Noticed a co processor

Post by **Tylerpsx** » November 18th, 2022, 1:37 am

Hi I was watching a documentary on crash bandicoot and the lead programer was talking about using a co processor for increased gpu output for the PlayStation is there any documents on doing that floating around here or on the internet that I can’t seem to find a little help finding the right direction would be nice

Post by **Administrator** » November 18th, 2022, 1:17 pm

Andy Gavin was talking about the GTE on the R3000A which was fast at doing vector based calculations. In the early SDK from Sony/SN Systems when Crash 1 was being developed, there was no strong documentation surrounding it so one of the guys at Sony shared how it worked on a little scrap of paper. There was also the MDEC decoder, but I don't believe they used that since it's solely used for decoding MDEC frames.

Post by **locarno** » March 15th, 2023, 12:30 am

Does any other game also uses this techinque?

Post by **Xavi92** » March 15th, 2023, 7:16 am

locarno wrote: ↑March 15th, 2023, 12:30 am Does any other game also uses this techinque?

I am quite sure most (if not all) PS1 3D video games used the GTE for vector-based calculations, as it was explicitly designed for such purpose.