Specifications

Jumper Configurations
Table A-4
ZT 8832 Cuttable Traces (continued).
TRACE # DESCRIPTION
CT9,
CT1
1-CT13
SBX Expansion Module Address Expan-
sion - increases the number of I/O port
addresses available to the SBX expansion
module by increasing the number of
address lines connected to the expansion
module socket. The default connects
address lines A0 through A6, providing 128
I/O port addresses for each of the two
expansion module chip selects. The Intel
SBX MULTIMODULE standard defines
only three address lines, A0, A1, A2. The
remaining address lines are connected as
shown below.
CT13 CT12 CT11 CT9 Operation
Out Out Out Out A0-A2 only
Out Out Out In A0-A2 and A3 (J4 pin 30)
Out Out In In A0-A3 and A4 (J4 pin 28)
Out In In In A0-A4 and A5 (J4 pin 10)
† In In In In A0-A5 and A6 (J4 pin
24)
†Factory default configuration.
A-19