Radio Shack TRS-80 Model III - Real-Time Clock

OPERATION
10 /
Real-Time
Clock
The Model III
contains
a
real-time clock. It
is always running, except
during
cassette and disk I/O and
during certain other
operations
.
The clock keeps
the following
information in memory:
Abbrev.
MO
DA
YR
HR
MN
SS
The clock includes
the logic for
28 ,
30 and 3
1
-day months
.
It does not recognize leap
years
.
When you start the
Computer, the clock is set to
all zeroes:
00/00/00 00:00:00
Range of
Values
Memory Location
Month 01
-
12 16924
Day
01
-31
16923
Year
00
-
99
16922
Hour
00-23
16921
Min.
00-59
16920
Sec.
00
-
59
16919
To Set the
Clock
Simply store the
appropriate data in the
memory addresses
given above. You may
do
this
by
running
the following
program:
10 DEFINT
A-Z
20 DIM
TM(5)
30 CL
=
16924
40 PRINT
"INPUT
50 INPUT
TM<0>»
TM<1>»
60 FOR I
=
TO 5
70
POKE
CL
80 NEXT I
90 PRINT
"CLOCK
IS
SET"
100
END
6 VALUES: MO?
"M<2>
i
I
»
TM (
I
)
DA?
YR?
HR? MN, SS"
TM<3>»
TM<4>?
TM(5)
53