XSG Register Map

Bank 1 - Sound unit 1 (channels A, B and C)

Reg.	Name	B7	B6	B5	B4	B3	B2	B1	B0
R00	Channel A frequency	LSB
R01						MSB
R02	Channel B frequency	LSB
R03						MSB
R04	Channel C frequency	LSB
R05						MSB
R06	Noise generator 1 frequency				noise frequency
R07	Sound unit 1 mixer settings	1	0	Noise			Tone
				C	B	A	C	B	A
R08	Channel A level				M	L3	L2	L1	L0
R09	Channel B level				M	L3	L2	L1	L0
R0A	Channel C level				M	L3	L2	L1	L0
R0B	Envelope generator 1 frequency	LSB
R0C		MSB
R0D	Envelope generator 1 shape					CTN	ATT	ALT	HLD

Bank 2 - Sound unit 2 (channels D, E and F)

Reg.	Name	B7	B6	B5	B4	B3	B2	B1	B0
R10	Channel D frequency	LSB
R11						MSB
R12	Channel E frequency	LSB
R13						MSB
R14	Channel F frequency	LSB
R15						MSB
R16	Noise generator 2 frequency				noise frequency
R17	Sound unit 2 mixer settings	1	0	Noise			Tone
				F	E	D	F	E	D
R18	Channel D level				M	L3	L2	L1	L0
R19	Channel E level				M	L3	L2	L1	L0
R1A	Channel F level				M	L3	L2	L1	L0
R1B	Envelope generator 2 frequency	LSB
R1C		MSB
R1D	Envelope generator 2 shape					CTN	ATT	ALT	HLD

Bank 3 - Control set

Reg.	Name	B7	B6	B5	B4	B3	B2	B1	B0
R24	Timer A Data	MSB
R25								LSB
R26	Timer B Data	Data
R27	Timer Control			RESET		ENABLE		LOAD
				B	A	B	A	B	A
RF0	Channel A waveform select		waveform select
RF1	Channel B waveform select		waveform select
RF2	Channel C waveform select		waveform select
RF3	Channel D waveform select		waveform select
RF4	Channel E waveform select		waveform select
RF5	Channel F waveform select		waveform select
RF6	Internal waveform select		waveform select
RF7	Internal waveform offset				waveform offset
RF8	Waveform data	waveform data
RF9	Reserved
RFA	Stereo mixer			Right			Left
				C	B	A	C	B	A
RFB				Right			Left
				F	E	D	F	E	D
RFC	Operation mode					LA	MA	MR	WO
RFD	Status							Flag B	Flag A
RFE	Test	device id