From 3b07b8b8e3771ab297707facc043bbf78a542029 Mon Sep 17 00:00:00 2001
From: jede <jede@oric.org>
Date: Fri, 26 Jul 2019 23:04:54 +0200
Subject: [PATCH 031/170] Add cclear and cclearxy
---
libsrc/telestrat/cclear.s | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
create mode 100644 libsrc/telestrat/cclear.s
diff --git a/libsrc/telestrat/cclear.s b/libsrc/telestrat/cclear.s
new file mode 100644
index 00000000..bf875ec1
--- /dev/null
+++ b/libsrc/telestrat/cclear.s
@@ -0,0 +1,35 @@
+;
+; 2019-07-07, Jede (jede@oric.org)
+;
+; void cclearxy (unsigned char x, unsigned char y, unsigned char length);
+; void cclear (unsigned char length);
+;
+
+ .export _cclearxy, _cclear
+ .import update_adscr
+
+ .importzp tmp1
+ .import popax
+ .include "telestrat.inc"
+
+
+_cclearxy:
+ pha ; Save the length
+ jsr popax ; Get X and Y
+ sta SCRY ; Store Y
+ stx SCRX ; Store X
+ jsr update_adscr
+ pla ; Restore the length and run into _cclear
+
+_cclear:
+ tax ; Is the length zero?
+ beq @L9 ; Jump if done
+@L1:
+ stx tmp1
+ lda #' '
+ BRK_TELEMON XFWR
+ ldx tmp1
+ dex
+ bne @L1
+@L9:
+ rts
--
2.26.0