more sane directory name, updated binaries

src/kernal/iostack/f20e.chkin.s

@@ -0,0 +1,72 @@
+// #LAYOUT# STD *        #TAKE
+// #LAYOUT# *   KERNAL_0 #TAKE
+// #LAYOUT# *   *        #IGNORE
+
+//
+// Official Kernal routines, described in:
+//
+// - [RG64] C64 Programmers Reference Guide   - page 275
+// - [CM64] Computes Mapping the Commodore 64 - page 229
+//
+// CPU registers that has to be preserved (see [RG64]): .Y, .A (see [CM64], page 213)
+//
+
+
+CHKIN:
+
+	// Store registers for preservation
+	pha
+	phy_trash_a
+
+	// Reset status
+	jsr kernalstatus_reset
+
+	// First retrieve the FAT/LAT/SAT table index (and check if file is open)
+
+	txa
+	jsr find_fls
+	bcs_16 chkinout_file_not_open
+
+	// Now we have table index in Y
+
+	lda FAT,Y
+
+	// Handle all the devices
+
+	beq chkin_set_device // 0 - keyboard
+
+	// Tape not supported here
+
+#if HAS_RS232
+
+	cmp #$02
+	beq_16 chkin_rs232
+
+#endif // HAS_RS232
+
+#if CONFIG_IEC
+
+	jsr iec_check_devnum_oc
+	bcc_16 chkin_iec
+
+#endif // CONFIG_IEC
+
+	cmp #$03 // screen - only legal one left
+	bne_16 chkinout_device_not_present
+
+chkin_set_device:
+	lda FAT,Y
+	sta DFLTN
+
+	// FALLTROUGH
+
+chkinout_end:
+	ply_trash_a
+	pla
+	clc // indicate success
+	rts
+
+chkin_file_not_input:
+	ply_trash_a
+	pla
+	jmp kernalerror_FILE_NOT_INPUT