3 ms·
The custom CPU for Cinematronics (Vectorbeam) games used three of these (from https://archive.org/details/ArcadeGameManualRipoff https://archive.org/details/Arc
by sehugg 10y ago
The custom CPU for Cinematronics (Vectorbeam) games used three of these (from https://archive.org/details/ArcadeGameManualRipoff https://archive.org/details/ArcadeGameManualRipoff)
The ALU is implemented using three 24LS181
(N6M6L6) function generators, three 74LS85
(N9,M9,L9) 4 bit magnitude comparators, and
a 74S182 (L4) look ahead carry generator.
- kens 10y agoIt amazes me that making a 12 bit processor out of TTL was still a reasonable thing to do in the late 1970s.