与MS-DOS兼容的DOS操作系统
源代码在线查看： request.equ
; File : $REQUEST.EQU$
;
; Description :
;
; Original Author : DIGITAL RESEARCH
;
; Last Edited By : $CALDERA$
;
;-----------------------------------------------------------------------;
; Copyright Work of Caldera, Inc. All Rights Reserved.
;
; THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
; PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
; ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
; WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
; THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
; HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
; AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
; AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
; COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
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; CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
; AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
; CIVIL LIABILITY.
;-----------------------------------------------------------------------;
;
; *** Current Edit History ***
; *** End of Current Edit History ***
;
; $Log$
; ENDLOG
P_DSTRUC struc
dw ?
REQUEST dd ?
P_DMA dd ?
P_DSTRUC ends
P_STRUC struc
dw ? ; saved BP
REQUEST_OFF dw ? ; request header offset
REQUEST_SEG dw ? ; request header segment
P_DMAOFF dw ? ; transfer offset
P_DMASEG dw ? ; transfer segment
P_RETRY db ? ; retry count for disk errors
P_DIRECT db ? ; 0 if DMA deblocking required
P_ROSCMD db ? ; 2 = read, 3 = write, 4 = verify
P_SETTLE db ? ; for fast settle on reads
P_SECTOR db ? ; sector # (0..BPB_SPT-1)
P_HEAD db ? ; head # (0..BPB_HEADS-1)
P_CYL dw ? ; cylinder # (0..1023)
P_COUNT dw ? ; requested sector count
P_MCNT dw ? ; physical sector count
P_STRUC ends
CMD_INIT equ 0 ; Initialize the Device Driver
CMD_MEDIA_CHECK equ 1 ; Request Media Check
CMD_BUILD_BPB equ 2 ; Build Drive BPB
CMD_INPUT_IOCTL equ 3 ; IOCTL input
CMD_INPUT equ 4 ; Input
CMD_INPUT_NOWAIT equ 5 ; Non destructive input no wait
CMD_INPUT_STATUS equ 6 ; Input status
CMD_INPUT_FLUSH equ 7 ; Input flush
CMD_OUTPUT equ 8 ; Output
CMD_OUTPUT_VERIFY equ 9 ; Output with verify
CMD_OUTPUT_STATUS equ 10 ; Output status
CMD_OUTPUT_FLUSH equ 11 ; Output flush
CMD_OUTPUT_IOCTL equ 12 ; IOCTL output
CMD_DEVICE_OPEN equ 13 ; Device OPEN
CMD_DEVICE_CLOSE equ 14 ; Device CLOSE
CMD_FIXED_MEDIA equ 15 ; Removeable Media Check
CMD_GENERIC_IOCTL equ 19 ; Generic IOCTL
CMD_GET_DEVICE equ 23 ; Get the Logical Device
CMD_SET_DEVICE equ 24 ; Set the Logical Device
CMD_QUERY_IOCTL equ 25 ; query ioctl support
; Generic Request Header Format
RH_LEN equ byte ptr 0
RH_UNIT equ byte ptr 1
RH_CMD equ byte ptr 2
RH_STATUS equ word ptr 3
RHS_DONE equ 0100h
RHS_BUSY equ 0200h
RHS_IC equ 0400h ; Interim Character
RHS_RM equ 0800h
RHS_ERROR equ 8000h
;******
;* No longer safe to use - some device drivers trample on them....
;*
;* RH_STRATEGY equ dword ptr 5 ; Device Strategy Routine
;* RH_STRATOFF equ word ptr 5 ; Strategy Offset
;* RH_STRATSEG equ word ptr 7 ; Strategy Segment
;* RH_INTERRUPT equ dword ptr 9 ; Device Interrupt Routine
;* RH_INTOFF equ word ptr 9 ; Intterupt Offset
;* RH_INTSEG equ word ptr 11 ; Interrupt Segment
;*****
; Request header for initialization
RH0_NUNITS equ byte ptr 13
RH0_RESIDENT equ word ptr 14
RH0_BPBOFF equ word ptr 18
RH0_BPBSEG equ word ptr 20
RH0_DRIVE equ byte ptr 22
RH0_LEN equ 22
; Request header for media check
RH1_MEDIA equ byte ptr 13 ; BDOS: current media byte
RH1_RETURN equ byte ptr 14 ; driver: return code (00, 01, FF)
RH1_VOLID equ dword ptr 15 ; driver: volume label address
RH1_LEN equ 15
; Request header for "build BPB"
RH2_MEDIA equ byte ptr 13 ; BDOS or driver?
RH2_BUFFER equ dword ptr 14 ; BDOS: scratch buffer for driver use
RH2_BPB equ dword ptr 18 ; same as the following:
RH2_BPBOFF equ word ptr 18 ; driver: address of new BPB
RH2_BPBSEG equ word ptr 20
RH2_LEN equ 24
; Request header for input/output
RH4_MEDIA equ byte ptr 13 ; BDOS: current media byte
RH4_RIC equ byte ptr 13 ; BDOS: Return Interim Char flg
RH4_BUFFER equ dword ptr 14 ; BDOS: disk transfer address
RH4_BUFOFF equ word ptr 14 ; BDOS: Buffer Offset
RH4_BUFSEG equ word ptr 16 ; BDOS: Buffer Segment
RH4_COUNT equ word ptr 18 ; BDOS: sector count
RH4_SECTOR equ word ptr 20 ; BDOS: starting sector
RH4_VOLID equ dword ptr 22 ; driver: volume if illegal disk change
RH4_BIGSECTOR equ dword ptr 26
RH4_BIGSECTORLO equ word ptr 26
RH4_BIGSECTORHI equ word ptr 28
RH4_LEN equ 30
; Request Header for Non-Destructive Input
RH5_CHAR equ byte ptr 13 ; Character Read from Device
RH5_RIC equ byte ptr 13 ; BDOS: Return Interim Char flg
RH5_LEN equ 14
; Request Header for Device Open
RH13_LEN equ 13
; Request Header for Device Close
RH14_LEN equ 13
; Request header for generic IOCTL
RH19_CATEGORY equ word ptr 13 ; BDOS: major/minor function number
RH19_MAJOR equ byte ptr 13 ; BDOS: Major Function Number
RH19_MINOR equ byte ptr 14 ; BDOS: Minor Function Number
RH19_SI equ word ptr 15 ; BDOS: User SI
RH19_DI equ word ptr 17 ; BDOS: User DI
RH19_GENPB equ dword ptr 19 ; BDOS: extra parameters
RH19_LEN equ 23
RQ19_SET equ 40h ; set device parameters
RQ19_GET equ 60h ; get device parameters
RQ19_WRITE equ 41h ; write tracks
RQ19_READ equ 61h ; read tracks
RQ19_FORMAT equ 42h ; format tracks
RQ19_VERIFY equ 62h ; verify tracks
RQ19_SETMEDIA equ 46h ; set media ID
RQ19_GETMEDIA equ 66h ; get media ID
RQ19_PRP_START equ 4Ch ; start of codepage prepare
RQ19_PRP_END equ 4Dh ; end of codepage prepare
RQ19_SELECT equ 4Ah ; select code page
RQ19_QRY_SEL equ 6Ah ; query selected code page
RQ19_QRY_PRP equ 6Bh ; query prepared code page(s)
RQ19_DSP_SET equ 5Fh ; set display information
RQ19_DSP_GET equ 7Fh ; get display information
; Request header for get/set drive
RH24_CMD equ byte ptr 14 ; BDOS: Command Code
RH24_STATUS equ word ptr 15 ; BDOS: Status
RH24_RESVD equ dword ptr 17 ; BDOS: Reserved
RH24_LEN equ 21
RH_SIZE equ 30 ; maximum size of request header
