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From: paul@unisoft.UUCP (Paul Campbell)
Newsgroups: net.micro.apple
Subject: Re: Re: Undocumented 6502 Opcodes
Message-ID: <419@unisoft.UUCP>
Date: Sun, 10-Mar-85 15:19:51 EST
Article-I.D.: unisoft.419
Posted: Sun Mar 10 15:19:51 1985
Date-Received: Tue, 12-Mar-85 20:53:25 EST
References: <9@zurton.UUCP> <381@utai.UUCP>, <139@cvl.UUCP>
Organization: UniSoft Corp., Berkeley
Lines: 9



	Seriously this time .... the 6800 has a similar opcode which is
in there for chip testing ... when you execute it the chip goes into a strange
mode where its microcode loops cycling its address lines thru the whole
address space reading all of memory. The only way of getting out of this is
to reset the chip, maybe the HCF instruction is similar?

		Paul Campbell		ucbvax!unisoft!paul