Compaq VAX 7000 Guía de instalación descargar pdf (Pagina 19)

On DEC 7000/10000 systems Futurebus+ Proﬁle B is used as an I/O bus. A brief description

of the hardware involved is given below. For a detailed explanation see the DEC 7000

AXP/VAX 7000 I/O System Technical Manual. For more on concepts do CBI (see Section 2.1,

Training ).

5.2 Hardware

See Figure 4, Generic PIU Layout

The Futurebus+ consists of a 10 slot backplane and card cage, plus regulators. These make

up the Futurebus+ PIU. Slot 5 is dedicated to the DWLAA (aka. FLAG) module. If this

module is not present the box will not power up.

The DWLAA provides the interface between the Futurebus+ and the LSB. It contains a hose

interface (to the LSB), a Futurebus+ interface, Futurebus+ arbitration logic plus other logic

required for the Proﬁle B implementation.

5.2.1 Futurebus+ Options

The following table lists current options for the Futurebus+. For more information see Alpha

AXP Systems Handbook.

Interconnect Vendor Description

FDDI DEC DEFAA, adapter for Fibre Distributed Data Interface (FDDI).

Something to do with networks

HiPPI Aeon System Inc., Myriad

Logic

Adapter for High Performance Parallel Interface (HiPPI). Used

for storage, computer interconnections and networks.

IPI GENROCO Inc. Adapter for Intelligent Peripheral Interface (IPI). Used for disk

storage.

VMEbus Cable and Computer Tech-

nology, Nanotek

Bridge to IEEE VMEbus. Used for analog and disk I/O and

networks

6 Console

DEC/VAX 7000/10000 systems have an "imbedded" console, similar to that of the 6000 series.

At initialisation, the primary CPU "wins" the console RX and TX lines. It loads the console

code (actually an UNIX-based Operating System) from it’s Flash ROM into main memory.

When this runs, you get the >>> prompt.

From now on it’s like any other console, except that the command syntax is different (of

course!) It’s case sensitive, it uses "-" for ﬂags, it’s UNIX! See Pocket Service Guide and

Console Reference Manual for command descriptions.

The Flash ROM also contains other code. (EG: ucode patches, PALcode). Any changes to

this or the console code require a complete reload of the Flash ROM. This is achieved using

the Laser Firmware Update (LFU) utility. See Section 7. In a multi-CPU system, do not

use the console UPDATE command until you’ve read this section.

See Section 14, Known Features, Restrictions and Problems for known console problems

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Compaq VAX 7000 Guía de instalación Pagina 19