MEGA65 native screen fixes

src/kernal/screen_m65/mega65_screen_helpers.s

@@ -2,52 +2,21 @@
 // #LAYOUT# *   *        #IGNORE
 
 
-m65_helper_scrlpnt_color:
+m65_screen_clear_colorattr:
 
-	// Set .Z to the current column
-
-	ldz M65__TXTCOL
-
-	// Setting M65_LPNT_SCR to point to colour memory (starts from $FF80000)
-
-	lda #$0F
-	sta M65_LPNT_SCR+3
-	lda #$F8
-	sta M65_LPNT_SCR+2
-
-	lda M65_COLVIEW+1
-	sta M65_LPNT_SCR+1
-	lda M65_COLVIEW+0
-	sta M65_LPNT_SCR+0
-
-	// Add screen row to the address
-
-	clc
-	lda M65_TXTROW_OFF+0
-	adc M65_LPNT_SCR+0
-	sta M65_LPNT_SCR+0	
-	lda M65_TXTROW_OFF+1
-	adc M65_LPNT_SCR+1
-	sta M65_LPNT_SCR+1	
+	lda COLOR
+	and #$0F
+	sta COLOR
 
 	rts
 
 
-m65_helper_scrlpnt_to_screen:
+m65_screen_upd_txtrow_off:
 
-	// Change M65_LPNT_SCR to point to screen memory (when it points to color memory)
-
-	lda M65_SCRSEG+1
-	sta M65_LPNT_SCR+3
-	lda M65_SCRSEG+0
-	sta M65_LPNT_SCR+2
-
-	clc
-	lda M65_SCRBASE+0
-	adc M65_LPNT_SCR+0
-	sta M65_LPNT_SCR+0
-	lda M65_SCRBASE+1
-	adc M65_LPNT_SCR+1
-	sta M65_LPNT_SCR+1
+	ldy M65__TXTROW
+	lda m65_scrtab_rowoffset_lo,y
+	sta M65_TXTROW_OFF+0
+	lda m65_scrtab_rowoffset_hi,y
+	sta M65_TXTROW_OFF+1
 
 	rts