[syslinux] isolinux serial console keyboard issue
H. Peter Anvin
hpa at zytor.com
Fri Jan 16 01:27:05 PST 2004
Floriola wrote:
>
> Do you have any clue why in the syslinux docu there is
> no word about the "serial" flow control option?
>
This is what's in syslinux.doc:
SERIAL port [[baudrate] flowcontrol]
Enables a serial port to act as the console. "port" is a
number (0 = /dev/ttyS0 = COM1, etc.) or an I/O port address
(e.g. 0x3F8); if "baudrate" is omitted, the baud rate defaults
to 9600 bps. The serial parameters are hardcoded to be 8
bits, no parity, 1 stop bit.
"flowcontrol" is a combination of the following bits:
0x001 - Assert DTR
0x002 - Assert RTS
0x010 - Wait for CTS assertion
0x020 - Wait for DSR assertion
0x040 - Wait for RI assertion
0x080 - Wait for DCD assertion
0x100 - Ignore input unless CTS asserted
0x200 - Ignore input unless DSR asserted
0x400 - Ignore input unless RI asserted
0x800 - Ignore input unless DCD asserted
All other bits are reserved.
Typical values are:
0 - No flow control (default)
0x303 - Null modem cable detect
0x013 - RTS/CTS flow control
0x813 - RTS/CTS flow control, modem input
0x023 - DTR/DSR flow control
0x083 - DTR/DCD flow control
For the SERIAL directive to be guaranteed to work properly, it
should be the first directive in the configuration file.
NOTE: "port" values from 0 to 3 means the first four serial
ports detected by the BIOS. They may or may not correspond to
the legacy port values 0x3F8, 0x2F8, 0x3E8, 0x2E8.
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