poor man's _toascii routine, contributed by Fatih Aygun

git-svn-id: svn://svn.cc65.org/cc65/trunk@4477 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/atari/Makefile

@@ -108,6 +108,7 @@ OBJS = 	_scrsize.o      \
 	sysrmdir.o      \
 	systime.o       \
 	sysuname.o      \
+	toascii.o       \
 	tgi_mode_table.o\
 	tvtype.o        \
 	ucase_fn.o      \

libsrc/atari/toascii.s

@@ -0,0 +1,19 @@
+;
+; unsigned char __fastcall__ toascii (unsigned char c);
+; /* Convert a target specific character to ascii */
+;
+
+.export _toascii
+
+.proc _toascii
+
+; Clear the inverse video bit
+	and	#$7F
+
+; X must be zero on return
+	ldx     #0
+
+; Done!
+	rts
+
+.endproc