1 files changed, 77 insertions, 0 deletions

diff --git a/v4.0/src/INC/BUFFER.INC b/v4.0/src/INC/BUFFER.INC
new file mode 100644
index 0000000..bd64882
--- /dev/null
+++ b/v4.0/src/INC/BUFFER.INC
@@ -0,0 +1,77 @@
+;       SCCSID = @(#)buffer.asm 1.1 85/04/09
+BREAK <Disk I/O Buffer Header>
+;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
+;            C  A  V  E  A  T     P  R  O  G  R  A  M  M  E  R             ;
+;                                                                          ;
+
+; 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             ;
+;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;