Add extended testing of pixel_draw and fix a pixel_draw bugg (error of max 8px)

wip-hugo/END.s

@@ -1,5 +1,5 @@
 binary_factor:
-.byte   %00000001, %00000010, %00000100, %00001000, %00010000, %00100000, %01000000, %10000000
+.byte  %10000000, %01000000, %00100000, %00010000, %00001000, %00000100, %00000010, %00000001
 
 Bitmap = $4000
 ;;This is used by pixel_draw! look at it for more detail

wip-hugo/routines/pixel/pixel_test.s

@@ -1,9 +1,50 @@
 ;;; -*- Mode: asm; indent-tabs-mode: t; tab-width: 8 -*-
 .scope pixel_test
         .include "pixel.inc"
-        LDA #$40
+
+        LDA #$50
         STA X_pos
-        LDA #$40
+        LDA #$50
         STA Y_pos
+
+test_x:
+        NOP
+        NOP
+        NOP
+        NOP
+        DEY
+        BNE test_x
+        DEX
+        BNE test_x
+
         jsr pixel_draw
+        LDX #$20
+        LDY #$ff
+
+        DEC X_pos
+        BNE test_x
+end_test_x:
+
+        LDA #$50
+        STA X_pos
+        LDA #$50
+        STA Y_pos
+test_y:
+        NOP
+        NOP
+        NOP
+        NOP
+        DEY
+        BNE test_y
+        DEX
+        BNE test_y
+
+        jsr pixel_draw
+        LDX #$20
+        LDY #$ff
+
+        DEC Y_pos
+        BNE test_y
+end_test_y:
+
 .endscope