dos33fsprogs/dya/volume_bars.s

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;==============================
;==============================
; Draw volume bars
;==============================
;==============================
volume_bars:
; hline Y,V2 at A
; top line
lda #COLOR_BOTH_GREY ; 2
sta COLOR ; remove for crazy effect ; 3
ldy #12 ; 2
lda #26 ; 2
sta V2 ; 3
lda #6 ; 2
jsr hlin_double ; 6
; 63+14*16=287
;=====================
; 307
; middle
lda #8 ; 2
middle_loop:
pha ; 3
cmp #8 ; 2
beq middle_black_jmp ; 2nt/3
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cmp #26 ; 2
beq middle_black_jmp ; 2nt/3
bne after_middle_black_jmp
middle_black_jmp:
jmp middle_black
after_middle_black_jmp:
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cmp #10 ; 2
bne not_top ; 2nt/3
ldx #$3B ; pink/purple ; 2
stx A_COLOR ; 3
stx A2_COLOR
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ldx #$7E ; light-blue/aqua ; 2
stx B_COLOR ; 3
stx B2_COLOR
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ldx #$CD ; light-green/yellow ; 2
stx C_COLOR ; 3
stx C2_COLOR
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jmp calc_volume ; 3
not_top:
ldx #COLOR_BOTH_RED ; 2
stx A_COLOR ; 3
stx A2_COLOR
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ldx #COLOR_BOTH_DARKBLUE ; 2
stx B_COLOR ; 3
stx B2_COLOR
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ldx #COLOR_BOTH_DARKGREEN ; 2
stx C_COLOR ; 3
stx C2_COLOR
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calc_volume:
; 10 14/15 24-x = 14 PLUS=none, zero=bottom, neg=all
; 12 12/13 12
; 14 10/11 10
; 16 8/9 8
; 18 6/7 6
; 20 4/5 4
; 22 2/3 2
; 24 0/1 0
; FIXME: there must be a way to make this faster
mod_a:
pha ; 3
sec ; 2
eor #$ff ; negate ; 2
adc #24 ; 24-A ; 2
sec ; 2
sbc A_VOLUME ; 2
bmi mod_a2 ; 2nt/3
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beq mod_a_bottom ; 2nt/3
mod_a_zero:
lda #0 ; 2
beq done_a ; 2nt/3
mod_a_bottom:
lda A_COLOR ; 2
and #$f0 ; 2
done_a:
sta A_COLOR ; 2
mod_a2:
pla
pha
sec ; 2
eor #$ff ; negate ; 2
adc #24 ; 24-A ; 2
sec ; 2
sbc A_VOLUME2 ; 2
bmi mod_b ; 2nt/3
beq mod_a2_bottom ; 2nt/3
mod_a2_zero:
lda #0 ; 2
beq done_a2 ; 2nt/3
mod_a2_bottom:
lda A2_COLOR ; 2
and #$f0 ; 2
done_a2:
sta A2_COLOR ; 2
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mod_b:
pla ; 4
pha ; 3
sec ; 2
eor #$ff ; negate ; 2
adc #24 ; 24-A ; 2
sec ; 2
sbc B_VOLUME ; 2
bmi mod_b2 ; 2nt/3
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beq mod_b_bottom ; 2nt/3
mod_b_zero:
lda #0 ; 2
beq done_b ; 2nt/3
mod_b_bottom:
lda B_COLOR ; 3
and #$f0 ; 2
done_b:
sta B_COLOR ; 3
mod_b2:
pla ; 4
pha ; 3
sec ; 2
eor #$ff ; negate ; 2
adc #24 ; 24-A ; 2
sec ; 2
sbc B_VOLUME2 ; 2
bmi mod_c ; 2nt/3
beq mod_b2_bottom ; 2nt/3
mod_b2_zero:
lda #0 ; 2
beq done_b2 ; 2nt/3
mod_b2_bottom:
lda B2_COLOR ; 3
and #$f0 ; 2
done_b2:
sta B2_COLOR ; 3
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mod_c:
pla ; 4
pha ; 3
sec ; 2
eor #$ff ; negate ; 2
adc #24 ; 24-A ; 2
sec ; 2
sbc C_VOLUME ; 2
bmi mod_c2 ; 2nt/3
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beq mod_c_bottom ; 2nt/3
mod_c_zero:
lda #0 ; 2
beq done_c ; 2nt/3
mod_c_bottom:
lda C_COLOR ; 3
and #$f0 ; 2
done_c:
sta C_COLOR ; 3
mod_c2:
pla ; 4
pha ; 3
sec ; 2
eor #$ff ; negate ; 2
adc #24 ; 24-A ; 2
sec ; 2
sbc C_VOLUME2 ; 2
bmi mod_d ; 2nt/3
beq mod_c2_bottom ; 2nt/3
mod_c2_zero:
lda #0 ; 2
beq done_c2 ; 2nt/3
mod_c2_bottom:
lda C2_COLOR ; 3
and #$f0 ; 2
done_c2:
sta C2_COLOR ; 3
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mod_d:
pla ; 4
jmp middle_color_done ; 3
middle_black:
ldx #COLOR_BOTH_BLACK ; 2
stx A_COLOR ; 3
stx B_COLOR ; 3
stx C_COLOR ; 3
stx A2_COLOR ; 3
stx B2_COLOR ; 3
stx C2_COLOR ; 3
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middle_color_done:
; left border
ldy #COLOR_BOTH_GREY ; 2
sty COLOR ; 3
ldy #12 ; 2
sty V2 ; 3
ldy #12 ; 2
jsr hlin_double ; 6
; 63+1*16=79
ldy #0
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; border space
lda #COLOR_BOTH_BLACK ; 2
sta (GBASL),Y
iny
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; A volume
lda A_COLOR ; 3
sta (GBASL),Y ; 3
iny
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; A space
lda #0
sta (GBASL),Y
iny
; A2 volume
lda A2_COLOR ; 3
sta (GBASL),Y ; 3
iny
; AB space
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lda #COLOR_BOTH_BLACK ; 2
sta (GBASL),Y
iny
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; 10+1*16=27
; B volume
lda B_COLOR ; 3
sta (GBASL),Y
iny
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; B space
lda #0 ; 3
sta (GBASL),Y ; 3
iny
; B2 volume
lda B2_COLOR ; 3
sta (GBASL),Y
iny
; 10+3*16=58
; BC space
lda #COLOR_BOTH_BLACK ; 2
sta (GBASL),Y ; 3
iny
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; 10+1*16=27
; C volume
lda C_COLOR ; 3
sta (GBASL),Y ; 3
iny
; C space
lda #0 ; 3
sta (GBASL),Y
iny
; C2 volume
lda C2_COLOR ; 3
sta (GBASL),Y
iny
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; C space
lda #COLOR_BOTH_BLACK ; 2
sta (GBASL),Y
iny
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; 10+1*16=27
; Right border
lda #COLOR_BOTH_GREY ; 2
sta (GBASL),Y ; 3
iny
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; 10+1*16=27
pla ; 4
clc ; 2
adc #2 ; 2
cmp #28 ; 2
beq bottom_line ; 2nt/3
jmp middle_loop ; 3
bottom_line:
; bottom line
lda #COLOR_BOTH_GREY ; 2
sta COLOR ; 3
ldy #12 ; 2
lda #26 ; 2
sta V2 ; 3
lda #28 ; 2
jsr hlin_double ; 6
; 63+14*16=287
rts ; 6
; 309+ 684*10 + 313 = roughly worst case 7462