started cleanup of aliases, build system fixes

c64/kernal/iec_tx_byte.s

@@ -21,8 +21,8 @@ iec_tx_byte:
 	;; All done - give device time to tell if they are busy by pulling DATA
 	;; They should do it within 1ms
 	ldx #$FF
-*	lda CI2PRA
-	;; BPL here is checking that bit 7 of $DD00 clears,
+*	lda CIA2_PRA
+	;; BPL here is checking that bit 7 clears,
 	;; i.e, that the DATA line is pulled by drive
 	bpl +
 	dex