Acorn Computers Limited PLUS 1, Руководство пользователя

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Setting up 3
Using a small coin or screwdriver, screw the two large screws in the Plus 1 into the Electron.
Do not overtighten.
If the screws do not engage in the threads in the base of the Electron, try
reseating the Plus 1 on the Electron's expansion connector.
The Plus 1 should now be firmly attached to your Electron. Turn the Electron over and plug the
power supply (and any other cables you may have removed) into the Electron and turn it on.
Check that the Electron still works normally, by loading and running a small program which you
know has run successfully before. If all is not well, refer to chapter 6.
Now you have fitted the Plus 1 to the Electron and checked that the system works, you can
connect your printer, joysticks, games paddles or cartridges.
Using a printer
To connect a printer, you will need an extra mains socket (or an adapter) to power the printer
and an interface cable to connect the printer to the Plus 1. You should be able to obtain a
suitable cable from your dealer.
Put the printer on a stable, flat surface near enough to your Electron so that the interface cable
can reach. Turn both the Electron and the printer off. Connect the printer cable to the printer as
instructed in the printer manual, then connect the other end of the cable to the Plus 1 as follows:
—The printer socket is the wide rectangular socket at the rear of the Plus 1 to the right of the
analogue input socket (viewed from the rear). Insert the printer cable plug in this socket so
that the triangular mark on the socket housing lines up with the similar mark on the plug.
—Turn the printer and Electron on again.
You are now ready to use the printer for simple printing tasks. To turn printing on, type CTRL
B
or execute
VDU
2 in a program; all output displayed on the screen will then be sent to the printer
as well. To turn printing off, type CTRL
C
or execute
VDU 3
in a program. For full details of
using a printer, see chapter 4.
Using games paddles or joysticks
Only use games paddles or joysticks which are compatible with the Plus 1 (ask your dealer or
see chapter 3). Turn the Electron off and plug the cable into the Plus 1 'analogue in' socket,
which is the smaller socket at the rear to the left of the printer socket The plug and socket are
shaped so they will only fit together