84bf5f4d14
This change updates the 3B2 README.md file, and fixes all line endings on 3B2 source files.
78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/* 3b2_timer.h: 8253/82C54 Interval Timer
|
|
|
|
Copyright (c) 2021-2022, Seth J. Morabito
|
|
|
|
Permission is hereby granted, free of charge, to any person
|
|
obtaining a copy of this software and associated documentation
|
|
files (the "Software"), to deal in the Software without
|
|
restriction, including without limitation the rights to use, copy,
|
|
modify, merge, publish, distribute, sublicense, and/or sell copies
|
|
of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be
|
|
included in all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
SOFTWARE.
|
|
|
|
Except as contained in this notice, the name of the author shall
|
|
not be used in advertising or otherwise to promote the sale, use or
|
|
other dealings in this Software without prior written authorization
|
|
from the author.
|
|
*/
|
|
|
|
#ifndef _3B2_TIMER_H_
|
|
#define _3B2_TIMER_H_
|
|
|
|
#include "3b2_defs.h"
|
|
|
|
#define TIMER_REG_DIVA 0x03
|
|
#define TIMER_REG_DIVB 0x07
|
|
#define TIMER_REG_DIVC 0x0b
|
|
#define TIMER_REG_CTRL 0x0f
|
|
#define TIMER_CLR_LATCH 0x13
|
|
|
|
#define TIMER_MODE(ctr) (((ctr->ctrl) >> 1) & 7)
|
|
#define TIMER_RW(ctr) (((ctr->ctrl) >> 4) & 3)
|
|
|
|
#define CLK_LATCH 0
|
|
#define CLK_LSB 1
|
|
#define CLK_MSB 2
|
|
#define CLK_LMB 3
|
|
|
|
#define TMR_SANITY 0
|
|
#define TMR_INT 1
|
|
#define TMR_BUS 2
|
|
|
|
struct timer_ctr {
|
|
uint16 divider;
|
|
uint16 val;
|
|
uint8 ctrl_latch;
|
|
uint16 cnt_latch;
|
|
uint8 ctrl;
|
|
t_bool r_lmb;
|
|
t_bool w_lmb;
|
|
t_bool enabled;
|
|
t_bool gate;
|
|
t_bool r_ctrl_latch;
|
|
t_bool r_cnt_latch;
|
|
};
|
|
|
|
t_stat timer_reset(DEVICE *dptr);
|
|
uint32 timer_read(uint32 pa, size_t size);
|
|
void timer_write(uint32 pa, uint32 val, size_t size);
|
|
void timer_gate(uint8 ctrnum, t_bool inhibit);
|
|
|
|
t_stat tmr_svc(UNIT *uptr);
|
|
t_stat tmr_int_svc(UNIT *uptr);
|
|
CONST char *tmr_description(DEVICE *dptr);
|
|
t_stat tmr_help(FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, const char *cptr);
|
|
|
|
#endif /* _3B2_TIMER_H_ */
|