// license:BSD-3-Clause // copyright-holders:Michael Zapf /**************************************************************************** TMS9901 Programmable System Interface See tms9901.c for documentation Raphael Nabet Michael Zapf February 2012: Rewritten as class *****************************************************************************/ #ifndef __TMS9901_H__ #define __TMS9901_H__ #include "emu.h" extern const device_type TMS9901; /*************************************************************************** MACROS ***************************************************************************/ // Masks for the interrupts levels available on TMS9901 #define TMS9901_INT1 0x0002 #define TMS9901_INT2 0x0004 #define TMS9901_INT3 0x0008 // overridden by the timer interrupt #define TMS9901_INT4 0x0010 #define TMS9901_INT5 0x0020 #define TMS9901_INT6 0x0040 #define TMS9901_INT7 0x0080 #define TMS9901_INT8 0x0100 #define TMS9901_INT9 0x0200 #define TMS9901_INTA 0x0400 #define TMS9901_INTB 0x0800 #define TMS9901_INTC 0x1000 #define TMS9901_INTD 0x2000 #define TMS9901_INTE 0x4000 #define TMS9901_INTF 0x8000 enum { TMS9901_CB_INT7 = 0, TMS9901_INT8_INT15 = 1, TMS9901_P0_P7 = 2, TMS9901_P8_P15 = 3 }; /*************************************************************************** CLASS DEFINITION ***************************************************************************/ class tms9901_device : public device_t { public: tms9901_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); void set_single_int(int pin_number, int state); DECLARE_WRITE_LINE_MEMBER( rst1_line ); DECLARE_READ8_MEMBER( read ); DECLARE_WRITE8_MEMBER( write ); template static devcb_base &static_set_readblock_callback(device_t &device, _Object object) { return downcast(device).m_read_block.set_callback(object); } template static devcb_base &static_set_p0_callback(device_t &device, _Object object) { return downcast(device).m_write_p0.set_callback(object); } template static devcb_base &static_set_p1_callback(device_t &device, _Object object) { return downcast(device).m_write_p1.set_callback(object); } template static devcb_base &static_set_p2_callback(device_t &device, _Object object) { return downcast(device).m_write_p2.set_callback(object); } template static devcb_base &static_set_p3_callback(device_t &device, _Object object) { return downcast(device).m_write_p3.set_callback(object); } template static devcb_base &static_set_p4_callback(device_t &device, _Object object) { return downcast(device).m_write_p4.set_callback(object); } template static devcb_base &static_set_p5_callback(device_t &device, _Object object) { return downcast(device).m_write_p5.set_callback(object); } template static devcb_base &static_set_p6_callback(device_t &device, _Object object) { return downcast(device).m_write_p6.set_callback(object); } template static devcb_base &static_set_p7_callback(device_t &device, _Object object) { return downcast(device).m_write_p7.set_callback(object); } template static devcb_base &static_set_p8_callback(device_t &device, _Object object) { return downcast(device).m_write_p8.set_callback(object); } template static devcb_base &static_set_p9_callback(device_t &device, _Object object) { return downcast(device).m_write_p9.set_callback(object); } template static devcb_base &static_set_p10_callback(device_t &device, _Object object) { return downcast(device).m_write_p10.set_callback(object); } template static devcb_base &static_set_p11_callback(device_t &device, _Object object) { return downcast(device).m_write_p11.set_callback(object); } template static devcb_base &static_set_p12_callback(device_t &device, _Object object) { return downcast(device).m_write_p12.set_callback(object); } template static devcb_base &static_set_p13_callback(device_t &device, _Object object) { return downcast(device).m_write_p13.set_callback(object); } template static devcb_base &static_set_p14_callback(device_t &device, _Object object) { return downcast(device).m_write_p14.set_callback(object); } template static devcb_base &static_set_p15_callback(device_t &device, _Object object) { return downcast(device).m_write_p15.set_callback(object); } template static devcb_base &static_set_intlevel_callback(device_t &device, _Object object) { return downcast(device).m_interrupt.set_callback(object); } private: static const device_timer_id DECREMENTER = 0; virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; void timer_reload(void); void field_interrupts(void); void device_start(void) override; void device_stop(void) override; void device_reset(void) override; // Common method for device_reset and rst1_line void do_reset(); // State of the INT1-INT15 lines (must be inverted when queried) // Note that the levels must also be delivered when reading the pins, which // may require to latch the int levels. int m_int_state; int m_old_int_state; // stores the previous value to avoid useless INT line assertions int m_enabled_ints; // interrupt enable mask bool m_int_pending; // status of the int* pin (connected to TMS9900) bool m_timer_int_pending; // timer int pending (overrides int3 pin if timer enabled) // PIO registers int m_pio_direction; // direction register for PIO // current PIO output (to be masked with pio_direction) int m_pio_output; // mirrors used for INT7*-INT15* int m_pio_direction_mirror; int m_pio_output_mirror; // ======================================================================= // TMS9901 clock mode // false = so-called interrupt mode (read interrupt state, write interrupt enable mask) // true = clock mode (read/write clock interval) bool m_clock_mode; // MESS timer, used to emulate the decrementer register emu_timer *m_decrementer; // clock interval, loaded in decrementer when it reaches 0. // 0 means decrementer off int m_clock_register; // Current decrementer value int m_decrementer_value; // when we go into timer mode, the decrementer is copied there to allow to read it reliably int m_clock_read_register; // ======================================================================= // Read callback. devcb_read8 m_read_block; // I/O lines, used for output. When used as inputs, the levels are delivered via the m_read_block devcb_write_line m_write_p0; devcb_write_line m_write_p1; devcb_write_line m_write_p2; devcb_write_line m_write_p3; devcb_write_line m_write_p4; devcb_write_line m_write_p5; devcb_write_line m_write_p6; devcb_write_line m_write_p7; devcb_write_line m_write_p8; devcb_write_line m_write_p9; devcb_write_line m_write_p10; devcb_write_line m_write_p11; devcb_write_line m_write_p12; devcb_write_line m_write_p13; devcb_write_line m_write_p14; devcb_write_line m_write_p15; // The invocation corresponds to the INTREQ signal (with the level passed as data) // and the address delivers the interrupt level (0-15) devcb_write8 m_interrupt; }; /*************************************************************************** DEVICE CONFIGURATION MACROS ***************************************************************************/ #define MCFG_TMS9901_READBLOCK_HANDLER( _read ) \ devcb = &tms9901_device::static_set_readblock_callback( *device, DEVCB_##_read ); #define MCFG_TMS9901_P0_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p0_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_P1_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p1_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_P2_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p2_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_P3_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p3_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_P4_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p4_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_P5_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p5_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_P6_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p6_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_P7_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p7_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_P8_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p8_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_P9_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p9_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_P10_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p10_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_P11_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p11_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_P12_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p12_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_P13_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p13_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_P14_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p14_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_P15_HANDLER( _write ) \ devcb = &tms9901_device::static_set_p15_callback( *device, DEVCB_##_write ); #define MCFG_TMS9901_INTLEVEL_HANDLER( _intlevel ) \ devcb = &tms9901_device::static_set_intlevel_callback( *device, DEVCB_##_intlevel ); #endif /* __TMS9901_H__ */