Apple-2-Tools/4cade
1
0
Fork 0
mirror of https://github.com/a2-4am/4cade.git synced 2025-08-07 18:25:24 +00:00
Code Issues Projects Releases Wiki Activity

Fastchip sound setting fix (#94)

Browse Source
This commit is contained in:
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
Download Patch File Download Diff File Expand all files Collapse all files

19
src/hw.accel.a Normal file → Executable file
View File

@@ -118,13 +118,15 @@ EX_3MHZMASK = $C0 ; 3.6Mhz
; FASTChip ; FASTChip
fc_lock = $C06A fc_lock = $C06A
FC_UNLOCK = $6A ; write 4 times
FC_LOCK = $A6
fc_enable = $C06B fc_enable = $C06B
fc_config = $C06E fc_config = $C06E
fc_data = $C06F fc_data = $C06F
FC_UNLOCK = $6A ; write 4 times
FC_LOCK = $A6
FC_1MHZ = 9 FC_1MHZ = 9
FC_ON = 40 ; doco says 16.6Mhz FC_ON = 40 ; doco says 16.6Mhz
FC_SPKR = 2
FC_HIFI = 4
; TransWarp I ; TransWarp I
; may overlap with paddle trigger ; may overlap with paddle trigger
@@ -213,6 +215,19 @@ build_setspeed
rts rts
build_addon 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 lda #<addon
ldy #>addon ldy #>addon
ldx #(end_addon-addon) ldx #(end_addon-addon)