home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!wupost!cs.utexas.edu!qt.cs.utexas.edu!yale.edu!ira.uka.de!math.fu-berlin.de!news.netmbx.de!uropax!midips!morty
- From: morty@midips.in-berlin.de (Martin Poetter)
- Subject: Interface board design question
- Message-ID: <1992Sep01.121535.17590@midips.in-berlin.de>
- Organization: Private Organisation fuer angewandte Informagie
- Date: Tue, 01 Sep 1992 12:15:35 GMT
- Lines: 24
-
- Hi,
-
- I'm designing an interface board which makes use of the DMA request lines.
- The board interfaces to a kind of sensor. This sensor is working without
- interruption, so the board will always request for a DMA transfer, no matter
- whether you want it to transfer or not.
-
- 1- Is it right that you can enable the transfer process by programming the
- DMA controller chip? How is it done?
-
- 2- Will the continous DMA request be ignored while no transfer shall take
- place?
-
- 3- Is there anything special about the AT's 16-bit DMA transfer? Where lies
- the "wrap-around" boundary?
-
- Thank you,
- Martin from Berlin, Germany.
-
-
- --
- morty@midips.in-berlin.de
- Martin Poetter / W1000 Berlin 20 / Germany
- Student d. E-Technik, TU Berlin, 6. Sem.
-