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Date: Sun, 19 Mar 1995 13:43:20 +0100
From: Julian Howard Stacey <jhs@regent.e-technik.tu-muenchen.de>
Message-Id: <199503191243.NAA15422@vector.eikon.e-technik.tu-muenchen.de>
To: bde@zeta.org.au, dufault@hda.com
Subject: Re: Multiport serial cards
Cc: freebsd-hackers@freefall.cdrom.com
Sender: hackers-owner@FreeBSD.org
Precedence: bulk

Re.
> is there an AST/8, or other 8 port 16550 board that works
> with the "sio" driver?  There will be at least two other light duty
> serial ports for this application.  An AST/4 plus COM1 and COM2
> will do it, but I would just as soon identify another path.

I use an 8 serial card with 16450s, 
seems to me it'd be trivial to chop them off, solder suck the pads,
& solder on 16550s .... 

whay I use is this:
# Card Name:            Decision 8801.
# Manufacturer:         Decision Computer Int. Co., Ltd.
# Comment:              8 Port Hardware documented in /sys/i386/isa/isa_8com.h
#       8 * NS16450N, Selectable: irq 2,irq 3,irq 4,irq 5,irq 6,irq 7.
options "COM_MULTIPORT"         # Multiport support in sys/isa/sio.c
device sio0     at isa? port 0x2A0 tty          flags 0x0301    # irq 4
device sio1     at isa? port 0x2A8 tty          flags 0x0301    # irq 4
device sio2     at isa? port 0x2B0 tty          flags 0x0301    # irq 4
device sio3     at isa? port 0x2B8 tty irq 4    flags 0x0301    vector siointr
device sio4     at isa? port 0x1a0 tty          flags 0x0701    # irq 5
device sio5     at isa? port 0x1a8 tty          flags 0x0701    # irq 5
device sio6     at isa? port 0x1b0 tty          flags 0x0701    # irq 5
device sio7     at isa? port 0x1b8 tty irq 5    flags 0x0701    vector siointr

I have more info in my /sys/i386/isa/isa_8com.h which I can mail you,
if you want. (The card was about 300 DM about 3 years ago, 
(2.35 DM ~ 1 UK Sterling)

Julian S