Jumpers, J17 watchdog timer – Multi-Tech Systems RAS96 User Manual
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RASCard Description
CommPlete Communications Server
7
Table 1. Memory Configurations.
Bank 1
Bank 2
TOTAL
None
None
0 MB
2 × 4 MB
None
8 MB
2 × 4 MB
2 × 4 MB
16 MB
2 × 8 MB
None
16 MB
2 × 8 MB
2 × 4 MB
24 MB
2 × 8 MB
2 × 8 MB
32 MB
2 × 16 MB
None
32 MB
2 × 16 MB
2 × 8 MB
48 MB
2 × 16 MB
2 × 16 MB
64 MB
2 × 32 MB
None
64 MB
2 × 32 MB
2 × 16 MB
96 MB
2 × 32 MB
2 × 32 MB
128 MB
Jumpers
The RASCard has five configuration jumpers. One is used for the watchdog timer; the
other four are used to select the CPU frequency and the CPU-to-bus frequency ratio.
J17 Watchdog Timer
Jumper pins 1 and 2 to enable the watchdog timer. Jumper pins 2 and 3 to disable the
watchdog timer. The watchdog timer is enabled by default, as shown in Figure 1.
J14, J15, J16, J18 CPU Frequency Selection
Jumper J14, J15, J16, and J18 to select the CPU frequency and CPU-to-bus frequency
ratio for the installed CPU, as shown in the following table. In Figure 1, the jumpers are
shown configured for a 166 MHz Pentium.
Warning:
The RASCard supports only the following Intel Pentium CPUs. Do not
replace the original CPU with a Pentium Pro, MMX, AMD, or Cyrix CPU.
Intel Pentium
J14 J15 J16 J18
100 MHz
Out
Out
In
In
133 MHz
In
Out
In
In
166 MHz
In
In
In
In
200 MHz
Out
In
In
In