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make pixel drawing faster using lookup table

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hugova 2025-05-11 20:00:48 +02:00
parent e89d566fbb
commit 017a337180
3 changed files with 5 additions and 11 deletions
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2
wip-hugo/routines/memory/mem.inc
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@ -1,6 +1,6 @@
;;; -*- Mode: asm; indent-tabs-mode: t; tab-width: 8 -*- ;;; -*- Mode: asm; indent-tabs-mode: t; tab-width: 8 -*-
;;Public args ;; public args
A_start = $D0 ; 16-bit value (uses D1) A_start = $D0 ; 16-bit value (uses D1)
B_start = $D2 ; 16-bit value (uses D3) B_start = $D2 ; 16-bit value (uses D3)
B_end = $D4 ; 16-bit value (uses D5) B_end = $D4 ; 16-bit value (uses D5)

13
wip-hugo/routines/pixel/pixel_draw.s
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@ -11,16 +11,9 @@
AND #%00000111 AND #%00000111
TAX TAX
;;Store pixel in byte_to_paint # this is the same as: A = 2^X
LDA #%10000000 LDA binary_factor, X
INX
@shift_btp: ;; check out SMB instruction here! //Hugo
DEX
BEQ end__;X=0 end this
CLC
ROR A
jmp @shift_btp
end__:
STA byte_to_paint STA byte_to_paint
;;FIND THE POSITION IN MEMORY TO WRITE PIXEL ;;FIND THE POSITION IN MEMORY TO WRITE PIXEL

1
wip-hugo/source.s
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@ -18,3 +18,4 @@ JMP exit
.include "routines/pixel/pixel_draw.s" .include "routines/pixel/pixel_draw.s"
.include "routines/memory/memset.s" .include "routines/memory/memset.s"
.include "routines/memory/memcpy.s" .include "routines/memory/memcpy.s"
.include "END.s"