MZ is back!HEADmain

1 files changed, 56 insertions, 0 deletions

diff --git a/v4.0/src/DEV/SMARTDRV/DIRENT.ASM b/v4.0/src/DEV/SMARTDRV/DIRENT.ASM
new file mode 100644
index 0000000..e7150c8
--- /dev/null
+++ b/v4.0/src/DEV/SMARTDRV/DIRENT.ASM
@@ -0,0 +1,56 @@
+Break <Directory entry>
+
+;
+;       +---------------------------+
+;       |  (12 BYTE) filename/ext   |       0       0
+;       +---------------------------+
+;       |     (BYTE) attributes     |       11      B
+;       +---------------------------+
+;       |    (10 BYTE) reserved     |       12      C
+;       +---------------------------+
+;       | (WORD) time of last write |       22      16
+;       +---------------------------+
+;       | (WORD) date of last write |       24      18
+;       +---------------------------+
+;       |   (WORD) First cluster    |       26      1A
+;       +---------------------------+
+;       |     (DWORD) file size     |       28      1C
+;       +---------------------------+
+;
+;   First byte of filename  = E5 -> free directory entry
+;                           = 00 -> end of allocated directory
+;   Time:   Bits 0-4=seconds/2, bits 5-10=minute, 11-15=hour
+;   Date:   Bits 0-4=day, bits 5-8=month, bits 9-15=year-1980
+;
+
+dir_entry   STRUC
+dir_name    DB      11 DUP (?)          ; file name
+dir_attr    DB      ?                   ; attribute bits
+dir_pad     DB      10 DUP (?)          ; reserved for expansion
+dir_time    DW      ?                   ; time of last write
+dir_date    DW      ?                   ; date of last write
+dir_first   DW      ?                   ; first allocation unit of file
+dir_size_l  DW      ?                   ; low 16 bits of file size
+dir_size_h  DW      ?                   ; high 16 bits of file size
+dir_entry   ENDS
+
+attr_read_only      EQU      1h
+attr_hidden         EQU      2h
+attr_system         EQU      4h
+attr_volume_id      EQU      8h
+attr_directory      EQU     10h
+attr_archive        EQU     20h
+attr_device         EQU     40h         ; This is a VERY special bit.
+                                        ;   NO directory entry on a disk EVER
+                                        ;   has this bit set. It is set non-zero
+                                        ;   when a device is found by GETPATH
+
+attr_all            EQU     attr_hidden+attr_system+attr_directory
+                                        ; OR of hard attributes for FINDENTRY
+
+attr_ignore         EQU     attr_read_only+attr_archive+attr_device
+                                        ; ignore this(ese) attribute(s) during
+                                        ; search first/next
+
+attr_changeable     EQU     attr_read_only+attr_hidden+attr_system+attr_archive
+                                        ; changeable via CHMOD