Article View: comp.sys.atari.st
Article #23487Re: 030 sync cycles (...)
From: Brian Grier
Date: Tue, 26 Jan 1993 16:46
Date: Tue, 26 Jan 1993 16:46
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1587 bytes
elendir@inf.enst.fr writes: > Stig Vidar Hovland writes > > ] Mr. Joern Moe has probably circuit diagrams for the Falcon and in that case > ] he should know what he is talking aboat. With additional hardware, it is > possible > ] to terminate an access to 16 bit memory with STERM. > Of course with additionnal hardware you can do everything. But I remember > something in the developer documentation (v 0.3, July 92) speaking of wait > states... > Anyhow, a 32 bit synchronous access in 4 cycles has 2 wait states in it. And > that, you cannot discuss it :-) Well if you are making "a 32 bit synchronous access in 4 cycles" on a 16 bit bus there can be NO WAIT STATES. To get 32 bits you must make two 16 bit accesses. Since each access requires 2 clock cycles, two accesses require 4 clock cycles. I think what you meant is that 4 clock cycles, to access 32bits, on a 16 bit bus is the equivalent of 2 wait states on a 32 bit bus. Brian, WS1S (ST/TT user) Bell Northern Research Research Triangle Park, NC
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Newsgroups: comp.sys.atari.st Path: arc1-ca.pugleaf.net!sparky!uunet!tcsi.com!iat.holonet.net!news.cerf.net!usc!cs.utexas.edu!hermes.chpc.utexas.edu!news.utdallas.edu!corpgate!crchh327!bnr.ca!grier From: grier@bnr.ca (Brian Grier) Subject: Re: 030 sync cycles (...) Sender: news@news.rich.bnr.ca (news server) Message-ID: <C1GzxH.9L3@news.rich.bnr.ca> Date: Tue, 26 Jan 1993 16:46:29 GMT References: <1993Jan22.135725.4674@ugle.unit.no> <1983@enst.enst.fr> Nntp-Posting-Host: 131.253.206.80 Organization: Bell Northern Research Lines: 27