Alpha 1000A Instruction Manual Page 13

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Hardware Updates
AlphaServer 1000/1000A Supplement 1-3
CPU Card Jumper Settings
Your system has one of two possible variants of the CPU card. Figure 1-2
shows one variant of the CPU card; Figure 1-3 shows the other. Compare
the card on your system to those in these figures to determine which
variant of the CPU you have.
A jumper on the CPU card activates the fail-safe loader and provides the
standard boot setting. Bank 4 allows the system operate with Bcache
disabled. The jumper is labeled either J1 or J4, depending on which
variant of the CPU card you have. Figure 1-2 shows the J4 jumper and its
default setting. Figure 1-3 shows the J1 jumper and its default setting.
Table 1-1 shows the other jumper setting functions.
Figure 1-2 CPU Card J4 Jumper Settings
J4
MLO-013462
0 1 2 3 4 5 6 7
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