mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-11-20 03:35:24 +00:00
222 lines
2.5 KiB
ArmAsm
222 lines
2.5 KiB
ArmAsm
;==============================
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;==============================
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; Draw volume bars
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;==============================
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;==============================
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volume_bars:
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; hline Y,V2 at A
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; top line
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lda #COLOR_BOTH_GREY
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sta COLOR ; remove for crazy effect
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ldy #12
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lda #26
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sta V2
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lda #6
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jsr hlin_double
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; middle
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lda #8
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middle_loop:
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pha
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cmp #8
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beq middle_black
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cmp #26
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beq middle_black
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cmp #10
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bne not_top
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ldx #$3B ; pink/purple
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stx A_COLOR
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ldx #$7E ; light-blue/aqua
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stx B_COLOR
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ldx #$CD ; light-green/yellow
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stx C_COLOR
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jmp calc_volume
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not_top:
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ldx #COLOR_BOTH_RED
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stx A_COLOR
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ldx #COLOR_BOTH_DARKBLUE
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stx B_COLOR
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ldx #COLOR_BOTH_DARKGREEN
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stx C_COLOR
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calc_volume:
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; 10 14/15 24-x = 14 PLUS=none, zero=bottom, neg=all
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; 12 12/13 12
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; 14 10/11 10
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; 16 8/9 8
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; 18 6/7 6
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; 20 4/5 4
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; 22 2/3 2
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; 24 0/1 0
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; FIXME: there must be a way to make this faster
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mod_a:
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pha
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sec
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eor #$ff ; negate
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adc #24 ; 24-A
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sec
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sbc A_VOLUME
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bmi mod_b
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beq mod_a_bottom
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mod_a_zero:
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lda #0
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beq done_a
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mod_a_bottom:
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lda A_COLOR
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and #$f0
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done_a:
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sta A_COLOR
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mod_b:
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pla
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pha
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sec
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eor #$ff ; negate
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adc #24 ; 24-A
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sec
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sbc B_VOLUME
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bmi mod_c
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beq mod_b_bottom
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mod_b_zero:
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lda #0
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beq done_b
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mod_b_bottom:
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lda B_COLOR
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and #$f0
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done_b:
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sta B_COLOR
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mod_c:
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pla
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pha
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sec
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eor #$ff ; negate
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adc #24 ; 24-A
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sec
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sbc C_VOLUME
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bmi mod_d
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beq mod_c_bottom
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mod_c_zero:
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lda #0
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beq done_c
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mod_c_bottom:
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lda C_COLOR
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and #$f0
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done_c:
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sta C_COLOR
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mod_d:
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pla
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jmp middle_color_done
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middle_black:
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ldx #COLOR_BOTH_BLACK
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stx A_COLOR
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stx B_COLOR
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stx C_COLOR
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middle_color_done:
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; left border
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ldy #COLOR_BOTH_GREY
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sty COLOR
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ldy #12
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sty V2
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ldy #12
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jsr hlin_double
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; border space
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lda #COLOR_BOTH_BLACK
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sta COLOR
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ldx #1
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jsr hlin_double_continue
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; A volume
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lda A_COLOR
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sta COLOR
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ldx #3
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jsr hlin_double_continue
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; A space
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lda #COLOR_BOTH_BLACK
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sta COLOR
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ldx #1
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jsr hlin_double_continue
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; B volume
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lda B_COLOR
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sta COLOR
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ldx #3
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jsr hlin_double_continue
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; B space
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lda #COLOR_BOTH_BLACK
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sta COLOR
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ldx #1
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jsr hlin_double_continue
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; C volume
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lda C_COLOR
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sta COLOR
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ldx #3
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jsr hlin_double_continue
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; C space
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lda #COLOR_BOTH_BLACK
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sta COLOR
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ldx #1
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jsr hlin_double_continue
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; Right border
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lda #COLOR_BOTH_GREY
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sta COLOR
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ldx #1
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jsr hlin_double_continue
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pla
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clc
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adc #2
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cmp #28
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beq bottom_line
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jmp middle_loop
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bottom_line:
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; bottom line
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lda #COLOR_BOTH_GREY
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sta COLOR
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ldy #12
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lda #26
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sta V2
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lda #28
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jsr hlin_double
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rts
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