--- a/segacd.h	Sat Oct 21 11:51:24 2017 -0700
+++ b/segacd.h	Tue Dec 12 09:44:33 2017 -0800
@@ -0,0 +1,24 @@
+#ifndef SEGACD_H_
+#define SEGACD_H_
+#include <stdint.h>
+#include "system.h"
+#include "m68k_core.h"
+
+typedef struct {
+	m68k_context *m68k;
+	system_media *media;
+	uint16_t     gate_array[0x100];
+	uint8_t      busreq;
+	uint8_t      busack;
+	uint8_t      reset;
+	uint16_t     *rom;     //unaltered ROM, needed for mirrored locations
+	uint16_t     *rom_mut; //ROM with low 16-bit of HINT vector modified by register write
+	uint16_t     *prog_ram;
+	uint16_t     *work_ram;
+	uint8_t      *pcm_ram;
+	uint8_t      *bram;
+} segacd_context;
+
+segacd_context *alloc_configure_segacd(system_media *media, uint32_t opts, uint8_t force_region, rom_info *info);
+
+#endif //SEGACD_H_