambrook wrote:
Anyone know the format of ".tap" files found
on
www.bitsavers.org/bits/... ?
It's John Wilson's tape image file format.
A data record consists of a four byte record length, the data,
then another copy of the record length. The record length is stored
in little-endian byte order.
A tape mark is fourbytes of zeros.
There are no extra padding bytes to force any alignment.
Bob Subnik's SIMH tape image file format is similar except that it
uses 16-bit alignment. SIMH comes with utilities to convert the
formats.
There are also some simple tape image utilities at:
http://www.brouhaha.com/~eric/software/tapeutils/
Eric
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3 comments
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participants (4)
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eric＠brouhaha.com -
healyzh＠aracnet.com -
john.sambrook＠common-sense.com -
john_sambrook＠yahoo.com