Possible to use SN74689 emulation in BlueMSX?

By Huey

Prophet (2675)

Huey's picture

08-10-2011, 15:12

BlueMSX emulates the Colecovision (which uses the SN74689).
Is is possible to add the SN74689 to a normal MSX setup in BlueMSX?

I really would like to do some experiments with it.

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By Manuel

Ascended (18088)

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08-10-2011, 17:54

I think you would need to do some coding to get that done. You'll have to specify how this device connects to the MSX, for instance.

By Huey

Prophet (2675)

Huey's picture

09-10-2011, 10:42

So it's not possible to mix the Colecovision and e.g. MSX turbo-r with each other. CryingCryingCryingCryingCryingCryingCryingCryingCryingCrying

By Manuel

Ascended (18088)

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09-10-2011, 11:32

That's what I would expect, but I'm far from a blueMSX expert. Maybe hap knows?

By hap

Paragon (2037)

hap's picture

09-10-2011, 12:06

romMapperJoyrexPsg.c mayhaps?

By Huey

Prophet (2675)

Huey's picture

09-10-2011, 13:08

The Joyrex PSG cartridge is a cartridge created by Vincent van Dam with a ColecoVision PSG on it. You can therefore use MSX trackers to compose music for ColecoVision.

Excellent! Thanks!

port 0xff??

By Sander

Founder (1865)

Sander's picture

10-10-2011, 09:38

Franky and PlaySoniq also contain a compatible SN74689 psg (as part of the Sega VDP).

By Vincent van Dam

Hero (513)

Vincent van Dam's picture

10-10-2011, 11:48

Interesting requirement ;-)
The port is mapped to $f0 on blueMSX ($f0 = blueMSX stub, $ff = ColecoVision).

By Huey

Prophet (2675)

Huey's picture

10-10-2011, 11:54

@Vincent: Thanks! I figured you used it for the Colecovision conversion(s). Hence the 0xff assumption.

By Huey

Prophet (2675)

Huey's picture

18-10-2011, 15:54

Franky and PlaySoniq also contain a compatible SN74689 psg (as part of the Sega VDP).

On Fanky and PlaySonig it is both 0x48?

And SN74689 is hearable through normal MSX output or only through Franky/PlaySoniq?