📄 viewcmos.c
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#include <stdio.h>
#include <dos.h>
typedef struct
{ char seconds; /* AT Real Time Clock (RTC): Seconds */
char secalrm; /* AT RTC: Seconds Alarm */
char minutes; /* AT RTC: Minutes */
char minalrm; /* AT RTC: Minutes Alarm */
char hours; /* AT RTC: Hours */
char hrsalrm; /* AT RTC: Hours Alarm */
char dayofweek; /* AT RTC: day of week */
char dayofmon; /* AT RTC: day of month */
char month; /* AT RTC: month */
char year; /* AT RTC: year */
char aregister; /* STATUS REGISTER A */
char bregister; /* STATUS REGISTER B */
char cregister; /* STATUS REGISTER C */
char dregister; /* STATUS REGISTER D */
char diagnostic; /* Diagnostics status byte */
char shutdown; /* Shutdown status byte */
char diskettes; /* A & B diskette types */
char reserved1; /* undefined */
char harddrive; /* C & D hard drive types */
char reserved2; /* undefined */
char equipment; /* equipment byte */
char lowbyte; /* low byte of base memory */
char highbyte; /* high byte of base memory */
/* 100h = 256k, 200h = 512k, 280h = 640k */
char extlow; /* low byte of extended memory */
char exthigh; /* high byte of extended memory */
/* 200h=512k;400h=1024k;etc to 3c00h=15360k */
char drivec; /* more data on drive c */
char drived; /* more data on drive d */
char reserved[19]; /* reserved */
unsigned checksum;
char extlow1; /* same as extlow */
char exthigh1; /* same as exthigh */
char century; /* binary coded decimal value for century */
/* 19h = 1900 for example */
char infoflag; /* bit 7 set = top 128k installed */
char info[12];
} CMOS, *CMOSPTR;
/* -------------------------------------------------------------------------
AT REAL TIME CLOCK STATUS REGISTER A
===========================================================================
7 6 5 4 3 2 1 0 FUNCTION ALLOWABLE VALUES
---------------------------------------------------------------------------
X UPDATE IN PROGRESS 1=DATE/TIME BEING UPDATED 0=NOT
X X X 22 STAGE DIVIDER DEFAULT=010, 32.768 KHZ TIME BASE
X X X X RATE SELECTION DEFAULT=0110, 1.024 KHZ FREQUENCY
===========================================================================
AT REAL TIME CLOCK STATUS REGISTERS B
===========================================================================
7 6 5 4 3 2 1 0 NAME ALLOWABLE VALUES
--------------------------------------------------------------------------
X SET, 1 PER SECOND 0=UPDATE NORMALLY, 1=ABORT UPDATE
X PERIODIC INT ENABLE 0=DISABLE INT (DEFAULT), 1=ENABLED
X ALARM INT ENABLE 0=DISABLED (DEFAULT), 1=ENABLED
X UPDATE END INT ENA. 0=DISABLED (DEFAULT), 1=ENABLED
X SQUARE WAVE ENABLE 0=DIS (DEF), 1=ENA, PER REG A 0-3
X DATE MODE 0=BCD (DEFAULT), 1=BINARY
X 24/12 MODE 0=12 HOUR, 1=24 HOUR FORMAT (DEFAULT)
X DAYLIGHT SAVING ENA 0=DISABLED (DEFAULT), 1=ENABLED
===========================================================================
AT REAL TIME CLOCK STATUS REGISTER C
===========================================================================
7 6 5 4 3 2 1 0 NAME ALLOWABLE VALUES
-------------------------------------------------------------------------
X IRQF FLAG READ ONLY
X PF FLAG READ ONLY
X AF FLAG READ ONLY
X UF FLAG READ ONLY
X X X X RESERVED SHOULD ALWAYS BE ZERO
===========================================================================
AT CMOS STATUS REGISTER D
===========================================================================
7 6 5 4 3 2 1 0 NAME ALLOWABLE VALUES
--------------------------------------------------------------------------
X VALID RAM BIT 0=BATT DEAD,RAM INVALID, 1=BATT GOOD
X X X X X X X RESERVED SHOULD ALWAYS BE ZERO
===========================================================================
AT CMOS DIAGNOSTICS BYTE
===========================================================================
7 6 5 4 3 2 1 0 NAME ALLOWABLE VALUES
------------------------------------------------------------------------
X POWER STAT OF RTC 1=CHIP HAS LOST POWER, 0=NOT
X CHECKSUM STATUS 0=CHECKSUM OK, 1=NOT OK
X CONFIGURATION INFO 0=VALID INFO, 1=NOT VALID
X MEMORY SIZE COMPARE 0=SAME SIZE, 1=NOT SAME SIZE
X FIXED DISK STATUS 0=OK, 1=DRIVE OR ADAPTER FAILED
X TIME STATUS 0=TIME IS OK, 1=TIME NOT OK
X X RESERVED
===========================================================================
AT CMOS DRIVE TYPE BYTE
===========================================================================
7 6 5 4 3 2 1 0 FUNCTION ALLOWABLE VALUES
-------------------------------------------------------------------------
X X X X TYPE OF FIRST DRIVE 0000=NO DRIVE, 0001=360K 5.25"
0010=1.2M 5.25" 0011=720K 3.5"
0100=1.44M 3.5"
X X X X TYPE OF SECOND DRIVE
===========================================================================
AT CMOS FIXED DRIVE TYPES
===========================================================================
7 6 5 4 3 2 1 0 NAME ALLOWABLE VALUES
----------------------------------------------------------------------------
X X X X FIXED DISK C TYPE 0000=NO DRIVE 1H TO 0EH SEE CHART
X X X X FIXED DISK D TYPE 0000=NO DRIVE 1H TO 0EH SEE CHART
IF BYTE= 0FH THEN SEE EXTENDED BYTE FOR DRIVE TYPE
===========================================================================
AT CMOS EQUIPMENT BYTE
===========================================================================
7 6 5 4 3 2 1 0 NAME ALLOWABLE VALUES
-----------------------------------------------------------------------------
X X NUMBER OF DISK DRIVES 00=1,01=2,10=3,11=4
X X PRIMARY DISPLAY TYPE 00=DISPLAY HAS BIOS or EGA,
01=40 COL CGA,
10=80 COL CGA,
11=MDA,
101=EGA
X X NOT USED
X MATH COPROCESSOR 0=NOT INSTALLED, 1=INSTALLED
X DISK DRIVES AVAILABLE 0=NO DRIVES, 1=DISK DRIVES AVAILABLE
===========================================================================
AT CMOS DRIVE C AND D EXTENDED DRIVE TYPE BYTES
===========================================================================
7 6 5 4 3 2 1 0 NAME ALLOWABLE VALUES
-----------------------------------------------------------------------------
X X X X X X X X DRIVE C TYPE BYTE SEE NEXT CHART FOR TYPES
X X X X X X X X DRIVE D TYPE BYTE SEE NEXT CHART FOR TYPES
IF FIXED DRIVE 4 BITS FOR C IS 0-0EH IGNOR EXTENDED C
IF FIXED DRIVE 4 BITS FOR D IS 0-0EH IGNOR EXTENDED D
AT HARD DISK TYPES
+--------------------------------------------------------+
| | | | | | | |
| DISK | CYLINDER | TOTAL | PRE- | LAND | SECTORS | SIZE |
| TYPE | COUNT | HEADS | COMP | ZONE | PER/TRK | MB |
|------+----------+-------+------+------+---------+------|
| 1 | 306 | 4 | 128 | 305 | 17 | 10.1 |
|------+----------+-------+------+------+---------+------|
| 2 | 615 | 4 | 300 | 615 | 17 | 20.4 |
|------+----------+-------+------+------+---------+------|
| 3 | 615 | 6 | 300 | 615 | 17 | 30.6 |
|------+----------+-------+------+------+---------+------|
| 4 | 940 | 8 | 512 | 940 | 17 | 62.4 |
|------+----------+-------+------+------+---------+------|
| 5 | 940 | 6 | 512 | 940 | 17 | 46.8 |
|------+----------+-------+------+------+---------+------|
| 6 | 615 | 4 | NONE | 615 | 17 | 20.4 |
|------+----------+-------+------+------+---------+------|
| 7 | 462 | 8 | 256 | 511 | 17 | 30.6 |
|------+----------+-------+------+------+---------+------|
| 8 | 733 | 5 | NONE | 733 | 17 | 30.4 |
|------+----------+-------+------+------+---------+------|
| 9 | 900 | 15 | NONE | 901 | 17 |112.0 |
|------+----------+-------+------+------+---------+------|
| 10 | 820 | 3 | NONE | 820 | 17 | 20.4 |
|------+----------+-------+------+------+---------+------|
| 11 | 855 | 5 | NONE | 855 | 17 | 35.4 |
|------+----------+-------+------+------+---------+------|
| 12 | 855 | 7 | NONE | 855 | 17 | 49.6 |
|------+----------+-------+------+------+---------+------|
| 13 | 306 | 8 | 128 | 319 | 17 | 20.3 |
|------+----------+-------+------+------+---------+------|
| 14 | 733 | 7 | NONE | 733 | 17 | 42.5 |
|------+----------+-------+------+------+---------+------|
| 16 | 612 | 4 | 0 | 663 | 17 | 20.5 |
|------+----------+-------+------+------+---------+------|
| 17 | 977 | 5 | 300 | 977 | 17 | 40.5 |
|------+----------+-------+------+------+---------+------|
| 18 | 977 | 7 | NONE | 977 | 17 | 56.7 |
|------+----------+-------+------+------+---------+------|
| 19 | 1024 | 7 | 512 | 1023 | 17 | 59.5 |
|------+----------+-------+------+------+---------+------|
| 20 | 733 | 5 | 300 | 732 | 17 | 30.4 |
|------+----------+-------+------+------+---------+------|
| 21 | 733 | 7 | 300 | 732 | 17 | 42.5 |
|------+----------+-------+------+------+---------+------|
| 22 | 733 | 5 | 300 | 733 | 17 | 30.4 |
|------+----------+-------+------+------+---------+------|
| 23 | 306 | 4 | 0 | 336 | 17 | 10.1 |
|------+----------+-------+------+------+---------+------|
| 25 | 615 | 4 | 0 | 615 | 17 | 20.4 |
|------+----------+-------+------+------+---------+------|
| 26 | 1024 | 4 | NONE | 1023 | 17 | 34.0 |
|------+----------+-------+------+------+---------+------|
| 27 | 1024 | 5 | NONE | 1023 | 17 | 42.5 |
|------+----------+-------+------+------+---------+------|
| 28 | 1024 | 8 | NONE | 1023 | 17 | 68.0 |
|------+----------+-------+------+------+---------+------|
| 29 | 512 | 8 | 256 | 512 | 17 | 34.0 |
|------+----------+-------+------+------+---------+------|
| 30 | 615 | 2 | 615 | 615 | 17 | 10.2 |
|------+----------+-------+------+------+---------+------|
| 31 | 989 | 5 | 0 | 989 | 17 | 41.0 |
|------+----------+-------+------+------+---------+------|
| 32 | 1020 | 15 | NONE | 1024 | 17 |127.0 |
|------+----------+-------+------+------+---------+------|
| 35 | 1024 | 9 | 1024 | 1024 | 17 | 76.5 |
|------+----------+-------+------+------+---------+------|
| 36 | 1024 | 5 | 512 | 1024 | 17 | 42.5 |
|------+----------+-------+------+------+---------+------|
| 37 | 830 | 10 | NONE | 830 | 17 | 68.8 |
|------+----------+-------+------+------+---------+------|
| 38 | 823 | 10 | 256 | 824 | 17 | 68.3 |
|------+----------+-------+------+------+---------+------|
| 39 | 615 | 4 | 128 | 664 | 17 | 20.4 |
|------+----------+-------+------+------+---------+------|
| 40 | 615 | 8 | 128 | 664 | 17 | 40.8 |
|------+----------+-------+------+------+---------+------|
| 41 | 917 | 15 | NONE | 918 | 17 |114.1 |
|------+----------+-------+------+------+---------+------|
| 42 | 1023 | 15 | NONE | 1024 | 17 |127.3 |
|------+----------+-------+------+------+---------+------|
| 43 | 823 | 10 | 512 | 823 | 17 | 68.3 |
|------+----------+-------+------+------+---------+------|
| 44 | 820 | 6 | NONE | 820 | 17 | 40.8 |
|------+----------+-------+------+------+---------+------|
| 45 | 1024 | 8 | NONE | 1024 | 17 | 68.0 |
|------+----------+-------+------+------+---------+------|
| 46 | 925 | 9 | NONE | 925 | 17 | 69.1 |
|------+----------+-------+------+------+---------+------|
| 47 | 699 | 7 | 256 | 700 | 17 | 40.6 |
+--------------------------------------------------------+
--------------------------------------------------------------------- */
#define CMOS_ADDR 0x70 /* address port of CMOS */
#define CMOS_DATA 0x71 /* data port for CMOS */
void GetCMOS(char *cmosdata) /* read CMOS data (64 bytes) */
{
unsigned char j, byte;
for (j=0; j<64; j++)
{ disable(); /* disable interrupts */
outportb(CMOS_ADDR,j); /* specify byte to get */
byte= inportb(CMOS_DATA); /* get data */
enable(); /* enable interrupts */
*cmosdata++ = byte; /* save CMOS data */
}
}
void ReadCMOS(void)
{
static char *floppy[] = { "None",
"360K 5.25-inch",
"1.2M 5.25-inch",
"720K 3.5-inch",
"1.44M 3.5-inch"
};
static char *display[] = { "EGA", /* 00 */
"40 column CGA", /* 01 */
"80 column CGA", /* 10 */
"MDA", /* 11 */
};
static char *math[] = { "Not Installed",
"Installed"
};
static char *diag[] = { "Time","Hard Dr","Memory","CnfInfo","Chksum","PwrOK"};
static char *status[] = { "OK","Not OK" };
static char *hardtbl[] = {
"谀哪哪穆哪哪哪哪哪履哪哪哪履哪哪穆哪哪哪履哪哪哪哪履哪哪目",
"矰rive ⌨️ 快捷键说明
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