/********************************************************************** 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, _config) \ MCFG_DEVICE_ADD(_tag, COM8116, _clock) \ MCFG_DEVICE_CONFIG(_config) #define COM8116_INTERFACE(name) \ const com8116_interface (name) = #define COM8116_DIVISORS_16X_5_0688MHz \ { 6336, 4224, 2880, 2355, 2112, 1056, 528, 264, 176, 158, 132, 88, 66, 44, 33, 16 } #define COM8116_DIVISORS_16X_4_9152MHz \ { 6144, 4096, 2793, 2284, 2048, 1024, 512, 256, 171, 154, 128, 85, 64, 43, 32, 16 } #define COM8116_DIVISORS_32X_5_0688MHz \ { 3168, 2112, 1440, 1177, 1056, 792, 528, 264, 132, 88, 66, 44, 33, 22, 16, 8 } ///************************************************************************* // TYPE DEFINITIONS ///************************************************************************* // ======================> com8116_interface struct com8116_interface { devcb_write_line m_out_fx4_cb; devcb_write_line m_out_fr_cb; devcb_write_line m_out_ft_cb; // receiver divisor ROM (19-bit) UINT32 m_fr_divisors[16]; // transmitter divisor ROM (19-bit) UINT32 m_ft_divisors[16]; }; // ======================> com8116_device class com8116_device : public device_t, public com8116_interface { public: // construction/destruction com8116_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); void str_w(UINT8 data); DECLARE_WRITE8_MEMBER( str_w ); void stt_w(UINT8 data); DECLARE_WRITE8_MEMBER( stt_w ); protected: // device-level overrides virtual void device_config_complete(); 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: static const device_timer_id TIMER_FX4 = 0; static const device_timer_id TIMER_FR = 1; static const device_timer_id TIMER_FT = 2; devcb_resolved_write_line m_out_fx4_func; devcb_resolved_write_line m_out_fr_func; devcb_resolved_write_line m_out_ft_func; int m_fr; // receiver frequency int m_ft; // transmitter frequency // 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