80-Bus News

  

May-June 1983, Volume 2, Issue 3











Page 58 of 59











58

Nascom&Gemini USERS

NEW 32K C.M.O3. CUO A

VEU

from MICROCODE (CONTROL) LIMITED

FEATURES:

EFFECTIVELY REPLACES EPROMS

Does away with the inconvenience of EPROM programming

and the compromise of assigning valuable address space

to RON.

ON BOARD RE-CHARGEABLE Ni-Cad BATTERY

RETAINS MEMORY FOR OVER 1000 Hrs.

Battery is automatically charged during power-up periods.

HIGH SPEED OPERATION up to 6 MHz WITHOUT WAIT-STATES.

FULLY NASBUS! and GEMINI-80 BUS? COMPATIBLE.

PAGE MODE SCHEME SUPPORTED

The board can be configured to provide one 32k byte page or

two completely independent 16k byte pages.

Complete pages of 64k bytes are simply implemented by adding

more boards on to the bus.

SOFTWARE and/or HARDWARE READ/WRITE

PROTECTION.

4K blocks in either page are link selectable to be aligned on any

4K boundary.

FULLY BUFFERED ADDRESS, DATA AND CONTROL

SIGNALS.

MEMORY I.C. SOCKETS ARE LINK SELECTABLE TO

SUPPORT ANY 24 PIN 2k byte MEMORY L.C.s.

Thus the board can support up to 32k bytes of any mixture of

cmos, nmos rams or 2716/2516 eproms.

All options are link selectable using wire links plugged into

gold-plated socket pins, avoiding the risk of damage and the

inconvenience caused by soldering links directly to the board.

The printed circuit board is manufactured to the high quality

demanded by industrial users and conforms to B.S.9000.

The board comes assembled and tested and is supplied with a I

minimum of 2k bytes of low-power cmos ram. Fully documented.

: AVAILABLE NOW! PRICES: Board with 32k bytes £184.95 Board with 16k bytes £149.95 Board with 2k bytes £99.95 TC5517AP Very low power 2k cmos memory I.C. £6.50

Please add £1.50 (P&P) & VAT @ 15%

Tnasbus is « trademark of nascom microcomputers a division of LUCAS LOGIC 2trademark of GEMINI MICROCOMPUTERS LIMITED

Cheques/PO’s made payable to:– MICROCODE (CONTROL) LTD __ ____ _____, CLITHEROE, LANCASHIRE, ___ ___

ENGLAND. 0200 27890

For all Microprocessor Applications

Call

MICROCODE (CONTROL) LTD 40 Well Terr., Clitheroe, Lancashire, 887 2AD

England. Tel. 0200 27890

Consultancy, Design and Manufacturing Services_to Industry

NEW PRODUCT

MICROCODE (CONTROL) LTD.

40 WELL TERR., CLITHEROE, LANCS, UK. 0200 27890

“Aspirins are not the only solution

to your backplane problems”

BP14C BACKPLANE

14 SLOT 80-BUS & NASBUS TERMINATED BACKPLANE

BP14C has been designed, using mainframe techniques, to solve microcomputer problems. As the speed of microcomputers increases, the demands on the bussing system become more and more critical. Without the use of a properly terminated backplane, system performance and reliability will inevitably suffer.

BP14C has been designed to overcome the three major backplane problems:

1. Noise generated

2. Noise generated

3. Noise generated

backplane power

by reflected signals. by crosstalk.

and transmitted through rails.

These problems have been attacked on the BP14C by:

1. Terminating ALL active bus signals into a potential balanced R.C. filter.

2. Interlacing all active bus signals with ground ‘shield’ tracks.

3. Forming a complete ground plane on one side of the backplane and using very wide tracks for the other power rails.

The Backplane measures 14" by 8" and supports up to 14 slots. Smaller lengths can be obtained by a simple ‘score and break’ operation.

The backplane will fit neatly into a 19" rack with spare space available for a Power Supply Unic.

The backplane features proper implementation of both the interupt and the bus request daisy chains.

BPi4C is another product designed in line with Microcode (Control) Limited’s commitment to industrial quality 80-bus and NASBUS performance. Price £47.00 plus £1.50 (Post and packing), plus VAT Cheques/PO’s made payable to:– MICROCODE (CONTROL) LTD. 40 Well Terrace, Clitheroe,

Lancs., U.K. Tel. 0200 27890


This is an OCR’d version of the scanned page and likely contains recognition errors.











Page 58 of 59