29 May
2009
29 May
'09
3:10 p.m.
I'm calling the D825 as being earlier as it was a
vacuum-tube box,
while the B5500 was solid-state. ?In any case, the design was
probably much earlier than the B5500.
Maybe - hard to say, being a government-to-civilian
(apples-to-oranges) comparison.
That could imply that although SAGE used them as
backup, ?they
weren't necessarily limited in that way.
I think that actual usage would count in my argument. Otherwise, you
could start including lots of machines earlier to either of the two
Burroughs boxes we are talking about - SMP 709s?
Anyone know for certain? ?Could both CPUs be running
at once?
I would actually like to see some more detailed docs on BUIC - there
seems to be very little available. Hell, I do not even know what BUIC
modules and equipment looks like, and have probably passed some of it
up, or worse, scrapped it.
--
Will
29 May
29 May
3:43 p.m.
On Fri, 29 May 2009, William Donzelli wrote:
> I'm calling the D825 as being earlier as it
was a vacuum-tube box,
> while the B5500 was solid-state. ?In any case, the design was
> probably much earlier than the B5500.
The D825 was definitely not tubes (I trained on one at Keesler AFB in
1982. Burroughs called it HTDL (Hybrid Transistor Diode Logic).
http://bitsavers.vt100.net/pdf/burroughs/D8xx/TR61-58B_D_825_Modular_Proc_S…
http://ed-thelen.org/comp-hist/BRL64-b.html#BURROUGHS-D825
I would actually like to see some more detailed docs
on BUIC - there
seems to be very little available. Hell, I do not even know what BUIC
modules and equipment looks like, and have probably passed some of it
up, or worse, scrapped it.
Here are some pictures from UMN:
http://snuffy.lib.umn.edu/image/srch/bin/Dispatcher?mode=600&id=cb000080
http://snuffy.lib.umn.edu/image/srch/bin/Dispatcher?mode=600&id=cb000078
http://snuffy.lib.umn.edu/image/srch/bin/Dispatcher?mode=600&id=cb000079
http://snuffy.lib.umn.edu/image/srch/bin/Dispatcher?mode=600&id=cb000076
Mike Loewen mloewen at cpumagic.scol.pa.us
Old Technology http://sturgeon.css.psu.edu/~mloewen/Oldtech/
4:38 p.m.
Looks like the D825 in 1963 was the first pratical MP system.
A nice summery can be found at:
http://tinyurl.com/l92hnc
aka
http://wiki.cc.gatech.edu/folklore/index.php?
title=Some_Burroughs_Transistor_Computers&printable=yes#The_D825
About 10 years later IBM shipped a bunch of 370/158 and 168s as MPs and APs
The MPs were 2 standalone CPUs frames bound at the Hip, with an MP frame,
while the APs were a second ALU frame that attached as an extension to a single CPU
frame.
In the case of the IBM MPs there was not only 2 processors but there was two I/O busses
for that matter two complete systems.
These were very popular with Banking and large billing applications.
The other Bob
The other Bob
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caveguy＠sbcglobal.net -
mloewen＠cpumagic.scol.pa.us -
wdonzelli＠gmail.com