e0030bc93c
Bugfixes in config.c regarding CD-ROM defaults and IDE channel reading; Applied all the PCem Voodoo commits; The Sound Blaster cards' OPL can now be disabled for slight performance gain.
120 lines
2.8 KiB
C
120 lines
2.8 KiB
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Definitions for a defacto-standard RTC/NVRAM device.
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*
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* Version: @(#)nvr.h 1.0.5 2017/11/22
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*
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* Authors: Miran Grca, <mgrca8@gmail.com>
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* Mahod,
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* Fred N. van Kempen, <decwiz@yahoo.com>
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*
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* Copyright 2016-2017 Miran Grca.
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* Copyright 2016-2017 Mahod.
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* Copyright 2017 Fred N. van Kempen.
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*/
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#ifndef EMU_NVR_H
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# define EMU_NVR_H
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/* Conversion from BCD to Binary and vice versa. */
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#define RTC_BCD(x) (((x) % 10) | (((x) / 10) << 4))
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#define RTC_DCB(x) ((((x) & 0xf0) >> 4) * 10 + ((x) & 0x0f))
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/* RTC registers and bit definitions. */
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#define RTC_SECONDS 0
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#define RTC_ALSECONDS 1
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#define RTC_MINUTES 2
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#define RTC_ALMINUTES 3
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#define RTC_HOURS 4
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# define RTC_AMPM 0x80 /* PM flag if 12h format in use */
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#define RTC_ALHOURS 5
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#define RTC_DOW 6
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#define RTC_DOM 7
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#define RTC_MONTH 8
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#define RTC_YEAR 9
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#define RTC_REGA 10
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# define REGA_UIP 0x80
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# define REGA_DV2 0x40
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# define REGA_DV1 0x20
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# define REGA_DV0 0x10
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# define REGA_DV 0x70
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# define REGA_RS3 0x08
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# define REGA_RS2 0x04
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# define REGA_RS1 0x02
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# define REGA_RS0 0x01
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# define REGA_RS 0x0f
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#define RTC_REGB 11
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# define REGB_SET 0x80
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# define REGB_PIE 0x40
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# define REGB_AIE 0x20
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# define REGB_UIE 0x10
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# define REGB_SQWE 0x08
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# define REGB_DM 0x04
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# define REGB_2412 0x02
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# define REGB_DSE 0x01
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#define RTC_REGC 12
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# define REGC_IRQF 0x80
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# define REGC_PF 0x40
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# define REGC_AF 0x20
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# define REGC_UF 0x10
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#define RTC_REGD 13
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# define REGD_VRT 0x80
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#define RTC_CENTURY 0x32 /* century register */
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#define RTC_REGS 14 /* number of registers */
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/* Define a (defacto-standard) RTC/NVRAM chip. */
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typedef struct _nvr_ {
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uint8_t regs[RTC_REGS+114]; /* these are the registers */
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int64_t mask,
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irq,
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addr;
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wchar_t *fname;
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int64_t upd_stat,
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upd_ecount,
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onesec_time,
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onesec_cnt,
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rtctime,
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oldmachine;
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/* Hooks to internal RTC I/O functions. */
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void (*set)(struct _nvr_ *, uint16_t, uint8_t);
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uint8_t (*get)(struct _nvr_ *, uint16_t);
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/* Hooks to alternative load/save functions. */
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int8_t (*load)(wchar_t *fname);
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int8_t (*save)(wchar_t *fname);
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/* Hook to RTC ticker handler. */
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void (*hook)(struct _nvr_ *);
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} nvr_t;
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extern int enable_sync;
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extern int nvr_dosave;
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extern void nvr_init(nvr_t *);
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extern int nvr_load(void);
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extern int nvr_save(void);
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extern void nvr_recalc(void);
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extern wchar_t *nvr_path(wchar_t *str);
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extern FILE *nvr_fopen(wchar_t *str, wchar_t *mode);
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extern void nvr_at_init(int64_t irq);
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extern void nvr_at_close(void);
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#endif /*EMU_NVR_H*/
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