Re: About the C364...

From: Nicolas Welte (
Date: 2000-10-26 17:51:41

Richard Atkinson wrote:
> > 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.

The TPI also controls the pass-through cartridge port and the memory
mode of the C64, so not much of it is really needed for the 6721, just a
4bit register and some handshake lines, plus NMI generation. But the 264
series doesn't have an NMI. 

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