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ND Computer Systems¶

Multiplexer Diagram¶

flowchart LR
    A[22 bit ADDRESS] --> B[ADDRESS A]
    A --> C[ADDRESS B]
    A --> D[ADDRESS C]
    A --> E[ADDRESS D]

    B --> F
    C --> F
    D --> F
    E --> F

    F[CONTROL Multiplex Addr MUX Address 2/4 to 1 MUX] --> G[DATA A]
    F --> H[DATA B]
    G --> I[DATA A]
    H --> J[DATA B]
    I --> K[DATA C]
    J --> L[DATA D]

    G --> M[D Multiplexed Multiplexer Channel 22 bit ADDRESS 16 or 32 bit DATA]
    M --> N[Most significant 16 bits (ND 159 only)]
    K --> N
    L --> N
    N --> O[DATA A]
    N --> P[DATA B]
    N --> Q[DATA C]
    N --> R[DATA D]

ND 150 16 BIT MEMORY MULTIPLEXER¶

ND 159 32 BIT MEMORY MULTIPLEXER¶

Introduction¶

The ND 150 and ND 159 16 or 32 bit Multiplexers are used to expand the number of channels into a port in a Multiport Memory System from one to a maximum of 4.

Normally the Multiplexers are used in connection with Shared Memory. If all 4 ports on a Shared Memory has a Multiplexer as input, a maximum of 16 channels may be connected.

Features¶

Up to 4 Memory Channels may be multiplexed onto one.
Accepts 16 or 32 bit wide channel with 22 bit address (ND 150 and ND 159 respectively).
Low MUX overhead.

150/159-A2-1500-1178

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Product Description¶

The ND 150 and ND 159 Multiplexers come in a 19" rack complete with all electronics and wiring for 4 Memory Channels. Each memory channel has Lower and Upper Limit Switches such that each channel's address space may be specified to be anywhere within the total address space of 4 Mwords (22 bits).

There is a fixed and linear priority between the 4 channels, with channel A with the highest and channel D with the lowest priority.

Specifications¶

Description	Value
Worst case MUX delay on a memory cycle for a port	230 ns
Additional latency: Previous port is finished and is different from current port	90 ns (worst case)

Contact Information¶

Country	Contact Information
NORWAY:	Norsk Data A.S Lindebergvn. nord 20, Box 4 - Lindeberg gård OSLO 10 Tel. 02/391601, Tlx. 18661 nd n
DENMARK:	Norsk Data ApS Øverødvej 5 2840 HOLTE Tel. 02-425055
WEST GERMANY:	Norsk Data Deutschland GmbH Abraham-Lincoln-Strasse 30 6200 WIESBADEN Tel. 06121-764220, Tlx. 4186370 noda
SWEDEN:	ND Norsk Data AB Kanalvägen 3, Box 2031 194 02 UPPLANDS VÄSBY Tel. 0760-86500, Tlx. 13528 nordata s
FRANCE:	Norsk Data France "Le Brevent", Avenue du Jura 01210 FERNEY-VOLTAIRE Tel. 050-405876, Tlx. 38563 nordata fernv
U.S.A.:	Norsk Data N.A., Inc. 65, William Street Wellesley, MASS. 02181 Tel. 0617-237.7945
SWEDEN:	ND Norsk Data AB Käringfästagatan 11, Box 9052 421 09 VÄSTRA FRÖLUNDA Tel. 031-299350
FRANCE:	Norsk Data France 120 Bureau de la Colline 92213 SAINT CLOUD Tel. 01-6032367, Tlx. 201100 nd paris
ENGLAND:	Richard Norton (NORD) Ltd. NORD House, 17 Balfe Street, King's Cross LONDON N1 9EB Tel. 01-2785501, Tlx. 299537

NOTE: Norsk Data reserves the right to change specifications at any time. It is our policy to improve products as new techniques and components become available.