80-Bus News

  

July-August 1984, Volume 3, Issue 4











Page 43 of 43





43

DATA

MAINS ISOLATING SWITCH MODE POWER SUPPLY

439-50

+ VAT,

ru

INPUT VOLTAGE RANGE User selectable — wire ink

180 to 266 Volts AC at 50/60 Hz 90 vo 132 Volts AC at 50/60 Uz

CONTINUOUS DC OUTPUTS at BO? C AMBIENT + BV DC at 3.0 Amps + V2V DC at 1.3 Amp

OUTPUT RIPPLE and NOISE + SV output 8 mV peak to peak maximum +12 V output 100 mV peak to peak maximam

= WV DC at 0.3 Amp

OUTPUT HOLD UP OUTPUT NOTES: > 1 missing cycle at SO Hz ta} Total power output at power supply tarmninals fot to extend 7 Watts

OVERCURRENT PROTECTION

4b) A minimum load of 0 5 Amp +h is une ee on +8 V ounput is coquaed for Ail outputs are proated aganst accidental short-circuits

specifind regulation

te} Output ratings can be increased under controlled ambient conditions. (Contact VMS Tachrusal Services Department}

id} The following individual continuous DC outputs at BO" C ambient are the maximum permutted rabngs under power “wade off” conditons

OVERVOLTAGE PROTECTION Operates on the +5 Volt outpat at a nommnal level of 6.2 Votts

+ §V DO @ 40 Amps +12 V DC @ 20 Amps “32 DC @0.3 Ame

OPERATING TEMPERATURE + 50’ C maximum

SAFETY and ISOLATION

4 0 kV input to output {relevant components)

ZZ KV DC mput to output and earth (compiete unit} 97 mA maaumum earth leskage

LINE REGULATION 0.5% maxmnum over specified input voltage range

LOAD REGULATION

4+ 5 V output (over range 0, Sto 3.0 Ampst 1% +12 V outputfover mange 0 25 to 13 Amp ) 10% -12-V outputiover renge 6. 0108.3 Amp | 5%

FUSES A Mains fuse (2.0 Amps TD) 18 prowdad on the PCB

a CENTRE UTD.

Tel: 02403 22307. Telex: 837788 18 Woodside Road, Amersham, Bucks.

CMOS RAM BOARD RB32KC

RB32KC C.M.0.$. BATTERY BACKED RAM BOARD

POWER FAILURE? Memory contents are preserved during power fatlure by a Ni-cad battery that is automatically recharged when the board is powered up. Contents are secure for up ta 40 days.

PAGE MODE SCHEME SUPPORTED. or two 16K pages.

FLEXIBLE ADDRESS DECODING. Any 4K memory block may be Located on any 4K boundary in the processor address space.

NO SOLDERING. ALL options are selected by wire links pushed into gold plated connectors.

EPROM OPTION. On this board, RAM and EPROMs may be mixed.

EPROM PROGRAMMER/ERASERS ARE NO LONGER REQUIRED because by loading a RAM block and then using the hardware write protect link, the block becomes equivalent to EPROM.

FEATURES HARDWARE AND/OR SOFTWARE READ/WRITE PROTECTION. FULLY 80-BUS AND NASBUS COMPATIBLE.

BACKPLANE BP14C

BP14C 14 SLOT 80-BUS & NASBUS TERMINATED BACKPLANE (Bare Board Weighs 15 oz!)

* Ground plane on one side of double sided 2.4mm thick printed circuit board.

ALL active BUS signals interlaced with ground ‘shield’ cracks.

ALL active BUS signals terminated into a potential balanced R.C. filter.

* Proper implementation of both the interrupt and BUS request daisy chains.

* Large tracks for power lines.

* Size 15% x 8". Fits neatly into 19" rack. * Easily cut for smaller systems.

Supplied buile and tested without connectors. PRICES:

RB32KC 32K Bytes £225.00 16K Bytes £193.00

The board may be configured as one 32K

77 way connectors for uses with BP14C £4.30 Few left – Visually imperfect BP14C £47.00

2K Byces £165.00 Few left – RB3ZKC Bare Boards Rev. D £62.50 BPL4C Backplane £57.00 Memory – Hitachi HM6116LP-3 £5.75

Plus £1.50 per board post and packing, pius VAT.

MICROCODE (CONTROL) LTD.

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

TRIED AND TESTED SOFTWARE SPECIALLY S

ELECTED FOR YOUR GALAXY COMPUTER

N.B. This is just a selection – phone for latest details. WORD PROCESSING LANGUAGES £

£ BASIC interpreter Microsoft 325 Wordstar MicroPro 295 BASIC compiler Microsoft 365 Mailmerge MicroPro 145 ECO-C (includes M-80) Ecosoft 210 Spellstar MicroPro 145 Pro Fortran Prospero 220 Starindex MicroPro 116 CIS Cobol Microfocus 425 Wordstar Professional MicroPro 399’ Macro-80 Microsoft 185

Pro Pascal Prospero 220

DATABASE & FILE MANAGEMENT

£ INFOCOM GAMES Infostar MicroPro 295 £ dBase ll Ashton-Tate 365 Deadiine, Enchanter, Infidel Friday! Ashton-Tate 195 Planettall, Suspended & Quickcode Fox & Geller 200 Witness 43 each Personal Pearl Pearl Software 150’* Starcross, Zork |, 1 & lll 36 each FINANCIAL PLANNING HANDS-ON TRAINING FROM MicroCal

£ £ Calcstar MicroPro 116 CP/M, dBase It & Muitiplan 80 each Supercaic Sorcim 126 BASIC 150 Supercalc 2 Sorcim 195 COBOL 330 CRITICAL PATH ANALYSIS ETC. BOOKS

£ £ Milestone Organic Software 269 C Programmers Guide — Purdum 14.50 Datebook Organic Software 269 C Prog’s Library – Purdum et al 15.80 Pertmaster Abtex 650 C Programming Language -K & R 17.95 Free post & packing in UK “Special offer for limited period Fast delivery Add 15% VAT to all prices for UK sales “*Special offer, few only Access and Visa card holders welcome

Either enclose a cheque made payable to ‘Business Computer Developments’ or quote your credit card number. Please state which disk format you require. Products referred to are trademarks or registered trademarks of the companies oforigin.

CP/M is a registered trademark of Digital Research Inc.

BC

Business Computer Developments The Saddlery

___ _______ ____

Chingford

__ ___ Phone __-___ ____


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