Design change: Do keyboard polling internally without calling the kernal

in the system bank. For one this performs better (several %), second it
allows to handle the function keys in conformance with other platforms.
Without the custom keyboard routine, we would have to apply some more
magic to the function keys to make them work as with other cc65 targets.


git-svn-id: svn://svn.cc65.org/cc65/trunk@2811 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/cbm610/kudtim.s

@@ -0,0 +1,23 @@
+;
+; Ullrich von Bassewitz, 2003-12-21
+;
+; udtim routine for the 610. We will not check for the stop key here, since
+; C programs will not use it.
+;                                  
+
+        .export         UDTIM
+        .import         time: zp
+
+.proc	UDTIM
+
+	inc	time
+	bne	L9
+	inc	time+1
+	bne	L9
+	inc	time+2
+	bne	L9
+	inc	time+3
+L9:	rts
+
+.endproc
+