Owner`s manual

DRAFT

Chapter 5

Installing the KA66A Processor (All

Upgrades)

This chapter tells how to install the KA66A processor in the XMI card cage.

CAUTION: At this point, it is believed that a few H7242 regulators (which

supply the +3.3V power to the KA66A processor board) may produce voltage

high enough to damage the chip. Before installing the KA66A, measure the

voltage at the remote sense connection points on the XMI backplane for the

+3.3V bus bar (the top left bar is the +3.3V bar and the third from top left

bar is the ground bar). The voltage must be in the range 3.26–3.43V. A

higher voltage may damage the chip. If the voltage is out of range, replace

the H7242 regulator with one that does test within the proper range.

Chapter 4 gives conﬁguration rules for systems upgraded with an H9657-

CX kit. See Appendix A for conﬁguration rules for all other cases.

Note that the KA66A processor will only work with MS65A memories. The

manual VAX 6000: Installing MS65A Memories describes the installation

of MS65A memories.

NOTE: The H9657-CX kit, consisting of a power regulator module and a bus

bar, is provided with KA66A processor module upgrades from VAX Model

200, 300, or 400 systems. You do not use the kit in all cases, however.

The H9657-CX kit is only used for an upgrade from a system that does not

supply +3.3V, and where the following conditions hold:

• No battery backup is needed

• No more than 4 processors are needed

• No more than 12 XMI slots are needed

Installing the KA66A Processor (All Upgrades) 5–1