// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
COM8116 Dual Baud Rate Generator (Programmable Divider) emulation
COM5016 is a mostly-compatible clone of this chip, with +12V on
pin 9 rather than NC.
**********************************************************************
_____ _____
XTAL/EXT1 1 |* \_/ | 18 XTAL/EXT2
+5V 2 | | 17 fT
fR 3 | | 16 Ta
Ra 4 | COM8116 | 15 Tb
Rb 5 | COM8116T | 14 Tc
Rc 6 | COM8136 | 13 Td
Rd 7 | COM8136T | 12 STT
STR 8 | | 11 GND
NC 9 |_____________| 10 fX/4
**********************************************************************/
#ifndef MAME_MACHINE_COM8116_H
#define MAME_MACHINE_COM8116_H
#pragma once
///*************************************************************************
// INTERFACE CONFIGURATION MACROS
///*************************************************************************
#define MCFG_COM8116_FX4_HANDLER(_devcb) \
devcb = &downcast<com8116_device &>(*device).set_fx4_handler(DEVCB_##_devcb);
#define MCFG_COM8116_FR_HANDLER(_devcb) \
devcb = &downcast<com8116_device &>(*device).set_fr_handler(DEVCB_##_devcb);
#define MCFG_COM8116_FT_HANDLER(_devcb) \
devcb = &downcast<com8116_device &>(*device).set_ft_handler(DEVCB_##_devcb);
///*************************************************************************
// TYPE DEFINITIONS
///*************************************************************************
// ======================> com8116_device
class com8116_device : public device_t
{
public:
// construction/destruction
com8116_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
template <class Object> devcb_base &set_fx4_handler(Object &&cb) { return m_fx4_handler.set_callback(std::forward<Object>(cb)); }
template <class Object> devcb_base &set_fr_handler(Object &&cb) { return m_fr_handler.set_callback(std::forward<Object>(cb)); }
template <class Object> devcb_base &set_ft_handler(Object &&cb) { return m_ft_handler.set_callback(std::forward<Object>(cb)); }
void write_str(uint8_t data);
void write_stt(uint8_t data);
DECLARE_WRITE8_MEMBER(str_w) { write_str(data); }
DECLARE_WRITE8_MEMBER(stt_w) { write_stt(data); }
DECLARE_WRITE8_MEMBER(str_stt_w);
DECLARE_WRITE8_MEMBER(stt_str_w);
protected:
com8116_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock, const int *divisors);
static const int divisors_16X_5_0688MHz[16];
static const int divisors_16X_6_01835MHz[16];
static const int divisors_16X_4_9152MHz[16];
static const int divisors_32X_5_0688MHz[16];
static const int divisors_16X_2_7648MHz[16];
static const int divisors_16X_5_0688MHz_030[16];
static const int divisors_16X_4_6080MHz[16];
static const int divisors_16X_4_9152MHz_SY2661_1[16];
static const int divisors_16X_4_9152MHz_SY2661_2[16];
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_timer(emu_timer &timer, device_timer_id id, int m_param, void *ptr) override;
private:
enum
{
TIMER_FX4,
TIMER_FR,
TIMER_FT
};
devcb_write_line m_fx4_handler;
devcb_write_line m_fr_handler;
devcb_write_line m_ft_handler;
int m_fx4;
int m_fr;
int m_ft;
const int *const m_divisors;
// timers
emu_timer *m_fx4_timer;
emu_timer *m_fr_timer;
emu_timer *m_ft_timer;
};
// ======================> com8116_003_device
class com8116_003_device : public com8116_device
{
public:
// construction/destruction
com8116_003_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
// ======================> com5016_5_device
class com5016_5_device : public com8116_device
{
public:
// construction/destruction
com5016_5_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
// ======================> com5016_013_device
class com5016_013_device : public com8116_device
{
public:
// construction/destruction
com5016_013_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
};
// device type definition
DECLARE_DEVICE_TYPE(COM8116, com8116_device)
DECLARE_DEVICE_TYPE(COM8116_003, com8116_003_device)
DECLARE_DEVICE_TYPE(COM5016_5, com5016_5_device)
DECLARE_DEVICE_TYPE(COM5016_013, com5016_013_device)
#endif // MAME_MACHINE_COM8116_H