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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/***************************************************************************
Intersil IM6402 Universal Asynchronous Receiver/Transmitter emulation
****************************************************************************
_____ _____
Vcc 1 |* \_/ | 40 NOTE
NOTE 2 | | 39 EPE
GND 3 | | 38 CLS1
RRD 4 | | 37 CLS2
RBR8 5 | | 36 SBS
RBR7 6 | | 35 PI
RBR6 7 | | 34 CRL
RBR5 8 | | 33 TBR8
RBR4 9 | | 32 TBR7
RBR3 10 | IM6402 | 31 TBR6
RBR2 11 | IM6403 | 30 TBR5
RBR1 12 | | 29 TBR4
PE 13 | | 28 TBR3
FE 14 | | 27 TBR2
OE 15 | | 26 TBR1
SFD 16 | | 25 TRO
NOTE 17 | | 24 TRE
DRR 18 | | 23 TRBL
DR 19 | | 22 TBRE
RRI 20 |_____________| 21 MR
NOTE: PIN IM6402 IM6403
---------------------------
2 N/C CONTROL
17 RRC OSC IN
40 TRC OSC OUT
***************************************************************************/
#ifndef MAME_MACHINE_IM6402_H
#define MAME_MACHINE_IM6402_H
#pragma once
#include "diserial.h"
class im6402_device : public device_t, public device_serial_interface
{
public:
// construction/destruction
im6402_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t rrc, uint32_t trc)
: im6402_device(mconfig, tag, owner, 0)
{
set_rrc(rrc);
set_trc(trc);
}
im6402_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
void set_rrc(int rrc) { m_rrc = rrc; }
void set_trc(int trc) { m_trc = trc; }
auto tro_callback() { return m_write_tro.bind(); }
auto dr_callback() { return m_write_dr.bind(); }
auto tbre_callback() { return m_write_tbre.bind(); }
auto tre_callback() { return m_write_tre.bind(); }
uint8_t read() { return m_rbr; }
void write(uint8_t data);
int dr_r() { return m_dr; }
int tbre_r() { return m_tbre; }
int tre_r() { return m_tre; }
int pe_r() { return m_pe; }
int fe_r() { return m_fe; }
int oe_r() { return m_oe; }
void write_rri(int state); // receiver register input
void rrc_w(int state);
void trc_w(int state);
void rrd_w(int state);
void sfd_w(int state);
void drr_w(int state);
void mr_w(int state);
void crl_w(int state);
void pi_w(int state);
void sbs_w(int state);
void cls1_w(int state);
void cls2_w(int state);
void epe_w(int state);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// device_serial_interface overrides
virtual void tra_callback() override;
virtual void tra_complete() override;
virtual void rcv_callback() override;
virtual void rcv_complete() override;
private:
inline void set_dr(int state);
inline void set_tbre(int state);
inline void set_tre(int state);
devcb_write_line m_write_tro;
devcb_write_line m_write_dr;
devcb_write_line m_write_tbre;
devcb_write_line m_write_tre;
// status
int m_dr;
int m_tbre;
int m_tre;
int m_pe;
int m_fe;
int m_oe;
// control
int m_cls1;
int m_cls2;
int m_sbs;
int m_sfd;
int m_epe;
int m_pi;
// receiver
uint8_t m_rbr;
int m_rrc;
int m_rrc_count;
// transmitter
uint8_t m_tbr;
int m_trc;
int m_trc_count;
};
DECLARE_DEVICE_TYPE(IM6402, im6402_device)
#endif // MAME_MACHINE_IM6402_H
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