initmainargs routine by Stefan Haubenthal.

git-svn-id: svn://svn.cc65.org/cc65/trunk@3949 b7a2c559-68d2-44c3-8de9-860c34a00d81
2009-02-22 17:51:12 +00:00
parent bf810bf001
commit a17d27247e
2 changed files with 115 additions and 6 deletions
--- a/libsrc/pet/crt0.s
+++ b/libsrc/pet/crt0.s
@@ -42,11 +42,19 @@ L1:	lda	sp,x

 	jsr	CLRCH

-; Switch to second charset
+; Switch to second charset. The routine that is called by BSOUT to switch the
+; character set will use FNLEN as temporary storage - YUCK! Since the
+; initmainargs routine, which parses the command line for arguments needs this
+; information, we need to save and restore it here.
+; Thanks to Stefan Haubenthal for this information!

+        lda     FNLEN
+        pha                     ; Save FNLEN
 	lda	#14
 ;	sta	$E84C		; See PET FAQ
 	jsr	BSOUT
+        pla
+        sta     FNLEN           ; Restore FNLEN

 ; Clear the BSS data