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// license:BSD-3-Clause
// copyright-holders:Eric Smith
/*
* mathbox.h: math box simulation (Battlezone/Red Baron/Tempest)
*
* Copyright Eric Smith
*
*/
#ifndef MAME_MACHINE_MATHBOX_H
#define MAME_MACHINE_MATHBOX_H
#pragma once
/* ----- device interface ----- */
class mathbox_device : public device_t
{
public:
mathbox_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
void go_w(offs_t offset, uint8_t data);
uint8_t status_r();
uint8_t lo_r();
uint8_t hi_r();
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
private:
// internal state
/* math box scratch registers */
int16_t m_reg[16]{};
/* math box result */
int16_t m_result = 0;
};
DECLARE_DEVICE_TYPE(MATHBOX, mathbox_device)
#endif // MAME_MACHINE_MATHBOX_H
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