mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-25 20:30:31 +00:00
206 lines
3.3 KiB
ArmAsm
206 lines
3.3 KiB
ArmAsm
; Play the KSP theme, but compressed a bit (only write registers that change)
|
|
; Still 3-channel
|
|
; The KSP theme is fairly small, will need to compress more
|
|
|
|
.include "zp.inc"
|
|
|
|
;=============================
|
|
; Print message
|
|
;=============================
|
|
jsr HOME
|
|
jsr TEXT
|
|
|
|
lda #0
|
|
sta DRAW_PAGE
|
|
sta CH
|
|
sta CV
|
|
lda #<mocking_message
|
|
sta OUTL
|
|
lda #>mocking_message
|
|
sta OUTH
|
|
jsr move_and_print
|
|
|
|
jsr mockingboard_detect_slot4
|
|
cpx #$1
|
|
beq mockingboard_found
|
|
|
|
lda #<not_message
|
|
sta OUTL
|
|
lda #>not_message
|
|
sta OUTH
|
|
inc CV
|
|
jsr move_and_print
|
|
|
|
jmp forever_loop
|
|
|
|
mockingboard_found:
|
|
lda #<found_message
|
|
sta OUTL
|
|
lda #>found_message
|
|
sta OUTH
|
|
inc CV
|
|
jsr move_and_print
|
|
|
|
;============================
|
|
; Init the Mockingboard
|
|
;============================
|
|
|
|
jsr mockingboard_init
|
|
jsr reset_ay_left
|
|
jsr reset_ay_right
|
|
jsr clear_ay_left
|
|
jsr clear_ay_right
|
|
|
|
|
|
;===========================
|
|
; load pointer to the music
|
|
;===========================
|
|
|
|
lda #<ksp_theme
|
|
sta INL
|
|
lda #>ksp_theme
|
|
sta INH
|
|
|
|
new_frame:
|
|
ldy #0
|
|
lda (INL),Y ; read in frame delay
|
|
cmp #$ff ; see if end
|
|
beq done_play ; if so, done
|
|
|
|
tax
|
|
old_frame:
|
|
dex ; decrement the frame diff
|
|
beq bottom_regs ; if not there yet, delay
|
|
jsr delay_50Hz
|
|
jmp old_frame
|
|
|
|
bottom_regs:
|
|
iny
|
|
lda (INL),Y ; load low reg bitmask
|
|
sta MASK
|
|
ldx #$ff ; init to -1
|
|
bottom_regs_loop:
|
|
inx ; increment X
|
|
cpx #$8 ; if we reach 8, done
|
|
beq top_regs ; move on to top
|
|
|
|
ror MASK
|
|
bcc bottom_regs_loop ; if bit not set in mask, skip reg
|
|
|
|
stx XX ; save X
|
|
|
|
iny ; get next output value
|
|
lda (INL),Y ; read in value
|
|
|
|
sty YY ; save Y
|
|
|
|
tax ; value in X
|
|
ldy XX ; register# in Y
|
|
|
|
; reg in Y, value in X
|
|
jsr write_ay_left ; assume 3 channel (not six)
|
|
jsr write_ay_right ; so write same to both left/write
|
|
|
|
ldx XX ; restore X
|
|
ldy YY ; restore Y
|
|
|
|
jmp bottom_regs_loop ; loop
|
|
|
|
top_regs:
|
|
iny ; point to next value
|
|
lda (INL),Y ; load top reg bitmask
|
|
sta MASK
|
|
ldx #$7 ; load X as 7 (we increment first)
|
|
top_regs_loop:
|
|
inx ; increment
|
|
cpx #$16
|
|
beq done_with_masks ; exit if done
|
|
|
|
ror MASK
|
|
bcc top_regs_loop ; loop if not set
|
|
|
|
stx XX ; save X value
|
|
|
|
iny ; point to value
|
|
lda (INL),Y ; read in output value
|
|
|
|
sty YY ; save Y value
|
|
|
|
tax ; value in X
|
|
ldy XX ; register in Y
|
|
|
|
; reg in Y, value in X
|
|
jsr write_ay_left ; assume 3 channel (not six)
|
|
jsr write_ay_right ; so write same to both left/write
|
|
|
|
ldx XX
|
|
ldy YY
|
|
|
|
jmp top_regs_loop
|
|
|
|
done_with_masks:
|
|
iny
|
|
clc
|
|
tya
|
|
adc INL
|
|
sta INL
|
|
lda #0
|
|
adc INH
|
|
sta INH
|
|
|
|
jsr delay_50Hz
|
|
|
|
jmp new_frame
|
|
|
|
done_play:
|
|
|
|
jsr clear_ay_left
|
|
jsr clear_ay_right
|
|
|
|
lda #0
|
|
sta CH
|
|
lda #3
|
|
sta CV
|
|
lda #<done_message
|
|
sta OUTL
|
|
lda #>done_message
|
|
sta OUTH
|
|
jsr move_and_print
|
|
|
|
|
|
forever_loop:
|
|
jmp forever_loop
|
|
|
|
|
|
|
|
delay_50Hz:
|
|
|
|
lda #86
|
|
jsr WAIT ; delay 1/2(26+27A+5A^2) us
|
|
; 50Hz = 20ms = 20000us
|
|
; 40000 = 26+27A+5A^2
|
|
; 5a^2+27a-39974 = 0
|
|
; A = 86.75
|
|
rts
|
|
|
|
|
|
;=========
|
|
;routines
|
|
;=========
|
|
.include "../asm_routines/gr_offsets.s"
|
|
.include "../asm_routines/text_print.s"
|
|
.include "../asm_routines/mockingboard.s"
|
|
|
|
;=======
|
|
; music
|
|
;=======
|
|
.include "ksp_theme_compressed.inc"
|
|
|
|
;=========
|
|
; strings
|
|
;=========
|
|
mocking_message: .asciiz "ASSUMING MOCKINGBOARD IN SLOT #4"
|
|
not_message: .byte "NOT "
|
|
found_message: .asciiz "FOUND"
|
|
done_message: .asciiz "DONE PLAYING"
|