Radio Shack TRS-80 26-3650

C.
RAMI
(1
)
Remove optional
RAM module if
equipped.
(2)
Push
the ALL RESET button
on the
bottom.
(3)
Operate DEFM
62
[EXE.
(4)
Write
the
following program.
10 FOR I
=
1
TO
87
20 A (I)
=
I
30
PRINT
A
(I)
40 NEXT I
50
PRINT "RAM
OK"
60
END
(5)
After
writing the above
program, confirm
that the
remaining
program
step
is 0.
(6)
Execute
the program and confirm
the display
counts
up from
1 to 87 and shows
RAM
OK by
every
depression of
the
[eTxeTJ key.
If
the
above operations cannot
be made,
RAM 1 may
be faulty.
D.
RAM
2
(Optional
RAM
module)
(1)
Install the RAM module in
a
PC-4.
(2)
Push the
ALL RESET
button on the
bottom.
(3)
Operate [MODE
1
1
and
confirm
that
the
remaining
program
step
is
1568.
If the display
shows the
remaining step
as 544
.
(a) RAM
2 is not
functioning.
(b) Wiring between
CPU
and RAM
2
has
failed.
(4)
Operate DEFM
190
|EXE|
and
confirm
the
display
***VAR:216.
(5)
Write the following
program.
10
FOR I
=
1
TO
215
20 A (I)
=
I
30
PRINT
A
(I)
40 NEXT I
50
PRINT
"MODULE
OK"
(6)
Execute
the
program and
confirm
the
display
counts
up from
1 to 215 and
shows
MODULE
OK
by every
depression
of [EXEjkey.
If
the
above program
is not
performed,
the
RAM
2
(optional
RAM module)
may be
at fault.
-
9
-