On 05/01/2021 11:13, Richard Kettlewell wrote:
> Ahem A Rivet's Shot  writes:
>> Richard Kettlewell  wrote:
>>> gareth evans  writes:
>>>> I am particularly interested in the Binary Blob
>>>> provided for Raspberry Pi computers, with a view to
>>>> getting detailed knowledge of the video processors
>>>> employed therein.
>>>
>>> Why would you do that instead of reading a reference manual for the
>>> target architecture?
>>
>>  The documentation for the GPU on the RPi has not been published,
>> he seeks to reverse engineer it from the binary code that implements a
>> published API on it.
>
> I was under the impression it was a VideoCore IV, which appears to be
> sufficiently documented for GNU toolchain port.
>
> https://docs.broadcom.com/doc/12358545
> https://github.com/itszor/vc4-toolchain
>

The first of those does not produce anything.

Does the second describe the GPU in some detail and describe
the instruction set such that I might produce my own binary blob
to do something completely different?

Also, AIUI, a different GPU has been incorporated into the
64-bit RPis.

Anyway, thanks for your input.

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