YM2149 Register map¶

Created with Corsair v1.0.4.

Conventions¶

Access mode	Description
rw	Read and Write
rw1c	Read and Write 1 to Clear
rw1s	Read and Write 1 to Set
ro	Read Only
roc	Read Only to Clear
roll	Read Only / Latch Low
rolh	Read Only / Latch High
wo	Write only
wosc	Write Only / Self Clear

Register map summary¶

Base address: 0x10001000

Name	Address	Description
PSG0_CHA_TONE_PERIOD_FINE	0x00000000	Channel A fine tone period adjustment.
PSG0_CHA_TONE_PERIOD_COARSE	0x00000004	Channel A coarse tone period adjustment.
PSG0_CHB_TONE_PERIOD_FINE	0x00000008	Channel B fine tone period adjustment.
PSG0_CHB_TONE_PERIOD_COARSE	0x0000000c	Channel B coarse tone period adjustment.
PSG0_CHC_TONE_PERIOD_FINE	0x00000010	Channel C fine tone period adjustment.
PSG0_CHC_TONE_PERIOD_COARSE	0x00000014	Channel C coarse tone period adjustment.
PSG0_NOISE_PERIOD	0x00000018	Noise period.
PSG0_DISABLE	0x0000001c	Mixer settings.
PSG0_CHA_LVL	0x00000020	Channel A level control.
PSG0_CHB_LVL	0x00000024	Channel B level control.
PSG0_CHC_LVL	0x00000028	Channel C level control.
PSG0_ENV_PERIOD_FINE	0x0000002c	Envelope frequency fine adjustment.
PSG0_ENV_PERIOD_COARSE	0x00000030	Envelope frequeny coarse adjustment.
PSG0_ENV_SHAPE	0x00000034	Envelope shape.
PSG1_CHA_TONE_PERIOD_FINE	0x00000040	Channel A fine tone period adjustment.
PSG1_CHA_TONE_PERIOD_COARSE	0x00000044	Channel A coarse tone period adjustment.
PSG1_CHB_TONE_PERIOD_FINE	0x00000048	Channel B fine tone period adjustment.
PSG1_CHB_TONE_PERIOD_COARSE	0x0000004c	Channel B coarse tone period adjustment.
PSG1_CHC_TONE_PERIOD_FINE	0x00000050	Channel C fine tone period adjustment.
PSG1_CHC_TONE_PERIOD_COARSE	0x00000054	Channel C coarse tone period adjustment.
PSG1_NOISE_PERIOD	0x00000058	Noise period.
PSG1_DISABLE	0x0000005c	Mixer settings.
PSG1_CHA_LVL	0x00000060	Channel A level control.
PSG1_CHB_LVL	0x00000064	Channel B level control.
PSG1_CHC_LVL	0x00000068	Channel C level control.
PSG1_ENV_PERIOD_FINE	0x0000006c	Envelope frequency fine adjustment.
PSG1_ENV_PERIOD_COARSE	0x00000070	Envelope frequeny coarse adjustment.
PSG1_ENV_SHAPE	0x00000074	Envelope shape.
FILTER_MIXER_VOLA	0x00000200	Filter mixer PSG0 channel A volume.
FILTER_MIXER_VOLB	0x00000204	Filter mixer PSG0 channel B volume.
FILTER_MIXER_VOLC	0x00000208	Filter mixer PSG0 channel C volume.
FILTER_MIXER_VOLD	0x0000020c	Filter mixer PSG1 channel A volume.
FILTER_MIXER_VOLE	0x00000210	Filter mixer PSG1 channel B volume.
FILTER_MIXER_VOLF	0x00000214	Filter mixer PSG1 channel C volume.
FILTER_MIXER_MVOL	0x00000218	Filter mixer master volume.
FILTER_MIXER_INV	0x0000021c	Filter mixer channel inverter
FILTER_MIXER_BASS	0x00000220	Filter mixer bass level.
FILTER_MIXER_TREBLE	0x00000224	Filter mixer treble level.

PSG0_CHA_TONE_PERIOD_FINE¶

Channel A fine tone period adjustment.

Address offset: 0x00000000

Reset value: 0x00000000

psg0_cha_tone_period_fine

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Channel A fine tone period adjustment.

Back to Register map.

PSG0_CHA_TONE_PERIOD_COARSE¶

Channel A coarse tone period adjustment.

Address offset: 0x00000004

Reset value: 0x00000000

psg0_cha_tone_period_coarse

Name	Bits	Mode	Reset	Description
-	31:4	-	0x0000000	Reserved
VALUE	3:0	rw	0x0	Channel A coarse tone period adjustment.

Back to Register map.

PSG0_CHB_TONE_PERIOD_FINE¶

Channel B fine tone period adjustment.

Address offset: 0x00000008

Reset value: 0x00000000

psg0_chb_tone_period_fine

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Channel B fine tone period adjustment.

Back to Register map.

PSG0_CHB_TONE_PERIOD_COARSE¶

Channel B coarse tone period adjustment.

Address offset: 0x0000000c

Reset value: 0x00000000

psg0_chb_tone_period_coarse

Name	Bits	Mode	Reset	Description
-	31:4	-	0x0000000	Reserved
VALUE	3:0	rw	0x0	Channel B coarse tone period adjustment.

Back to Register map.

PSG0_CHC_TONE_PERIOD_FINE¶

Channel C fine tone period adjustment.

Address offset: 0x00000010

Reset value: 0x00000000

psg0_chc_tone_period_fine

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Channel C fine tone period adjustment.

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PSG0_CHC_TONE_PERIOD_COARSE¶

Channel C coarse tone period adjustment.

Address offset: 0x00000014

Reset value: 0x00000000

psg0_chc_tone_period_coarse

Name	Bits	Mode	Reset	Description
-	31:4	-	0x0000000	Reserved
VALUE	3:0	rw	0x0	Channel C coarse tone period adjustment.

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PSG0_NOISE_PERIOD¶

Noise period.

Address offset: 0x00000018

Reset value: 0x00000000

psg0_noise_period

Name	Bits	Mode	Reset	Description
-	31:5	-	0x000000	Reserved
VALUE	4:0	rw	0x0	Noise period.

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PSG0_DISABLE¶

Mixer settings.

Address offset: 0x0000001c

Reset value: 0x00000000

psg0_disable

Name	Bits	Mode	Reset	Description
-	31:6	-	0x000000	Reserved
NOISE_C	5	rw	0x0	Channel C noise disable.
NOISE_B	4	rw	0x0	Channel B noise disable.
NOISE_A	3	rw	0x0	Channel A noise disable.
TONE_C	2	rw	0x0	Channel C tone disable.
TONE_B	1	rw	0x0	Channel B tone disable.
TONE_A	0	rw	0x0	Channel A tone disable.

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PSG0_CHA_LVL¶

Channel A level control.

Address offset: 0x00000020

Reset value: 0x00000000

psg0_cha_lvl

Name	Bits	Mode	Reset	Description
-	31:5	-	0x000000	Reserved
MODE	4	rw	0x0	Mode.
LVL	3:0	rw	0x0	Level selection.

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PSG0_CHB_LVL¶

Channel B level control.

Address offset: 0x00000024

Reset value: 0x00000000

psg0_chb_lvl

Name	Bits	Mode	Reset	Description
-	31:5	-	0x000000	Reserved
MODE	4	rw	0x0	Mode.
LVL	3:0	rw	0x0	Level selection.

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PSG0_CHC_LVL¶

Channel C level control.

Address offset: 0x00000028

Reset value: 0x00000000

psg0_chc_lvl

Name	Bits	Mode	Reset	Description
-	31:5	-	0x000000	Reserved
MODE	4	rw	0x0	Mode.
LVL	3:0	rw	0x0	Level selection.

Back to Register map.

PSG0_ENV_PERIOD_FINE¶

Envelope frequency fine adjustment.

Address offset: 0x0000002c

Reset value: 0x00000000

psg0_env_period_fine

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Envelope frequency fine adjustment.

Back to Register map.

PSG0_ENV_PERIOD_COARSE¶

Envelope frequeny coarse adjustment.

Address offset: 0x00000030

Reset value: 0x00000000

psg0_env_period_coarse

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Envelope frequency coarse adjustment.

Back to Register map.

PSG0_ENV_SHAPE¶

Envelope shape.

Address offset: 0x00000034

Reset value: 0x00000000

psg0_env_shape

Name	Bits	Mode	Reset	Description
-	31:4	-	0x0000000	Reserved
VALUE	3:0	rw	0x0	Envelope shape.

Back to Register map.

PSG1_CHA_TONE_PERIOD_FINE¶

Channel A fine tone period adjustment.

Address offset: 0x00000040

Reset value: 0x00000000

psg1_cha_tone_period_fine

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Channel A fine tone period adjustment.

Back to Register map.

PSG1_CHA_TONE_PERIOD_COARSE¶

Channel A coarse tone period adjustment.

Address offset: 0x00000044

Reset value: 0x00000000

psg1_cha_tone_period_coarse

Name	Bits	Mode	Reset	Description
-	31:4	-	0x0000000	Reserved
VALUE	3:0	rw	0x0	Channel A coarse tone period adjustment.

Back to Register map.

PSG1_CHB_TONE_PERIOD_FINE¶

Channel B fine tone period adjustment.

Address offset: 0x00000048

Reset value: 0x00000000

psg1_chb_tone_period_fine

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Channel B fine tone period adjustment.

Back to Register map.

PSG1_CHB_TONE_PERIOD_COARSE¶

Channel B coarse tone period adjustment.

Address offset: 0x0000004c

Reset value: 0x00000000

psg1_chb_tone_period_coarse

Name	Bits	Mode	Reset	Description
-	31:4	-	0x0000000	Reserved
VALUE	3:0	rw	0x0	Channel B coarse tone period adjustment.

Back to Register map.

PSG1_CHC_TONE_PERIOD_FINE¶

Channel C fine tone period adjustment.

Address offset: 0x00000050

Reset value: 0x00000000

psg1_chc_tone_period_fine

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Channel C fine tone period adjustment.

Back to Register map.

PSG1_CHC_TONE_PERIOD_COARSE¶

Channel C coarse tone period adjustment.

Address offset: 0x00000054

Reset value: 0x00000000

psg1_chc_tone_period_coarse

Name	Bits	Mode	Reset	Description
-	31:4	-	0x0000000	Reserved
VALUE	3:0	rw	0x0	Channel C coarse tone period adjustment.

Back to Register map.

PSG1_NOISE_PERIOD¶

Noise period.

Address offset: 0x00000058

Reset value: 0x00000000

psg1_noise_period

Name	Bits	Mode	Reset	Description
-	31:5	-	0x000000	Reserved
VALUE	4:0	rw	0x0	Noise period.

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PSG1_DISABLE¶

Mixer settings.

Address offset: 0x0000005c

Reset value: 0x00000000

psg1_disable

Name	Bits	Mode	Reset	Description
-	31:6	-	0x000000	Reserved
NOISE_C	5	rw	0x0	Channel C noise disable.
NOISE_B	4	rw	0x0	Channel B noise disable.
NOISE_A	3	rw	0x0	Channel A noise disable.
TONE_C	2	rw	0x0	Channel C tone disable.
TONE_B	1	rw	0x0	Channel B tone disable.
TONE_A	0	rw	0x0	Channel A tone disable.

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PSG1_CHA_LVL¶

Channel A level control.

Address offset: 0x00000060

Reset value: 0x00000000

psg1_cha_lvl

Name	Bits	Mode	Reset	Description
-	31:5	-	0x000000	Reserved
MODE	4	rw	0x0	Mode.
LVL	3:0	rw	0x0	Level selection.

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PSG1_CHB_LVL¶

Channel B level control.

Address offset: 0x00000064

Reset value: 0x00000000

psg1_chb_lvl

Name	Bits	Mode	Reset	Description
-	31:5	-	0x000000	Reserved
MODE	4	rw	0x0	Mode.
LVL	3:0	rw	0x0	Level selection.

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PSG1_CHC_LVL¶

Channel C level control.

Address offset: 0x00000068

Reset value: 0x00000000

psg1_chc_lvl

Name	Bits	Mode	Reset	Description
-	31:5	-	0x000000	Reserved
MODE	4	rw	0x0	Mode.
LVL	3:0	rw	0x0	Level selection.

Back to Register map.

PSG1_ENV_PERIOD_FINE¶

Envelope frequency fine adjustment.

Address offset: 0x0000006c

Reset value: 0x00000000

psg1_env_period_fine

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Envelope frequency fine adjustment.

Back to Register map.

PSG1_ENV_PERIOD_COARSE¶

Envelope frequeny coarse adjustment.

Address offset: 0x00000070

Reset value: 0x00000000

psg1_env_period_coarse

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Envelope frequency coarse adjustment.

Back to Register map.

PSG1_ENV_SHAPE¶

Envelope shape.

Address offset: 0x00000074

Reset value: 0x00000000

psg1_env_shape

Name	Bits	Mode	Reset	Description
-	31:4	-	0x0000000	Reserved
VALUE	3:0	rw	0x0	Envelope shape.

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FILTER_MIXER_VOLA¶

Filter mixer PSG0 channel A volume.

Address offset: 0x00000200

Reset value: 0x00000000

filter_mixer_vola

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Filter mixer PSG0 channel A volume.

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FILTER_MIXER_VOLB¶

Filter mixer PSG0 channel B volume.

Address offset: 0x00000204

Reset value: 0x00000000

filter_mixer_volb

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Filter mixer PSG0 channel B volume.

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FILTER_MIXER_VOLC¶

Filter mixer PSG0 channel C volume.

Address offset: 0x00000208

Reset value: 0x00000000

filter_mixer_volc

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Filter mixer PSG0 channel C volume.

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FILTER_MIXER_VOLD¶

Filter mixer PSG1 channel A volume.

Address offset: 0x0000020c

Reset value: 0x00000000

filter_mixer_vold

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Filter mixer PSG1 channel A volume.

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FILTER_MIXER_VOLE¶

Filter mixer PSG1 channel B volume.

Address offset: 0x00000210

Reset value: 0x00000000

filter_mixer_vole

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Filter mixer PSG1 channel B volume.

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FILTER_MIXER_VOLF¶

Filter mixer PSG1 channel C volume.

Address offset: 0x00000214

Reset value: 0x00000000

filter_mixer_volf

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Filter mixer PSG1 channel C volume.

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FILTER_MIXER_MVOL¶

Filter mixer master volume.

Address offset: 0x00000218

Reset value: 0x00000000

filter_mixer_mvol

Name	Bits	Mode	Reset	Description
-	31:8	-	0x000000	Reserved
VALUE	7:0	rw	0x00	Filter mixer master volume.

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FILTER_MIXER_INV¶

Filter mixer channel inverter

Address offset: 0x0000021c

Reset value: 0x00000000

filter_mixer_inv

Name	Bits	Mode	Reset	Description
-	31:6	-	0x000000	Reserved
INVF	5	rw	0x0	Invert PSG1 channel C.
INVE	4	rw	0x0	Invert PSG1 channel B.
INVD	3	rw	0x0	Invert PSG1 channel A.
INVC	2	rw	0x0	Invert PSG0 channel C.
INVB	1	rw	0x0	Invert PSG0 channel B.
INVA	0	rw	0x0	Invert PSG0 channel A.