Sinclair Q68 User Manual page 3

Monochrome display
In the standard QL modes and the high resolution mode 4, the Q68 offers special monochrome display
functions, even if you attach a colour monitor. This is implemented in hardware and does not require any
software changes.
You can make the Q68 screen look like a QL connected to a historic monochrome monitor in black &
white, amber or green
POKE $1C01C, x
Where x is 0 for default colours, 1 for black & white, 2 for amber, 3 for green.
SDHC Drive Interfaces
The Q68 contains hardware for two independent SDHC card interfaces. Fullsize card slots are provided
for easier handling and copying of data between two cards.
Keyboard and Mouse Interface
The Q68 comes with ports for PS/2 keyboard and mouse. The mouse scrollwheel is supported.
Sound
The Q68 provides a stereo sampled sound system. Digital-analog conversion uses 20kHz sample rate
and hardware FIFO buffering for up to 1024 samples. Combined line / headphone output on jack socket.
Realtime Clock
DS1374C-33 real time clock, typical oscillator accuracy approximately 10ppm at 25°C
•
Longlife super-capacitor for oscillator supply backup during power-off
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Integrated recharge capability
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I/O Ports
Serial port with up to 115200 (460000) Baud, external 9 pin SubD connector
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I²C Interface, internal 4 pin connector
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Extension Bus
The Q68 mainboard contains a parallel extension bus with 8 bit data/address bus and control signals for
the possibility of add-ons.
Ethernet
The Q68 has an on-board CP2200 ethernet controller with integrated IEEE 802.3 MAC and 10 Base-T
PHY. At the time this manual was written, no Q68 specific software support for the CP2200 was released.
Board Size
The Q68 mainboard has a size of 8x10 cm and can be mounted in an available case.
Power Supply
The Q68 is powered by a standard regulated 5V supply with 2.1 mm coaxial plug.
QL Compatibility
QL screen modes 4 and 8 are directly hardware compatible. The 50 Hz frame interrupt and those QL re-
gisters which are still useful with the modernized peripherals are available in hardware. Memory map and
interrupt handling are similar. Microdrives and the original (unreliable) serial ports are not supported. The
corresponding registers are currently not implemented.
colour. The Q68 colour translation unit is simply configured by