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// license:BSD-3-Clause
// copyright-holders:hap
/*
Texas Instruments TMC0999 256x4 RAM
*/
#ifndef MAME_MACHINE_TMC0999_H
#define MAME_MACHINE_TMC0999_H
#pragma once
/*
quick pinout reference (18-pin DIP)
17,18,1,2: data outputs (do_r)
3-6: data inputs (di_w)
7: address latch strobe (adr_w)
13: data input strobe (wr_w)
14: data output enable (rd_w)
*/
class tmc0999_device : public device_t
{
public:
tmc0999_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
void di_w(u8 data);
u8 do_r();
void wr_w(int state);
void rd_w(int state);
void adr_w(int state);
protected:
// device-level overrides
virtual void device_start() override ATTR_COLD;
private:
// input pins state
u8 m_data;
int m_wr;
int m_rd;
int m_adr_strobe;
// internal state
u8 m_ram_address;
u8 m_ram[0x100];
};
DECLARE_DEVICE_TYPE(TMC0999, tmc0999_device)
#endif // MAME_MACHINE_TMC0999_H
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