GT-40 etc.

[Guy Sotomayor Jr]

> On Jan 21, 2018, at 11:47 AM, Al Kossow via cctalk <cctalk at 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
>> 
>