small size optimization of screen code

c64/kernal/screen/chrout_screen.s

@@ -120,14 +120,11 @@ chrout_screen_literal:
 chrout_screen_calc_lptr_done:
 
 	jsr screen_calculate_PNT_USER
-	jsr screen_calculate_PNTR
-	jsr screen_calculate_LNMX
+	jsr screen_calculate_PNTR_LNMX
 
 	// FALLTROUGH
 
 chrout_screen_done:
 
-	// YYY should we update character under cursor here? or in cursor_show_if_enabled?
-
 	jsr cursor_show_if_enabled
 	jmp chrout_done_success

c64/kernal/screen/screen_calculate_pntr.s

@@ -1,30 +0,0 @@
-
-//
-// Sets PNTR in a proper range (0-39 or 40-79) depending on the
-//
-
-
-screen_calculate_PNTR:
-
-	ldy TBLX
-	lda LDTBL, y
-	php
-	jsr screen_get_clipped_PNTR
-	plp
-	bmi screen_calculate_PNTR_0_39
-
-	// FALLTROUGH
-
-screen_calculate_PNTR_40_79:
-
-	tya
-	clc
-	adc #40
-	tay
-
-	// FALLTROUGH
-
-screen_calculate_PNTR_0_39:
-
-	sty PNTR
-	rts

c64/kernal/screen/screen_calculate_pntr_lnmx.s

@@ -1,9 +1,36 @@
 
 //
+// Sets PNTR in a proper range (0-39 or 40-79)
 // Sets LNMX to 39 or 79
 //
 
 
+screen_calculate_PNTR_LNMX:
+
+	ldy TBLX
+	lda LDTBL, y
+	php
+	jsr screen_get_clipped_PNTR
+	plp
+	bmi screen_calculate_PNTR_0_39
+
+	// FALLTROUGH
+
+screen_calculate_PNTR_40_79:
+
+	tya
+	clc
+	adc #40
+	tay
+
+	// FALLTROUGH
+
+screen_calculate_PNTR_0_39:
+
+	sty PNTR
+
+	// FALLTROUGH
+
 screen_calculate_LNMX:
 
 	ldy TBLX