Re: Looking for YMF262

From: Mike Naberezny (
Date: 1999-06-29 01:27:04

On Mon, 28 Jun 1999, Nicolas Welte wrote:

> Hi!
> I read about the plans to upgrade the Sound Expander to use OPL2 or OPL3
> chips. The chip source would be old Soundblaster cards or compatibles.
> Why not make an interface to allow the Soundblaster card being plugged
> into the C64 expansion port? I don't think that much would be needed:
> Maybe a MHz clock source, some logic glue to convert some bus
> signals and of course the OPL2/3 address had to be mapped somewhat to
> make the SB Sound Expander compatible. As a bonus some future
> applications could even make use of the ADC and DAC on the SB card. 

This may certainly be a possibility.  I once wired up an old PC internal
modem to my C64's expansion port.  All I did was provide the necessary
voltages and a little "glue" map the onboard UART into the $DE00 space.
Probably the biggest problem with interfacing to a Sound Blaster card
would be writing the software.

 - Mike Naberezny (

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