Hi Richard, Did you check the turboR ST and/or GT service manual? The YM2413 is on the schematics, WE is tied low there too.
www.msxhans.msx2.com, hardware section, Panasonic turboR Hans ----- Original Message ----- From: "Richard Atkinson" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, January 13, 2002 05:35 Subject: Re: MSX-MUSIC schematics > On Sun, 13 Jan 2002, Richard Atkinson wrote: > > > Does anyone have a schematic of an MSX-MUSIC chip, either the original > > FM-PAC or one of the others? I am building a board to connect an FM-PAC to > > a Sega Master System expansion port for the FM sounds in many Master > > System games, and I need to know what is done with the WE# line on the > > YM2413. > > I seem to be answering my own question, for the Zemina MSX-MUSIC. However, > the results I have got lead me to believe this cartridge is not much use > for my project, as it cannot read from the YM2413. This also makes it > useless for my planned test register investigation. I would be still be > interested in hearing about other MSX-MUSICs, including the implementation > inside MSX2+ machines and the Panasonic FM-PAC. > > > MSX MSX-MUSIC I/O locations (FOR ZEMINA MSX-MUSIC) > > > > 7C addr write > > 7D data write > > > > A7 A6 A5 A4 A3 A2 A1 A0 > > 0 1 1 1 1 1 0 -- A0 -> YM2413 A0 > > YM2413 WE# tied low. Cartridge may only write > to the chip > > address decode 7C - 7D > > > > > > Richard > > > > -- > > For info, see http://www.stack.nl/~wynke/MSX/listinfo.html > > -- > > This email was forwarded via the University of Cambridge alumni email system > > Visit http://cantab.net/ to update your forwarding details > > > > > -- > For info, see http://www.stack.nl/~wynke/MSX/listinfo.html > -- For info, see http://www.stack.nl/~wynke/MSX/listinfo.html
