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- Path: newsstand.tc.umn.edu!not-for-mail
- From: pede0135@gold.tc.umn.edu (Todd M Pederson)
- Newsgroups: comp.sys.amiga.emulations
- Subject: Re: Bridgeboard memory address conflict?
- Followup-To: comp.sys.amiga.emulations
- Date: 18 Mar 1996 09:32:53 -0600
- Organization: University of Minnesota
- Sender: pede0135@gold.tc.umn.edu
- Message-ID: <4ijvn5$iit@gold.tc.umn.edu>
- References: <4ii4qc$kur@vixen.cso.uiuc.edu>
- NNTP-Posting-Host: gold.tc.umn.edu
- Summary: Yes, but easy enough to avoid.
- Keywords: i/o, address, keywords-are-silly, bridgeboard
-
- In article <4ii4qc$kur@vixen.cso.uiuc.edu>,
- Brent Busby <claevius@firefly.prairienet.org> wrote:
- >I'm adding a 2-Ser/1-Par/1-Game I/O board to one of the ISA slots in my
- >system for the bridgeboard's use. Appendix B of the A2386 bridgeboard
- >manual lists $02Fx, $037x, and possibly other alarming memory locations
- >as addresses that expansion cards should not use. Then they go on to
- >say later in the same appendix that it is possible to add an I/O board
- >for purpose of adding ports to the PC side of the system. This would
- >seem to be a contradiction in terms, since $02F8-02FF is the traditional
- >location of the COM2 serial I/O port, and $0378-037F is the traditional
- >location of the LPT1 parallel port. Erg. The situation gets even more
- >complicated by the fact that the manual also says that the native side
- >LPT1 emulation is one of the features, like keyboard emulation, that
- >will continue to function even when the Janus Handler is not loaded.
- >And that would imply that even though I am not loading the Janus Handler
- >on my setup, I can still possibly expect problems from this address. Or
- >can I? The LPT1 native emulation will get out of the card's way, right?
- >Right? (Please say yes.) And likewise for the other I/O port addresses?
- >I also note that IRQ3 is listed as an interrupt to avoid even though that
- >is the traditional IRQ used for COM2/COM4. Can anyone who has installed
- >an I/O card for a bridgeboard advise me here? They say it's possible,
- >but they certainly do seem to say a lot of forboding things that don't
- >make it easy for you, that is, unless all of this just applies to a
- >bridgeboard that doesn't *have* an I/O card installed taking over those
- >particular addresses, which I certainly hope is the case.....
-
- I've got one of those cards in mine set to COM2 and LPT2 (COM1
- disabled) with a 28.8 internal modem set to COM1. The only problem I
- ran into was some software would mysteriously completely lock the machine
- if the modem was set to anything other that COM1, or if the serial card
- was set to COM1. Most applications behave themselves though.
- --
- Michael Pederson Psychology Department User Services
- pede0135@gold.tc.umn.edu 251 Elliott Hall 75 East River Road
- VMail 612/626-0363 Pager 612/539-5664 University of Minnesota - Minneapolis
-