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Another big change, this time to the NVR. It has been re-done, integrated with the RTC code, and is now ready to be used by other, non-AT-compatible systems, including an ISA card for PC/XT.

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waltje
2017-10-03 16:26:55 -04:00
parent a1b3c33054
commit 633adc6b02
31 changed files with 1027 additions and 911 deletions
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95
src/nvr.h
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@@ -6,32 +6,107 @@
*
* This file is part of the 86Box distribution.
*
* CMOS NVRAM emulation.
* Definitions for a defacto-standard RTC/NVRAM device.
*
* Version: @(#)nvr.h 1.0.2 2017/06/19
* Version: @(#)nvr.h 1.0.3 2017/10/02
*
* Authors: Sarah Walker, <http://pcem-emulator.co.uk/>
* Miran Grca, <mgrca8@gmail.com>
* Mahod,
* Fred N. van Kempen, <decwiz@yahoo.com>
*
* Copyright 2008-2017 Sarah Walker.
* Copyright 2016-2017 Miran Grca.
* Copyright 2016-2017 Mahod.
* Copyright 2017 Fred N. van Kempen.
*/
#ifndef EMU_NVR_H
# define EMU_NVR_H
extern int enable_sync;
extern int nvr_dosave;
/* Conversion from BCD to Binary and vice versa. */
#define RTC_BCD(x) (((x) % 10) | (((x) / 10) << 4))
#define RTC_DCB(x) ((((x) & 0xf0) >> 4) * 10 + ((x) & 0x0f))
/* RTC registers and bit definitions. */
#define RTC_SECONDS 0
#define RTC_ALSECONDS 1
#define RTC_MINUTES 2
#define RTC_ALMINUTES 3
#define RTC_HOURS 4
# define RTC_AMPM 0x80 /* PM flag if 12h format in use */
#define RTC_ALHOURS 5
#define RTC_DOW 6
#define RTC_DOM 7
#define RTC_MONTH 8
#define RTC_YEAR 9
#define RTC_REGA 10
# define REGA_UIP 0x80
# define REGA_DV2 0x40
# define REGA_DV1 0x20
# define REGA_DV0 0x10
# define REGA_DV 0x70
# define REGA_RS3 0x08
# define REGA_RS2 0x04
# define REGA_RS1 0x02
# define REGA_RS0 0x01
# define REGA_RS 0x0f
#define RTC_REGB 11
# define REGB_SET 0x80
# define REGB_PIE 0x40
# define REGB_AIE 0x20
# define REGB_UIE 0x10
# define REGB_SQWE 0x08
# define REGB_DM 0x04
# define REGB_2412 0x02
# define REGB_DSE 0x01
#define RTC_REGC 12
# define REGC_IRQF 0x80
# define REGC_PF 0x40
# define REGC_AF 0x20
# define REGC_UF 0x10
#define RTC_REGD 13
# define REGD_VRT 0x80
#define RTC_CENTURY 0x32 /* century register */
#define RTC_REGS 14 /* number of registers */
extern wchar_t *nvr_concat(wchar_t *to_concat);
extern void nvr_init(void);
extern FILE *nvrfopen(wchar_t *fn, wchar_t *mode);
extern void time_get(char *nvrram);
/* Define a (defacto-standard) RTC/NVRAM chip. */
typedef struct _nvr_ {
uint8_t regs[RTC_REGS+114]; /* these are the registers */
int upd_stat,
upd_ecount,
onesec_time,
onesec_cnt,
rtctime,
oldmachine;
int mask,
irq,
addr;
void (*set)(struct _nvr_ *, uint16_t, uint8_t);
uint8_t (*get)(struct _nvr_ *, uint16_t);
wchar_t *fname;
} nvr_t;
extern int enable_sync;
extern int nvr_dosave;
extern void nvr_init(nvr_t *);
extern void nvr_load(void);
extern void nvr_save(void);
extern void nvr_recalc(void);
extern void loadnvr(void);
extern void savenvr(void);
extern wchar_t *nvr_path(wchar_t *str);
extern FILE *nvr_fopen(wchar_t *str, wchar_t *mode);
extern void nvr_at_init(int irq);
#endif /*EMU_NVR_H*/