Software Strapping; Hardware Strapping; Centronics Peripheral Adapter - NCR Decision Mate V Hardware System Technical Manual

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 —
• 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.

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
50
75
110
134.5
150
300
600
1200
K 2 1 1 (Modem)
K212 (Printer)
K 213 (Plotter)
Figure 2.42 RS-232-C Hardware strapping
1800
2000
2400
3600
4800
7200
9600
19200
J1 J2
Closed Open
Open Closed
Open
Closed