Epson PX-8 User Manual page 14

ii) Open the plastic switch cover on the base of the PX-8.
Fig. 2.4
iii)
Press the push button reset switch near the DIP switch. The switch is co-
vered to present accidental resetting of the sub CPU. It has a hole in the
top through which it is possible to push the switch. Do not use a conduc-
tive implement to push the switch, or one whose end can break off (e.g.
a pencil).
SW4
.~
0 0
1 =
€]) 0 0
ROM 2 ROM 1
Fig. 2.5
2-6
iv) Replace the cover. Turn the PX-8 over and switch the power back on. The
following message will then be displayed on the LCD screen:
SYSTEM INITIALIZE
ENTER DATE TIME (MMDDYYhhmmss) 000000000000
Fig. 2.6
This display image is the same as, that displayed after system initialization
described in Section 2.2.5b.
The display shows the first of a series of questions. These set the date and time,
and the organization of the memory.
The first question the display shows allows the date and time to be entered.
The expression:
MMDDYYhhmmss
shows the order in which the items have to be entered. The number of items
corresponds to the row of zeroes to the right of the message. The first zero
is covered by a flashing block. This is the cursor, which is used throughout the
operation of the computer to show the position of the next character to be print-
ed. It can sometimes be moved by using the cursor keys which are the keys
marked with an arrow on the right of the keyboard. This movement is under
the control of either an applications program or the overall controlling pro-
gram or operating system which on the PX-8 is called CP 1M. The use of CP 1M
is discussed in Chapter 3. In this particular case only two of the cursor keys
are active. They are the right and left pointing arrows which allow movement
of the cursor within the bounds of the row of zeros. By using these keys the
flashing cursor can be placed over anyone of the zeros and when you have
chosen a particular position the value can be altered by pressing the appropri-
ate numerical key. The cursor then moves to the next position to the right.
The various letters correspond to the date and time as follows:
MM: month (e.g. 01 for January and
11
for November)
DD: day of the month
YY: year (e.g. 84 for 1984)
2·7