COMCON CONTROL

Frel Ltd has announced its new ComCon programmable joystick interface for the Spectrum. Any key on the keyboard can be programmed, including both shift keys, and there is provision for two independent fire buttons.

The interface has arrays of pins which correspond to the keyboard and six leads representing the four directions and the two fire buttons. To program it you must plug the relevent lead into the pin you want. That can be done with a program running and the keyboard is not disabled. Any joystick with an Atari-style plug can be used. To allow for other add-ons there is an extender card which rises vertically from the front of the board.

The two joysticks that Frel markets are the Flightlink and the Quickshot II which has been adapted to have two independent fire buttons. The joystick usually has an Auto-Fire feature but that has been removed.

At £19.95, the interface is one of the cheapest on the market. The Flightlink joystick costs £10.50 and the Quickshot II is £13.95; a £2.00 reduction on either can be obtained if ordered at the same time as the interface. Further details from Frel Ltd, Hockeys Mill, Temeside, Ludlow, Shropshire SY8 1PD.

PRICE: £7.45
SUPPLIER: Flight Link Control

A much better version of the same thing is the Computer Joystick: which is self-centring and is therefore much more responsive. It's also rather more robust.

STICKING TO THE BEST

Zap in style. John Lambert juggles with joysticks.

Joysticks are the most popular add-on for the Sinclair computers, not just for playing games but also for drawing, cursor control in word processing packages and for moving anything around the screen. The keyboard can be used for all of those things but it is so much easier with a joystick.

Choosing a joystick from the hundreds available is not an easy decision, but this guide will show you what to look for, and how to connect it to a Spectrum or QL.

Joysticks are generally all the same. They may be different shapes and sizes but they all contain a number of simple switches which get turned on or off as the stick is moved. That type of digital joystick was first used on a home computer by Atari and, therefore, is sometimes known as the Atari standard. All Sinclair machines use this type of joystick interface.

The switch used can vary a great deal. The cheapest joysticks, such as Quickshot 1, us a bubble which when compressed by the stick makes contact. Those can wear fairly quickly and cannot stand up to heavy use.

Next in price and strength are leaf spring switches where the stick causes two pieces of metal to make contact. Finally, the most expensive joysticks use microswitches. Those will last a long time and can easily be replaced should they go wrong.

Generally, you should buy the most expensive joystick you can afford as that way it should last a long time. Try to get one with a metal shaft in the handle - plastic ones break - and, if possible, try it out in the shop. The feel of a joystick is very important, some are sloppy and others require a lot of movement before they register.

it is within the interface that the complications arise. All interfaces have at least one Atari standard socket where the joystick is plugged in, but those vary in how they tell the computer when the stick has been moved.

Which type of interface you buy will depend on what software you want to use with it. The most common method is known as Kempston - named after Kempston Microelectronics who invented it. What that does is to configure the interface as part of the Z80 I/O map so that it can be read - to find what position the joystick is in - using the instruction IN 31.

Another method is for the interface to emulate the cursor keys - five to eight plus zero as fire. For obvious reasons that is known as Cursor.

The third method is known as Sinclair and emulates the six to nine keys, with zero as fire. That is based on Interface 2 from Sinclair. Why Sinclair wanted to bring out yet another method is anybody's guess!

The problem is that until you but the software you have no way of knowing which of those three methods it will use. Many programs give you a choice but unfortunately not all. The way to get round that is to use a programmable interface.

Those allow you to let each stick direction and fire represent a key on the keyboard. All games have a keyboard option and you just set the interface to the keys it uses. That also gets round the problem of game that do not use any of the three normal methods - Psion is very bad in that respect.

Unfortunately, programmable interfaces tend to be the most expensive, and in some cases can be very difficult to set up. For playing arcade games a Kempston standard interface is the most useful, and the cheapest. Some interfaces combine more than one method in the same box, but the more facilities it has the more expensive it will be.

Some joysticks offer extra facilities and you should take care when buying those. Although it is popular to have two fire buttons on a joystick, in many cases they are joined electrically and perform the same function, so it does not matter which one you press. Some joysticks, however, have two, independent, fire buttons and some interfaces can take advantage of this. That type of joystick can also be used with interfaces which normally only expect one fire button, and so are particularly worth considering. Care should be taken, though, as pressing the used button on some interfaces, will cause the computer to crash.

Another common extra is auto-fire, giving an auto repeat on the fire button.

In order to make their interfaces more attractive some companies add extras which are not related to joysticks. The best known is probably the Nidd Valley Slomo which lets you slow down the computer so that - in theory - the games are easier to play. Two other products, the Opus Discovery 1 disc drive, and the Mikro-Gen Mikro-Plus include Kempston compatible interfaces.

As far as the QL is concerned life is much simpler. The two control sockets on the back are already wired to emulate either the cursor keys and space, or the function keys. All you need to plug in a joystick is an adaptor which fits the control socket at one end and a standard joystick at the other. Joysticks are available which plug straight into the QL - ones that have a QL style plug rather than the Atari standard. The problem with those is that when you upgrade to a different computer you will have to buy another joystick, as it is unlikely it will fit the new machine.

Buying a joystick and interface can be a harrowing experience. Don't be afraid to try out half a dozen in a shop - and don't buy from a shop which won't let you experiment. Ask your friends and, of course, read the reviews in Sinclair User.

Flightlink Hotshot
Company: Frel
Telephone: 0584-4894
Price: £10.50

Small hand held joystick with a very good precise, action and two independent fire buttons.

BATTLEFIELD JOYSTICK

Joysticks are your most immediate connection with any game you play - the man-machine interface. The melting joystick makes a nice image for an advertiser who's suggesting that his games can beat anything, but do joysticks in real life really stand up to the beating they receive, are they tough enough for the job, do they move well, are the handles right, will the buttons fire?

The CRASH reviewing team settled down for a weekend of joystick bashing on several types and makes, and here we look at the results...

There are now many makes of joystick available, and almost as many types as there are makes. Each boasts design innovations so that it is better than all the others - and they come in a range of prices too. We all know that joysticks on arcade machines take a battering, so too do those at home. Do they stand up? We tested 19 joysticks from well known manufacturers to see how they all compared.

A joystick must be able to withstand games that require fast and repeated movement, so what better than Ocean's Daley Thompson's Decathlon? We used the Commodore version of the game because it is more violent than the Spectrum! But it isn't only toughness; joysticks must also be capable of fine and positive movement, comfortable to use with sensible fire buttons. Several arcade skill games were used to test four major points for both the stick action and the fire button action.

TRAVEL means the maximum movement between opposite poles (e.g. up/down) on the stick, and how far the fire button had to be depressed. On stick action over 1.5 inches was considered to be very long. Oddly, some of the short sticks had longer to travel than the taller sticks.

ACTION FORCE means the amount of hand or finger pressure required to keep the stick pressed over or the fire button down.

REACTION SPEED indicates how fast contact is made, how quickly the action affects the game, and how well rapid movements can be made (especially rapid fire buttons).

RESPONSE/FEEDBACK indicates how positive the stick or fire action feels and whether there is any physical or audible feedback to tell the player that contact has been made.

ERGONOMICS how useful is the stick for hand held playing, and how well does it operate on a table top. Is the stick well designed for comfort, ease of fire action and general stability.

After preliminary testing, the joysticks all went through ten minutes of the Decathlon to see how long they were likely to stand up to use. During this test, some joysticks broke.

Finally, all the sticks have 9 pin D connectors and are Atari compatible on the pin outs. They all need an interface of one sort or another to work with the Spectrum (except the clip-ons). Some offer 2 independent fire actions, but these only work with either a Cambridge interface or the programmable Comcon from Frei Ltd., which was the interface used for this test.

Each joystick review is split into two halves; firstly a brief technical breakdown; secondly the review team's report.

COMPETITION PRO

Supplier: Euromax Electonice Ltd., Pinfold Lane Industrial Estate, Bridlington, N. Humberside, Tel (0262) 602 541.

Price: £16.95

Lever Action: Strong steel shaft suspended in rubber bush. 4 industry standard V3 microswitches actuated by plastic bush.

Fire Action: 2 large arcade style round fire buttons actuating leaf contact switches.

Ergonomics: Average size well rounded enclosure for handheld operation. Rubber feet for table top operation.

Plastic moulded 0 type connector and moulded sleeved grommet.

Weak point: Body flexes under action

STICK ACTION

Travel: short, in fact just about right.
Action force: light.
Reaction speed: instant.
Response/feedback: although in most respects identical to the Pro 5000 this stick has audible clicks - generally very good.

FIRE ACTION

Travel: very short.
Action force: very light - good rapid fire
Reaction speed: Fast.
Response speed: good, with hard positive feel.

Ergonomics: base too large for handheld use, stable on table top with well placed left hand fire buttons on base. Comfortable knob shaped slick.

Life expectancy: Good.