// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Intel 8214 Priority Interrupt Controller emulation ********************************************************************** _____ _____ _B0 1 |* \_/ | 24 Vcc _B1 2 | | 23 _ECS _B2 3 | | 22 _R7 _SGS 4 | | 21 _R6 _INT 5 | | 20 _R5 _CLK 6 | 8214 | 19 _R4 INTE 7 | | 18 _R3 _A0 8 | | 17 _R2 _A1 9 | | 16 _R1 _A2 10 | | 15 _R0 _ELR 11 | | 14 ENLG GND 12 |_____________| 13 ETLG **********************************************************************/ #pragma once #ifndef __I8214__ #define __I8214__ #include "emu.h" ///************************************************************************* // INTERFACE CONFIGURATION MACROS ///************************************************************************* #define MCFG_I8214_IRQ_CALLBACK(_write) \ devcb = &i8214_device::set_irq_wr_callback(*device, DEVCB_##_write); #define MCFG_I8214_ENLG_CALLBACK(_write) \ devcb = &i8214_device::set_enlg_wr_callback(*device, DEVCB_##_write); ///************************************************************************* // TYPE DEFINITIONS ///************************************************************************* // ======================> i8214_device class i8214_device : public device_t { public: // construction/destruction i8214_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock); template static devcb_base &set_irq_wr_callback(device_t &device, _Object object) { return downcast(device).m_write_irq.set_callback(object); } template static devcb_base &set_enlg_wr_callback(device_t &device, _Object object) { return downcast(device).m_write_enlg.set_callback(object); } DECLARE_WRITE_LINE_MEMBER( sgs_w ); DECLARE_WRITE_LINE_MEMBER( etlg_w ); DECLARE_WRITE_LINE_MEMBER( inte_w ); UINT8 a_r(); void b_w(UINT8 data); void r_w(UINT8 data); protected: // device-level overrides virtual void device_start() override; private: inline void trigger_interrupt(int level); inline void check_interrupt(); devcb_write_line m_write_irq; devcb_write_line m_write_enlg; int m_inte; // interrupt enable int m_int_dis; // interrupt disable flip-flop int m_a; // request level int m_b; // current status register UINT8 m_r; // interrupt request latch int m_sgs; // status group select int m_etlg; // enable this level group }; // device type definition extern const device_type I8214; #endif