The, uhh, missing stufff.........

src/cdrom_null.c

@@ -0,0 +1,130 @@
+/* Copyright holders: Sarah Walker
+   see COPYING for more details
+*/
+#include "ibm.h"
+#include "cdrom.h"
+#include "cdrom_ioctl.h"
+
+static CDROM null_cdrom;
+
+static int null_ready(uint8_t id)
+{
+        return 0;
+}
+
+/* Always return 0, the contents of a null CD-ROM drive never change. */
+static int null_medium_changed(uint8_t id)
+{
+        return 0;
+}
+
+static uint8_t null_getcurrentsubchannel(uint8_t id, uint8_t *b, int msf)
+{
+        return 0x13;
+}
+
+static void null_eject(uint8_t id)
+{
+}
+
+static void null_load(uint8_t id)
+{
+}
+
+static int null_readsector_raw(uint8_t id, uint8_t *buffer, int sector, int ismsf, int cdrom_sector_type, int cdrom_sector_flags, int *len)
+{
+	*len = 0;
+	return 0;
+}
+
+static int null_readtoc(uint8_t id, unsigned char *b, unsigned char starttrack, int msf, int maxlen, int single)
+{
+        return 0;
+}
+
+static int null_readtoc_session(uint8_t id, unsigned char *b, int msf, int maxlen)
+{
+		return 0;
+}
+
+static int null_readtoc_raw(uint8_t id, unsigned char *b, int msf, int maxlen)
+{
+		return 0;
+}
+
+static uint32_t null_size(uint8_t id)
+{
+        return 0;
+}
+
+static int null_status(uint8_t id)
+{
+	return CD_STATUS_EMPTY;
+}
+
+void cdrom_null_reset(uint8_t id)
+{
+}
+
+void cdrom_set_null_handler(uint8_t id);
+
+int cdrom_null_open(uint8_t id, char d)
+{
+	cdrom_set_null_handler(id);
+        return 0;
+}
+
+void null_close(uint8_t id)
+{
+}
+
+static void null_exit(uint8_t id)
+{
+}
+
+static int null_is_track_audio(uint8_t id, uint32_t pos, int ismsf)
+{
+	return 0;
+}
+
+static int null_pass_through(uint8_t id, uint8_t *in_cdb, uint8_t *b, uint32_t *len)
+{
+	return 0;
+}
+
+static int null_media_type_id(uint8_t id)
+{
+	return 0x70;
+}
+
+void cdrom_set_null_handler(uint8_t id)
+{
+	cdrom_drives[id].handler = &null_cdrom;
+	cdrom_drives[id].host_drive = 0;
+	update_status_bar_icon_state(0x10 | id, 1);
+}
+
+static CDROM null_cdrom =
+{
+	null_ready,
+	null_medium_changed,
+	null_media_type_id,
+	NULL,
+	NULL,
+        null_readtoc,
+        null_readtoc_session,
+	null_readtoc_raw,
+        null_getcurrentsubchannel,
+        null_pass_through,
+	null_readsector_raw,
+        NULL,
+        null_load,
+        null_eject,
+        NULL,
+        NULL,
+        null_size,
+	null_status,
+	null_is_track_audio,
+        NULL,
+        null_exit
+};