CMOS RAM BOARD RB32KC
RBI2ZKC C.M.0.S. BATTERY BACKED RAM BOARD
POWER FALLUREu Memory contents are preserved during power failure
by a Ni-cad bacctery that is automatically recharged when the board
is powered up. Contents are secure for up to 40 days.
PAGE MODE SCHEME SUPPORTED. The board may be configured as one 32K
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 chis board, RAM and EPROMs may be mixed.
EPROM PROGRAMMER/ERASERS ARE NO LONGER REQUIRED because by loading
a@ RAM block and then using che hardware write protect Link, the block
becomes equivalent to EPROM.
FEATURES HARDWARE AND/OR SOFTWARE READ/WRITE PROTECTION.
FULLY 80-BUS AND NASBUS COMPATIBLE.
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
* ALL active BUS signals interlaced with ground ‘shield’ tracks.
* All active BUS signals terminated into a potential balanced
* Proper implementation of both the interrupt and BUS request
* Large tracks for power lines.
* Size 15" x 8”. Fits neatly into 19" rack.
* Easily cuc for smaller systems.
Supplied builc and tested wichout connectors.
RB32KC 32K Bytes £225.00 77 way connectors for uses with BPL4C £4.30
16K Bytes £193.00 Few left – Visually imperfect BP14C £47.00
2K Bytes £165.00 Few Left – RB32KC Bare Boards Rev. D £62.50
BP1L4C Backplane £57.00 Memory – Hitachi HM6116LP-3 £5.75
Plus £1.50 per board post and packing, plus VAT.
MICROCODE (CONTROL) LTD.
40 WELL TERR., CLITHEROE,
LANCS,, UK. 0200 27890
GEC LTU-11 PRESTEL MODEM KIT
The GEC LTU-11 PRESTEL modem kit consists of two
components, the modem card and the direct telephone
coupler. The modem card accepts I/O at TTL levels at 75
BAUD and returns data at TTL levels at 1200 BAUD. The
modem card produces the necessary modem tones which are
fed to the direct coupler. The coupler consists of the
line isolation transformer which sends and receives the
modem tones and has TTL level inputs for the control
relays for line seize and auto-dial. Power- supplies are
+5 volts and -5 volts. The units individually have BT
approval, but as the unit is supplied as a kit, the BT
approval is void. Supplied complete with connection data
and auto-dial software.
GEC LTU--11 modem card 14.95 inc. VAT. (13.00 + VAT).
GEC LTU-11 direct coupler 14.95 inc. VAT. (13.00 + VAT).
Carriage & packing 75p for each unit.
7 diag. green screen, 240V AC
mains operated. detachable key pad,
robust case 14’ x 12" x Ty,”
video cutput for other monitors,
security lock. ete. ib ris
tee De ie eee
ORDER BY POST OR PHONE OR CALL IN AND SEE FOR YOURSELF
ideal for travel agents. offices. stock
markel, educational, home and alf
___/___ _______ ____, London, __ ___
Telephone: __-___ ____
TRANSDATA MODEM CARDS.
Brand new, tested and aligned 300 BAUD answer and
originate acoustic telephone modem cards manufactured by
TRANSDATA for their model 317 acoustic modem. Full CCITT
specs. Requires only a few components to complete (no
case available). Computer interface is 300 BAUD RS232
I/O. The power supplies of +12 volts at 18QmA and -12
volts at 170mA are required. Card size 350mm x 105mm.
May be directly connected using the GEC LTU 11
coupler (see below). Full circuit description, drawings
and connection data supplied. Suitable for use with
computers fitted with 300 BAUD RS232 I/O. Software for
Nascom & Gemini published in the last issue.
Card only at 29.95 inc. VAT. (26.04 + VAT)
Supplied with LEDs connector, switches and transducers
at 34.95 inc. VAT. (30.39 + VAT)
Supplied with LEDs connector, switches and GEC LTU 11
direct coupler at 45.95 inc. VAT. (39.96+ VAT)
Carriage & packing 1.00
MINOR MIRACLES 2000 MODEM
The Minor Miracles 2000 direct connect answer and
originate modem is an all ‘bells and whistles’ modem
capable of Bell and CCITT protocols at 300/300, 600/75,
600/600, 1200/75 and 1200/1200 BAUD receive/transmit
with optional auto-dial and auto-answer. Automatic mode
select under software control. Requires RS232 I/O for
data transmission and an optional 4-bit port for mode
control. Uses the AMD 7910 ‘world series’ modem control
chip. BT approved (until you remove the link to activate
the Bell protocols). Separate 220-240V AC mains powered.
Size approx. 140mm x 70mm x 180mm. Supplied complete
with lead terminated in BT620 (the new rectangular type)
plug, manuals, etc.
Modem 148.35 inc. VAT. (129.00 + VAT).
Auto-dial option 34.50 inc. VAT. (30.00 + VAT).
Carriage & packing 1.00
TELEMOD 2 MODEM
The Telemod 2 direct connect answer and originate
modem uses the European CCITT protocols and offers
1200/75 and 1200/1200 BAUD receive/transmit. Requires
RS232 I/O for data transmission. Separate 220-240V AC
mains powered. Supplied with lead terminated with 81620
plug and manuals. Size 165mm x 55mm x 235mm.
Modem 99.95 inc. VAT. (86.90 + VAT).
Carriage & packing 1.00
ON A GEMINI IVC OR SVC
The new Henelec Prestel Terminal
software turns your CP/M based Nascom
or Gemini, fitted with the GEMINI
GM812. or GM832, into a full blown
PRESTEL terminal. Automatic character
sets give proper prestel characters
and mosaics. Automatic select of 40
by 24 screen size, full prestel screen wrapround.
Message facilities allowing full keyboard entry to the
bill boards. Downloading of prestel pages to disk.
Optional auto-dial (with suitable modem) and ID
transmit. Suitable for most 1200/75 BAUD modems, but
designed around the Minor Miracles 2000, the Telemod 2
and the GEC LTU-11. Try cracking the PRESTEL access
codes for yourself!!!
rma wm oO
Supplied on disk (please state format) at:
29.95 inc. VAT. (26.04 + VAT). Carriage & packing 50p
BIG BIG BIG POWER SUPPLIES
Ex-equipment GOULD power supplies for those who
need a lot of power.
Type 1 +5 valts at 20 amps. 7" x 4" x 3.5" o.a.
Switch mode. 220-240 V AC in.
25.95 inc. VAT. (22.56 + VAT)
Carriage & Packing 2.00
Type 2 ‘+12 volts at 4 amps, +5 volts at 40 amps
-E¶ volts at lamp, --12 volts at 1 amp
14.5 x 6” x 3.5" o.a. (including fan)
Thyristor switch mode. 220-240 V AC in
29.95 inc. VAT. (26.04 + VAT)
Carriage & packing 4.00
OPEN 6 DAYS A WEEK
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