APU Registers

Audio Processing Unit I/O ports. More...

Macros
#define	REG_APUIO0   (*(vu8*)0x2140)
	APU I/O port 0 (R/W).
#define	REG_APUIO1   (*(vu8*)0x2141)
	APU I/O port 1 (R/W).
#define	REG_APUIO2   (*(vu8*)0x2142)
	APU I/O port 2 (R/W).
#define	REG_APUIO3   (*(vu8*)0x2143)
	APU I/O port 3 (R/W).

Detailed Description

Audio Processing Unit I/O ports.

These four ports are used for communication between the main CPU and the SPC700 audio processor. Both CPUs can read and write to their respective sides - writes go to output latches visible to the other processor.

Macro Definition Documentation

REG_APUIO0

#define REG_APUIO0   (*(vu8*)0x2140)

APU I/O port 0 (R/W).

REG_APUIO1

#define REG_APUIO1   (*(vu8*)0x2141)

APU I/O port 1 (R/W).

REG_APUIO2

#define REG_APUIO2   (*(vu8*)0x2142)

APU I/O port 2 (R/W).

REG_APUIO3

#define REG_APUIO3   (*(vu8*)0x2143)

APU I/O port 3 (R/W).