Main Circuit Board Jumper Settings - Epson Equity III User Manual

Number of wait states for EPROM. If necessary, you can change the
number of wait states (1 or 2) used by the EPROM. Please consult your
dealer for assistance.
Number of wait states for 16-bit device access. If necessary, you can
change the number of wait states (1, 2, 3, or 4) required by the 16-bit
optional devices. Please consult your dealer for assistance.
Table A-2 shows the functions for the six jumpers on the main circuit
board.
Table A-2. Main circuit board jumper settings
Jumper number
4
1 2 3
A
B A
A B
A
B
Default setting
l
To access the main circuit board jumpers, you must remove the board
from the main unit. Do not try to access the jumpers while the board is still
in the computer.
1. Remove the memory card from the computer, as described above.
2. With the front of the computer facing you, remove the four screws that
secure the circuit board to the computer, as shown in Figure A-5.
Function
5 6
Set coprocessor clock at 8 MHz
2 wait states for EPROM access *
1 wait state for EPROM access
A A 4 wait states for 16-bit device *
B A 3 wait states for 16-bit device
A B 2 wait states for 16-bit device
B B 1 wait state for 16-bit device
l
A-5