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ND164 BUS BRANCHER¶

INTRODUCTION¶

The ND164 — BUS BRANCHER — is designed to be a high performance data channel which is connected to an independent memory port on the ND140 — MULTIPORT MEMORY SYSTEM. The BUS BRANCHER provides high speed data transfers to take place to memory — independently of the CPU.

FEATURES¶

Separate high speed, 18 bit data channel with 256K words address space
No cycle steal from CPU
The BUS BRANCHER may be installed in any BUS RECEIVER (ND163) to provide a separate high speed data channel
Parity checked transfers

PRODUCT DESCRIPTION¶

Prerequisites for the BUS BRANCHER (ND164) are the ND163 — Bus Receiver, the ND174 — 16 Memory Address Registers, and a separate memory port — ND141 — in the Multiport Memory System.

When the BUS BRANCHER is installed in the available slot in the BUS RECEIVER, 18 bit data lines, 18 bit address lines and 3 control lines are available on separate connectors constituting the high speed data channel. The only cabling required are the two channel cables going to the separate memory port in the Multiport Memory System.

All transfers on the high speed data channel are parity checked. In event of parity error, the processor will be notified and two parity error indicators on the BUS BRANCHER (for least and most significant byte) will be activated.

Diagram¶

    +----------------+
    |      Bank X    |
    | +----+----+    |
    | |ND141|ND141|  |
    +----------------+
         |     |
         |     | ND140
         |     |
    +------------+
    |   NORD-10/S |
    +------------+
         |     |
     +---+     +---+
     |             |  
  +--v--+       +--v--+
  | BR  |       | BR  |
  | ND174|      | ND174|
  | ND164|      | ND164|
  +------|      +------|
  | Local|      | Local|
  | I/O  |      | I/O  |
  | Bus  |      | Bus  |
  +------+      +------+

164–B1–1800–0179

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Diagram¶

flowchart TB
    io_main[MAIN I/O BUS]
    io_main -->|Address| io_main_end1[ ]
    io_main -->|Data| io_main_end2[ ]
    io_main -->|Control| io_main_end3[ ]

    subgraph modules
        ND174[ND174<br>Address<br>Register]
        ND174 -->|Driver| control[Control]

        ND163[ND163<br>Bus<br>Receiver]
        ND163 --> MPM[MPM<br>Enable]

        ND164[ND164<br>Bus Brancher]

        MPM -->|Driver| modules_end

        control --> modules_end
    end

    hDMA[High speed<br>DMA Channel]

    hDMA -->|Write| io_main_end1
    hDMA -->|Request| io_main_end1
    hDMA -->|Address| ND174
    hDMA -->|Data| io_main_end2
    hDMA -->|Data ready| io_main_end2

    io_main_end1 --> ND164
    io_main_end2 --> ND164
    io_main_end3 --> ND164

Specifications¶

Specification	Details
Channel transfer rate	1.6 Mbytes /second
Parity	Parity per byte — odd parity
Channel address space	256 Kwords (16 bit words)

Contact Information¶

Company	Address	Telephone
NORSK DATA A.S	Lindebergvn, road 20, Box 4 - Lindeberg gård Oslo 10, NORWAY	Tel. 02-391601, Tlx. 18661 nd n
NORSK DATA ApS	Øverødvej 5 2840 Holte, DENMARK	Tel. 02425055
NORSK DATA DEUTSCHLAND	Abraham-Lincoln-Str. 30 6200 Wiesbaden, WEST GERMANY	Tel. 06121-764220, Tlx. 4186370 noda
ND NORSK DATA AB	Kanalvägen 3, Box 2031 194 02 Upplands Väsby, SWEDEN	Tel. 076-86500, Tlx. 13528 nordata s
NORSK DATA FRANCE	"Le Brevent", Avenue du Jura 01210 Ferney-Voltaire, FRANCE	Tel. 050-408576, Tlx. 385653 nordata fernv
NORSK DATA N.A., Inc.	65, William Street Wellesley, Mass. 02181, USA	Tel. 0617-237.7945
ND NORSK DATA AB	Klangfärgsgatan 11, Box 9052 421 09 Västra Frölunda, SWEDEN	Tel. 031-299350
NORSK DATA FRANCE	120 Bureau de la Colline 92213 Saint Cloud, FRANCE	Tel. 01-6023367, Tlx. 201108 nd paris
RICHARD NORTON (NORD) Ltd.	NORD House, 17 Balfe Street, King's Cross London N1 9EB, ENGLAND	Tel. 01-2785501, Tlx. 299537

NOTE: Norsk Data reserves the right to change specifications at any time without given notice!