4-4 Chapter 4: Programming
MSR Interface
3-track MSR and JIS 2-track MSR heads are available. The harness
from the MSR head plugs into the main board. All decode circuitry
resides on the main board. The decoder is based on the Trigantor chip
currently used in NCR Retail products. The keyboard should not be
used while a card is being swiped in the MSR.
ISO and JIS card formats are supported in the initial release. All MSR
data is sent to the host via the Wedge Controller.
PS/2 Keyboard Interface
A PS/2-style keyboard connector permits alphanumeric entry and non-
touch applications to be used through a standard PC keyboard. You
cannot connect and use a Wedge Keyboard in this port.
Panel OFF/ON Sequence
Before turning the Panel Off, turn off the video using Sequencer
Register 1 bit 5 (SR01[S]) in the same manner as IBM recommends for
the standard VGA. To make Video Off more effective, some additional
delay should be included before Panel Off.
By turning the Video Off via SR01[5], the Sequencer is no longer
refreshing the screen. This gives the Sequencer enough bandwidth to
work with the Panel Off logic to do an orderly shutdown of the video
output.
To Next Page
Loading...
