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https://github.com/deater/dos33fsprogs.git
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130 lines
1.9 KiB
ArmAsm
130 lines
1.9 KiB
ArmAsm
; Play the KSP theme, but uncompressed (so pretty huge and slow to load)
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.include "zp.inc"
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;=============================
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; Print message
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;=============================
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jsr HOME
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jsr TEXT
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lda #0
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sta DRAW_PAGE
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sta CH
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sta CV
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lda #<mocking_message
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sta OUTL
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lda #>mocking_message
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sta OUTH
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jsr move_and_print
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;============================
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; Init the Mockingboard
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;============================
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jsr mockingboard_init
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jsr reset_ay_left
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jsr reset_ay_right
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jsr clear_ay_left
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jsr clear_ay_right
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;===========================
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; load pointer to the music
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;===========================
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lda #<ksptheme
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sta INL
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lda #>ksptheme
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sta INH
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ldx #0
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frame_loop:
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ldy #0
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play_loop:
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lda (INL),Y
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tax
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jsr write_ay_left ; assume 3 channel (not six)
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jsr write_ay_right ; so write same to both left/write
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iny
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cpy #13
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bne play_loop
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; special case, if reg 13 = ff don't write it
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lda (INL),Y
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cmp #$ff
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beq was_ff
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jsr write_ay_left ; assume 3 channel (not six)
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jsr write_ay_right ; so write same to both left/write
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was_ff:
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; see if at end
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iny
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iny
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lda (INL),Y
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cmp #$ff
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beq done_play
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; increment INL:INH by 13
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clc
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lda INL
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adc #14
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sta INL
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lda INH
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adc #0
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sta INH
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delay_a_bit:
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lda #86
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jsr WAIT ; delay 1/2(26+27A+5A^2) us
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; 50Hz = 20ms = 20000us
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; 40000 = 26+27A+5A^2
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; 5a^2+27a-39974 = 0
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; A = 86.75
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jmp frame_loop
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done_play:
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jsr clear_ay_left
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jsr clear_ay_right
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lda #0
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sta CH
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lda #2
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sta CV
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lda #<done_message
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sta OUTL
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lda #>done_message
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sta OUTH
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jsr move_and_print
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forever_loop:
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jmp forever_loop
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;=========
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;routines
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;=========
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.include "../../asm_routines/gr_offsets.s"
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.include "../../asm_routines/text_print.s"
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.include "../../asm_routines/mockingboard.s"
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;=======
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; music
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;=======
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.include "ksptheme_uncompressed.inc"
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;=========
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; strings
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;=========
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mocking_message: .asciiz "ASSUMING MOCKINGBOARD IN SLOT #4"
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done_message: .asciiz "DONE PLAYING"
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