fix for PLOT routine

c64/kernal/jumptable/4000.internal_jumptable.s

@@ -1,9 +1,11 @@
 #if (ROM_LAYOUT_M65 && SEGMENT_KERNAL_1)
 
+
 // XXX this is for testing only
 
 	sed
 	sed
 	rts
 
+
 #endif // ROM layout

c64/kernal/screen/chrout_screen.s

@@ -120,8 +120,7 @@ chrout_screen_literal:
 
 chrout_screen_calc_lptr_done:
 
-	jsr screen_calculate_PNT_USER
+	jsr screen_calculate_pointers
-	jsr screen_calculate_PNTR_LNMX
 
 	// FALLTROUGH
 

c64/kernal/screen/e50a.plot.s

@@ -24,7 +24,7 @@ plot_set:
 	sty PNTR
 	stx TBLX
 
-	jsr screen_calculate_PNT_USER
+	jsr screen_calculate_pointers
 
 	// FALLTROUGH to save one byte on RTS
 

c64/kernal/screen/e56c.screen_calculate_pointers.s

@@ -0,0 +1,19 @@
+#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
+
+//
+// Set pointer (PNT) to current screen line , described in:
+//
+// - [CM64] Computes Mapping the Commodore 64 - page 216
+// - http://sta.c64.org/cbm64scrfunc.html
+//
+
+// XXX find out what the original ROM really recalculate
+
+
+screen_calculate_pointers:
+
+	jsr screen_calculate_PNT_USER
+	jmp screen_calculate_PNTR_LNMX
+
+
+#endif // ROM layout

c64/kernal/screen/screen_calculate_pnt_user.s

@@ -1,10 +1,7 @@
 #if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
 
 //
-// Set pointer (PNT) to current screen line , described in:
+// Set pointers PNT and USER to current screen line
-//
-// - [CM64] Computes Mapping the Commodore 64 - page 216
-// - http://sta.c64.org/cbm64scrfunc.html
 //