mirror of
https://github.com/deater/dos33fsprogs.git
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pt3_player: update to auto-detect mockingboard slot
This commit is contained in:
Vince Weaver
parent
ebd8329600
commit
95aca92cb0
@ -14,10 +14,6 @@ Background:
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This code is meant as a relatively simple, reasonably optimized version
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of the PT3 Vortex-Tracker player for use in other programs.
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A much more optimized version can be found in ../pt3_player/
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That codebase has been *extremely* optimized to the point it's no longer
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very straightforward to reuse the code.
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For some more background on this you can watch the talk I gave
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at Demosplash 2019 on this topic.
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Binary file not shown.
@ -829,7 +829,7 @@ do_onoff:
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do_offon:
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ldy note_a+NOTE_OFFON_DELAY,X ; else a->onoff=a->offon_delay;
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put_offon:
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.ifdef USE_ZERO_PAGE
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.ifdef PT3_USE_ZERO_PAGE
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sty note_a+NOTE_ONOFF,X
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.else
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lda note_a+NOTE_ONOFF,X
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@ -66,14 +66,14 @@ mockingboard_found:
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jsr print_mocking_found
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setup_interrupt:
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;==================================================
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; patch the playing code with the proper slot value
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;==================================================
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jsr mockingboard_patch
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setup_interrupt:
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;=======================
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; Set up 50Hz interrupt
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;========================
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@ -81,7 +81,9 @@ PT3_PLAYER: pt3_player.o
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pt3_player.o: pt3_player.s \
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gr_fast_clear.s random16.s fire.s \
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gr_putsprite.s put_letters.s zp.inc \
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pt3_lib_init.s pt3_lib_core.s interrupt_handler.s
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pt3_lib_init.s pt3_lib_core.s interrupt_handler.s \
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pt3_lib_irq_handler.s \
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pt3_lib_mockingboard_setup.s pt3_lib_mockingboard_detect.s
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ca65 -o pt3_player.o pt3_player.s -l pt3_player.lst
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#
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@ -1,2 +1,2 @@
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10 PRINT "PT3 PLAYER V1.3"
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10 PRINT "PT3 PLAYER V1.4"
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100 PRINT CHR$ (4)"BRUN PT3_PLAYER"
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@ -1,240 +0,0 @@
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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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;=======================================
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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_smc+1
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clear_ay_left_loop:
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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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MB_VALUE_smc:
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lda #$d1 ; 2
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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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;===========
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; 44
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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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@ -232,20 +232,14 @@ note_c:
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end_vars:
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.endif
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; this is only called by lib_init
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load_ornament0_sample1:
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lda #0 ; 2
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jsr load_ornament ; 6
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; fall through
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load_sample1:
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lda #1 ; 2
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;===========================
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;===========================
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; Load Sample
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;===========================
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;===========================
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; sample in A
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; which note offset in X
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@ -260,6 +254,8 @@ load_sample1:
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; Optimization:
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; see comments on ornament setting
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load_sample1:
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lda #1 ; 2
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load_sample:
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@ -2,7 +2,8 @@
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pt3_irq_handler:
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bit $C404 ; clear 6522 interrupt by reading T1C-L ; 4
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pt3_irq_smc1:
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bit MOCK_6522_T1CL ; 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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@ -74,21 +75,27 @@ mb_not_13:
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; address
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pt3_irq_smc2:
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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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ldy #MOCK_AY_LATCH_ADDR ; latch_address for PB1 ; 2
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pt3_irq_smc3:
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sty MOCK_6522_ORB1 ; latch_address on PB1 ; 4
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sty MOCK_6522_ORB2 ; latch_address on PB2 ; 4
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ldy #MOCK_AY_INACTIVE ; go inactive ; 2
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pt3_irq_smc4:
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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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pt3_irq_smc5:
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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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pt3_irq_smc6:
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sta MOCK_6522_ORB1 ; write on PB1 ; 4
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sty MOCK_6522_ORB1 ; 4
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pt3_irq_smc7:
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sta MOCK_6522_ORB2 ; write on PB2 ; 4
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sty MOCK_6522_ORB2 ; 4
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;===========
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314
pt3_player/pt3_lib_mockingboard_detect.s
Normal file
314
pt3_player/pt3_lib_mockingboard_detect.s
Normal file
@ -0,0 +1,314 @@
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;===================================================================
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; code to detect mockingboard
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;===================================================================
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; this isn't always easy
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; my inclination is to just assume slot #4 but that isn't always realistic
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; code below based on "hw.mockingboard.a" from "Total Replay"
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;license:MIT
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; By Andrew Roughan
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; in the style of 4am for Total Replay
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;
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; Mockingboard support functions
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;
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;------------------------------------------------------------------------------
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; HasMockingboard
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; detect Mockingboard card by searching for 6522 timers across all slots
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; access 6522 timers with deterministic cycle counts
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;
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; based on prior art in Mockingboard Developers Toolkit
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; with optimisation from deater/french touch
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; also takes into account FastChip //e clock difference
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;
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; in: none
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; accelerators should be off
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; out: C set if Mockingboard found in any slot
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; if card was found, X = #$Cn where n is the slot number of the card
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; C clear if no Mockingboard found
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; other flags clobbered
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; zp $65-$67 clobbered
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; A/Y clobbered
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;------------------------------------------------------------------------------
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mockingboard_detect:
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lda #$00
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sta MB_ADDR_L
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ldx #$C7 ; start at slot #7
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mb_slot_loop:
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stx MB_ADDR_H
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ldy #$04 ; 6522 #1 $Cx04
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jsr mb_timer_check
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bne mb_next_slot
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ldy #$84 ; 6522 #2 $Cx84
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jsr mb_timer_check
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bne mb_next_slot
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mb_found:
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sec ; found
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rts
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mb_next_slot:
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dex
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cpx #$C0
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bne mb_slot_loop
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clc ; not found
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rts
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mb_timer_check:
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lda (MB_ADDR_L),Y ; read 6522 timer low byte
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sta MB_VALUE
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lda (MB_ADDR_L),Y ; second time
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sec
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sbc MB_VALUE
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cmp #$F8 ; looking for (-)8 cycles between reads
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beq mb_timer_check_done
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cmp #$F7 ; FastChip //e clock is different
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mb_timer_check_done:
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rts
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;===================================================================
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; code to patch mockingboard if not in slot#4
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;===================================================================
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; this is the brute force version, we have to patch 39 locations
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; see further below if you want to try a smaller, more dangerous, patch
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.if 0
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mockingboard_patch:
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lda MB_ADDR_H
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sta pt3_irq_smc1+2 ; 1
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sta pt3_irq_smc2+2 ; 2
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sta pt3_irq_smc2+5 ; 3
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sta pt3_irq_smc3+2 ; 4
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sta pt3_irq_smc3+5 ; 5
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sta pt3_irq_smc4+2 ; 6
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sta pt3_irq_smc4+5 ; 7
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sta pt3_irq_smc5+2 ; 8
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sta pt3_irq_smc5+5 ; 9
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sta pt3_irq_smc6+2 ; 10
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sta pt3_irq_smc6+5 ; 11
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sta pt3_irq_smc7+2 ; 12
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sta pt3_irq_smc7+5 ; 13
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sta mock_init_smc1+2 ; 14
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sta mock_init_smc1+5 ; 15
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sta mock_init_smc2+2 ; 16
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sta mock_init_smc2+5 ; 17
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sta reset_ay_smc1+2 ; 18
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sta reset_ay_smc2+2 ; 19
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sta reset_ay_smc3+2 ; 20
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sta reset_ay_smc4+2 ; 21
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sta write_ay_smc1+2 ; 22
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sta write_ay_smc1+5 ; 23
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sta write_ay_smc2+2 ; 24
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sta write_ay_smc2+5 ; 25
|
||||
|
||||
sta write_ay_smc3+2 ; 26
|
||||
sta write_ay_smc3+5 ; 27
|
||||
|
||||
sta write_ay_smc4+2 ; 28
|
||||
sta write_ay_smc4+5 ; 29
|
||||
|
||||
sta write_ay_smc5+2 ; 30
|
||||
sta write_ay_smc5+5 ; 31
|
||||
|
||||
sta write_ay_smc6+2 ; 32
|
||||
sta write_ay_smc6+5 ; 33
|
||||
|
||||
sta setup_irq_smc1+2 ; 34
|
||||
sta setup_irq_smc2+2 ; 35
|
||||
sta setup_irq_smc3+2 ; 36
|
||||
sta setup_irq_smc4+2 ; 37
|
||||
sta setup_irq_smc5+2 ; 38
|
||||
sta setup_irq_smc6+2 ; 39
|
||||
|
||||
rts
|
||||
.endif
|
||||
|
||||
;===================================================================
|
||||
; dangerous code to patch mockingboard if not in slot#4
|
||||
;===================================================================
|
||||
; this code patches any $C4 value to the proper slot# if not slot4
|
||||
; this can be dangerous, it might over-write other important values
|
||||
; that should be $C4
|
||||
|
||||
; safer ways to do this:
|
||||
; only do this if 2 bytes after a LDA/STA/LDX/STX
|
||||
; count total and if not 39 then print error message
|
||||
|
||||
mockingboard_patch:
|
||||
; from mockingboard_init $1BBF
|
||||
; to done_pt3_irq_handler $1D85
|
||||
|
||||
ldx MB_ADDR_H
|
||||
ldy #0
|
||||
|
||||
lda #<mockingboard_init
|
||||
sta MB_ADDR_L
|
||||
lda #>mockingboard_init
|
||||
sta MB_ADDR_H
|
||||
|
||||
mb_patch_loop:
|
||||
lda (MB_ADDR_L),Y
|
||||
cmp #$C4
|
||||
bne mb_patch_nomatch
|
||||
|
||||
txa
|
||||
sta (MB_ADDR_L),Y
|
||||
mb_patch_nomatch:
|
||||
|
||||
inc MB_ADDR_L
|
||||
lda MB_ADDR_L
|
||||
bne mb_patch_oflo
|
||||
inc MB_ADDR_H
|
||||
|
||||
mb_patch_oflo:
|
||||
lda MB_ADDR_H
|
||||
cmp #>done_pt3_irq_handler
|
||||
bne mb_patch_loop
|
||||
lda MB_ADDR_L
|
||||
cmp #<done_pt3_irq_handler
|
||||
bne mb_patch_loop
|
||||
|
||||
mb_patch_done:
|
||||
rts
|
||||
|
||||
.if 0
|
||||
|
||||
|
||||
;=======================================
|
||||
; Detect a Mockingboard card
|
||||
;=======================================
|
||||
; Based on code from the French Touch "Pure Noise" Demo
|
||||
; Attempts to time an instruction sequence with a 6522
|
||||
;
|
||||
; If found, puts in bMB
|
||||
; MB_ADDRL:MB_ADDRH has address of Mockingboard
|
||||
; returns X=0 if not found, X=1 if found
|
||||
|
||||
mockingboard_detect:
|
||||
lda #0
|
||||
sta MB_ADDRL
|
||||
|
||||
mb_detect_loop: ; self-modifying
|
||||
lda #$07 ; we start in slot 7 ($C7) and go down to 0 ($C0)
|
||||
ora #$C0 ; make it start with C
|
||||
sta MB_ADDRH
|
||||
ldy #04 ; $CX04
|
||||
ldx #02 ; 2 tries?
|
||||
mb_check_cycle_loop:
|
||||
lda (MB_ADDRL),Y ; timer 6522 (Low Order Counter)
|
||||
; count down
|
||||
sta PT3_TEMP ; 3 cycles
|
||||
lda (MB_ADDRL),Y ; + 5 cycles = 8 cycles
|
||||
; between the two accesses to the timer
|
||||
sec
|
||||
sbc PT3_TEMP ; subtract to see if we had 8 cycles
|
||||
cmp #$f8 ; -8
|
||||
bne mb_not_in_this_slot
|
||||
dex ; decrement, try one more time
|
||||
bne mb_check_cycle_loop ; loop detection
|
||||
inx ; Mockingboard found (X=1)
|
||||
done_mb_detect:
|
||||
;stx bMB ; store result to bMB
|
||||
rts ; return
|
||||
|
||||
mb_not_in_this_slot:
|
||||
dec mb_detect_loop+1 ; decrement the "slot" (self_modify)
|
||||
bne mb_detect_loop ; loop down to one
|
||||
ldx #00
|
||||
beq done_mb_detect
|
||||
|
||||
;alternative MB detection from Nox Archaist
|
||||
; lda #$04
|
||||
; sta MB_ADDRL
|
||||
; ldx #$c7
|
||||
;
|
||||
;find_mb:
|
||||
; stx MB_ADDRH
|
||||
;
|
||||
; ;detect sound I
|
||||
;
|
||||
; sec
|
||||
; ldy #$00
|
||||
; lda (MB_ADDRL), y
|
||||
; sbc (MB_ADDRL), y
|
||||
; cmp #$05
|
||||
; beq found_mb
|
||||
; dex
|
||||
; cpx #$c0
|
||||
; bne find_mb
|
||||
; ldx #$00 ;no mockingboard found
|
||||
; rts
|
||||
;
|
||||
;found_mb:
|
||||
; ldx #$01 ;mockingboard found
|
||||
; rts
|
||||
;
|
||||
; ;optionally detect sound II
|
||||
;
|
||||
; sec
|
||||
; ldy #$80
|
||||
; lda (MB_ADDRL), y
|
||||
; sbc (MB_ADDRL), y
|
||||
; cmp #$05
|
||||
; beq found_mb
|
||||
|
||||
|
||||
;=======================================
|
||||
; Detect a Mockingboard card in Slot4
|
||||
;=======================================
|
||||
; Based on code from the French Touch "Pure Noise" Demo
|
||||
; Attempts to time an instruction sequence with a 6522
|
||||
;
|
||||
; MB_ADDRL:MB_ADDRH has address of Mockingboard
|
||||
; returns X=0 if not found, X=1 if found
|
||||
|
||||
mockingboard_detect_slot4:
|
||||
lda #0
|
||||
sta MB_ADDRL
|
||||
|
||||
mb4_detect_loop: ; self-modifying
|
||||
lda #$04 ; we're only looking in Slot 4
|
||||
ora #$C0 ; make it start with C
|
||||
sta MB_ADDRH
|
||||
ldy #04 ; $CX04
|
||||
ldx #02 ; 2 tries?
|
||||
mb4_check_cycle_loop:
|
||||
lda (MB_ADDRL),Y ; timer 6522 (Low Order Counter)
|
||||
; count down
|
||||
sta PT3_TEMP ; 3 cycles
|
||||
lda (MB_ADDRL),Y ; + 5 cycles = 8 cycles
|
||||
; between the two accesses to the timer
|
||||
sec
|
||||
sbc PT3_TEMP ; subtract to see if we had 8 cycles
|
||||
cmp #$f8 ; -8
|
||||
bne mb4_not_in_this_slot
|
||||
dex ; decrement, try one more time
|
||||
bne mb4_check_cycle_loop ; loop detection
|
||||
inx ; Mockingboard found (X=1)
|
||||
done_mb4_detect:
|
||||
rts ; return
|
||||
|
||||
mb4_not_in_this_slot:
|
||||
ldx #00
|
||||
beq done_mb4_detect
|
||||
|
||||
|
||||
|
||||
.endif
|
||||
250
pt3_player/pt3_lib_mockingboard_setup.s
Normal file
250
pt3_player/pt3_lib_mockingboard_setup.s
Normal file
@ -0,0 +1,250 @@
|
||||
; Mockingboad programming:
|
||||
; + Has two 6522 I/O chips connected to two AY-3-8910 chips
|
||||
; + Optionally has some speech chips controlled via the outport on the AY
|
||||
; + Often in slot 4
|
||||
; TODO: how to auto-detect?
|
||||
; References used:
|
||||
; http://macgui.com/usenet/?group=2&id=8366
|
||||
; 6522 Data Sheet
|
||||
; AY-3-8910 Data Sheet
|
||||
|
||||
;========================
|
||||
; Mockingboard card
|
||||
; Essentially two 6522s hooked to the Apple II bus
|
||||
; Connected to AY-3-8910 chips
|
||||
; PA0-PA7 on 6522 connected to DA0-DA7 on AY
|
||||
; PB0 on 6522 connected to BC1
|
||||
; PB1 on 6522 connected to BDIR
|
||||
; PB2 on 6522 connected to RESET
|
||||
|
||||
|
||||
; left speaker
|
||||
MOCK_6522_ORB1 = $C400 ; 6522 #1 port b data
|
||||
MOCK_6522_ORA1 = $C401 ; 6522 #1 port a data
|
||||
MOCK_6522_DDRB1 = $C402 ; 6522 #1 data direction port B
|
||||
MOCK_6522_DDRA1 = $C403 ; 6522 #1 data direction port A
|
||||
MOCK_6522_T1CL = $C404 ; 6522 #1 t1 low order latches
|
||||
MOCK_6522_T1CH = $C405 ; 6522 #1 t1 high order counter
|
||||
MOCK_6522_T1LL = $C406 ; 6522 #1 t1 low order latches
|
||||
MOCK_6522_T1LH = $C407 ; 6522 #1 t1 high order latches
|
||||
MOCK_6522_T2CL = $C408 ; 6522 #1 t2 low order latches
|
||||
MOCK_6522_T2CH = $C409 ; 6522 #1 t2 high order counters
|
||||
MOCK_6522_SR = $C40A ; 6522 #1 shift register
|
||||
MOCK_6522_ACR = $C40B ; 6522 #1 auxilliary control register
|
||||
MOCK_6522_PCR = $C40C ; 6522 #1 peripheral control register
|
||||
MOCK_6522_IFR = $C40D ; 6522 #1 interrupt flag register
|
||||
MOCK_6522_IER = $C40E ; 6522 #1 interrupt enable register
|
||||
MOCK_6522_ORANH = $C40F ; 6522 #1 port a data no handshake
|
||||
|
||||
|
||||
; right speaker
|
||||
MOCK_6522_ORB2 = $C480 ; 6522 #2 port b data
|
||||
MOCK_6522_ORA2 = $C481 ; 6522 #2 port a data
|
||||
MOCK_6522_DDRB2 = $C482 ; 6522 #2 data direction port B
|
||||
MOCK_6522_DDRA2 = $C483 ; 6522 #2 data direction port A
|
||||
|
||||
; AY-3-8910 commands on port B
|
||||
; RESET BDIR BC1
|
||||
MOCK_AY_RESET = $0 ; 0 0 0
|
||||
MOCK_AY_INACTIVE = $4 ; 1 0 0
|
||||
MOCK_AY_READ = $5 ; 1 0 1
|
||||
MOCK_AY_WRITE = $6 ; 1 1 0
|
||||
MOCK_AY_LATCH_ADDR = $7 ; 1 1 1
|
||||
|
||||
|
||||
;========================
|
||||
; Mockingboard Init
|
||||
;========================
|
||||
; Initialize the 6522s
|
||||
; set the data direction for all pins of PortA/PortB to be output
|
||||
|
||||
mockingboard_init:
|
||||
lda #$ff ; all output (1)
|
||||
|
||||
mock_init_smc1:
|
||||
sta MOCK_6522_DDRB1
|
||||
sta MOCK_6522_DDRA1
|
||||
mock_init_smc2:
|
||||
sta MOCK_6522_DDRB2
|
||||
sta MOCK_6522_DDRA2
|
||||
rts
|
||||
|
||||
;===================================
|
||||
;===================================
|
||||
; Reset Both AY-3-8910s
|
||||
;===================================
|
||||
;===================================
|
||||
|
||||
;======================
|
||||
; Reset Left AY-3-8910
|
||||
;======================
|
||||
reset_ay_both:
|
||||
lda #MOCK_AY_RESET
|
||||
reset_ay_smc1:
|
||||
sta MOCK_6522_ORB1
|
||||
lda #MOCK_AY_INACTIVE
|
||||
reset_ay_smc2:
|
||||
sta MOCK_6522_ORB1
|
||||
|
||||
;======================
|
||||
; Reset Right AY-3-8910
|
||||
;======================
|
||||
;reset_ay_right:
|
||||
;could be merged with both
|
||||
lda #MOCK_AY_RESET
|
||||
reset_ay_smc3:
|
||||
sta MOCK_6522_ORB2
|
||||
lda #MOCK_AY_INACTIVE
|
||||
reset_ay_smc4:
|
||||
sta MOCK_6522_ORB2
|
||||
rts
|
||||
|
||||
|
||||
; Write sequence
|
||||
; Inactive -> Latch Address -> Inactive -> Write Data -> Inactive
|
||||
|
||||
;=========================================
|
||||
; Write Right/Left to save value AY-3-8910
|
||||
;=========================================
|
||||
; register in X
|
||||
; value in MB_VALUE
|
||||
|
||||
write_ay_both:
|
||||
; address
|
||||
|
||||
write_ay_smc1:
|
||||
stx MOCK_6522_ORA1 ; put address on PA1 ; 3
|
||||
stx MOCK_6522_ORA2 ; put address on PA2 ; 3
|
||||
lda #MOCK_AY_LATCH_ADDR ; latch_address on PB1 ; 2
|
||||
write_ay_smc2:
|
||||
sta MOCK_6522_ORB1 ; latch_address on PB1 ; 3
|
||||
sta MOCK_6522_ORB2 ; latch_address on PB2 ; 3
|
||||
ldy #MOCK_AY_INACTIVE ; go inactive ; 2
|
||||
write_ay_smc3:
|
||||
sty MOCK_6522_ORB1 ; 3
|
||||
sty MOCK_6522_ORB2 ; 3
|
||||
|
||||
; value
|
||||
lda MB_VALUE ; 3
|
||||
write_ay_smc4:
|
||||
sta MOCK_6522_ORA1 ; put value on PA1 ; 3
|
||||
sta MOCK_6522_ORA2 ; put value on PA2 ; 3
|
||||
lda #MOCK_AY_WRITE ; ; 2
|
||||
write_ay_smc5:
|
||||
sta MOCK_6522_ORB1 ; write on PB1 ; 3
|
||||
sta MOCK_6522_ORB2 ; write on PB2 ; 3
|
||||
write_ay_smc6:
|
||||
sty MOCK_6522_ORB1 ; 3
|
||||
sty MOCK_6522_ORB2 ; 3
|
||||
|
||||
rts ; 6
|
||||
;===========
|
||||
; 51
|
||||
;=======================================
|
||||
; clear ay -- clear all 14 AY registers
|
||||
; should silence the card
|
||||
;=======================================
|
||||
clear_ay_both:
|
||||
ldx #14
|
||||
lda #0
|
||||
sta MB_VALUE
|
||||
clear_ay_left_loop:
|
||||
jsr write_ay_both
|
||||
dex
|
||||
bpl clear_ay_left_loop
|
||||
rts
|
||||
|
||||
|
||||
;=============================
|
||||
; Setup
|
||||
;=============================
|
||||
mockingboard_setup_interrupt:
|
||||
|
||||
;===========================
|
||||
; Check for Apple IIc
|
||||
;===========================
|
||||
; it does interrupts differently
|
||||
|
||||
lda $FBB3 ; IIe and newer is $06
|
||||
cmp #6
|
||||
beq apple_iie_or_newer
|
||||
|
||||
jmp done_apple_detect
|
||||
apple_iie_or_newer:
|
||||
lda $FBC0 ; 0 on a IIc
|
||||
bne done_apple_detect
|
||||
apple_iic:
|
||||
; activate IIc mockingboard?
|
||||
; this might only be necessary to allow detection
|
||||
; I get the impression the Mockingboard 4c activates
|
||||
; when you access any of the 6522 ports in Slot 4
|
||||
lda #$ff
|
||||
|
||||
; don't bother patching these, IIc mockingboard always slot 4?
|
||||
|
||||
sta MOCK_6522_DDRA1
|
||||
sta MOCK_6522_T1CL
|
||||
|
||||
; 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:
|
||||
|
||||
|
||||
;=========================
|
||||
; 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
|
||||
;============================
|
||||
|
||||
; 4fe7 / 1e6 = .020s, 50Hz
|
||||
|
||||
; 9c40 / 1e6 = .040s, 25Hz
|
||||
; 411a / 1e6 = .016s, 60Hz
|
||||
|
||||
sei ; disable interrupts just in case
|
||||
|
||||
lda #$40 ; Continuous interrupts, don't touch PB7
|
||||
setup_irq_smc1:
|
||||
sta MOCK_6522_ACR ; ACR register
|
||||
lda #$7F ; clear all interrupt flags
|
||||
setup_irq_smc2:
|
||||
sta MOCK_6522_IER ; IER register (interrupt enable)
|
||||
|
||||
lda #$C0
|
||||
setup_irq_smc3:
|
||||
sta MOCK_6522_IFR ; IFR: 1100, enable interrupt on timer one oflow
|
||||
setup_irq_smc4:
|
||||
sta MOCK_6522_IER ; IER: 1100, enable timer one interrupt
|
||||
|
||||
lda #$E7
|
||||
setup_irq_smc5:
|
||||
sta MOCK_6522_T1CL ; write into low-order latch
|
||||
lda #$4f
|
||||
setup_irq_smc6:
|
||||
sta MOCK_6522_T1CH ; write into high-order latch,
|
||||
; load both values into counter
|
||||
; clear interrupt and start counting
|
||||
|
||||
rts
|
||||
Binary file not shown.
@ -36,40 +36,13 @@ pt3_setup:
|
||||
|
||||
lda $FBB3 ; IIe and newer is $06
|
||||
cmp #6
|
||||
beq apple_iie_or_newer
|
||||
beq done_lowecase_smc
|
||||
|
||||
lda #$d0 ; set if older than a IIe
|
||||
sta apple_ii_smc
|
||||
bne done_apple_detect ; branch always
|
||||
apple_iie_or_newer:
|
||||
lda $FBC0 ; 0 on a IIc
|
||||
bne done_apple_detect
|
||||
|
||||
apple_iic:
|
||||
; activate IIc mockingboard?
|
||||
; this might only be necessary to allow detection
|
||||
; I get the impression the Mockingboard 4c activates
|
||||
; when you access any of the 6522 ports in Slot 4
|
||||
lda #$ff
|
||||
sta $C403
|
||||
sta $C404
|
||||
done_lowecase_smc:
|
||||
|
||||
; 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 disk code
|
||||
@ -91,22 +64,9 @@ done_apple_detect:
|
||||
; 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.
|
||||
jsr mockingboard_detect ; call detection routine
|
||||
|
||||
; 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
|
||||
bcs mockingboard_found
|
||||
|
||||
lda #<not_message ; if not found, print that
|
||||
sta OUTL
|
||||
@ -117,6 +77,8 @@ done_apple_detect:
|
||||
|
||||
; jmp forever_loop ; and wait forever
|
||||
|
||||
jmp init_mockingboard ; try anyway in slot#4
|
||||
|
||||
mockingboard_found:
|
||||
; lda #<found_message ; print found message
|
||||
; sta OUTL
|
||||
@ -125,50 +87,28 @@ mockingboard_found:
|
||||
; inc CV
|
||||
; jsr move_and_print
|
||||
|
||||
;==================================================
|
||||
; patch the playing code with the proper slot value
|
||||
;==================================================
|
||||
|
||||
jsr mockingboard_patch
|
||||
|
||||
|
||||
;============================
|
||||
; Init the Mockingboard
|
||||
;============================
|
||||
init_mockingboard:
|
||||
|
||||
; set up 50Hz interrupt
|
||||
|
||||
jsr mockingboard_init
|
||||
jsr mockingboard_setup_interrupt
|
||||
|
||||
; init the mockingboard
|
||||
|
||||
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
|
||||
|
||||
|
||||
;==================
|
||||
; load first song
|
||||
;==================
|
||||
@ -720,7 +660,6 @@ song_list:
|
||||
;=========
|
||||
.include "gr_offsets.s"
|
||||
.include "text_print.s"
|
||||
.include "mockingboard_a.s"
|
||||
.include "gr_fast_clear.s"
|
||||
.include "pageflip.s"
|
||||
.include "gr_setpage.s"
|
||||
@ -731,7 +670,9 @@ song_list:
|
||||
; pt3_lib stuff
|
||||
.include "pt3_lib_core.s"
|
||||
.include "pt3_lib_init.s"
|
||||
.include "pt3_lib_mockingboard_setup.s"
|
||||
.include "interrupt_handler.s"
|
||||
.include "pt3_lib_mockingboard_detect.s"
|
||||
|
||||
; visualization
|
||||
.include "fire.s"
|
||||
|
||||
@ -25,9 +25,8 @@ pt3_setup:
|
||||
sta DONE_PLAYING
|
||||
sta WHICH_FILE
|
||||
|
||||
jsr mockingboard_detect_slot4 ; call detection routine
|
||||
cpx #$1
|
||||
beq mockingboard_found
|
||||
; jsr mockingboard_detect ; call detection routine
|
||||
; bcs mockingboard_found
|
||||
|
||||
|
||||
mockingboard_found:
|
||||
@ -37,43 +36,10 @@ mockingboard_found:
|
||||
;============================
|
||||
|
||||
jsr mockingboard_init
|
||||
jsr mockingboard_setup_interrupt
|
||||
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
|
||||
|
||||
;==================
|
||||
; load first song
|
||||
@ -251,7 +217,7 @@ song_list:
|
||||
;=========
|
||||
;routines
|
||||
;=========
|
||||
.include "mockingboard_a.s"
|
||||
.include "pt3_lib_mockingboard_setup.s"
|
||||
.include "qkumba_rts.s"
|
||||
|
||||
.include "pt3_lib_core.s"
|
||||
@ -434,6 +400,7 @@ exit_interrupt:
|
||||
tay ; restore Y
|
||||
pla
|
||||
tax ; restore X
|
||||
interrupt_smc:
|
||||
lda $45 ; restore A
|
||||
|
||||
|
||||
|
||||
@ -68,11 +68,12 @@ ORNAMENT_H = $03
|
||||
SAMPLE_L = $04
|
||||
SAMPLE_H = $05
|
||||
|
||||
MB_VALUE = $61
|
||||
PT3_TEMP = $62
|
||||
WHICH_FILE = $63
|
||||
LOOP = $64
|
||||
MB_ADDRL = $65
|
||||
MB_ADDRH = $66
|
||||
MB_ADDR_L = $65
|
||||
MB_ADDR_H = $66
|
||||
DONE_PLAYING = $67
|
||||
DONE_SONG = $68
|
||||
FIRE_FB_L = $69
|
||||
|
||||
Loading…
Reference in New Issue
Block a user