29 May
2009
29 May
'09
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/