Also: https://twitter.com/id_aa_carmack/status/1340794861050605568 https://twitter.com/id_aa_carmack/status/1340794861050605568 > AFAIK, nobody ever ported Do

Also: https://twitter.com/id_aa_carmack/status/1340794861050605568 https://twitter.com/id_aa_carmack/status/1340794861050605568 > AFAIK, nobody ever ported Doom to run on a Cray 1. The scalar CPU should be fast enough (in 1976!) to draw 320x200, but memory would be an issue because it wasn't byte addressable -- you could only load and store aligned 64 bit values, and a max of 1M elements would be a pinch. > You could burn instructions to shift and mask on the low order address bits, but a faster path would be to interleave 8 independent textures at different bit positions in the words, and have specialized texture mapping routines with a constant shift and mask. I don't recall ever considering that arrangement, but there may have been relevant consumer systems where doing it for 2 or 4 bit textures packed in bytes would have been helpful. > Figuring out how to best exploit chained vector instructions for texture mapping on the Cray would be phase two.