From ecc138f2bc6a43146b22d0fb02478ae3188472b6 Mon Sep 17 00:00:00 2001
From: hugova <hugova@kth.se>
Date: Thu, 6 Mar 2025 00:59:29 +0100
Subject: [PATCH] Redused number of instructions but to small a diffrence to
 messure with current test

---
 wip-hugo/routines/line/line_down.s    | 29 +++++++++++----------------
 wip-hugo/routines/memory/pixel_draw.s |  2 +-
 2 files changed, 13 insertions(+), 18 deletions(-)

diff --git a/wip-hugo/routines/line/line_down.s b/wip-hugo/routines/line/line_down.s
index edccd11..3fc4aaa 100644
--- a/wip-hugo/routines/line/line_down.s
+++ b/wip-hugo/routines/line/line_down.s
@@ -48,18 +48,13 @@
     Add_16 >D, <D, #$ff, #$01, !
     Sub_16 >D, <D, dx, #$00
 
-start_paint:
+
     LDY #$00
     jsr pixel_draw ;;only used first pixel. after this relative position is abused
-    ;byte_to_paint = $FE ;Byte with one 1 that corasponds to a pixel.
-    ;btp_mem_pos =$494A; byte to paint memory position ;Position of byte on screen
-    jmp increment_x_pos_end
-
 for_x:
     ;; Lets increment btp_mem_pos with +8
     ;; Read more in pixel_draw to understand this!
-increment_x_pos:
-    INC X_pos;; legacy
+increment_pixel_x:
     CLC
     LDA byte_to_paint
     ROR byte_to_paint
@@ -67,14 +62,15 @@ increment_x_pos:
     ORA (>btp_mem_pos, X)
     STA (>btp_mem_pos, X)
     BCS move_8px_left
-    jmp increment_x_pos_end
+    jmp increment_pixel_x_end
 move_8px_left:
-;; add +8 to btp_mem_pos. Find more of why in pixel_draw
-Add_16 >btp_mem_pos, <btp_mem_pos, #$08, #$00
-;; reset byte_to_paint
-LDA #%10000000
-STA byte_to_paint
-increment_x_pos_end:
+    ;; add +8 to btp_mem_pos. Find more of why in pixel_draw
+    Add_16 >btp_mem_pos, <btp_mem_pos, #$08, #$00
+    ;; reset byte_to_paint
+    LDA #%10000000
+    STA byte_to_paint
+increment_pixel_x_end:
+    INC X_pos;; legacy
     LDX X_pos
     CPX X_end
     BEQ end
@@ -82,9 +78,8 @@ increment_x_pos_end:
     ;;else case 1.
     Lag_16 >D, <D, #$00, #$02, case_2
 case_1:; C =1 so we can use !
-    Sub_16 >D, <D, >V, <V ; D = D - V
+    Sub_16 >D, <D, >V, <V, ! ; D = D - V
     increment_y_pos:
-    INC Y_pos
     Add_16 >btp_mem_pos, <btp_mem_pos, #$01, #$00
     INY
     CPY #$08 ;
@@ -96,7 +91,7 @@ move_8px_down:
     Add_16 >btp_mem_pos, <btp_mem_pos,#$38 , #$01
     jmp for_x
 case_2: ;; C =0 because LAG_16 so we can use !
-    Add_16 >D, <D, >dy_2, <dy_2 ;D = D + 2*dy
+    Add_16 >D, <D, >dy_2, <dy_2, ! ;D = D + 2*dy
     JMP for_x
 end:
     RTS
diff --git a/wip-hugo/routines/memory/pixel_draw.s b/wip-hugo/routines/memory/pixel_draw.s
index 21261bc..e6e81df 100755
--- a/wip-hugo/routines/memory/pixel_draw.s
+++ b/wip-hugo/routines/memory/pixel_draw.s
@@ -15,7 +15,7 @@
 	;;Store pixel in byte_to_paint
 	LDA #%10000000
 	INX
-@shift_btp:
+@shift_btp: ;; check out SMB instruction here! //Hugo
 	DEX
 	BEQ end__;X=0 end this
 	CLC