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- Path: photon.bli.uci.edu!pho
- From: pho@photon.bli.uci.edu (Peter Ho)
- Newsgroups: comp.dcom.modems
- Subject: Re: Two modems ?
- Date: 9 Feb 1996 02:09:35 GMT
- Organization: University of California, Irvine
- Message-ID: <4feacv$kta@news.service.uci.edu>
- References: <DMB6xz.F50@mv.mv.com> <3119419B.1DE6@tempe.vlsi.com>
- NNTP-Posting-Host: photon.bli.uci.edu
-
- In article <3119419B.1DE6@tempe.vlsi.com>,
- Charles Marslett <charles.marslett@tempe.vlsi.com> wrote:
- >Well, most parallel printer ports use IRQ7, so unless you can
- >get rid of all printer ports, or disable the interrupt or move
- >it from the standard location, you will have a similar conflict
- >at IRQ7. IRQ6 may well be usable, but I'm not really sure.
-
- AFAIK, IRQ7 is reserved for the parallel port but left unused since
- access to the parallel port is done through polling rather than
- interrupt driven. When I added a second modem that only supports
- IRQ3/4/5 I had to bump the sound card to IRQ7 to free up IRQ5. The
- sound card is working fine on IRQ7 and so is everything else. As for
- using IRQ6, that wouldn't be a good idea unless you have a floppyless
- system as IRQ6 is used by the floppy controller. Looking at my system's
- IRQ utilization (below), I'm thinking it would be a great idea to get a
- motherboard with a PS/2 mouse connector (normally connected to IRQ12) so
- that I can free up IRQ4 for something else like another modem to take
- advantage of all three lines in the house.
-
- IRQ
- 0 system timer
- 1 keyboard
- 2 programable interrupt controller
- 3 Cardinal MVP288I #1
- 4 mouse
- 5 Cardinal MVP288I #2
- 6 floppy disk controller
- 7 Sound Blaster 16
- 8 real time clock
- 9 Adaptec 2940W SCSI adapter (MO drive)
- 10 ethernet card
- 11 Diamond Stealth 64 Video 2001
- 12 possibly free or reserved for PS/2 mouse
- 13 numeric data processor
- 14 primary IDE controller (two HDs)
- 15 secondary IDE controller (one CDROM)
-
-