Apple-2gs-SW/iigs-game-engine
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Tweak noise channel and get APU channel select working

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This commit is contained in:
Lucas Scharenbroich 2023-06-19 10:15:52 -05:00
parent 01d8029125
commit 7b521c8473
2 changed files with 140 additions and 46 deletions
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70
demos/smb/Main.s
View File

@ -197,15 +197,15 @@ EvtLoop
stz nmiCount
; sep #$20
; lda #1
; lda #0
; stal ROMBase+$075f
; stal ROMBase+$0766
; lda #2
; lda #3
; stal ROMBase+$0763
; stal ROMBase+$075c
; lda #2
; lda #4
; stal ROMBase+$0767
; stal ROMBase+$0760
; rep #$30
@ -252,15 +252,59 @@ EvtLoop
sta BGToggle
pha
_GTEEnableBackground
brl EvtLoop
:not_b
cmp #'g' ; Re-enable VBL-drive game logic
bne :not_g
stz singleStepMode
brl EvtLoop
:not_g
cmp #'r' ; Refresh
cmp #'a' ; Show how much time APU simulation is taking
bne :not_a
lda show_border
eor #$0001
sta show_border
brl EvtLoop
:not_a
cmp #'0'
bne :not_0
stz APU_FORCE_OFF
brl EvtLoop
:not_0
cmp #'1'
bne :not_1
lda #$01
jsr ToggleAPUChannel
brl EvtLoop
:not_1
cmp #'2'
bne :not_2
lda #$02
jsr ToggleAPUChannel
brl EvtLoop
:not_2
cmp #'3'
bne :not_3
lda #$04
jsr ToggleAPUChannel
brl EvtLoop
:not_3
cmp #'4'
bne :not_4
lda #$08
jsr ToggleAPUChannel
brl EvtLoop
:not_4
cmp #'r' ; Refresh
bne :not_r
jsr CopyStatus
lda ROMScreenEdge ; global tile index
@ -269,8 +313,9 @@ EvtLoop
ldy #0
jsr CopyNametable
brl EvtLoop
:not_1
cmp #'1'
:not_r
cmp #'v'
bne :not_v
lda ROMScreenEdge
clc
@ -306,6 +351,19 @@ nmiCount dw 0
DPSave dw 0
LastAreaType dw 0
; Toggle an APU control bit
ToggleAPUChannel
pha
lda #$0001
stal APU_FORCE_OFF
pla
sep #$30
eorl APU_STATUS
jsl APU_STATUS_FORCE
rep #$30
rts
; Convert NES palette entries to IIgs
; X = NES palette (16 color indices)
; A = 32 byte array to write results

116
demos/smb/apu.s
View File

@ -108,6 +108,10 @@ copy_instruments_to_doc
lda #$0600
jsr copy_noise
lda #$8000
; jsr gen_noise
rts
;--------------------------
@ -193,6 +197,9 @@ copy_triangle
mx %00
rts
; Generate random data from the NES APU LFSR. Make it long enough to sound good.
gen_noise
copy_noise
sep #$30
mx %11
@ -232,39 +239,39 @@ triangle_wave
hex 60626466686a6c6e70727476787a7c7e
noise_wave
; hex 8f968f763e6fd49ab1e564e295a9bcc9
; hex 717b6629e6970b865dc0e0d840d32a96
; hex 3bd4c5d407b78923d8c9766bea128e8a
; hex c9ee5ddbed3119ff14b4d9a44bfbb7c4
; hex 7a56e26e8aac9ebf1653c0260446231b
; hex 73431495fc585e943edacf8f5bb970e6
; hex 118dc361bee99c98f32d25f06a33715a
; hex 585344f7f3e2f3c36c37cfd78e40147f
; hex a4b20624ac633b42b3aac5407fac4ba9
; hex a4d71a1d020a7757ea244b103f0b7a76
; hex 9b533a60cda31e0fa2ce3491b55c4f26
; hex ea47a61f661deec128129372c3471a9b
; hex f85c3c077168d413184a139440460950
; hex dee3f9bdb65e162b08ed9231a72fb943
; hex 1ba599be80dc2812afa63cc2317cdb1a
; hex 8d99d56327bc50dc975bee94754f561b
hex 8f968f763e6fd49ab1e564e295a9bcc9
hex 717b6629e6970b865dc0e0d840d32a96
hex 3bd4c5d407b78923d8c9766bea128e8a
hex c9ee5ddbed3119ff14b4d9a44bfbb7c4
hex 7a56e26e8aac9ebf1653c0260446231b
hex 73431495fc585e943edacf8f5bb970e6
hex 118dc361bee99c98f32d25f06a33715a
hex 585344f7f3e2f3c36c37cfd78e40147f
hex a4b20624ac633b42b3aac5407fac4ba9
hex a4d71a1d020a7757ea244b103f0b7a76
hex 9b533a60cda31e0fa2ce3491b55c4f26
hex ea47a61f661deec128129372c3471a9b
hex f85c3c077168d413184a139440460950
hex dee3f9bdb65e162b08ed9231a72fb943
hex 1ba599be80dc2812afa63cc2317cdb1a
hex 8d99d56327bc50dc975bee94754f561b
hex 01ffffff0101ffffff01ffff01ff0101
hex ffffffffffff0101ff0101ff01ffff01
hex 01ff0101ffff01ffff0101ff01ff01ff
hex ffffffff0101010101ffff0101ff0101
hex ffffff0101ff01ff010101ff01010101
hex 0101ffffff01ffff01ff01ffff01ffff
hex ff01ffff0101ffff01ffffffffff01ff
hex ffffffffffff010101ffff01ff01ffff
hex 01ffffffff0101ffffffff0101ffff01
hex ff01ff01ff01ffff0101ff01ffffffff
hex ffff010101ffffffff01010101ff0101
hex ffffffffffffff01ff0101ffffff0101
hex 01ff010101ff01ffffffffff01ffffff
hex 01ffffffff010101ff01ffff01ff01ff
hex ffffffff0101ff010101ff01ffffff01
hex 0101010101ffff01ffff01010101ffff
; hex 01ffffff0101ffffff01ffff01ff0101
; hex ffffffffffff0101ff0101ff01ffff01
; hex 01ff0101ffff01ffff0101ff01ff01ff
; hex ffffffff0101010101ffff0101ff0101
; hex ffffff0101ff01ff010101ff01010101
; hex 0101ffffff01ffff01ff01ffff01ffff
; hex ff01ffff0101ffff01ffffffffff01ff
; hex ffffffffffff010101ffff01ff01ffff
; hex 01ffffffff0101ffffffff0101ffff01
; hex ff01ff01ff01ffff0101ff01ffffffff
; hex ffff010101ffffffff01010101ff0101
; hex ffffffffffffff01ff0101ffffff0101
; hex 01ff010101ff01ffffffffff01ffffff
; hex 01ffffffff010101ff01ffff01ff01ff
; hex ffffffff0101ff010101ff01ffffff01
; hex 0101010101ffff01ffff01010101ffff
;--------------------------
@ -757,7 +764,21 @@ interrupt_handler = *
lda #$40+noise_oscillator
sta sound_address
lda #0
:set_volume_noise jsr set_pulse_volume
:set_volume_noise
and #$0F
asl
asl
asl
pha
lda APU_NOISE_REG3 ; Up the volume for low sounds
bit #$08
beq :high_pitch
pla
asl
pha
:high_pitch pla
sta sound_data
:not_timer
ldal show_border
@ -1155,19 +1176,30 @@ APU_NOISE_REG4_WRITE ENT
; Lookup from bottom 4 bits of NOISE_REG3 and pre-calculated ensoniq parameters
NoisePeriodTable dw 4, 8, 16, 32, 64, 96, 128, 160, 202, 254, 380, 508, 762, 1016, 2034, 4068
EsqNoiseFreqTable dw 8704, 4352, 2176, 1088, 544, 363, 272, 218, 172, 137, 92, 69, 46, 34, 17, 9
;EsqNoiseFreqTable dw 8704, 4352, 2176, 1088, 544, 363, 272, 218, 172, 137, 92, 69, 46, 34, 17, 9
EsqNoiseFreqTable dw 1088, 544, 272, 136, 68, 45,34,27,22,17,12,9,6,4,2,1
APU_FORCE_OFF dw 0
APU_STATUS_WRITE ENT
; ldal APU_FORCE_OFF
; bne apu_status_exit
APU_STATUS_FORCE
phb
phk
plb
pha
bra force_entry
APU_STATUS_WRITE ENT
phb
phk
plb
pha
phx
ldx APU_FORCE_OFF
bne force_exit
plx
force_entry
sta APU_STATUS
; From NESDev Wiki: When the enabled bit is cleared (via $4015), the length counter is forced to 0
@ -1200,6 +1232,10 @@ APU_STATUS_FORCE
pla
plb
apu_status_exit
rtl
force_exit
plx
pla
plb
rtl