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PIT rewrite.

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This commit is contained in:
OBattler
2019-12-02 07:05:12 +01:00
parent 573246a353
commit a838e8548f
25 changed files with 887 additions and 635 deletions
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104
src/pit.h
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@@ -1,47 +1,53 @@
/*
* 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.
*
* Version: @(#)pit.h 1.0.0 2019/12/02
*
* Author: Miran Grca, <mgrca8@gmail.com>
* Copyright 2019 Miran Grca.
*/
#ifndef EMU_PIT_H
# define EMU_PIT_H
typedef struct {
int nr;
struct PIT *pit;
} PIT_nr;
uint8_t m, ctrl,
read_status, latch,
s1_det, l_det;
uint16_t rl;
int rm, wm, gate, out,
newcount, count, using_timer, latched,
state, null_count, do_read_status, pad1;
uint32_t l;
void (*load_func)(uint8_t new_m, int new_count);
void (*out_func)(int new_out, int old_out);
} ctr_t;
typedef struct PIT {
uint32_t l[3];
pc_timer_t timer[3];
uint8_t m[3];
uint8_t ctrl,
ctrls[3];
int wp,
rm[3],
wm[3];
uint16_t rl[3];
int thit[3];
int delay[3];
int rereadlatch[3];
int gate[3];
int out[3];
int running[3];
int enabled[3];
int newcount[3];
int count[3];
int using_timer[3];
int initial[3];
int latched[3];
int disabled[3];
int flags, clock;
pc_timer_t callback_timer;
uint8_t read_status[3];
int do_read_status[3];
ctr_t counters[3];
PIT_nr pit_nr[3];
void (*set_out_funcs[3])(int new_out, int old_out);
} PIT;
uint8_t ctrl;
} pit_t;
extern PIT pit,
pit2;
extern pit_t *pit,
*pit2;
extern double SYSCLK;
@@ -54,19 +60,37 @@ extern uint64_t PITCONST, ISACONST,
RTCCONST;
extern void pit_init(void);
extern void pit_ps2_init(void);
extern void pit_reset(PIT *pit);
extern void pit_set_gate(PIT *pit, int channel, int gate);
extern void pit_set_using_timer(PIT *pit, int t, int using_timer);
extern void pit_set_out_func(PIT *pit, int t, void (*func)(int new_out, int old_out));
extern uint16_t pit_ctr_get_count(ctr_t *ctr);
extern void pit_ctr_set_load_func(ctr_t *ctr, void (*func)(uint8_t new_m, int new_count));
extern void pit_ctr_set_out_func(ctr_t *ctr, void (*func)(int new_out, int old_out));
extern void pit_ctr_set_gate(ctr_t *ctr, int gate);
extern void pit_ctr_set_using_timer(ctr_t *ctr, int using_timer);
extern float pit_timer0_freq(void);
extern pit_t * pit_common_init(int type, void (*out0)(int new_out, int old_out), void (*out1)(int new_out, int old_out));
extern pit_t * pit_ps2_init(void);
extern void pit_reset(pit_t *dev);
extern void pit_irq0_timer(int new_out, int old_out);
extern void pit_irq0_timer_pcjr(int new_out, int old_out);
extern void pit_irq0_timer_ps2(int new_out, int old_out);
extern void pit_refresh_timer_xt(int new_out, int old_out);
extern void pit_refresh_timer_at(int new_out, int old_out);
extern void pit_speaker_timer(int new_out, int old_out);
extern void pit_nmi_timer_ps2(int new_out, int old_out);
extern void pit_set_clock(int clock);
extern void pit_handler(int set, uint16_t base, int size, void *priv);
#ifdef EMU_DEVICE_H
extern const device_t i8253_device;
extern const device_t i8254_device;
extern const device_t i8254_ext_io_device;
extern const device_t i8254_ps2_device;
#endif
#endif /*EMU_PIT_H*/