103 lines
2.3 KiB
C
103 lines
2.3 KiB
C
/*
|
|
* 86Box A hypervisor and IBM PC system emulator that specializes in
|
|
* running old operating systems and software designed for IBM
|
|
* PC systems and compatibles from 1981 through fairly recent
|
|
* system designs based on the PCI bus.
|
|
*
|
|
* This file is part of the 86Box distribution.
|
|
*
|
|
* Header of the implementation of the Intel 8253/8254
|
|
* Programmable Interval Timer.
|
|
*
|
|
*
|
|
*
|
|
* Authors: Miran Grca, <mgrca8@gmail.com>
|
|
*
|
|
* Copyright 2019-2020 Miran Grca.
|
|
*/
|
|
|
|
#ifndef EMU_PIT_FAST_H
|
|
#define EMU_PIT_FAST_H
|
|
|
|
typedef struct ctrf_t {
|
|
uint8_t m;
|
|
uint8_t ctrl;
|
|
uint8_t read_status;
|
|
uint8_t latch;
|
|
uint8_t bcd;
|
|
|
|
uint16_t rl;
|
|
|
|
int rm;
|
|
int wm;
|
|
int gate;
|
|
int out;
|
|
int newcount;
|
|
int clock;
|
|
int using_timer;
|
|
int latched;
|
|
int do_read_status;
|
|
int enabled;
|
|
int disabled;
|
|
int initial;
|
|
int thit;
|
|
int running;
|
|
int rereadlatch;
|
|
|
|
union {
|
|
int32_t count;
|
|
struct {
|
|
int32_t units : 4;
|
|
int32_t tens : 4;
|
|
int32_t hundreds : 4;
|
|
int32_t thousands : 4;
|
|
int32_t myriads : 4;
|
|
};
|
|
};
|
|
|
|
uint32_t l;
|
|
|
|
uint64_t pit_const;
|
|
|
|
pc_timer_t timer;
|
|
|
|
void (*load_func)(uint8_t new_m, int new_count);
|
|
void (*out_func)(int new_out, int old_out, void *priv);
|
|
void *priv;
|
|
} ctrf_t;
|
|
|
|
typedef struct pitf_t {
|
|
int flags;
|
|
ctrf_t counters[NUM_COUNTERS];
|
|
|
|
uint8_t ctrl;
|
|
|
|
void *dev_priv;
|
|
} pitf_t;
|
|
|
|
extern void pitf_set_pit_const(void *data, uint64_t pit_const);
|
|
|
|
extern void pitf_handler(int set, uint16_t base, int size, void *priv);
|
|
|
|
extern void pitf_ctr_set_out_func(void *data, int counter_id, void (*func)(int new_out, int old_out, void *priv));
|
|
|
|
extern void pitf_ctr_set_using_timer(void *data, int counter_id, int using_timer);
|
|
|
|
extern void pitf_ctr_set_gate(void *data, int counter_id, int gate);
|
|
|
|
extern void pitf_ctr_clock(void *data, int counter_id);
|
|
|
|
extern uint8_t pitf_read_reg(void *priv, uint8_t reg);
|
|
|
|
extern const pit_intf_t pit_fast_intf;
|
|
|
|
#ifdef EMU_DEVICE_H
|
|
extern const device_t i8253_fast_device;
|
|
extern const device_t i8254_fast_device;
|
|
extern const device_t i8254_sec_fast_device;
|
|
extern const device_t i8254_ext_io_fast_device;
|
|
extern const device_t i8254_ps2_fast_device;
|
|
#endif
|
|
|
|
#endif /*EMU_PIT_FAST_H*/
|