Nope, they're numbered 2479 9595, but ISTR some irregularities among BBM part numbers, especially when it came to LSI and memory chips.
They do have GND and Vcc on pins 9 and 10 respectively though, as Brent suggests; maybe my memory from 30 years ago isn't so bad after all (no idea what I had for breakfast though). I did misremember the no. of chips though: 9 x 16, so presumably with parity. m On Sat, Jan 21, 2023 at 5:10 PM Bill Degnan via cctalk < cctalk@classiccmp.org> wrote: > What is the Burroughs part number / printed on the chip? The 1449 1112 RAM > chips are Burroughs' part number for the intel 2102 RAM > Bill > > On Sat, Jan 21, 2023, 3:51 PM Brent Hilpert via cctalk < > cctalk@classiccmp.org> wrote: > > > On 2023-Jan-21, at 11:25 AM, Mike Stein via cctalk wrote: > > > > > Finally, some Burroughs memory boards containing what I think are > 2102s, > > > but I'd have to investigate. > > > > Soldered or socketed? > > > > I'm on the lookout for 16 (or more to have some spares) 2102s to populate > > an EconoRAM S100 memory board to go in an Altair. Proviso being they have > > to be 'fast enough' (<=450nS, not sure whether 650 would be OK or not). > > > > ... > > > Speaking of gold-plated chips, I'm finally scrapping the last remnants > > of a > > > Redactron mag card word processor; the main board has some house > numbered > > > white ceramic chips with the usual gold pins and lids (24, 40, 16 > pins). > > > > (Could probably figure out many of them with some rev-eng'ing to get > their > > pinout.) > > > > >
