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From: david@prism.UUCP
Newsgroups: net.micro.68k
Subject: Re: 68000 vs 6502 (!)
Message-ID: <7100003@prism.UUCP>
Date: Fri, 20-Sep-85 12:24:00 EDT
Article-I.D.: prism.7100003
Posted: Fri Sep 20 12:24:00 1985
Date-Received: Sun, 29-Sep-85 04:17:24 EDT
References: <151@uvicctr.UUCP>
Lines: 32
Nf-ID: #R:uvicctr:-15100:prism:7100003:000:1153
Nf-From: prism!david    Sep 20 12:24:00 1985





	Why not drop in 65802's to replace your 6502's?

	The 65802 is the 6502 pin-compatible version of the
	65816, the new 16-bit 6502.  The 65816 features 16 
	megabyte adressing, user registers that can be expanded
	from eight bits to sixteen, a sixteen-bit stack pointer,
	a relocatable zero page (now called the direct page), a block
	move instruction, and much more.  In its emulation mode,
	it emulates a 6502 down to the weird invalid addresses
	needed to operate the Apple disk II controller; in native
	mode, you already know over half the opcodes if you know how to
	program a 6502.

	If a 1MHz 6502 can keep up with an 8MHz 68000, what will happen
	when somebody builds a machine using a 4 or 5 MHz 65816 --
	which will be exactly four or five times faster, since the
	memory access cycle is the same as the clock cycle?  (The
	standard 65802/65816 part is 4MHz, and it's CMOS).

	For more information, contact the Western Design Center, 2166
	East Brown Road, Mesa, AZ, 602-962-4545 (it is also being
	sourced by GTE Microcircuits).

		David Eyes
		Mirror Systems, Inc.

		{cca, ihnp4, inmet, mit-eddie, wjh12} ...
				... mirror!prism!david