The documentation for the MSX-AUDIO BIOS upgrade for Philips Music Module on MSXpro has been updated. Changes in the new document are:

  • Added the missing connection for the EPROM's A13 pin
  • The /CS signals for the EPROM and SRAM were swapped

The MSX-AUDIO BIOS that has been released is a generic BIOS that can be used in any Y8950 based device that uses the default MSX ports (c0h/c1h and c2h/c3h). Basically this BIOS is the original ASCII BIOS, splitted from the rest of the ROM (music editor, demos, etc), without the switch check and with a little initialization bugfix.

Relevant link: MSXpro