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mist: have IIc mockingboard support in theory working

This commit is contained in:
Vince Weaver 2021-09-23 00:39:25 -04:00
parent c508b0d3cd
commit 6b3f31412c
4 changed files with 56 additions and 34 deletions
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33
games/mist/link_book_mist_dock.s
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@ -8,12 +8,43 @@ mist_link_book:
and #SOUND_MOCKINGBOARD
beq skip_turn_off_music
sei ; disable interrupts
; disable interrupts
jsr mockingboard_disable_interrupt
sei
jsr clear_ay_both
skip_turn_off_music:
; load sound effect into language card
; do this late as IIc mockingboard support messes with language card
; update sound status
lda SOUND_STATUS
and #SOUND_IN_LC
beq skip_load_linking_noise
; load sounds into LC
; read ram, write ram, use $d000 bank1
bit $C08B
bit $C08B
lda #<linking_noise_compressed
sta getsrc_smc+1
lda #>linking_noise_compressed
sta getsrc_smc+2
lda #$D0 ; decompress to $D000
jsr decompress_lzsa2_fast
; read rom, nowrite, use $d000 bank1
bit $C08A
skip_load_linking_noise:
; clear screen
lda #0

29
games/mist/mist_title.s
View File

@ -104,33 +104,13 @@ yes_language_card:
ora #SOUND_IN_LC
sta SOUND_STATUS
; load sounds into LC
; read ram, write ram, use $d000 bank1
bit $C08B
bit $C08B
lda #<linking_noise_compressed
sta getsrc_smc+1
lda #>linking_noise_compressed
sta getsrc_smc+2
lda #$D0 ; decompress to $D000
jsr decompress_lzsa2_fast
blah:
; read rom, nowrite, use $d000 bank1
bit $C08A
no_language_card:
;===================================
; Setup Mockingboard
;===================================
PT3_ENABLE_APPLEIIC = 1
PT3_ENABLE_APPLE_IIC = 1
lda #0
sta DONE_PLAYING
@ -811,7 +791,11 @@ get_mist_book:
jsr mockingboard_init
jsr reset_ay_both
jsr mockingboard_setup_interrupt
; jsr mockingboard_setup_interrupt
; to make it work on IIc?
jsr done_iic_hack
jsr pt3_init_song
@ -911,3 +895,4 @@ set_inverse:
rts

21
games/mist/pt3_lib_mockingboard_detect.s
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@ -34,10 +34,17 @@
mockingboard_detect:
; activate IIc mockingboard?
; this might only be necessary to allow detection
; I get the impression the Mockingboard 4c activates
; when you access any of the 6522 ports in Slot 4
; activate Mockingboard IIc
; + the Mockingboard has to take over Slot#4 (IIc has no slots)
; in theory any write to the firmware area in $C400 will
; activate it, but that might not be fast enough when detecting
; so writing $FF to $C403/$C404 is official way to enable
; + Note this disables permanently the mouse firmware in $C400
; so "normal" interrupts are broken :( The hack to fix things
; is to switch in RAM for $F000 and just replace the IRQ
; vectors at $FFFE/$FFFF instead of $3FE/$3FF but that makes
; it difficult if you actually wanted to use any
; Applesoft/Monitor ROM routines
.ifdef PT3_ENABLE_APPLE_IIC
lda APPLEII_MODEL
@ -46,10 +53,10 @@ mockingboard_detect:
lda #$ff
; don't bother patching these, IIc mockingboard always slot 4?
; don't bother patching these, IIc mockingboard always slot 4
sta MOCK_6522_DDRA1
sta MOCK_6522_T1CL
sta MOCK_6522_DDRA1 ; $C403
sta MOCK_6522_T1CL ; $C404
.endif
not_iic:

7
games/mist/pt3_lib_mockingboard_setup.s
View File

@ -182,8 +182,6 @@ mockingboard_setup_interrupt:
sei ; disable interrupts
copy_rom_loop:
lda $c089 ; read ROM, write RAM1
lda $c089
@ -214,11 +212,12 @@ write_rom_loop:
lda #>interrupt_handler
sta $ffff
lda #$EA ; nop out the "lda $45" in the irq handler
; nop out the "lda $45" in the irq handler
lda #$EA
sta interrupt_smc
sta interrupt_smc+1
.endif
done_iic_hack: