Code cleanup
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parent
0df0e666ad
commit
d5c15bd0c2
3 changed files with 1 additions and 16 deletions
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@ -51,7 +51,6 @@
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Sub_16 >D, <D, dx, #$00
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jsr pixel_draw ;;only used first pixel. after this relative position is abused
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;LDY #$00
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LDX X_pos
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for_x:
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;; Paints A to address i btp_mem_pos* + Y
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@ -45,7 +45,6 @@
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Sub_16 >D, <D, dy, #$00
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jsr pixel_draw ;;only used first pixel. after this relative position is abused
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LDY #$00
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LDX Y_pos
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for_y:
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LDA byte_to_paint
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@ -46,24 +46,12 @@ end__:
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;; Adding inside chunk offset
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LDA #%00000111 ; A = y (mod 8)
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AND Y_pos ;; offset to add
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;;ading offset, same as psudocode bellow
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;;Add_16 >btp_mem_pos, <btp_mem_pos, A, #$00
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;CLC ; Y = b_low
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;ADC >btp_mem_pos
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;STA >btp_mem_pos
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;LDA #$00
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;ADC <btp_mem_pos ; C =0
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;STA <btp_mem_pos
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TAY
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CLC
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LDA #$00
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STA $4B
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;;y =8 translates to 320 bytes.
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CLC
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LDA #%11111000 ; A = y - [y (mod 8)]
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AND Y_pos
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STA >C
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@ -91,7 +79,6 @@ end__:
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Add_16 >btp_mem_pos, <btp_mem_pos, #<Bitmap, #>Bitmap, !
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;;Let draw some stuff
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;LDY #$00
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LDA byte_to_paint ;; note that both bytes are used!
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ORA (>btp_mem_pos), Y
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STA (>btp_mem_pos), Y
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