MZ is back!HEADmain

1 files changed, 35 insertions, 0 deletions

diff --git a/v4.0/src/INC/DPB.INC b/v4.0/src/INC/DPB.INC
new file mode 100644
index 0000000..651f5d0
--- /dev/null
+++ b/v4.0/src/INC/DPB.INC
@@ -0,0 +1,35 @@
+;       SCCSID = @(#)dpb.asm    1.1 85/04/10
+;       SCCSID = @(#)dpb.asm    1.1 85/04/10
+BREAK <DPB structure>
+;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
+;            C  A  V  E  A  T     P  R  O  G  R  A  M  M  E  R             ;
+;                                                                          ;
+dpb     STRUC
+dpb_drive           DB      ?           ; Logical drive # assoc with DPB (A=0,B=1,...)
+dpb_UNIT            DB      ?           ; Driver unit number of DPB
+dpb_sector_size     DW      ?           ; Size of physical sector in bytes
+dpb_cluster_mask    DB      ?           ; Sectors/cluster - 1
+dpb_cluster_shift   DB      ?           ; Log2 of sectors/cluster
+dpb_first_FAT       DW      ?           ; Starting record of FATs
+dpb_FAT_count       DB      ?           ; Number of FATs for this drive
+dpb_root_entries    DW      ?           ; Number of directory entries
+dpb_first_sector    DW      ?           ; First sector of first cluster
+dpb_max_cluster     DW      ?           ; Number of clusters on drive + 1
+dpb_FAT_size        DW      ?           ;;Number of records occupied by FAT
+dpb_dir_sector      DW      ?           ; Starting record of directory
+dpb_driver_addr     DD      ?           ; Pointer to driver
+dpb_media           DB      ?           ; Media byte
+dpb_first_access    DB      ?           ; This is initialized to -1 to force a media
+                                        ; check the first time this DPB is used
+dpb_next_dpb        DD      ?           ; Pointer to next Drive parameter block
+dpb_next_free       DW      ?           ; Cluster # of last allocated cluster
+dpb_free_cnt        DW      ?           ; Count of free clusters, -1 if unknown
+dpb     ENDS
+
+DPBSIZ  EQU     SIZE dpb                ; Size of the structure in bytes
+
+DSKSIZ  =       dpb_max_cluster         ; Size of disk (temp used during init only)
+;                                                                          ;
+;            C  A  V  E  A  T     P  R  O  G  R  A  M  M  E  R             ;
+;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
+
\ No newline at end of file