Name: Sinclair ZX Spectrum 128
Brand: Sinclair
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The diagram below gives details of the pin configuration of the Spectrum 128's RGB output. The monitor dealer

should be able to advise you how to make the connections to the monitor.

Connecting an extension keypad

The Spectrum 128 has an optional extra extension keypad which provides extra facilities when editing programs and

works as a games controller and calculator.

The keypad is connected by its own coiled cable which fits into the socket on the front of the computer. There is a

slight pause after you first switch on the Spectrum 128 during which the keypad will not respond. Note that the

keypad functions are not available when running 48 BASIC or playing a 48K game, and so the keypad need not be

connected. It can safely be unplugged while the computer is switched on.

Connecting a cassette recorder

A cassette tape recorder can be connected to the Spectrum 128 for loading or saving programs in a similar way to

that described on pages 12 and 13 of the ZX Spectrum + User Guide.

Note that the MIC and EAR sockets are on the left of the computer rather than at the back, and that the double lead

can be used either to connect the EAR socket on the Spectrum 128 to the EAR socket on the cassette player (for

loading) or MIC to MIC (for saving) - you should not connect both at the same time. You can plug or unplug the lead

while the computer is switched on.

You can also use a cassette player as an external amplifier, as shown on page 37 of he ZX Spectrum + User Guide.

Connecting Microdrives

Sinclair Microdrives are a powerful means for saving and loading programs more quickly than using tapes. They are

connected to the Spectrum 128 by using a Sinclair Interface 1, as described on pages 46 and 47 of the ZX

Spectrum + User Guide.

Connecting a joystick

A joystick can be connected to the edge connector on the back of the Spectrum 128 by using a suitable interface

which should be available with the joystick. Make sure that the model you buy will work with your software, as there

are several joystick standards. Do not connect or disconnect a joystick interface while the Spectrum 128 is switched

on.

Connecting a printer

The Spectrum 128 can be used with many types of printer which conform to the RS232 standard (the commonest

type) or which are fitted with an RS232 interface. A separate list of suitable models can be obtained from Sinclair

Research.

The printer plugs into the RS232 socket on the left hand side of the Spectrum 128, using a special connecting lead

which can be obtained from Sinclair Research.

Printers such as the Sinclair ZX printer which were designed for earlier Spectrum models can also be used with the

Spectrum 128 but will only work when the computer is running 48 BASIC, They are not suitable for use when the

Spectrum 128's special features are in use. This type of printer plugs onto the edge connector at the back of the

computer.

Connecting musical instruments

The Spectrum 128 can be used to control electronic musical instruments such as synthesizers and drum machines

which conform to the MIDI standard (see page 14).

To make the connection, you need a MIDI lead which is available from Sinclair Research.

Connecting other peripherals

Your Spectrum 128 can be connected to a wide variety of other computer peripherals such as light pens, disk drives

and modems. Make sure that the equipment is specifically compatible with the Spectrum 128 as well as other

Spectrum models. Connection details should be provided by the manufacturers of the equipment.

Pin Signal Level

1 Composite PAL 75 Ohms, 1.2 Volts pk-pk

2 0 Volts DC

3 Bright output TTL

4 Composite sync TTL

5 Vertical sync TTL

6 Green TTL

7 Red TTL

8 Blue TTL

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Brand	Sinclair
Model	ZX Spectrum 128
Category	Desktop
Language	English

Sinclair ZX Spectrum 128 User Manual

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