SOFTWARE STRAPPING
The following asynchronous communications features are selected
by the operating system software:
• 5, 6, 7, or 8-bit data characters
• 1,1 1/2, or 2 stop bits
• Odd, even, or no parity
® Baud rates at — 50 1800
75 2000
110 2400
134.5 3600
150 4800
300 7200
600 9600
1200 19200
• Line break signal generation and detection
• False start bit detection
• Parity overrun, and framing error detection
• Internal diagnostics
HARDWARE STRAPPING
Hardware straps are used to indicate K211, K212, or K213, see
Figure 2.42.
J1 J2
K 211 (Modem)
K212 (Printer)
K213 (Plotter)
Closed
Open
Open
Open
Closed
Closed
Figure 2.42 RS-232-C Hardware strapping
CENTRONICS PERIPHERAL ADAPTER
The adapter (K210) provides an interface between the computer
and Centronics-compatible (parallel) printers.
The adapter consists of a small printed circuit board, con
taining an 8255 programmable communications interface and
support logic, a connecting cable and plug, and a housing that
allows direct connection to the I/O bus of the NCR DECISION
MATE V.
2-62
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