mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-11-20 03:35:24 +00:00
227 lines
4.0 KiB
ArmAsm
227 lines
4.0 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 ; 2
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sta COLOR ; remove for crazy effect ; 3
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ldy #12 ; 2
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lda #26 ; 2
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sta V2 ; 3
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lda #6 ; 2
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jsr hlin_double ; 6
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; 63+14*16=287
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;=====================
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; 307
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; middle
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lda #8 ; 2
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middle_loop:
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pha ; 3
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cmp #8 ; 2
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beq middle_black ; 2nt/3
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cmp #26 ; 2
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beq middle_black ; 2nt/3
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cmp #10 ; 2
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bne not_top ; 2nt/3
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ldx #$3B ; pink/purple ; 2
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stx A_COLOR ; 3
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ldx #$7E ; light-blue/aqua ; 2
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stx B_COLOR ; 3
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ldx #$CD ; light-green/yellow ; 2
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stx C_COLOR ; 3
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jmp calc_volume ; 3
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not_top:
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ldx #COLOR_BOTH_RED ; 2
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stx A_COLOR ; 3
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ldx #COLOR_BOTH_DARKBLUE ; 2
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stx B_COLOR ; 3
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ldx #COLOR_BOTH_DARKGREEN ; 2
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stx C_COLOR ; 3
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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 ; 3
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sec ; 2
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eor #$ff ; negate ; 2
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adc #24 ; 24-A ; 2
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sec ; 2
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sbc A_VOLUME ; 2
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bmi mod_b ; 2nt/3
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beq mod_a_bottom ; 2nt/3
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mod_a_zero:
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lda #0 ; 2
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beq done_a ; 2nt/3
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mod_a_bottom:
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lda A_COLOR ; 2
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and #$f0 ; 2
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done_a:
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sta A_COLOR ; 2
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mod_b:
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pla ; 4
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pha ; 3
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sec ; 2
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eor #$ff ; negate ; 2
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adc #24 ; 24-A ; 2
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sec ; 2
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sbc B_VOLUME ; 2
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bmi mod_c ; 2nt/3
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beq mod_b_bottom ; 2nt/3
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mod_b_zero:
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lda #0 ; 2
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beq done_b ; 2nt/3
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mod_b_bottom:
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lda B_COLOR ; 3
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and #$f0 ; 2
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done_b:
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sta B_COLOR ; 3
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mod_c:
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pla ; 4
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pha ; 3
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sec ; 2
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eor #$ff ; negate ; 2
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adc #24 ; 24-A ; 2
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sec ; 2
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sbc C_VOLUME ; 2
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bmi mod_d ; 2nt/3
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beq mod_c_bottom ; 2nt/3
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mod_c_zero:
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lda #0 ; 2
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beq done_c ; 2nt/3
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mod_c_bottom:
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lda C_COLOR ; 3
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and #$f0 ; 2
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done_c:
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sta C_COLOR ; 3
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mod_d:
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pla ; 4
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jmp middle_color_done ; 3
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middle_black:
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ldx #COLOR_BOTH_BLACK ; 2
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stx A_COLOR ; 3
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stx B_COLOR ; 3
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stx C_COLOR ; 3
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middle_color_done:
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; left border
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ldy #COLOR_BOTH_GREY ; 2
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sty COLOR ; 3
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ldy #12 ; 2
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sty V2 ; 3
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ldy #12 ; 2
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jsr hlin_double ; 6
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; 63+1*16=79
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; border space
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lda #COLOR_BOTH_BLACK ; 2
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sta COLOR ; 3
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ldx #1 ; 2
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jsr hlin_double_continue ; 10+1*16=27
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; A volume
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lda A_COLOR ; 3
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sta COLOR ; 3
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ldx #3 ; 2
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jsr hlin_double_continue ; 10+3*16=58
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; A space
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lda #COLOR_BOTH_BLACK ; 2
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sta COLOR ; 3
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ldx #1 ; 2
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jsr hlin_double_continue ; 6
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; 10+1*16=27
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; B volume
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lda B_COLOR ; 3
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sta COLOR ; 3
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ldx #3 ; 2
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jsr hlin_double_continue ; 6
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; 10+3*16=58
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; B space
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lda #COLOR_BOTH_BLACK ; 2
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sta COLOR ; 3
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ldx #1 ; 2
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jsr hlin_double_continue ; 6
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; 10+1*16=27
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; C volume
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lda C_COLOR ; 3
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sta COLOR ; 3
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ldx #3 ; 2
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jsr hlin_double_continue ; 6
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; 10+3*16=58
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; C space
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lda #COLOR_BOTH_BLACK ; 2
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sta COLOR ; 3
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ldx #1 ; 2
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jsr hlin_double_continue ; 6
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; 10+1*16=27
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; Right border
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lda #COLOR_BOTH_GREY ; 2
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sta COLOR ; 3
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ldx #1 ; 2
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jsr hlin_double_continue ; 6
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; 10+1*16=27
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pla ; 4
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clc ; 2
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adc #2 ; 2
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cmp #28 ; 2
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beq bottom_line ; 2nt/3
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jmp middle_loop ; 3
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bottom_line:
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; bottom line
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lda #COLOR_BOTH_GREY ; 2
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sta COLOR ; 3
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ldy #12 ; 2
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lda #26 ; 2
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sta V2 ; 3
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lda #28 ; 2
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jsr hlin_double ; 6
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; 63+14*16=287
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rts ; 6
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; 309+ 684*10 + 313 = roughly worst case 7462
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