DMA Timing Query

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#8483

From: Wes Plouff - NAC LAN Engr 226-74...
Date: Thu, 14 Apr 1988 00:25

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Now that DMA peripherals are starting to show up (i.e. A2090), can 
anyone on the net give some guidelines on DMA timing in the Amiga.

Specifically, what is the maximum recommended delay between bus request 
and bus grant?  What is the maximum recommended time for an alternate 
master to keep the bus?  Can the A2090 (any version) run into problems 
if it has to wait too long to get bus mastership?

Pointers to official Commodore documentation are welcome.

Thanks in advance,

-- 
Wes Plouff				|  Ashes to ashes
Digital Equipment Corp.			|    Dust to dust
Littleton, Mass.			|  Let the rich man live
plouff%nac.dec@decwrl.dec.com		|    And the poor man burst
- or - ...!decwrl!nac!plouff		|	     -- The Oyster Band

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Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!bloom-beacon!gatech!mcnc!decvax!decwrl!nac.dec.com!plouff
From: plouff@nac.dec.com (Wes Plouff - NAC LAN Engr 226-7423)
Newsgroups: comp.sys.amiga.tech
Subject: DMA Timing Query
Message-ID: <8804132031.AA08782@decwrl.dec.com>
Date: 14 Apr 88 00:25:00 GMT
Organization: Digital Equipment Corporation
Lines: 18