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From: rer@hpfcdc.HP.COM (Rob Robason)
Newsgroups: comp.sys.hp
Subject: Re: HP 9000/400 question
Message-ID: <5570469@hpfcdc.HP.COM>
Date: 14 Aug 90 23:37:37 GMT
References: <j902s89@Unify.Com>
Organization: HP Fort Collins, Co.
Lines: 11

wayne> pardon my ignorance, but why does the 040 break things worse
wayne> than the 030?  dont they both have separate instruction and data
wayne> caches?  the only difference that i know of is the fact the the
wayne> 030's caches are tiny (256 bytes for I & D) and therefor you are
wayne> not as likely to encounter problems.

My understanding is that the fetch of instructions doesn't look in the
data cache and hence instructions written there by self modifying code
are missed.

Rob