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3.2 Bcache Size Jumpers (Option 14,15)
The Bcache size jumpers are located at J28–27/28 (Option14) and J28–29/30
(Option15), as shown in Figure 3–1. The AlphaPC 164UX-2/-4 is configured with
2MB/4MB of Bcache during production ; the other jumpers shown in Figure 3–1
(0,1) are for other implementations.
Note:
The standard motherboard is manufactured with 128K
18 data SSRAMs.
3.3 Boot Option Jumper (Option 11)
The boot option jumper is located at J28-21/22 (Option 11). The default position for
this jumper is out (Figure 3–1). This jumper selects the image to be loaded into mem-
ory from the system flash ROM. With the jumper out the ARCSBIOS firmware is
loaded. With the jumper in, the Safe ARCSBIOS is loaded.
Bcache Size Jumpers (Option 14,15)
AlphaPC 164UX Jumper Configuration
18 or 256K
X
X
3–3
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