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ootw: add mockingboard sound to the ending
This commit is contained in:
parent
9cc71625ba
commit
da080ca97c
@ -274,6 +274,7 @@ ENDING: ending.o
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ld65 -o ENDING ending.o -C ../linker_scripts/apple2_1700.inc
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ending.o: ending.s \
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pt3_lib.s mockingboard_a.s pt3_setup.s interrupt_handler.s \
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ootw_graphics/l15final/ootw_c15_final.inc \
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ootw_graphics/l16end/ootw_c16_end.inc
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ca65 -o ending.o ending.s -l ending.lst
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@ -90,6 +90,20 @@ ending:
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; ending sequence
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;============================
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;=========================
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; set up sound
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;=========================
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jsr pt3_setup
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cli ; enable interrupts
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;=========================
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; set up bg
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;=========================
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lda #>(sky_bg_rle)
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sta GBASH
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lda #<(sky_bg_rle)
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@ -185,17 +199,22 @@ wait_until_keypressed:
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.include "gr_unrle.s"
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.include "gr_fast_clear.s"
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.include "gr_copy.s"
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;.include "gr_copy_offset.s"
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;.include "gr_putsprite.s"
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;.include "gr_putsprite_flipped.s"
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;.include "gr_putsprite_crop.s"
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.include "gr_offsets.s"
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;.include "gr_offsets_hl.s"
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;.include "gr_hlin.s"
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;.include "keyboard.s"
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.include "gr_overlay.s"
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.include "pt3_setup.s"
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.include "pt3_lib.s"
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.include "interrupt_handler.s"
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.include "mockingboard_a.s"
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; backgrounds
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.include "ootw_graphics/l15final/ootw_c15_final.inc"
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.include "ootw_graphics/l16end/ootw_c16_end.inc"
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PT3_LOC = song
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; must be page aligned
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.align 256
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song:
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.incbin "ootw_audio/ootw_intro.pt3"
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167
ootw/interrupt_handler.s
Normal file
167
ootw/interrupt_handler.s
Normal file
@ -0,0 +1,167 @@
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;================================
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;================================
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; mockingboard interrupt handler
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;================================
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;================================
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; On Apple II/6502 the interrupt handler jumps to address in 0xfffe
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; This is in the ROM, which saves the registers
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; on older IIe it saved A to $45 (which could mess with DISK II)
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; newer IIe doesn't do that.
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; It then calculates if it is a BRK or not (which trashes A)
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; Then it sets up the stack like an interrupt and calls 0x3fe
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; Note: the IIc is much more complicated
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; its firmware tries to decode the proper source
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; based on various things, including screen hole values
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; we bypass that by switching out ROM and replacing the
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; $fffe vector with this, but that does mean we have
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; to be sure status flag and accumulator set properly
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interrupt_handler:
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php ; save status flags
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pha ; save A ; 3
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; A is saved in $45 by firmware
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txa
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pha ; save X
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tya
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pha ; save Y
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; inc $0404 ; debug (flashes char onscreen)
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bit $C404 ; clear 6522 interrupt by reading T1C-L ; 4
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lda DONE_PLAYING ; 3
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beq pt3_play_music ; if song done, don't play music ; 3/2nt
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jmp exit_interrupt ; 3
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;============
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; 13
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pt3_play_music:
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; decode a frame of music
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jsr pt3_make_frame
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; handle song over condition
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lda DONE_SONG
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beq mb_write_frame ; if not done, continue
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lda LOOP ; see if looping
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beq move_to_next
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pt3_loop_smc:
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lda #0 ; looping, move to loop location
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sta current_pattern
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lda #$0
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sta current_line
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sta current_subframe
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sta DONE_SONG ; undo the next song
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beq done_interrupt ; branch always
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move_to_next:
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; same as "press right"
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ldx #$20
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jmp quiet_exit
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;======================================
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; Write frames to Mockingboard
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;======================================
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; for speed could merge this into
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; the decode code
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mb_write_frame:
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tax ; set up reg count ; 2
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;============
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; 2
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;==================================
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; loop through the 14 registers
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; reading the value, then write out
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;==================================
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mb_write_loop:
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lda AY_REGISTERS,X ; load register value ; 4
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; special case R13. If it is 0xff, then don't update
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; otherwise might spuriously reset the envelope settings
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cpx #13 ; 2
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bne mb_not_13 ; 3/2nt
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cmp #$ff ; 2
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beq mb_skip_13 ; 3/2nt
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;============
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; typ 5
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mb_not_13:
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; address
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stx MOCK_6522_ORA1 ; put address on PA1 ; 4
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stx MOCK_6522_ORA2 ; put address on PA2 ; 4
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lda #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
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sta MOCK_6522_ORB1 ; latch_address on PB1 ; 4
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sta MOCK_6522_ORB2 ; latch_address on PB2 ; 4
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ldy #MOCK_AY_INACTIVE ; go inactive ; 2
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sty MOCK_6522_ORB1 ; 4
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sty MOCK_6522_ORB2 ; 4
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; value
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lda AY_REGISTERS,X ; load register value ; 4
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sta MOCK_6522_ORA1 ; put value on PA1 ; 4
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sta MOCK_6522_ORA2 ; put value on PA2 ; 4
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lda #MOCK_AY_WRITE ; ; 2
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sta MOCK_6522_ORB1 ; write on PB1 ; 4
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sta MOCK_6522_ORB2 ; write on PB2 ; 4
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sty MOCK_6522_ORB1 ; 4
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sty MOCK_6522_ORB2 ; 4
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;===========
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; 60
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mb_no_write:
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inx ; point to next register ; 2
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cpx #14 ; if 14 we're done ; 2
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bmi mb_write_loop ; otherwise, loop ; 3/2nt
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;============
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; 7
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mb_skip_13:
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jmp exit_interrupt
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;=================================
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; Finally done with this interrupt
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;=================================
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done_interrupt:
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quiet_exit:
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stx DONE_PLAYING
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jsr clear_ay_both
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;ldx #$ff ; also mute the channel
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stx AY_REGISTERS+7 ; just in case
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done_key:
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exit_interrupt:
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pla
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tay ; restore Y
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pla
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tax ; restore X
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pla ; restore a ; 4
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; on II+/IIe (but not IIc) we need to do this?
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interrupt_smc:
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lda $45 ; restore A
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plp
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rti ; return from interrupt ; 6
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;============
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; typical
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; ???? cycles
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241
ootw/mockingboard_a.s
Normal file
241
ootw/mockingboard_a.s
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@ -0,0 +1,241 @@
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; Mockingboad programming:
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; + Has two 6522 I/O chips connected to two AY-3-8910 chips
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; + Optionally has some speech chips controlled via the outport on the AY
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; + Often in slot 4
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; TODO: how to auto-detect?
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; References used:
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; http://macgui.com/usenet/?group=2&id=8366
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; 6522 Data Sheet
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; AY-3-8910 Data Sheet
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;========================
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; Mockingboard card
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; Essentially two 6522s hooked to the Apple II bus
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; Connected to AY-3-8910 chips
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; PA0-PA7 on 6522 connected to DA0-DA7 on AY
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; PB0 on 6522 connected to BC1
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; PB1 on 6522 connected to BDIR
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; PB2 on 6522 connected to RESET
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; left speaker
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MOCK_6522_ORB1 = $C400 ; 6522 #1 port b data
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MOCK_6522_ORA1 = $C401 ; 6522 #1 port a data
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MOCK_6522_DDRB1 = $C402 ; 6522 #1 data direction port B
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MOCK_6522_DDRA1 = $C403 ; 6522 #1 data direction port A
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; right speaker
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MOCK_6522_ORB2 = $C480 ; 6522 #2 port b data
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MOCK_6522_ORA2 = $C481 ; 6522 #2 port a data
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MOCK_6522_DDRB2 = $C482 ; 6522 #2 data direction port B
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MOCK_6522_DDRA2 = $C483 ; 6522 #2 data direction port A
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; AY-3-8910 commands on port B
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; RESET BDIR BC1
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MOCK_AY_RESET = $0 ; 0 0 0
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MOCK_AY_INACTIVE = $4 ; 1 0 0
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MOCK_AY_READ = $5 ; 1 0 1
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MOCK_AY_WRITE = $6 ; 1 1 0
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MOCK_AY_LATCH_ADDR = $7 ; 1 1 1
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;========================
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; Mockingboard Init
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;========================
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; Initialize the 6522s
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; set the data direction for all pins of PortA/PortB to be output
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mockingboard_init:
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lda #$ff ; all output (1)
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sta MOCK_6522_DDRB1
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sta MOCK_6522_DDRA1
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sta MOCK_6522_DDRB2
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sta MOCK_6522_DDRA2
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rts
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;======================
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; Reset Left AY-3-8910
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;======================
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reset_ay_both:
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lda #MOCK_AY_RESET
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sta MOCK_6522_ORB1
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lda #MOCK_AY_INACTIVE
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sta MOCK_6522_ORB1
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;======================
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; Reset Right AY-3-8910
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;======================
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;reset_ay_right:
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;could be merged with both
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lda #MOCK_AY_RESET
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sta MOCK_6522_ORB2
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lda #MOCK_AY_INACTIVE
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sta MOCK_6522_ORB2
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rts
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; Write sequence
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; Inactive -> Latch Address -> Inactive -> Write Data -> Inactive
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;=========================================
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; Write Right/Left to save value AY-3-8910
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;=========================================
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; register in X
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; value in MB_VALUE
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write_ay_both:
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; address
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stx MOCK_6522_ORA1 ; put address on PA1 ; 3
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stx MOCK_6522_ORA2 ; put address on PA2 ; 3
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lda #MOCK_AY_LATCH_ADDR ; latch_address on PB1 ; 2
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sta MOCK_6522_ORB1 ; latch_address on PB1 ; 3
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sta MOCK_6522_ORB2 ; latch_address on PB2 ; 3
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ldy #MOCK_AY_INACTIVE ; go inactive ; 2
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sty MOCK_6522_ORB1 ; 3
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sty MOCK_6522_ORB2 ; 3
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; value
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lda MB_VALUE ; 3
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sta MOCK_6522_ORA1 ; put value on PA1 ; 3
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sta MOCK_6522_ORA2 ; put value on PA2 ; 3
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lda #MOCK_AY_WRITE ; ; 2
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sta MOCK_6522_ORB1 ; write on PB1 ; 3
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sta MOCK_6522_ORB2 ; write on PB2 ; 3
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sty MOCK_6522_ORB1 ; 3
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sty MOCK_6522_ORB2 ; 3
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rts ; 6
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;===========
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; 51
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;=======================================
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; clear ay -- clear all 14 AY registers
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; should silence the card
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;=======================================
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clear_ay_both:
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ldx #14
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lda #0
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sta MB_VALUE
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clear_ay_left_loop:
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jsr write_ay_both
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dex
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bpl clear_ay_left_loop
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rts
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;=======================================
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; Detect a Mockingboard card
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;=======================================
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; Based on code from the French Touch "Pure Noise" Demo
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; Attempts to time an instruction sequence with a 6522
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;
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; If found, puts in bMB
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; MB_ADDRL:MB_ADDRH has address of Mockingboard
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; returns X=0 if not found, X=1 if found
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mockingboard_detect:
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lda #0
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sta MB_ADDRL
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mb_detect_loop: ; self-modifying
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lda #$07 ; we start in slot 7 ($C7) and go down to 0 ($C0)
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ora #$C0 ; make it start with C
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sta MB_ADDRH
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ldy #04 ; $CX04
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ldx #02 ; 2 tries?
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mb_check_cycle_loop:
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lda (MB_ADDRL),Y ; timer 6522 (Low Order Counter)
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; count down
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sta TEMP ; 3 cycles
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lda (MB_ADDRL),Y ; + 5 cycles = 8 cycles
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; between the two accesses to the timer
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sec
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sbc TEMP ; subtract to see if we had 8 cycles
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cmp #$f8 ; -8
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bne mb_not_in_this_slot
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dex ; decrement, try one more time
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bne mb_check_cycle_loop ; loop detection
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inx ; Mockingboard found (X=1)
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done_mb_detect:
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;stx bMB ; store result to bMB
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rts ; return
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mb_not_in_this_slot:
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dec mb_detect_loop+1 ; decrement the "slot" (self_modify)
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bne mb_detect_loop ; loop down to one
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ldx #00
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beq done_mb_detect
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;alternative MB detection from Nox Archaist
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; lda #$04
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; sta MB_ADDRL
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; ldx #$c7
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;
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;find_mb:
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; stx MB_ADDRH
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;
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; ;detect sound I
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;
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; sec
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; ldy #$00
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; lda (MB_ADDRL), y
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; sbc (MB_ADDRL), y
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; cmp #$05
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; beq found_mb
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; dex
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; cpx #$c0
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; bne find_mb
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; ldx #$00 ;no mockingboard found
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; rts
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;
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;found_mb:
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; ldx #$01 ;mockingboard found
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; rts
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;
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; ;optionally detect sound II
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;
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; sec
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; ldy #$80
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; lda (MB_ADDRL), y
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; sbc (MB_ADDRL), y
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; cmp #$05
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; beq found_mb
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;=======================================
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; Detect a Mockingboard card in Slot4
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;=======================================
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; Based on code from the French Touch "Pure Noise" Demo
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; Attempts to time an instruction sequence with a 6522
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;
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; MB_ADDRL:MB_ADDRH has address of Mockingboard
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; returns X=0 if not found, X=1 if found
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mockingboard_detect_slot4:
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lda #0
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sta MB_ADDRL
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mb4_detect_loop: ; self-modifying
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lda #$04 ; we're only looking in Slot 4
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ora #$C0 ; make it start with C
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sta MB_ADDRH
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ldy #04 ; $CX04
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ldx #02 ; 2 tries?
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mb4_check_cycle_loop:
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lda (MB_ADDRL),Y ; timer 6522 (Low Order Counter)
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; count down
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sta TEMP ; 3 cycles
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lda (MB_ADDRL),Y ; + 5 cycles = 8 cycles
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; between the two accesses to the timer
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sec
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sbc TEMP ; subtract to see if we had 8 cycles
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cmp #$f8 ; -8
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bne mb4_not_in_this_slot
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dex ; decrement, try one more time
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bne mb4_check_cycle_loop ; loop detection
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inx ; Mockingboard found (X=1)
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done_mb4_detect:
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rts ; return
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mb4_not_in_this_slot:
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ldx #00
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beq done_mb4_detect
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2342
ootw/pt3_lib.s
Normal file
2342
ootw/pt3_lib.s
Normal file
File diff suppressed because it is too large
Load Diff
168
ootw/pt3_setup.s
Normal file
168
ootw/pt3_setup.s
Normal file
@ -0,0 +1,168 @@
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;=============================
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; Setup
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;=============================
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pt3_setup:
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;===========================
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; Check for Apple II/II+/IIc
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;===========================
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; this is used to see if we have lowecase support
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lda $FBB3 ; IIe and newer is $06
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cmp #6
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beq apple_iie_or_newer
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lda #1 ; set if older than a IIe
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sta apple_ii
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jmp done_apple_detect
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apple_iie_or_newer:
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lda $FBC0 ; 0 on a IIc
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bne done_apple_detect
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apple_iic:
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; activate IIc mockingboard?
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; this might only be necessary to allow detection
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; I get the impression the Mockingboard 4c activates
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; when you access any of the 6522 ports in Slot 4
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lda #$ff
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sta $C403
|
||||
sta $C404
|
||||
|
||||
; bypass the firmware interrupt handler
|
||||
; should we do this on IIe too? probably faster
|
||||
|
||||
sei ; disable interrupts
|
||||
lda $c08b ; disable ROM (enable language card)
|
||||
lda $c08b
|
||||
lda #<interrupt_handler
|
||||
sta $fffe
|
||||
lda #>interrupt_handler
|
||||
sta $ffff
|
||||
|
||||
lda #$EA ; nop out the "lda $45" in the irq hand
|
||||
sta interrupt_smc
|
||||
sta interrupt_smc+1
|
||||
|
||||
done_apple_detect:
|
||||
|
||||
;===============
|
||||
; init variables
|
||||
;===============
|
||||
|
||||
lda #0
|
||||
sta DONE_PLAYING
|
||||
sta LOOP
|
||||
|
||||
;=======================
|
||||
; Detect mockingboard
|
||||
;========================
|
||||
|
||||
; Note, we do this, but then ignore it, as sometimes
|
||||
; the test fails and then you don't get music.
|
||||
; In theory this could do bad things if you had something
|
||||
; easily confused in slot4, but that's probably not an issue.
|
||||
|
||||
; print detection message
|
||||
|
||||
; lda #<mocking_message ; load loading message
|
||||
; sta OUTL
|
||||
; lda #>mocking_message
|
||||
; sta OUTH
|
||||
; jsr move_and_print ; print it
|
||||
|
||||
jsr mockingboard_detect_slot4 ; call detection routine
|
||||
cpx #$1
|
||||
beq mockingboard_found
|
||||
|
||||
; lda #<not_message ; if not found, print that
|
||||
; sta OUTL
|
||||
; lda #>not_message
|
||||
; sta OUTH
|
||||
; inc CV
|
||||
; jsr move_and_print
|
||||
|
||||
; jmp forever_loop ; and wait forever
|
||||
|
||||
mockingboard_found:
|
||||
; lda #<found_message ; print found message
|
||||
; sta OUTL
|
||||
; lda #>found_message
|
||||
; sta OUTH
|
||||
; inc CV
|
||||
; jsr move_and_print
|
||||
|
||||
;============================
|
||||
; Init the Mockingboard
|
||||
;============================
|
||||
|
||||
jsr mockingboard_init
|
||||
jsr reset_ay_both
|
||||
jsr clear_ay_both
|
||||
|
||||
;=========================
|
||||
; Setup Interrupt Handler
|
||||
;=========================
|
||||
; Vector address goes to 0x3fe/0x3ff
|
||||
; FIXME: should chain any existing handler
|
||||
|
||||
lda #<interrupt_handler
|
||||
sta $03fe
|
||||
lda #>interrupt_handler
|
||||
sta $03ff
|
||||
|
||||
;============================
|
||||
; Enable 50Hz clock on 6522
|
||||
;============================
|
||||
|
||||
sei ; disable interrupts just in case
|
||||
|
||||
lda #$40 ; Continuous interrupts, don't touch PB7
|
||||
sta $C40B ; ACR register
|
||||
lda #$7F ; clear all interrupt flags
|
||||
sta $C40E ; IER register (interrupt enable)
|
||||
|
||||
lda #$C0
|
||||
sta $C40D ; IFR: 1100, enable interrupt on timer one oflow
|
||||
sta $C40E ; IER: 1100, enable timer one interrupt
|
||||
|
||||
lda #$E7
|
||||
sta $C404 ; write into low-order latch
|
||||
lda #$4f
|
||||
sta $C405 ; write into high-order latch,
|
||||
; load both values into counter
|
||||
; clear interrupt and start counting
|
||||
|
||||
; 4fe7 / 1e6 = .020s, 50Hz
|
||||
|
||||
|
||||
;==================
|
||||
; init song
|
||||
;==================
|
||||
|
||||
jsr pt3_init_song
|
||||
|
||||
rts
|
||||
|
||||
;==============================-=========
|
||||
;========================================
|
||||
|
||||
; Helper routines below
|
||||
|
||||
;========================================
|
||||
;========================================
|
||||
|
||||
;=========
|
||||
; vars
|
||||
;=========
|
||||
|
||||
time_frame: .byte $0
|
||||
apple_ii: .byte $0
|
||||
|
||||
;=========
|
||||
; strings
|
||||
;=========
|
||||
;mocking_message: .asciiz "LOOKING FOR MOCKINGBOARD IN SLOT #4"
|
||||
not_message: .byte "NOT "
|
||||
found_message: .asciiz "FOUND"
|
||||
;done_message: .asciiz "DONE PLAYING"
|
||||
|
56
ootw/zp.inc
56
ootw/zp.inc
@ -56,10 +56,10 @@ LETTERD = $67
|
||||
LETTER = $68
|
||||
BLARGH = $69
|
||||
|
||||
INTRO_REPEAT = $7E ; INTRO
|
||||
ZPOS = $78
|
||||
|
||||
REGISTER_DUMP = $70
|
||||
;ZPOS = $78
|
||||
|
||||
AY_REGISTERS = $70
|
||||
A_FINE_TONE = $70
|
||||
A_COARSE_TONE = $71
|
||||
B_FINE_TONE = $72
|
||||
@ -75,46 +75,21 @@ ENVELOPE_FINE = $7B
|
||||
ENVELOPE_COARSE = $7C
|
||||
ENVELOPE_SHAPE = $7D
|
||||
|
||||
PATTERN_L = $7E
|
||||
PATTERN_H = $7F
|
||||
ORNAMENT_L = $80
|
||||
ORNAMENT_H = $81
|
||||
SAMPLE_L = $82
|
||||
SAMPLE_H = $83
|
||||
|
||||
COPY_OFFSET = $7E
|
||||
DECODER_STATE = $7F
|
||||
LOOP = $84
|
||||
MB_VALUE = $85
|
||||
MB_ADDRL = $86
|
||||
MB_ADDRH = $87
|
||||
DONE_PLAYING = $88
|
||||
DONE_SONG = $89
|
||||
|
||||
|
||||
REGISTER_DUMP2 = $80
|
||||
A_FINE_TONE2 = $80
|
||||
A_COARSE_TONE2 = $81
|
||||
B_FINE_TONE2 = $82
|
||||
B_COARSE_TONE2 = $83
|
||||
C_FINE_TONE2 = $84
|
||||
C_COARSE_TONE2 = $85
|
||||
NOISE2 = $86
|
||||
ENABLE2 = $87
|
||||
A_VOLUME2 = $88
|
||||
B_VOLUME2 = $89
|
||||
C_VOLUME2 = $8A
|
||||
ENVELOPE_FINE2 = $8B
|
||||
ENVELOPE_COARS2 = $8C
|
||||
ENVELOPE_SHAPE2 = $8D
|
||||
LYRICSL = $8E
|
||||
LYRICSH = $8F
|
||||
|
||||
FRAME_COUNT = $90
|
||||
MB_VALUE = $91
|
||||
MB_ADDRL = $91
|
||||
MB_ADDRH = $92
|
||||
DONE_PLAYING = $93
|
||||
MB_CHUNK_OFFSET = $94
|
||||
MB_FRAME = $94
|
||||
MB_PATTERN = $95
|
||||
CHUNKSIZE = $95
|
||||
LZ4_DONE = $96
|
||||
;DECODE_ERROR = $97
|
||||
;COPY_TIME = $98
|
||||
;DECOMPRESS_TIME = $99
|
||||
;TIME_TAKEN = $9A
|
||||
;LYRICS_ACTIVE = $9B
|
||||
;FORTYCOL = $9C
|
||||
;CURSOR = $9D
|
||||
|
||||
; More zero-page addresses
|
||||
; we try not to conflict with anything DOS, MONITOR or BASIC related
|
||||
@ -134,6 +109,7 @@ DOOR_XMAX_H = $C9
|
||||
BEAST_ZAPPING = $CA ; 1
|
||||
BEAST_DEAD = $CB ; 1
|
||||
VENT_OPEN = $CC ; 2
|
||||
INTRO_REPEAT = $CD ; INTRO
|
||||
|
||||
LEFT_SHOOT_TARGET = $CF ; ALL
|
||||
RIGHT_SHOOT_TARGET = $D0 ; ALL
|
||||
|
Loading…
Reference in New Issue
Block a user