Table of Contents
Advertisement
Section A:
System interface
Offset
Name
CP/M
Alter
Function
-------
-------
--------------------------------------
57H
EOSFLAG
yes
no
Current
EOS flags.
The flag bits may
be set by function 76.
for an explan-
at ion of the flag bits, refer to chap-
ter A.9.
58H-59H
DATE
yes
no
Current Julian date,
where a value of
1
corresponds to January
1st,
1978.
The
date
and time variables
can
be
read
and set by function 104 and 105,
respectively.
5AH
HOURS
yes
no
Current hour, BCD format.
5BH
MINUTES
yes
no
Current minute, BCD format.
5CH
SECONDS
yes
no
Current second, BCD format.
5DH-61H
no
- reserved
-
62H-63H
MXTPA
yes
no
Top
of
memory,
actualized
by
the
program loader.
64H-65H
no
-
reserved -
66H
DIRLBL
no
no
Directory label of current drive.
May
be read by function 101.
67H-69H
no
-
reserved
-
6AH-6BH
PH$CSV
no
no
Address of checksum vectors of current
drive.
6CH-6DH
PH$ALV
no
no
Address
of allocation vector of
cur-
rent
drive.
May be read by
function
27.
6EH-7FH
DPB
no
no
Disk Parameter Block of current drive.
A
call
of function 31
returns
this
address.
After
system
calls 13 {Reset Disk system) and 14 (Select
Drive),
the
contents of the area from 06AH to 07FH are undefined.
Only on
physical
disk accesses, values are entered there. It is recommended to read these
variables only by the corresponding EOS functions.
EOS System manual
Daeumling & Zimmermann
Page 22
Advertisement
Chapters
Table of Contents
