From 30925a35c8093afe21054fbcab33c999f22ce6d8 Mon Sep 17 00:00:00 2001
From: FeralChild64 <you@example.com>
Date: Fri, 14 Jun 2019 21:43:56 +0200
Subject: [PATCH] implemented SCREEN routine

---
 c64/kernal/ffed.s            |  2 +-
 c64/kernal/get_screen_size.s |  2 --
 c64/kernal/screen.s          | 11 +++++++++++
 3 files changed, 12 insertions(+), 3 deletions(-)
 delete mode 100644 c64/kernal/get_screen_size.s
 create mode 100644 c64/kernal/screen.s

diff --git a/c64/kernal/ffed.s b/c64/kernal/ffed.s
index a9e258cf..55d44e37 100644
--- a/c64/kernal/ffed.s
+++ b/c64/kernal/ffed.s
@@ -1,4 +1,4 @@
 ; $FFED - Return screen size (X=columns, Y=rows)
 ; (http://codebase64.org/doku.php?id=base:kernalreference)
 
-	jmp get_screen_size
+	jmp screen
diff --git a/c64/kernal/get_screen_size.s b/c64/kernal/get_screen_size.s
deleted file mode 100644
index ff7be9a0..00000000
--- a/c64/kernal/get_screen_size.s
+++ /dev/null
@@ -1,2 +0,0 @@
-get_screen_size:
-	rts
diff --git a/c64/kernal/screen.s b/c64/kernal/screen.s
new file mode 100644
index 00000000..19fa509d
--- /dev/null
+++ b/c64/kernal/screen.s
@@ -0,0 +1,11 @@
+; Function defined on p295 of C64 Programmers Reference Guide
+
+screen:
+
+	;; There are only 2 sane ways to implement this routine,
+	;; I hope this one is different than what Commodore picked :)
+
+	ldy #25 ; 25 columns
+	ldx #40 ; 40 rows
+
+	rts