NCR 7454, Руководство пользователя по оборудованию

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Chapter 1: Product Overview 1-15
Higher quality integrated stereo speakers may be added as an option to
the terminal. The amplifier is located on the Processor Board; the
speaker output is provided on a header that receives the harness from
the speaker module. In addition, a Line Out is provided on a 3.5mm
stereo jack that permits connection of external amplified speakers.
The integrated stereo speakers, or an amplifier connected to Line Out,
must be used in order to play Sound Blaster (audio subsystem) audio.
However, an internal EUI speaker provides PC speaker functionality
(beeps and tones) for all configurations.
The volume control can be set using the Windows OS Control Panel.
There is no volume control under DOS.
The PC speaker sounds (such as beeps and touch clicks) are directed
into the audio subsystem and are audible if speakers are connected.
Magnetic Stripe Reader
A 3 ‐ track MSR head is available as an option. The ISO and JIS card
format is supported.
When card data is read, an interrupt is generated. A software device
driver for the MSR must be loaded to enable the application to process
the data.
Touch Screen Controller
The MicroTouch
®
“Excalibur” chip is used to interface the touch panel.
This controller supports MicroTouch capacitive panels.
In order to save an RS ‐ 232 port, the touch data is delivered to the
system through the mouse interface. This requires a mouse ‐ aware
touch device driver for the appropriate OS.
When the system is operating in the dimmed display mode, touch
activity can restore full brightness if instructed by software to do so.
When system is in low power mode, touch activity can generate the
mouse port interrupt (IRQ12).