start on port

libs/arcadeshield/arcadesound.h

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+// Autogenerated C header file for Arcade sound
+#ifndef _JACDAC_SPEC_ARCADE_SOUND_H
+#define _JACDAC_SPEC_ARCADE_SOUND_H 1
+
+#define JD_SERVICE_CLASS_ARCADE_SOUND  0x1fc63606
+
+/**
+ * Argument: samples bytes. Play samples, which are single channel, signed 16-bit little endian values.
+ */
+#define JD_ARCADE_SOUND_CMD_PLAY 0x80
+
+/**
+ * Read-write Hz u22.10 (uint32_t). Get or set playback sample rate (in samples per second).
+ * If you set it, read it back, as the value may be rounded up or down.
+ */
+#define JD_ARCADE_SOUND_REG_SAMPLE_RATE 0x80
+
+/**
+ * Constant B uint32_t. The size of the internal audio buffer.
+ */
+#define JD_ARCADE_SOUND_REG_BUFFER_SIZE 0x180
+
+/**
+ * Read-only B uint32_t. How much data is still left in the buffer to play.
+ * Clients should not send more data than `buffer_size - buffer_pending`,
+ * but can keep the `buffer_pending` as low as they want to ensure low latency
+ * of audio playback.
+ */
+#define JD_ARCADE_SOUND_REG_BUFFER_PENDING 0x181
+
+#endif