--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ymz263b.h	Fri Feb 23 01:16:38 2024 -0800
@@ -0,0 +1,50 @@
+#ifndef YMZ263B_H_
+#define YMZ263B_H_
+
+#include <stdint.h>
+#include "render_audio.h"
+#include "oscilloscope.h"
+
+typedef struct {
+	uint8_t fifo[128];
+	uint8_t fifo_read;
+	uint8_t fifo_write;
+	
+	uint8_t regs[4];
+} ymz263b_pcm;
+
+typedef struct {
+	uint8_t fifo[16];
+	uint8_t read;
+	uint8_t write;
+} ymz_midi_fifo;
+
+typedef struct {
+	audio_source  *audio;
+	oscilloscope  *scope;
+	ymz263b_pcm   pcm[2];
+	ymz_midi_fifo midi_rcv;
+	ymz_midi_fifo midi_trs;
+	
+	uint32_t      clock_inc;
+	uint32_t      cycle;
+	
+	uint16_t      timers[4];
+	
+	uint16_t      status;
+	
+	uint8_t       base_regs[9];
+	uint8_t       midi_regs[2];
+	uint8_t       address;
+	uint8_t       midi_transmit;
+} ymz263b;
+
+void ymz263b_init(ymz263b *ymz, uint32_t clock_divider);
+void ymz263b_run(ymz263b *ymz, uint32_t target_cycle);
+uint32_t ymz263b_next_int(ymz263b *ymz);
+void ymz263b_address_write(ymz263b *ymz, uint8_t value);
+void ymz263b_data_write(ymz263b *ymz, uint32_t channel, uint8_t value);
+uint8_t ymz263b_data_read(ymz263b *ymz, uint32_t channel);
+uint8_t ymz263b_status_read(ymz263b *ymz);
+
+#endif //YMZ263B_H_