more sane directory name, updated binaries

src/kernal/iec/unlsn.s

@@ -0,0 +1,40 @@
+// #LAYOUT# STD *        #TAKE
+// #LAYOUT# *   KERNAL_0 #TAKE
+// #LAYOUT# *   *        #IGNORE
+
+//
+// Official Kernal routine, described in:
+//
+// - [RG64] C64 Programmers Reference Guide   - page 303
+// - [CM64] Computes Mapping the Commodore 64 - page 224
+// - https://www.pagetable.com/?p=1031, , https://github.com/mist64/cbmbus_doc
+// - http://www.zimmers.net/anonftp/pub/cbm/programming/serial-bus.pdf
+//
+// CPU registers that has to be preserved (see [RG64]): .X, .Y
+//
+
+
+UNLSN:
+
+#if CONFIG_IEC
+
+	// According to serial-bus.pdf (page 15) this routine flushes the IEC out buffer
+	jsr iec_tx_flush
+
+#if CONFIG_IEC_JIFFYDOS || CONFIG_IEC_DOLPHINDOS
+
+	lda #$FF                           // do not use JiffyDOS / DolphinDOS anymore, trigger JiffyDOS detection
+	sta IECPROTO
+
+#endif
+
+	// Buffer empty, send the command
+	lda #$3F
+
+	jmp common_open_close_unlsn_second
+
+#else
+
+	jmp kernalerror_ILLEGAL_DEVICE_NUMBER
+
+#endif