Digital

NAME

scc − serial keyboard/mouse/communications interface

SYNOPSIS

controller  scc0  at tc0  slot 3  vector sccintr

DESCRIPTION

Two base board Zilog scc dual UARTS provide DECstation 5000/100 and DECstation 5000/300 workstations with keyboard, mouse, and serial communications interfaces. The serial communications interfaces include full modem control and can operate at baud rates from B50 to B38400 (see tty(7)). 

The data signal connections for the 2 scc chips follows:

SCC/PortUsage

0/AMouse

0/BCommunications port 1

1/AKeyboard

1/BCommunications port 2

In server configurations (that is, no graphics header), serial port 2 (/dev/tty01 on non-server configurations) becomes the system console. The serial system console port always operates at 9600 BPS, 8-bits, no parity. No modem control is supported. 

RESTRICTIONS

Data communications equipment attached to the console serial port in server configurations must be set to 9600 BPS, 8-bits, no parity. The scc driver enforces this restriction. 

FILES

/dev/consoleconsole terminal

/dev/tty00local terminal

/dev/tty01local terminal

RELATED INFORMATION

console(7), devio(7), tty(7), MAKEDEV(8)