Epson PX-8 Technical Manual page 167

REV.-A
3.2.4 Jumpers and Switches
The following jumpers and switches are mounted on the RAM disk unit board. The switches SW
1 and SW 2 will be accessed by user.
Table 3-4 Jumper and Switch
Jumper/switch Standard Drawing coordination Function
J1
-
D.E -4
Select a RAM capacity: 6DK or 1 2DK bytes,
according to the installed RAM elements.
J2
-
E -2 Specifies the main CPU.
Enable/disableloRAM write protection
ON: Enables write protection - allows read
SW1 ON ONE-4 only.
OFF: Disables write protection - allows both
read and write.
Enable/disable battery backup
ON: Enables battery backup - allows battery
SW2 ON A-6 charge/discharge.
OFF: Disables battery backup - battery
charge/discharge is inhibited.
JUMPERS
I
------ - - --- - ----.-- _41 __________
-:;-----~-----------------4~--
___ _
~
I
°EJo
~
\0
6DK byte setting
12DK byte setting
o
I
WRITE PROTECT
I
SW1
N
...,
~2 lo~
~4
TOSHI SA
12A
N EC
SWITCHES
BACK UP
OFF
(I
I IIJON
SW 2
Fig. 3-31 Jumper and Switch Location
3-21
C
Z-SO
(1A)