Parallel Port Address

[zackiv31]

I'm trying to write a C program to output bits over the parallel port, but my question is what is the address of my parallel port? I've read places it might be 0x0378... but I'm not sure... Here is the output of information that I think might be helpful?

[root@localhost ]# lspci
00:00.0 Host bridge: Intel Corporation 82855PM Processor to I/O Controller (rev 03)
00:01.0 PCI bridge: Intel Corporation 82855PM Processor to AGP Controller (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 81)
00:1f.0 ISA bridge: Intel Corporation 82801DBM (ICH4-M) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801DBM (ICH4-M) IDE Controller (rev 01)
00:1f.3 SMBus: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 01)
00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 01)
00:1f.6 Modem: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Modem Controller (rev 01)
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon R250 [Mobility FireGL 9000] (rev 02)
02:00.0 CardBus bridge: Texas Instruments PCI1520 PC card Cardbus Controller (rev 01)
02:00.1 CardBus bridge: Texas Instruments PCI1520 PC card Cardbus Controller (rev 01)
02:01.0 Ethernet controller: Intel Corporation 82540EP Gigabit Ethernet Controller (Mobile) (rev 03)
02:02.0 Ethernet controller: Atheros Communications, Inc. AR5211 802.11ab NIC (rev 01)
[root@localhost ]# lspci -n
00:00.0 0600: 8086:3340 (rev 03)
00:01.0 0604: 8086:3341 (rev 03)
00:1d.0 0c03: 8086:24c2 (rev 01)
00:1d.1 0c03: 8086:24c4 (rev 01)
00:1d.2 0c03: 8086:24c7 (rev 01)
00:1d.7 0c03: 8086:24cd (rev 01)
00:1e.0 0604: 8086:2448 (rev 81)
00:1f.0 0601: 8086:24cc (rev 01)
00:1f.1 0101: 8086:24ca (rev 01)
00:1f.3 0c05: 8086:24c3 (rev 01)
00:1f.5 0401: 8086:24c5 (rev 01)
00:1f.6 0703: 8086:24c6 (rev 01)
01:00.0 0300: 1002:4c66 (rev 02)
02:00.0 0607: 104c:ac55 (rev 01)
02:00.1 0607: 104c:ac55 (rev 01)
02:01.0 0200: 8086:101e (rev 03)
02:02.0 0200: 168c:0012 (rev 01)

I'm using the outb() function and also ioctl() if anyone is curious.

[gjb123]

The following command should give you the address on your machine
cat /proc/ioports|grep parport0

[zackiv31]

Wow that is perfect... thanks!!!!!

(how do you people learn all this stuff?)

[gjb123]

I was trying to control LEDs connected to a parallel port last year.
I ended up using parapin. http://parapin.sourceforge.net/doc/parapin.html