IO adresses

[mafias]

how do i interpet these IO adresses... i mean, i got this isa pnp isdn card and it says 0x0100 is minimum io address an 0x3f8 maximum. so, what addresses are there between, is it like 0x0101, 0x0102 and so on?

[Popeye]

Those addresses are in hexadecimal (how you'd count if you had 16 fingers http://www.linuxplanet.com/discussion/wink.gif) and they go like this:
0=0
1=1
2=2
3=3
4=4
5=5
6=6
7=7
8=8
9=9
a=10
b=11
c=12
d=13
e=14
f=15
So, those addresses would go:
0x0100
0x0101
0x0102
0x0103
0x0104 ....
0x010a
0x010b
0x010c
0x010d
0x010e
0x010f
0x0110
etc...
Understand? http://www.linuxplanet.com/discussion/wink.gif I knew you would!

[mafias]

thanks... but that's what i already knew. i know they would go like thay with hexadecimals, but the thing i wanted to know is that, can i assign this kind of addresses just like that, if they're free? i mean, can any device use any address in between what's said...

and i don't get it, in isapnp HOWTO there was an example: the modem needed 32 io addresses (at least i remember so) and there was only one assigned like (IO 0 (BASE something))

I CAN'T UNDERSTAND! HEELP!

[mafias]

oops. i didn't actually know that when i posted that question (got to know it other way), sorry and thank u very much, Popeye...

but i still don't know what to do http://207.153.253.38/discussion/frown.gif(

[mafias]

oops. i didn't actually know that when i posted that question (got to know it other way), sorry and thank u very much, Popeye...

but i still don't know what to do http://207.153.253.38/discussion/frown.gif(

[7DeadlySins]

An IO address is there to provide the OS with the information about which serial ports exist.
The serial ports are labeled ttyS0, ttyS1, etc. You can map an IO address that is free within your system to a serial device by using the "setserial" command.
Be careful tho.. you'll get some funny responces if your IO addresses overlap on different ports!
I've never used an ISDN card, but if the IO is free, I'd set its start address to 0x300 and see what happens.

Have fun!

7DS




[This message has been edited by 7DeadlySins (edited 05-11-99).]