robustness improvements in IEC support

2019-06-22 14:35:28 +02:00
1 parent b21ce3116d
commit 22e1e201af
@@ -3,6 +3,7 @@ tksa:

 	;; This routine is documented in 'C64 Programmer's Reference Guide', page 302 and
 	;; https://www.pagetable.com/?p=1031, , https://github.com/mist64/cbmbus_doc
+	and #$1F ; make sure bits encoding the command are cleared out
 	ora #$F0
 	jmp iec_tx_command