Jumper Configurations
Table A-1
Jumper Descriptions (continued).
JUMPER #
DESCRIPTION
W64(A,B)
Install W64A to drive the STD bus write
signal (WR*) during memory cycles with the
8288 Memory Write control (MWTC*).
Install W64B to drive WR* with the 8288
Advanced Memory Write control (AMWC*).
The AMWC* signal starts one clock earlier
with respect to MWTC* in the four clock
CPU cycle. Factory default installs W64B.
W64A
W64B
Function
IN
OUT
Select normal write pulse for memory cycles
OUT
IN †
Select advanced write pulse for memory cycles
A-49
