/********************************************************************** COM8116 Dual Baud Rate Generator (Programmable Divider) emulation Copyright MESS Team. Visit http://mamedev.org for licensing and usage restrictions. ********************************************************************** _____ _____ 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 **********************************************************************/ #pragma once #ifndef __COM8116__ #define __COM8116__ #include "emu.h" ///************************************************************************* // INTERFACE CONFIGURATION MACROS ///************************************************************************* #define MCFG_COM8116_ADD(_tag, _clock, _fx4, _fr, _ft) \ MCFG_DEVICE_ADD(_tag, COM8116, _clock) \ downcast(device)->set_fx4_callback(DEVCB2_##_fx4); \ downcast(device)->set_fr_callback(DEVCB2_##_fr); \ downcast(device)->set_ft_callback(DEVCB2_##_ft); ///************************************************************************* // 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 clock); template void set_fx4_callback(_fx4 fx4) { m_write_fx4.set_callback(fx4); } template void set_fr_callback(_fr fr) { m_write_fr.set_callback(fr); } template void set_ft_callback(_ft ft) { m_write_ft.set_callback(ft); } void str_w(UINT8 data); DECLARE_WRITE8_MEMBER( str_w ); void stt_w(UINT8 data); DECLARE_WRITE8_MEMBER( stt_w ); static const int divisors_16X_5_0688MHz[]; static const int divisors_16X_4_9152MHz[]; static const int divisors_32X_5_0688MHz[]; protected: // device-level overrides virtual void device_start(); virtual void device_reset(); virtual void device_timer(emu_timer &timer, device_timer_id id, int m_param, void *ptr); private: enum { TIMER_FX4, TIMER_FR, TIMER_FT }; devcb2_write_line m_write_fx4; devcb2_write_line m_write_fr; devcb2_write_line m_write_ft; int m_fr; // receiver frequency int m_ft; // transmitter frequency const int *m_fr_divisors; const int *m_ft_divisors; // timers emu_timer *m_fx4_timer; emu_timer *m_fr_timer; emu_timer *m_ft_timer; }; // device type definition extern const device_type COM8116; #endif