// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** RIOT 6532 emulation ***************************************************************************/ #pragma once #ifndef __RIOT6532_H__ #define __RIOT6532_H__ #include "emu.h" //************************************************************************** // INTERFACE CONFIGURATION MACROS //************************************************************************** #define MCFG_RIOT6532_IN_PA_CB(_devcb) \ devcb = &riot6532_device::set_in_pa_callback(*device, DEVCB_##_devcb); #define MCFG_RIOT6532_OUT_PA_CB(_devcb) \ devcb = &riot6532_device::set_out_pa_callback(*device, DEVCB_##_devcb); #define MCFG_RIOT6532_IN_PB_CB(_devcb) \ devcb = &riot6532_device::set_in_pb_callback(*device, DEVCB_##_devcb); #define MCFG_RIOT6532_OUT_PB_CB(_devcb) \ devcb = &riot6532_device::set_out_pb_callback(*device, DEVCB_##_devcb); #define MCFG_RIOT6532_IRQ_CB(_devcb) \ devcb = &riot6532_device::set_irq_callback(*device, DEVCB_##_devcb); /*************************************************************************** TYPE DEFINITIONS ***************************************************************************/ // ======================> riot6532_device class riot6532_device : public device_t { public: // construction/destruction riot6532_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock); template static devcb_base &set_in_pa_callback(device_t &device, _Object object) { return downcast(device).m_in_pa_cb.set_callback(object); } template static devcb_base &set_out_pa_callback(device_t &device, _Object object) { return downcast(device).m_out_pa_cb.set_callback(object); } template static devcb_base &set_in_pb_callback(device_t &device, _Object object) { return downcast(device).m_in_pb_cb.set_callback(object); } template static devcb_base &set_out_pb_callback(device_t &device, _Object object) { return downcast(device).m_out_pb_cb.set_callback(object); } template static devcb_base &set_irq_callback(device_t &device, _Object object) { return downcast(device).m_irq_cb.set_callback(object); } DECLARE_READ8_MEMBER( read ); DECLARE_WRITE8_MEMBER( write ); UINT8 reg_r(UINT8 offset, bool debugger_access = false); void reg_w(UINT8 offset, UINT8 data); void porta_in_set(UINT8 data, UINT8 mask); void portb_in_set(UINT8 data, UINT8 mask); UINT8 porta_in_get(); UINT8 portb_in_get(); UINT8 porta_out_get(); UINT8 portb_out_get(); void timer_end(); protected: class riot6532_port { public: UINT8 m_in; UINT8 m_out; UINT8 m_ddr; devcb_read8 *m_in_cb; devcb_write8 *m_out_cb; }; // device-level overrides virtual void device_start() override; virtual void device_reset() override; virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; virtual void device_post_load() override { } virtual void device_clock_changed() override { } private: void update_irqstate(); UINT8 apply_ddr(const riot6532_port *port); void update_pa7_state(); UINT8 get_timer(); riot6532_port m_port[2]; devcb_read8 m_in_pa_cb; devcb_write8 m_out_pa_cb; devcb_read8 m_in_pb_cb; devcb_write8 m_out_pb_cb; devcb_write_line m_irq_cb; UINT8 m_irqstate; UINT8 m_irqenable; int m_irq; UINT8 m_pa7dir; /* 0x80 = high-to-low, 0x00 = low-to-high */ UINT8 m_pa7prev; UINT8 m_timershift; UINT8 m_timerstate; emu_timer * m_timer; enum { TIMER_END_CB }; }; // device type definition extern const device_type RIOT6532; #endif