$CSB211@LSUVM.BITNET (mark orr) (05/07/90)
IN JEREMY MERENESS'S MESSAGE: >YOW! IS THIS THING STILL PRODUCED? CAN ANYONE GET A LOOK AT THE THING? >ANY SPECS ABOUT REGISTERS, CLOCK SPEEDS, DATA BUSSES, THAT KIND OF >THING??? WOULD 65816 BINARIES COMPLETELY BOMB WITH THIS THING? COME TO THINK OF IT - 65816 INSTRUCTION PROBABLY WOULD NOT WORK (THOUGH I DON'T KNOW THIS FOR CERTAIN) SINCE THIS IS A RISC CHIP THAT WE'RE TALKING ABOUT. (FOR THE UNINITIATED, RISC STANDS FOR REDUCED INSTRUCTION SET COMPUTER - A RISC IS A CHIP DESIGNED WITH A SMALLER SET OF INSTRUCTIONS (THOUGH AS I SAID THE ARM HAS ALL THE INSTRUCTIONS OF A 6502 AND THEN SOME) WHICH EXECUTE IN ONE CYCLE, REQUIRING LARGER PROGRAMS TO ACCOMPLISH THE SAME TASK, BUT EXECUTING PROGRAMS AT A MUCH FASTER RATE. TYPICAL RISCS ARE THE INTEL 80860, MOTOROLA 88000, ADVANCED MICRO DEVICES 29000, AND SUN'S SPARC. ALL RISCS HAVE HIGH PERFORMANCE: THE 80860 RUNS AT OVER 20 MIPS, THE 88000 RUNS AT AROUND 17 MIPS, ETC. AN ALMOST ALL OF THEM ARE THIRTY TWO BIT (THE RISC CONCEPT IS A RELATIVELY NEW ONE) THE DESIGNATION RISC IS GIVEN TO DISTINGUISH THESE CHIPS FROM CISC'S (COMPLEX INSTRUCTION SET COMPUTER) WHICH ARE TYPIFIED BY LARGE INSTRUCTION SETS (LIKE THE 680XX, 80X86, ETC.) THE DESIGN OF THE 65816 FITS MORE INTO THE CISC MOLD THAN IT DOES IN THE RISC MOLD. (RISCS ARE USUALLY FABRICATED WITH THE TRANSISTORS PACKED VERY TIGHTLY - THE ARM IS FABRICATED IN 2 MICRON CMOS - AS THE ORIGINAL MOSTEK DESIGNERS COULD NOT DO WITH THE ORIGINAL 6502) SO WHAT! I'VE BEEN HAPPY CODING FOR THE 6502 (AND LET'S NOT FORGET THE 68K) FOR YEARS. IF WORSE CAME TO WORSE AND YOU GUYS WOULDNT GIVE UP YOUR 65816'S, ONE COULD EVISION A SYSTEM CONTAINING BOTH 65816'S AND ARM'S, THE 65816 PASSING THROUGH TO THE ARM INSTRUCTIONS THAT IT COULD PERFORM FASTER (THAT WOULD BE REALLY COMPLECATED THOUGH) BUT FOR 5000 DHRYSTONES/SEC IT WOULD BE WORTH IT. MARK ORR | "I LIKE TO DANCE $CSB211@LSUVM.SNCC.LSU.EDU | I LIKE THE BEAT FUNKY @LSUVM (BITNET) | I'M SPUNKY (MY PASSWORD WILL BE OFFLINE | I LIKE MY OATMEAL LUMPY" IN ABOUT A WEEK...DONT MAIL | - DIGITAL UNDERGROUND ANYTHING DIRECT TO ME, OK) | ------------------------------ "IT WORKS, BUT IT DOESN'T WORK THE WAY I WANT IT TO WORK." __________________________________________________________________
cs122aw@ux1.cso.uiuc.edu (Scott Alfter) (05/07/90)
In article <9005062325.AA18438@apple.com> $CSB211@LSUVM.BITNET (mark orr) writes: >COME TO THINK OF IT - 65816 INSTRUCTION PROBABLY WOULD NOT WORK >(THOUGH I DON'T KNOW THIS FOR CERTAIN) SINCE THIS IS A RISC CHIP >THAT WE'RE TALKING ABOUT. (FOR THE UNINITIATED, RISC STANDS FOR.... Man, things are noisy around here. Would you please stop screaming? (BTW, before you get me for eating up bandwidth, he said to not mail stuff to him. So there. :-P ) Scott Alfter------------------------------------------------------------------- Internet: cs122aw@ux1.cso.uiuc.edu _/_ Apple II: the power to be your best! alfter@mrcnext.cso.uiuc.edu / v \ saa33413@uxa.cso.uiuc.edu ( ( A keyboard--how quaint! Bitnet: free0066@uiucvmd.bitnet \_^_/ --M. Scott, STIV