5 Jun
2008
5 Jun
'08
6:15 a.m.
TM4's were on the SDS9300, six of them, as I recall they were 10 track but
something also says 9 track, after all it was 35 years ago !..
There were also TM4's fitted to an ICL (I think a 1901) machine up in London
but I only visited for service once (dirty contacts on the tape arm
switches).
There were also TM2 drives on a LEO3 #26 at Charles House in London
maintained by ICL for running gas bills. I gather quite a number of the Leo
machines used TM drives.
Mike
----- Original Message -----
From: "Roger Holmes" <roger.holmes at microspot.co.uk>
To: <cctalk at classiccmp.org>
Sent: Thursday, June 05, 2008 9:50 AM
Subject: Re: [personal] UK Computer Museum on TV
From:
"Mike Hatch" <mike at brickfieldspark.org>
Have past experience with Elliott 803b, Digital
PDP7 & 11/20, Scientific
Data Systems SDS9300, ASR/KSR 33 & 35, Ampex TM4 tape drives.
May I ask what machine the Ampex TM4 tape drives were connected to? I
have them on my ICT 1301s, and I have a slightly different deck marked
TM4 Leo but if you know of any other machines which used them it would be
interesting. Do you know if they were always ten track read/write heads
or were they different configurations? I guess the formats were different
across different machines, it seems unlikely anyone else would have
chosen to use 4 data bits and 6 CRC bits, and certainly not in multiples
of 12 digits with the digits from each half of the word interspersed
ending at a word of hex FFFFFFFFFFFF.
Roger