77 lines
2.2 KiB
PHP
77 lines
2.2 KiB
PHP
BREAK <Disk I/O Buffer Header>
|
|
|
|
|
|
;** BUFFER.INC
|
|
;
|
|
; Field definition for I/O buffer information
|
|
|
|
BUFFINFO STRUC
|
|
buf_next DW ? ; Pointer to next buffer in list
|
|
buf_prev DW ? ; Pointer to prev buffer in list
|
|
buf_ID DB ? ; Drive of buffer (bit 7 = 0)
|
|
; SFT table index (bit 7 = 1)
|
|
; = FFH if buffer free
|
|
buf_flags DB ? ; Bit 7 = 1 if Remote file buffer
|
|
; = 0 if Local device buffer
|
|
; Bit 6 = 1 if buffer dirty
|
|
; Bit 5 = Reserved
|
|
; Bit 4 = Search bit (bit 7 = 1)
|
|
; Bit 3 = 1 if buffer is DATA
|
|
; Bit 2 = 1 if buffer is DIR
|
|
; Bit 1 = 1 if buffer is FAT
|
|
; Bit 0 = Reserved
|
|
buf_sector DD ? ; Sector number of buffer (bit 7 = 0)
|
|
; The next two items are often refed as a word (bit 7 = 0)
|
|
buf_wrtcnt DB ? ; For FAT sectors, # times sector written out
|
|
buf_wrtcntinc DW ? ; " " " , # sectors between each write
|
|
buf_DPB DD ? ; Pointer to drive parameters
|
|
buf_fill DW ? ; How full buffer is (bit 7 = 1)
|
|
buf_reserved DB ? ; make DWORD boundary for 386
|
|
BUFFINFO ENDS
|
|
|
|
buf_offset EQU DWORD PTR buf_sector
|
|
;For bit 7 = 1, this is the byte
|
|
;offset of the start of the buffer in
|
|
;the file pointed to by buf_ID. Thus
|
|
;the buffer starts at location
|
|
;buf_offset in the file and contains
|
|
;buf_fill bytes.
|
|
|
|
BUFINSIZ EQU SIZE BUFFINFO
|
|
; Size of structure in bytes
|
|
|
|
buf_Free EQU 0FFh ; buf_id of free buffer
|
|
|
|
;Flag byte masks
|
|
buf_isnet EQU 10000000B
|
|
buf_dirty EQU 01000000B
|
|
;***
|
|
buf_visit EQU 00100000B
|
|
;***
|
|
buf_snbuf EQU 00010000B
|
|
|
|
buf_isDATA EQU 00001000B
|
|
buf_isDIR EQU 00000100B
|
|
buf_isFAT EQU 00000010B
|
|
buf_type_0 EQU 11110001B ; AND sets type to "none"
|
|
|
|
buf_NetID EQU BUFINSIZ
|
|
|
|
;
|
|
; Buffer Hash Entry Structure
|
|
;
|
|
;BUFFER_HASH_ENTRY STRUC ; DOS 4.00
|
|
;EMS_PAGE_NUM DW -1 ; logical page number for EMS handle
|
|
;BUFFER_BUCKET DD ? ; pointer to buffers
|
|
;DIRTY_COUNT DB 0 ; number of dirty buffers
|
|
;BUFFER_RESERVED DB 0 ; reserved
|
|
;BUFFER_HASH_ENTRY ENDS
|
|
;
|
|
;MaxBuffinBucket EQU 15 ; Max number of buffers per bucket
|
|
;MaxBucketinPage EQU 2 ; Max number of buckets per 16kb page
|
|
;
|
|
;
|
|
; ;
|
|
; C A V E A T P R O G R A M M E R ;
|
|
;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
|