Date: Sat, 6 May 1995 00:00:43 +1000 From: Bruce Evans <bde@zeta.org.au> To: bde@zeta.org.au, fn@trinity.radio-do.de 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: <199505051400.AAA23749@godzilla.zeta.org.au>
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>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 Specifying a vector without specifying an interrupt used not to make any sense. However, now userconfig (booting with -c) allows you to change the irq and not the vector, it's safest to always specify an irq. > >> 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. I checked the docs for a standard AST 4port (actually a 1986 Async Cluster Adapter). It has the same limitation on addresses, except it allows the first two ports to be at the standard COM1-2 addresses. It allows plenty of interrupts (IRQ2-7). Bruce
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