14 Oct
2010
14 Oct
'10
8:22 a.m.
On 14 Oct 2010 at 7:34, James A. Markevitch wrote:
The x,y,z values apparently represent a record number
(128-byte
records). x is an ASCII digit (30 - 39 hex) y is an ASCII digit (30 -
39 hex) z has the range 40 - 5F hex (at sign through underscore)
I owned a Techtran dual-casette data drive around that time that was
a type of replacement for a paper tape unit. ISTR that it could
transfer at the truly stunning speed of 2400 bps.
It could do record search, skipping, copying, etc. all under software
control (special "escape" codes). Sadly I no longer have the
documentation for it.
Maybe Al has some information on these old units.
--Chuck