Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: $Revision: 1.6.2.16 $; site prism.UUCP Path: utzoo!watmath!clyde!cbosgd!ihnp4!houxm!mhuxt!mhuxr!ulysses!allegra!mit-eddie!think!prism!david 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