11 Feb
2020
11 Feb
'20
4:14 p.m.
On Tue, Feb 11, 2020 at 9:44 AM Al Kossow via cctalk <cctalk at classiccmp.org>
wrote:
On 2/11/20 8:28 AM, Rick Bensene via cctalk wrote:
Yep. 12-bit machine, four accumulators, multiply/divide logic standard.
All built on a single large, wire-wrapped board stuffed with 9000-series
logic, using extremely poor quality wire-wrapped sockets. The one in that
picture almost works properly after a week or three of cleaning and
debugging (the mul/div hardware screws up somewhere and I never tracked it
down). Bigger issue is that my unit doesn't have any I/O devices at all,
so I'll have to build one.
The BR 2412 is basically identical to the ND-812, except the latter used
core memory and the former uses battery-backed SRAM. (Big lead-acid
battery in there.)
It has a label on it that says "BR
2412".
Bunker-Ramo, originally Nuclear Data NDP-812
Hang in there, man.
Seconded.
- Josh