Setting Serial Port Characteristics

The default settings for both TTYA and TTYB for most Sun systems are:

9600 baud, 8 data bits, no parity, 1 stop bit, no handshake

The communications characteristics for the two serial ports, TTYA and TTYB, are set using the following values for the ttya-mode and ttyb-mode parameters:

• baud = 110, 300, 1200, 2400, 4800, 9600, 19200, or 38400 bits/second

• #bits = 5, 6, 7, or 8 (data bits)

• parity = n (none), e (even), or o (odd), parity bit

• #stop = 1 (1), . (1.5), or 2 (2) stop bits

• handshake = - (none), h (hardware (rts/cts)), or s (software (xon/xoff)).

For example, to set TTYA to 1200 baud, seven data bits, even parity, one stop bit, and no handshake, type:

ok setenv ttya-mode 1200,7,e,1,- 
ok

Changes to these parameter values take effect immediately.

rts/cts and xon/xoff handshaking are not implemented on some systems. When a selected protocol is not implemented, the handshake parameter is accepted but ignored; no messages are displayed.