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Diffstat (limited to 'trunk/src/emu/machine/com8116.h')
-rw-r--r-- | trunk/src/emu/machine/com8116.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/trunk/src/emu/machine/com8116.h b/trunk/src/emu/machine/com8116.h new file mode 100644 index 00000000000..41137a5e95a --- /dev/null +++ b/trunk/src/emu/machine/com8116.h @@ -0,0 +1,108 @@ +/********************************************************************** + + 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) = + + + +///************************************************************************* +// 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); + + DECLARE_WRITE8_MEMBER( str_w ); + DECLARE_WRITE8_MEMBER( stt_w ); + +protected: + // device-level overrides + virtual void device_config_complete(); + virtual void device_start(); + 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 |