YMF721 datasheet(34/41 Pages) LSI

34 / 41 page

YMF721

July 10, 1997

- 34 -

3. System Realtime Message

3-1. System Reset

<FFH>

Notes of all channels are damped.

Controllers of all channels become default value.

3-2. System Exclusive Message

3-2-1. GM System Level 1 ON

3-2-2. XG System ON

n : Device No. Don’t care.

When this message is received, Notes of all channels are damped.

All setting value become default without MIDI Master Tuning.

3-2-3. MIDI Master Volume

When this message is received, all volumes are set.

Data range of ss and tt is 0 to 127 (00H to 7FH). However, the value of tt is only valid, and ss is

ignored.

00H : Minimum volume, 7FH : Maximum volume

3-2-4. MIDI Master Tuning

n : Device No. Don’t care.

When this message is received, pitch of all channel are changed at the same time.

Data range of xm and xl is 0 to 127 (00H to 7FH). However, 8 bits value (0 to 255), that is composed

of m and l, is valid range.

128 (ml=80H) : Center,

±1 : up/down by 1¢

This parameter is ignored at drum kit (channel 10 and bank 127).

And, this parameter is not reset by System Reset, GM System Level 1 ON and XG System ON.

3-2-5. Power Down Command

3-2-6. Internal Micro-Processor Reset Command

YMF721 Datasheet(PDF) 34 Page - LSI Computer Systems