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// license:BSD-3-Clause
// copyright-holders:Frank Palazzolo, Aaron Giles, Jonathan Gevaryahu, Raphael Nabet, Couriersud, Michael Zapf
/*
* Voice Synthesis Memory
*
*/
#ifndef __SPCHROMS_H
#define __SPCHROMS_H
#include "emu.h"
class speechrom_device : public device_t
{
public:
// construction/destruction
speechrom_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
/// TODO: implement bus behaviour
int read(int count);
void load_address(int data);
void read_and_branch();
void set_reverse_bit_order(bool reverse) { m_reverse = reverse; }
// device-level overrides
virtual void device_start();
private:
UINT8 *m_speechrom_data; /* pointer to speech ROM data */
unsigned int m_speechROMlen; /* length of data pointed by speechrom_data, from 0 to 2^18 */
unsigned int m_speechROMaddr; /* 18 bit pointer in ROM */
int m_load_pointer; /* which 4-bit nibble will be affected by load address */
int m_ROM_bits_count; /* current bit position in ROM */
bool m_reverse;
};
// device type definition
extern const device_type SPEECHROM;
#endif
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