I/O stack refactoring completed

c64/kernal/iostack/f157.chrin.s

@@ -35,6 +35,8 @@ CHRIN:
 
 #endif // HAS_RS232
 
+chrin_getin: // jump entry for GETIN
+
 #if CONFIG_IEC
 
 	// Try IEC devices

c64/kernal/iostack/f1ca.chrout.s

@@ -0,0 +1,76 @@
+
+//
+// Official Kernal routine, described in:
+//
+// - [RG64] C64 Programmer's Reference Guide   - page 278/279
+// - [CM64] Compute's Mapping the Commodore 64 - page 228
+//
+// CPU registers that has to be preserved (see [RG64]): .Y
+// Additionally we have to preserve .X for out CHRIN and implementation
+//
+
+CHROUT:
+
+	sta SCHAR
+
+	// Save X and Y values
+	// (Confirmed by writing a test program that X and Y
+	// don't get modified, in agreement with C64 PRG's
+	// description of CHROUT)
+
+	phx_trash_a
+	phy_trash_a
+
+	php
+
+	// Determine the device number
+	lda DFLTO
+
+	cmp #$03 // screen
+	beq_far chrout_screen
+
+#if HAS_RS232
+	cmp #$02 
+	beq_far chrout_rs232
+#endif
+
+#if CONFIG_IEC
+	jsr iec_check_devnum_oc
+	bcc_far chrout_iec
+#if CONFIG_IEC
+
+	// FALLTROUGH
+
+chrout_done_fail:
+
+	plp
+
+	// Restore X and Y
+	ply_trash_a
+	plx_trash_a
+
+	sec // indicate failure
+	rts
+
+chrout_done_unknown_device:
+
+	plp
+
+	// Restore X and Y
+	ply_trash_a
+	plx_trash_a
+
+	// End wioth error
+	jmp lvs_device_not_found_error
+
+chrout_done_success:
+	
+	plp
+
+	// Restore X and Y
+	ply_trash_a
+	plx_trash_a
+
+	lda SCHAR
+	clc // indicate success
+	rts

c64/kernal/iostack/f1ca.interop

@@ -0,0 +1,8 @@
+All the Kernal routines, for which there are vectors in $0314-$0333, have to be available at their original addresses.
+
+Reason: some autostart software (https://codebase64.org/doku.php?id=base:autostarting_disk_files) override these vectors, so that some point
+to new locations (custom IRQ routine, custom STOP routine, etc.), while others points the original Kernal routines. Different techniques modify
+different vectors (while resetting others to original C64 locations), some don't change the vectors at all, but might still put the original
+C64 Kernal addresses there (for example, if the file overrides keyboard input buffer and screeen memory).
+
+For various cartridges (like IDE64) this just means disabling their extensions; for us that would mean improperly functionning Kernal.

c64/kernal/iostack/f4a5.load.s

@@ -40,9 +40,19 @@ LOAD:
 	// Check whether we support the requested device
 	lda FA
 
+#if CONFIG_TAPE_NORMAL
+	cmp #$01
+	beq_far load_tape_normal
+#endif
+
+#if CONFIG_TAPE_TURBO
+	cmp #$07
+	beq_far load_tape_turbo
+#endif
+
 #if CONFIG_IEC
 	jsr iec_check_devnum_lvs
 	bcc_far load_iec
-#endif // CONFIG_IEC
+#endif
 
 	jmp lvs_illegal_device_number