Sinclair QL User Manual page 8

The connectors at the back of the computer are for attaching the following:
NET
NET
POWER
RGB
UHF
SER1
SER2
CTL1
CTL2
ROM
ZX ROM cartridges are not compatible with QL ROM cartridges and cannot be used in the
The slot on the left hand side of the QL is used for adding peripherals (equipment to
expand the computer's capabilities} to the QL. One peripheral can be plugged directly into
the expansion slot.
The reset button is on the right hand end of the computer near the Microdrive expansion
slot. It is used to reset' the QL to its original 'switch on' state Any programs in the machine
will be lost if reset is pressed and sometimes data already recorded on Microdrive
cartridges can be corrupted. Use reset with caution and always remove Microdrive
cartridges before doing so.
To make the computer operate, various connections have to be made:
Your QL power supply has two leads. One is fitted with a small rectangular connector with
three holes in it. The other is the mains lead and is supplied with bare ends to which a
suitable mains plug must be fitted.
- connector for the QL Network
- connector for the QL Network
- power supply for the computer
- connection to a monochrome or colour monitor
- connection to the aerial socket of a television set
- RS-232 C serial port
- RS-232-C serial port
- control port for joystick
- control port for joystick
- QL ROM cartridge software (use reversed one to 10)
QL.