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- From: ahummel@ems.cdc.com (H. Austin Hummel)
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: DMA overflow? BOCA 14.4k modem at fault?
- Message-ID: <21686@nntp_server.ems.cdc.com>
- Date: 31 Aug 92 18:28:03 GMT
- References: <9208290325.AA28138@sonne.cso.uiuc.edu>
- Sender: sys@ems.ems.cdc.com
- Reply-To: you@ems.cdc.com
- Organization: Empros Systems International, a division of CDC
- Lines: 31
- Nntp-Posting-Host: otan.ems.cdc.com
-
- In article <9208290325.AA28138@sonne.cso.uiuc.edu>, fortony@sonne.cso.uiuc.edu (F. S. Ortony) writes:
- |>
- |> Greets!
- |>
- |> I just installed a fine BOCA 14.4K internal modem today,
- |> after much hassling with the interrupts and com ports.
- |> I finally managed to get no conflicts. Heck, after a while,
- |> I was even able to connect to other hosts.
- |>
- |> However, something strange (and unfortunately repeatable)
- |> popped up after I used the modem for a while. When I tried
- |> to heavily access the floppy drive, I got 'DMA overflow'
- |> and immediate program termination (the program was 'rawrite.exe',
- |> a program which writes an image directly on the disk).
- |> Rebooting, both hard and soft, didn't help one bit; I get a
- |> few tracks of the floppy rawritten, and then bam, DMA overflow.
- |> If I try again, the DMA overflow message is immediate.
- |>
- |> So my question is, what is 'DMA overflow', am I in trouble,
- |> and does it have anything to do with my modem? I am very loath
- |> to try to disconnect the modem, as it's buried extremely firmly
- |> in my computer's innards right now. I would normally just be
- |> looking ashen at such scary error messages, but the idea that this
- |> modem could have somehow done something bad to my pc makes my
- |> skin crawl.
- |>
-
- No the problem is that the Floppy controller can not keep up with
- the modem. either input/output from the hard disk or a RAM disk.
- Most floppy controllers are too slow for that usage unless there is
- some buffering.
-