Jumper Configurations
Table A-1
Jumper Descriptions (continued).
JUMPER #
DESCRIPTION
W65(A,B)
Install W65B to drive the STD bus write
signal (WR*) during I/O cycles with the
8288 I/O Write control (IOWC*).
Install
W65A to drive WR* with the 8288 Ad-
vanced I/O Write control (AIOWC*). The
AIOWC* signal starts one clock earlier with
respect to IOWC* in the four clock CPU
cycle. Factory default installs W65A.
W65A
W65B
Function
IN †
OUT
Select advanced write pulse for I/O cycles
OUT
IN
Select normal write pulse for I/O cycles
A-50
