Noticed a co processor

General information to do with the PlayStation 1 Hardware. Including modchips, pinouts, rare or obscure development equipment, etc.
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Tylerpsx
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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

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

Does any other game also uses this techinque?

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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.

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