On Tue, Feb 11, 2020 at 9:44 AM Al Kossow via cctalk <cctalk@classiccmp.org> wrote:
> > > On 2/11/20 8:28 AM, Rick Bensene via cctalk wrote: > > It has a label on it that says "BR 2412". > > Bunker-Ramo, originally Nuclear Data NDP-812 > 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.) > > Hang in there, man. > > Seconded. - Josh
