YMF721 - LSI Computer Systems

YMF721 FM + Wavetable Synthesizer LSI

ISA bus interface : 19 pins Pin name ADB7-0 A2-0 /MPUCS /OPLCS /IOW /IOR RST AIRQ ABDIR ARDY MIDI interface : 2 pins Pin name RXD FSP pins 1 1 I/O I I Type TTL TTL Size Function MIDI serial data input Selection of MIDI serial/parallel transmission (“H” : Parallel, “L” : Serial) pins 8 3 1 1 1 1 1 1 1 1 I/O I/O I I I I I I O O OD Type TTL TTL TTL TTL TTL TTL .

Features

• The Wavetable synthesizer of this LSI is able to generate up to 24 types of sounds simultaneously.
• Has an interface that makes this LSI compatible with MPU-401 UART mode.
• Has an OPL3 (FM synthesizer) for AdLib/Sound Blaster applications.
• Has a 1 Mbyte built-in Wavetable sample ROM.
• Complies with GM system Level 1. (Thus, it is compatible with DOS applications that support MPU-401.)
• MIDI signal can be transmitted either through serial input or parallel input.
• FM synthesizer and Wavetable synthesizer of this LSI can generate their sound at the same time.
• FM synthesizer is registe.