27 Jan
2002
27 Jan
'02
10:26 a.m.
William Donzelli wrote:
I don't think cheap was the problem, overkill was. That was a complex
drive for fast control. Also too was the fact this was big $$$
equipment so they had no reason make really simple but rather built
to last. There really is not that much on the IBM-1130 on the web.
That is too bad as for its time it was a very nice machine. A read
somewhere too the IBM-1130 was also microcoded too.
A quick search on the web. Wow more than when I checked a year ago.
http://people.mn.mediaone.net/bigoak/fs/ibm1130.htm A working IBM-1130.
http://www.shubs.net/1130/ basic info
http://ed-thelen.org/comp-hist/vs-ibm-1130.html more history.
All I have from that IBM stuff is the book
'Programing the IBM 1130'
by J.K. Hughes. What I do remember is that the logic sure used a lot
of one-shots and delay lines.
That is probably just the stuff in the drive itself. The real brain, the
2841, was (yes, probably sadly "was") a complicated microcoded box that
latched onto a channel, controlled a number of drives and drums, and
could run diagnostics offline.
Apparently 1130 systems could use 2311s with a control unit located as a
feature of the 1131. Must have been a big feature...or maybe IBM
cheapened the control unit with said one-shots, delay lines, and other
kludges, in order to cram it into the processor. William Donzelli
aw288(a)osfn.org
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html