From 43d7e869e0eaa3debd08d990a40bb11e87cda25d Mon Sep 17 00:00:00 2001
From: FeralChild64 <you@example.com>
Date: Sun, 6 Oct 2019 15:02:26 +0200
Subject: [PATCH] fixes in PLOT routine - fixes some Duotris glitches, FB64 now
 allows browsing

---
 c64/kernal/e50a.plot.s | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/c64/kernal/e50a.plot.s b/c64/kernal/e50a.plot.s
index 58afa453..dbf08d43 100644
--- a/c64/kernal/e50a.plot.s
+++ b/c64/kernal/e50a.plot.s
@@ -17,15 +17,16 @@ PLOT:
 	// - 'Duotris' game calls $E50C during startup screen initialization
 
 plot_set:
-	sty TBLX
-	stx PNTR
+	sty PNTR
+	stx TBLX
 
-	// XXX handle cursor blink
-	// XXX should we update some more variables?
+	jsr calculate_screen_line_pointer
+
+	// XXX cursor blink might need to be handled too
 
 	// FALLTROUGH to save one byte on RTS
 
 plot_get:
-	ldy TBLX
-	ldx PNTR
+	ldy PNTR
+	ldx TBLX
 	rts