[ltp] using serial ports on ibm thinkpad 600e

[Raj, Ashok]

Hello.

I have a ibm thinkpad 600e. Its 366PII 128m memory.

iam trying to use the serial ports and have no success with.

any ideas pls send me..

--------------------------------------
Iam trying to use the thinkpad 600e as a debug station for my kernel
debugging for source level
using kgdb. To try out i used the tpctl and saw that the serial port was
already enabled. 

then i connected a null modem cable to a windows system and did 

cat > /dev/ttyS0

i was not able to see that on the hyperterm on windows. I do the same on
desktop pcs runing linux
when i do the same thing, i can see what i type being displayed on the
hyperterm on windows.

what other things could be there that the linux is not able to send chars
out the serial port.

here is the output

[root@ldebug /root]# tpctl -rsx
resource state:                                       current
   serial port 1:                                     disable 0x0   IRQ0
   serial port 2:                                     enable  0x3f8 IRQ4
[root@ldebug /root]#

[root@ldebug /root]# cat /proc/ioports
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
0180-01bf : cb_enabler
01f0-01f7 : ide0
0376-0376 : ide1
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(auto)
8400-8413 : usb-uhci
fcf0-fcf7 : ide0
fcf8-fcff : ide1
c80bf000-c80bffff : Intel Speedo3 Ethernet

[root@ldebug /root]# setserial -g /dev/ttyS0
/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4

[root@ldebug /root]# setserial -g /dev/ttyS0
/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4
[root@ldebug /root]#
[root@ldebug /root]# stty -a < /dev/ttyS0
speed 9600 baud; rows 0; columns 0; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W;
lnext = ^V; flush = ^O; min = 1; time = 0;
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