> On Jan 21, 2018, at 11:47 AM, Al Kossow via cctalk <cctalk@classiccmp.org> > wrote: > > HP1311A is what was used in Galaxy Game > https://www.hpmuseum.net/display_item.php?hw=732 > > The actual GG controller is a microcoded 2903 bitslice that sits on the Unibus > Supposed to be similar to the VT-48 > > Didn't James build something (FPGA based?) to play the game?
James may have done something on this. I’m not sure. I do know that the CMU GDP did not have any VLSI (or LSI) in it. It was pretty straight SSI and MSI TTL from what I can recall with a bunch of custom built DACs. The GDP was connected to the UNIBUS but it was a separate box (1U/2U) from the 11/20. TTFN - Guy > > > On 1/21/18 10:48 AM, Guy Sotomayor Jr wrote: > >> HP made some wonderful 17” and 19” electrostatic deflection vector displays. >> We had a pile of them at >> CMU driven by a custom GDP (some had 10-bit DACs, some had 12-bit DACs) that >> was front-ended by >> a PDP-11 (usually an 11/20). It was a *wonderful* combination! >> >> TTFN - Guy >> >
