config.equ

一个dos操作系统DRDOS的源码

;    File              : $CONFIG.EQU$
;
;    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,
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;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
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;    CIVIL LIABILITY.
;-----------------------------------------------------------------------;
;
;    *** Current Edit History ***
;    *** End of Current Edit History ***
;
;    $Log$
;
;    ENDLOG


DOS5		equ	0FFFFh

if DOS5
MOVE_DOWN	equ	1800h		; start relocated code 96K down
else
MOVE_DOWN	equ	2500h		; start relocated code 148K down
endif

NUM_BUFFS	equ	4
SIZEOF_BUFFS	equ	1024+32		; allow for large sectors during init

CONFIG_BUF	equ	ds:byte ptr .0
CONFIG_BUF_SIZE	equ	 8*1024		; CONFIG.SYS read in this size chunks
INIT_BUFFERS	equ	CONFIG_BUF+CONFIG_BUF_SIZE
if DOS5
INIT_BUFFERS_SIZE equ	NUM_BUFFS*SIZEOF_BUFFS
					; reserve space for init disk buffers
TEMP_LDT	equ	INIT_BUFFERS+INIT_BUFFERS_SIZE
					; space for temp LDT's at CONFIG time
TEMP_LDT_SIZE	equ	 ((26*58h)/16)*16+20h
else
INIT_BUFFERS_SIZE equ	NUM_BUFFS*(512+16)	; reserve space for init disk buffers
TEMP_LDT	equ	INIT_BUFFERS+INIT_BUFFERS_SIZE
					; space for temp LDT's at CONFIG time
TEMP_LDT_SIZE	equ	 ((26*51h)/16)*16+20h
endif
DYNAMIC_DATA_END equ	TEMP_LDT+TEMP_LDT_SIZE

BLKDEV_LENGTH	equ	9		; # of bytes per block device init entry
	
MAX_PATHLEN	equ	65		; Maximum Path Length
MAX_FILELEN	equ	80		; Maximum File Length
EOF		equ	01ah		; End of File Marker

MIN_NUM_BUFFS	equ	3		; minimum # of disk buffers required
MAX_NUM_BUFFS	equ	99		; maximum # of disk buffers supported
DEF_NUM_BUFFS	equ	1		; 1 during config to so most go hi

MIN_READ_AHEAD	equ	1		; minimum read-ahead
MAX_READ_AHEAD	equ	99		; maximum read-ahead
DEF_READ_AHEAD	equ	0		; default no read-ahead
;
;	DEF_NUM_FILES must be less than MIN_NUM_FILES in order to
;	force two file structure allocations Windows will FAIL if this 
;	is not TRUE.
;
MIN_NUM_FILES	equ	8		; minimum # of files required
MAX_NUM_FILES	equ	255		; maximum # of files supported
DEF_NUM_FILES	equ	1		; default # of files (+4 FCBS)

MIN_NUM_FCBS	equ	0		; minimum # of fcbs required
MAX_NUM_FCBS	equ	255		; maximum # of fcbs supported
DEF_NUM_FCBS	equ	4		; default # of fcb handles

MIN_NUM_FOPEN	equ	0		; minimum # of hashed files required
MAX_NUM_FOPEN	equ	32768		; maximum # of hashed files supported
DEF_NUM_FOPEN	equ	4096		; default # of files on normal system

MIN_NUM_STACKS	equ	8		; on hardware interrupts swap stacks
MAX_NUM_STACKS	equ	64		;  to a dynamically allocated one
DEF_NUM_STACKS	equ	0		; zero is a special case - no swapping

MIN_SIZE_STACK	equ	32		; the dynamic stacks are this size
MAX_SIZE_STACK	equ	512
DEF_SIZE_STACK	equ	128		; default size

CFG_BUF_LEN	equ	256		; Length of CONFIG.SYS line buffer

DEF_COUNTRY	equ	1		; USA
DEF_CODEPAGE	equ	0		; No codepage

DELWATCH	equ	0FFFFh

RLF_ENHANCED	equ	0000$0001b	; Enhanced features are on
RLF_INS		equ	0000$0010b	; Insert Flag
RLF_SEARCH	equ	0000$0100b 	; Search mode on
RLF_MATCH	equ	0000$1000b	; We are matching a command

BUFFERS_IN_HMA	equ	0000$0001b
BUFFERS_IN_UMB	equ	0000$0010b

DMD_ID          equ     es:byte ptr .0	; id code ('M' or 'Z')
DMD_PSP         equ     es:word ptr .1	; owner of memory block
DMD_LEN         equ     es:word ptr .3	; length of memory block
DMD_NAME	equ	es:byte ptr .8	; ASCIIZ name field
DMD_NAME_LEN	equ	8		;  8 Bytes long
IDM             equ     'M'		; not last id code
IDZ             equ     'Z'		; last id code