Yamaha OPL3-SA3 specifications YMF715E, DSP Command, CMD Support Function, May

YMF715E

9-1-2-1. DSP Command

Listed below are the supported commands of DSP defined Sound Blaster Pro compatibility.

CMD Support Function

10h	o	8bit direct mode digitized sound I/O output
14h	o	8bit single-cycle DMA mode digitized sound output
16h	*1	8bit to 2bit ADPCM single-cycle DMA mode digitized sound output
17h	*1	8bit to 2bit ADPCM single-cycle DMA mode digitized sound output with ref. byte
1Ch	o	8bit auto-init DMA mode digitized sound output
1Fh	*1	8bit to 2bit ADPCM auto-init DMA mode digitized sound output with ref. byte
20h	*1	8bit direct mode single byte digitized sound input
24h	*1	8bit single-cycle DMA mode digitized sound input
2Ch	*1	8bit auto-init DMA mode digitized sound input
30h	o	Polling mode MIDI input
31h	o	Interrupt mode MIDI input
34h	o	UART polling mode MIDI I/O
35h	o	UART interrupt mode MIDI I/O
36h	o(*2)	UART polling mode MIDI I/O with time stamping
37h	o(*2)	UART interrupt mode MIDI I/O with time stamping
38h	o	MIDI output
40h	o	Set digitized sound transfer Time Constant
48h	o	Set DSP block transfer size
74h	o	8bit to 4bit ADPCM single-cycle DMA mode digitized sound output
75h	o	8bit to 4bit ADPCM single-cycle DMA mode digitized sound output with ref. byte
76h	*1	8bit to 3bit ADPCM single-cycle DAM mode digitized sound output
77h	*1	8bit to 3bit ADPCM single-cycle DMA mode digitized sound output with ref. byte
7Dh	o	8bit to 4bit ADPCM auto-init DMA mode digitized sound output with ref. byte
7Fh	*1	8bit to 3bit ADPCM auto-init DMA mode digitized sound output with ref. byte
80h	o	Pause DAC for a duration
90h	o	8bit high-speed auto-init DMA mode digitized sound output
91h	o	8bit high-speed single-cycle DMA mode digitized sound output
98h	*1	8bit high-speed auto-init DMA mode digitized sound input
99h	*1	8bit high-speed single-cycle DMA mode digitized sound input
A0h	*1	Set input mode to mono
A8h	*1	Set input mode to stereo
D0h	o	Pause 8bit DMA mode digitized sound I/O
D1h	*1	Turn on speaker
D3h	*1	Turn off speaker
D4h	o	Continue 8bit DMA mode digitized sound I/O
D8h	*1	Get speaker status
DAh	o	Exit 8bit auto-init DMA mode digitized sound I/O
E1h	o	Get DSP version number

Note :

*1) These commands are performed in state-machine, but they are not effective.

*2) MIDI data can not be received.

Additional undocumented commands are included.

May 21, 1997

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