FAS on a Microchannel Box with Xenix

[Uwe Doering]

ron at mlfarm.uucp (Ronald Florence) writes:

>I recently compiled and tried to install FAS 2.07 on our ps2/80
>running Xenix 2.3.3.  We have two IBM dual-asynch boards (four ports)
>in addition to the motherboard port.
>
>By defining NEED_PUT_GETCHAR, I got the new kernel to boot, with the
>following startup messages from FAS:
>
>   %fas      0x03F8-0x03FF	04	-	unit=0 type=* release=2.07.0
>   %fas      0x02F8-0x02FF	03	-	unit=1 type=* release=2.07.0
>   %fas      0x3220-0x3227	03	-	unit=2 type=* release=2.07.0
>   %fas      0x3228-0x322F	03	-	unit=3 type=F release=2.07.0
>   %fas      0x4220-0x4227	03	-	unit=4 type=F release=2.07.0
>
>I am not sure why FAS thinks the on-board port and the first
>dual-asych board are not capable of FIFOs.

This means that there are no NS16550A chips on the main board and the
first dual-asynch board. Check out what type of chips they used instead.
Or maybe there are versions of the NS16550 that aren't compatible with
the `A' type. Don't know. All I can say is that I got the infos on how
to auto-detect the FIFO type from the original National Semiconductor
data sheet for the NS16550A, and obviously it works for the majority
of FAS users.

>So far, the question is
>academic, because I cannot get gettys running on the serial ports,
>and FAS seems to lock up the console until the only relief is the
>red switch.
>
>I used the following declarations in space.c:
> [contents of space.c deleted]

Your space.c seems to be o.k. Did you enter the following line in
/usr/sys/conf/master?

	sio      4  0537 104    fas  0   0   5    1   7    3     4     33   34  

Someone told me that you have to run /usr/sys/conf/configure after you made
the changes to the necessary config files.

If this doesn't work the only reason for your problems I can think of is
the different handling of interrupts. On the AT bus interrupts are edge
triggered while on the micro channel they are level triggered. Maybe this
breaks FAS' interrupt handler.

Has anyone been able to run FAS on an IBM micro channel system? And don't
forget to tell us under what operating system.

     Uwe
-- 
Uwe Doering  |  Domain   : gemini at geminix.in-berlin.de
Berlin       |----------------------------------------------------------------
Germany      |  Bangpath : ...!unido!fub!tmpmbx!geminix!gemini