201 lines
3.0 KiB
ArmAsm
201 lines
3.0 KiB
ArmAsm
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; Soft Switches
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KEYPRESS= $C000
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KEYRESET= $C010
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SPEAKER= $C030
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COUNTDOWN = $FF
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boop_music:
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jsr boop
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jsr beep
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jsr boop
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end:
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jmp end
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;===========================
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; BEEP
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;===========================
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beep:
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; BEEP
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; repeat 34 times
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lda #34
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sta COUNTDOWN
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tone1_loop:
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jsr play_304
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jsr play_369
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jsr play_32c
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dec COUNTDOWN
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bne tone1_loop
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rts
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;===========================
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; BOOP
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;===========================
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boop:
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; BOOP
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; repeat 34 times
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lda #34
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sta COUNTDOWN
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tone2_loop:
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jsr play_4be
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jsr play_4e6
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dec COUNTDOWN
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bne tone2_loop
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rts
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play_4be: ; 4be = 1214
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; 1214
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; -6 jsr
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; -6 rts
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;============
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; 1202
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; Try X=239 Y=1 cycles=1202
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ldy #1 ; 2
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loop1: ldx #239 ; 2
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loop2: dex ; 2
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bne loop2 ; 2nt/3
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dey ; 2
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bne loop1 ; 2nt/3
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lda SPEAKER ; click speaker
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rts
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play_4e6: ; 1254
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; 1254
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; -6 jsr
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; -6 rts
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;============
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; 1232
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; Try X=245 Y=1 cycles=1232
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ldy #1 ; 2
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loopA: ldx #245 ; 2
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loopB: dex ; 2
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bne loopB ; 2nt/3
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dey ; 2
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bne loopA ; 2nt/3
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lda SPEAKER ; click speaker
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rts
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play_304: ; 772
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; 772
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; -6 jsr
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; -6 rts
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;============
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; 760
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; Try X=1 Y=69 cycles=760
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ldy #69 ; 2
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loopC: ldx #1 ; 2
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loopD: dex ; 2
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bne loopD ; 2nt/3
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dey ; 2
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bne loopC ; 2nt/3
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lda SPEAKER ; click speaker
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rts
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play_369: ; 873
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; 873
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; -6 jsr
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; -6 rts
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;============
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; 861
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; Try X=16 Y=10 cycles=861
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ldy #10 ; 2
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loopE: ldx #16 ; 2
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loopF: dex ; 2
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bne loopF ; 2nt/3
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dey ; 2
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bne loopE ; 2nt/3
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lda SPEAKER ; click speaker
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rts
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play_32c: ; 812
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; 812
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; -6 jsr
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; -6 rts
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;============
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; 800
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; Try X=158 Y=1 cycles=797 R3
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lda COUNTDOWN ; nop3
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ldy #11 ; 2
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loopG: ldx #158 ; 2
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loopH: dex ; 2
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bne loopH ; 2nt/3
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dey ; 2
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bne loopG ; 2nt/3
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lda SPEAKER ; click speaker
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rts
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; From http://6502org.wikidot.com/software-delay
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; 25+A cycles (including JSR), 19 bytes (excluding JSR)
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;
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; The branches must not cross page boundaries!
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;
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; Cycles Accumulator Carry flag
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; 0 1 2 3 4 5 6 (hex) 0 1 2 3 4 5 6
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; jsr delay_a ; 6 6 6 6 6 6 6 00 01 02 03 04 05 06
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dly0: sbc #7
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delay_a:cmp #7 ; 2 2 2 2 2 2 2 00 01 02 03 04 05 06 0 0 0 0 0 0 0
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bcs dly0 ; 2 2 2 2 2 2 2 00 01 02 03 04 05 06 0 0 0 0 0 0 0
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lsr ; 2 2 2 2 2 2 2 00 00 01 01 02 02 03 0 1 0 1 0 1 0
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bcs dly1 ; 2 3 2 3 2 3 2 00 00 01 01 02 02 03 0 1 0 1 0 1 0
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dly1: beq dly2 ; 3 3 2 2 2 2 2 00 00 01 01 02 02 03 0 1 0 1 0 1 0
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lsr ; 2 2 2 2 2 00 00 01 01 01 1 1 0 0 1
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beq dly3 ; 3 3 2 2 2 00 00 01 01 01 1 1 0 0 1
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bcc dly3 ; 3 3 2 01 01 01 0 0 1
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dly2: bne dly3 ; 2 2 3 00 00 01 0 1 0
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dly3: rts ; 6 6 6 6 6 6 6 00 00 00 00 01 01 01 0 1 1 1 0 0 1
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;
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; Total cycles: 25 26 27 28 29 30 31
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