VT8231 datasheet(61/132 Pages) ETC

61 / 132 page

VT8231

Preliminary Revision 0.8 October 29, 1999

-55-

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Command Summary – Sound Processor

#Type

Command

10 Play

8 bits directly

14 Play

8 bits via DMA

91 Play

High-speed 8 bits via DMA

16 Play

2-bit compressed via DMA

17 Play

2-bit compressed via DMA with reference

74 Play

4-bit compressed via DMA

75 Play

4-bit compressed via DMA with reference

76 Play

2.6-bit compressed via DMA

77 Play

2.6-bit compressed via DMA with reference

20 Record Direct

24 Record Via DMA

99 Record High-speed 8 bits via DMA

D1 Speaker Turn on speaker connection

D3 Speaker Turn off speaker connection

D8 Speaker Get speaker setting

40 Misc

Set sample rate

48 Misc

Set block length

80 Misc

Set silence block

D0 Misc

Stop DMA

D4 Misc

Continue DMA

E1 Misc

Get version

30 MIDI

Direct MIDI input

31 MIDI

MIDI input via interrupt

32 MIDI

Direct MIDI input with time stamp

33 MIDI

MIDI input via interrupt with time stamp

34 MIDI

Direct MIDI UART mode

35 MIDI

MIDI UART mode via interrupt

36 MIDI

Direct MIDI UART mode with time stamp

37 MIDI

MIDI UART mode via interrupt with time stamp

38 MIDI

Send MIDI code

Game Port Registers

These registers are fixed at the standard game port address of

201h.

I/O Port 201h – Game Port Status ................................... RO

Joystick B Button 2 Status

Joystick B Button 1 Status

Joystick A Button 2 Status

Joystick A Button 1 Status

Joystick B One-Shot Status for Y-Potentiometer

Joystick B One-Shot Status for X-Potentiometer

Joystick A One-Shot Status for Y-Potentiometer

Joystick A One-Shot Status for X-Potentiometer

I/O Port 201h – Start One-Shot....................................... WO

7-0

(Value Written is Ignored)

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