80-Bus News

  

March-April 1983, Volume 2, Issue 2











Page 53 of 55











53

NascomsGemini USERS NEW 32K C.M.0:S. INOUE eC

For all Microprocessor Applications

Call

MICROCODE (CONTROL) LTD __ ____ _____, Clitheroe, Lancashire, ___ ___

England. Tel. ____ _____

Consultancy, Design and Manufacturing Services. to Industry

RAM BOARD

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 ROM. ™

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 LC. SOCKETS ARE LINK SELECTABLE TO SUPPORT ANY 24 PIN 2k byte MEMORY LC.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 minimum of 2k bytes of low-power cmos ram. F’ uly

decumented.

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%

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

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

ENGLAND. ____ _____

NEW PRODUCT

MICROCODE (CONTROL) LTD.

40 WELL TERR., CLITHEROE, LANCS, UK. 0200 27800

“Aspirins are not the only solution

to your backplane problems”

BP14C BACKPLANE

14 SLOT 80-BUS & NASBUS TERMINATED BACKPLANE

BP1i4C 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 ma jor 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 Unit.

The ba€kplane features proper implementation of both the interupt and the bus request daisy chains.

BP14C 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 53 of 55