220 lines
7.4 KiB
C
220 lines
7.4 KiB
C
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;/*
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;***************************************************************************;
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;* Microsoft MS-DOS CDROM Extensions *;
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;* Copyright (C) Microsoft Corporation, 1992 - 1999*;
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;***************************************************************************;
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;* :ts=4 ; tab-size=4 *;
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;**
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;* DEVSYM.H
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;*
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;* DESCRIPTION:
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;*
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;* HISTORY:
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;*
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;**
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;------------------------------ INCLUDES -----------------------------------;
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include redir\devsym.inc
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;---------------------------------------------------------------------------;
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SYSDEV2 STRUC
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SDEVREC DB size SYSDEV dup (?)
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SDEVRSVD DW ?
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SDEVLET DB ?
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SDEVUNITS DB ?
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SYSDEV2 ENDS
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DEVRDL = 128 ; Read long
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DEVRDLNB = 129 ; Read long non blocking
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DEVRDLPRE = 130 ; Read long prefetch
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DEVSEEK = 131 ; Seek long
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DEVPLAY = 132 ; Device Play
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DEVSTOP = 133 ; Stop device play
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DEVWRTL = 134 ; Write long
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DEVWRTLNB = 135 ; Write long nonblocking
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DEVWRTLV = 136 ; Write long verify
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;*/
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/* Device table and SRH definition */
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/* The device table list has the form: */
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typedef struct SYSDEV {
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struct SYSDEV far *sdevnext; /* Pointer to next dev header */
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unsigned short sdevatt; /* Attributes of the device */
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void (*sdevstrat)(); /* Strategy entry point */
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void (*sdevint)(); /* Interrupt entry point */
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unsigned char sdevname[8]; /* Name of device (only first byte used for block) */
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unsigned short sdevrsvd; /* Reserved word */
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unsigned char sdevlet; /* Drive letter of first unit */
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unsigned char sdevunits; /* Number of units handled */
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} SYSDEV;
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/*
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** Attribute bit masks
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**
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** Character devices:
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**
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** Bit 15 -> must be 1
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** 14 -> 1 if the device understands IOCTL control strings
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** 13 -> 1 if the device supports output-until-busy
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** 12 -> unused
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** 11 -> 1 if the device understands Open/Close
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** 10 -> must be 0
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** 9 -> must be 0
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** 8 -> unused
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** 7 -> unused
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** 6 -> unused
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** 5 -> unused
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** 4 -> 1 if device is recipient of INT 29h
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** 3 -> 1 if device is clock device
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** 2 -> 1 if device is null device
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** 1 -> 1 if device is console output
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** 0 -> 1 if device is console input
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**
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** Block devices:
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**
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** Bit 15 -> must be 0
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** 14 -> 1 if the device understands IOCTL control strings
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** 13 -> 1 if the device determines media by examining the FAT ID byte.
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** This requires the first sector of the fat to *always* reside in
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** the same place.
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** 12 -> unused
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** 11 -> 1 if the device understands Open/Close/removable media
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** 10 -> must be 0
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** 9 -> must be 0
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** 8 -> unused
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** 7 -> unused
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** 6 -> if device has support for GetMap/SetMap of Logical Drives.
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** if the device understands Generic IOCTL function calls.
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** 5 -> unused
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** 4 -> unused
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** 3 -> unused
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** 2 -> unused
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** 1 -> unused
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** 0 -> unused
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*/
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#define DevTyp 0x8000 /* Bit 15 - 1 if Char, 0 if block */
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#define CharDev 0x8000
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#define DevIOCtl 0x4000 /* Bit 14 - CONTROL mode bit */
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#define ISFATBYDEV 0x2000 /* Bit 13 - Device uses FAT ID bytes, */
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/* comp media. */
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#define OutTilBusy 0x2000 /* Output until busy is enabled */
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#define ISNET 0x1000 /* Bit 12 - 1 if a NET device, 0 if */
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/* not. Currently block only. */
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#define DEVOPCL 0x0800 /* Bit 11 - 1 if this device has */
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/* OPEN,CLOSE and REMOVABLE MEDIA */
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/* entry points, 0 if not */
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#define EXTENTBIT 0x0400 /* Bit 10 - Currently 0 on all devs */
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/* This bit is reserved for future use */
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/* to extend the device header beyond */
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/* its current form. */
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/* NOTE Bit 9 is currently used on IBM systems to indicate "drive is shared".
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** See IOCTL function 9. THIS USE IS NOT DOCUMENTED, it is used by some
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** of the utilities which are supposed to FAIL on shared drives on server
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** machines (FORMAT,CHKDSK,RECOVER,..).
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*/
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#define DEV320 0x0040 /* Bit 6 - For block devices, this */
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/* device supports Set/Get Map of */
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/* logical drives, and supports */
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/* Generic IOCTL calls. */
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/* For character devices, this */
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/* device supports Generic IOCTL. */
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/* This is a DOS 3.2 device driver. */
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#define ISSPEC 0x0010 /* Bit 4 - This device is special */
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#define ISCLOCK 0x0008 /* Bit 3 - This device is the clock device. */
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#define ISNULL 0x0004 /* Bit 2 - This device is the null device. */
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#define ISCOUT 0x0002 /* Bit 1 - This device is the console output. */
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#define ISCIN 0x0001 /* Bit 0 - This device is the console input. */
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/* Static Request Header */
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typedef struct SRHEAD {
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unsigned char REQLEN; /* Length in bytes of request block */
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unsigned char REQUNIT; /* Device unit number */
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unsigned char REQFUNC; /* Type of request */
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unsigned short REQSTAT; /* Status Word */
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unsigned char REQQLNK[8]; /* Reserved for queue links */
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} SRHEAD;
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/* Status word masks */
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#define STERR 0x8000 /* Bit 15 - Error */
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#define STBUI 0x0200 /* Bit 9 - Busy */
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#define STDON 0x0100 /* Bit 8 - Done */
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#define STECODE 0x00FF /* Error code */
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/* Function codes */
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#define DEVINIT 0 /* Initialization */
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#define DINITHL 26 /* Size of init header */
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#define DEVMDCH 1 /* Media check */
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#define DMEDHL 15 /* Size of media check header */
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#define DEVBPB 2 /* Get BPB */
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#define DEVRDIOCTL 3 /* IOCTL read */
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#define DBPBHL 22 /* Size of Get BPB header */
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#define DEVRD 4 /* Read */
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#define DRDWRHL 22 /* Size of RD/WR header */
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#define DEVRDND 5 /* Non destructive read no wait (char devs) */
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#define DRDNDHL 14 /* Size of non destructive read header */
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#define DEVIST 6 /* Input status */
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#define DSTATHL 13 /* Size of status header */
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#define DEVIFL 7 /* Input flush */
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#define DFLSHL 15 /* Size of flush header */
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#define DEVWRT 8 /* Write */
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#define DEVWRTV 9 /* Write with verify */
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#define DEVOST 10 /* Output status */
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#define DEVOFL 11 /* Output flush */
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#define DEVWRIOCTL 12 /* IOCTL write */
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#define DEVOPN 13 /* Device open */
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#define DEVCLS 14 /* Device close */
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#define DOPCLHL 13 /* Size of OPEN/CLOSE header */
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#define DEVRMD 15 /* Removable media */
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#define REMHL 13 /* Size of Removable media header */
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#define GENIOCTL 19
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/* The next three are used in DOS 4.0
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** 20
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** 21
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** 22
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*/
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#define DEVGETOWN 23 /* Get Device Owner */
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#define DEVSETOWN 24 /* Set Device Owner */
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#define OWNHL 13 /* Size of Device Owner header */
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#define DevOUT 16 /* output until busy. */
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#define DevOutL DevWrt /* length of output until busy */
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#define DEVRDL 128 /* Read long */
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#define DEVRDLNB 129 /* Read long non blocking */
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#define DEVRDLPRE 130 /* Read long prefetch */
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#define DEVSEEK 131 /* Seek long */
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#define DEVPLAY 132 /* Device Play */
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#define DEVSTOP 133 /* Stop device play */
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#define DEVWRTL 134 /* Write long */
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#define DEVWRTLNB 135 /* Write long nonblocking */
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#define DEVWRTLV 136 /* Write long verify */
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/* Generic IOCTL Request structure
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** See the DOS 4.0 Device Driver Spec for Further elaboration.
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*/
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typedef struct IOCTL_Req {
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struct SRHEAD ReqHdr;
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/* Generic IOCTL addition. */
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unsigned char MajorFunction; /* Function Code */
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unsigned char MinorFunction; /* Function Category */
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unsigned short Reg_SI;
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unsigned short Reg_DI;
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unsigned char far *GenericIOCTL_Packet; /* Pointer to Data Buffer */
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} IOCTL_Req;
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/* Definitions for IOCTL_Req.MinorFunction */
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#define GEN_IOCTL_WRT_TRK 0x40
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#define GEN_IOCTL_RD_TRK 0x60
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#define GEN_IOCTL_FN_TST 0x20 /* Used to diff. bet reads and wrts */
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\
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