Date: Fri, 5 May 1995 17:12:25 +0200 From: Frank Nobis <fn@trinity.radio-do.de> To: bde@zeta.org.au Cc: archive@cps.cmich.edu, hackers@FreeBSD.org, jim@reptiles.org Subject: Re: AST 4 port, pppd and FreeBSD 2.0--950412-SNAP Message-ID: <199505051512.RAA03900@trinity.radio-do.de> In-Reply-To: <199505051400.AAA23749@godzilla.zeta.org.au> (message from Bruce Evans on Sat, 6 May 1995 00:00:43 %2B1000)
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>>>>> "Bruce" == Bruce Evans <bde@zeta.org.au> writes:
>> This is what I use in my kernel config
>> options "COM_MULTIPORT" #Multiport support in sys/isa/sio.c ...
>>
>> device sio5 at isa? port 0x1b8 tty irq 9 flags 0x501 vector siointr
>> device sio4 at isa? port 0x1b0 tty flags 0x501 vector siointr
Bruce> Specifying a vector without specifying an interrupt used
Bruce> not to make any sense. However, now userconfig (booting
Bruce> with -c) allows you to change the irq and not the vector,
Bruce> it's safest to always specify an irq.
This is from my old 1.1.5.1 kernel. When is added irq 9 to all ast
ports the kernel build fine, but configured only sio5. sio[432] are
discarded during attach through irq conflict with the master
port. Without the vector, the old 1.1.5.1 kernel won't even build.
I never changed my config file when I moved to 2.0, so I don't know if
this would work now as expected. Obviously my card runs with all 4
ports using the above configuration.
>> >> And is there a way to put all four of the AST cards into one
>> >> machine???
>> My AST clone has only two IO address spaces low as above and a
>> high space with 0x2a0, 0x2a8, 0x2b0 and 0x2b8. If your cards
>> has more than this two it is possible as long as there are 4
>> irq lines available.
Bruce> I checked the docs for a standard AST 4port (actually a
Bruce> 1986 Async Cluster Adapter). It has the same limitation on
Bruce> addresses, except it allows the first two ports to be at
Bruce> the standard COM1-2 addresses. It allows plenty of
Bruce> interrupts (IRQ2-7).
Bruce> Bruce
I can configure my card in two ways:
Port DOS Enhanced
1 com1/irq4 0x1a0/irqx
2 com2/irq3 0x1a8/irqx
3 0x1b0/irqx 0x1b0/irqx
4 0x1b8/irqx 0x1b8/irqx
irqx means irq[2-7] as shared irq.
So when I configure two cards in enhanced mode, I get 8 ports. I don"t
what happens to port 3/4, if one add a third card in DOS compatible
mode to get 10 ports, since that gives a conflict in the I/O space.
Frank
--
Frank Nobis Email: fn@Radio-do.de
Landgrafenstr. 130 fn@Germany.EU.net
44139 Dortmund Fax: +49 231 7213816
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