Epson PX-8 Technical Manual page 27

REV.-A
2.1.2 System Configuration
PX-8's main components include a main battery; the MAPLE (main) board, which along with con-
trol circuitry also contains an auxiliary battery; the LCD unit; the keyboard; and the microcas-
sette drive assembly. The following block diagram demonstrates component configuration.
\
Main
battery
f
I
GAH 40M
Microcassette drive
Drive mechanism
MAP-MC board
MAPLE board
LCD unit
I
Auxiliary battery
I
LCD panel
MAP-LD board
IPL ROM
I
RAM
1
32K 64K
~~----------------------------~I
lr
1r
V
MAIN CPU
:S2C51/GAH40MJ
1
RS-232C
1
z-so
1
~ ~
- - - - -
n~
H
IiPD 7001
Barcode reader
I
SED1320
750S
1
I
I
U
J
1
Timer
Slave CPU
ISED1320/VRAMI
I
6303
I
6K.
I
I
LCD
' "
MASK4K
I
Microcassette
1
H
GAH 40S
I
I
1
_I
tape drive
' "
~
GAH 40S
I
1 ROM capsule
1
1
I
~
Speaker I]
I
(built-in/external)
1 Serial interface
I
1
Keyboard
I
1
Sub-CPU
750S
1 Analog device
1
1
Fig. 2-2 Computer Configuration
2-3