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Article #16124Looking for circuit to grab ISA bus port Reads, not just Writes
From: Don taylor
Date: Thu, 21 Jan 1993 08:25
Date: Thu, 21 Jan 1993 08:25
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Typical clone of an IBM ISA bus. It is easy enough to put together a latch to capture port writes. Getting the timing right to be able to catch port reads looks harder. In other words, what I am trying to do is add a small board that sits on the ISA bus and COMPLETELY TRANSPARENTLY latches bytes (or words) as they are READ from a port by the processor. Does anyone have an idea of how to do this? This doesn't have to be reliable enough to be a commercial product, but should be reliable enough to provide more information than frustration. Please reply by email if possible Thanks Don Taylor 503-235-6853 dont@klic.rain.com dont@pdaxs.techbook.com
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Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!destroyer!gumby!yale!mintaka.lcs.mit.edu!ogicse!psgrain!percy!nosun!klic!dont From: dont@klic.rain.com (Don taylor) Newsgroups: sci.electronics Subject: Looking for circuit to grab ISA bus port Reads, not just Writes Message-ID: <1993Jan21.082535.10632@klic.rain.com> Date: 21 Jan 93 08:25:35 GMT Article-I.D.: klic.1993Jan21.082535.10632 Distribution: na Organization: KLIC Lines: 21