Re: About the C364...

From: Richard Atkinson (
Date: 2000-10-26 15:37:35

On Thu, 26 Oct 2000, Grosz, Attila wrote:

> I was peeking into the disassembly list of the C364 speech ROM and i found
> references to the $FD20-21-22-23 addresses which are to my best knowledge,
> were not mapped on other C264 family 8 bit micros.

The 264 series PLA has an $fd2x address decode.

> I wonder what this might be? An I/O port? And what protocol does it use?
> Does the digitised speech have the same format as the plus/4 digi at 7. bit
> of $FF11?
> How was it done? As it is not using any TED registers AFAIK...

Same chip as the C64 Magic Voice, the Toshiba T6721A. The 4 addresses may
be used in a similar way to the registers of the 6525 TPI in the MV.


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