### SCO OpenServer Port Names for Xr Adapters

Format used for port names:

/dev/ttyr bp, /dev/prr bp

ttyr | Base name
prr | Base name for DigiPRINT ports
b | Adapter number (1-4)
p | Port Identifier (a-p, A-P) Lower case letters denote non modem control ports. These ports do not require DCD to be asserted before they can transmit data. Upper case letters denote modem control ports. These ports require DCD to be asserted before they can transmit data.

#### Example:

Port 4 of Adapter 2 is /dev/ttyr2d. The same port with modem control is /dev/ttyr2D. The corresponding DigiPRINT devices are /dev/prr2d and /dev/prr2D.

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