User`s guide

2.1 Configuration Jumpers
Table 2–1 (Cont.) Configuration Jumper Position Descriptions
Feature Jack/Jumper—Pins and Description
BC_SIZE<2:0> J1—11/12 (CONF4), —13/14 (CONF5), —15/16 (CONF6) (eb164.4)
These jumpers allow the Bcache to emulate the sizes specified
in the following table. These jumpers are changed in conjunction
with the appropriate index jumpers J17, J16, and J15.
CONF4
Pins 11/12
CONF5
Pins 13/14
CONF6
Pins 15/16 Bcache
In In In Reserved
In In Out Reserved
In Out In Reserved
In Out Out 2MB (default)
Out In In 4MB
Out In Out 8MB
Out Out In Reserved
Out Out Out Reserved
Bcache size–
index address bits
<22:20>
J17, J16, J15 (eb164.6)
Jumper
2MB
2
(default) 4MB
3
8MB
3
J17 (index22) 2 to 3 2 to 3 1 to 2
J16 (index21) 2 to 3 1 to 2 1 to 2
J15 (index20) 1 to 2 1 to 2 1 to 2
2
SIMMs populated with 128K 8 or 512K 8 SRAMs
3
SIMMs populated with 512K 8 SRAMs
(continued on next page)
System Configuration and Connectors 2–5