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Fastchip sound setting fix (#94)

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frankmilliron 2019-12-29 14:42:48 -08:00 committed by 4am
parent 502ef772c0
commit 024d55fac6
1 changed files with 17 additions and 2 deletions
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19
src/hw.accel.a Normal file → Executable file
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@ -118,13 +118,15 @@ EX_3MHZMASK = $C0 ; 3.6Mhz
; FASTChip
fc_lock = $C06A
FC_UNLOCK = $6A ; write 4 times
FC_LOCK = $A6
fc_enable = $C06B
fc_config = $C06E
fc_data = $C06F
FC_UNLOCK = $6A ; write 4 times
FC_LOCK = $A6
FC_1MHZ = 9
FC_ON = 40 ; doco says 16.6Mhz
FC_SPKR = 2
FC_HIFI = 4
; TransWarp I
; may overlap with paddle trigger
@ -213,6 +215,19 @@ build_setspeed
rts
build_addon
lda #FC_UNLOCK ; change Fastchip speaker setting to 'HIFI'
sta fc_lock ; (improves sound on most games)
sta fc_lock ; (setting reverts on power cycle)
sta fc_lock
sta fc_lock
sta fc_enable
lda #FC_SPKR
sta fc_config
lda #FC_HIFI
sta fc_data
lda #FC_LOCK
sta fc_lock
lda #<addon
ldy #>addon
ldx #(end_addon-addon)