Re: Processor ISAs

From	"wolfgang kern" <nowhere@never.at>
Newsgroups	alt.os.development
Subject	Re: Processor ISAs
Date	2016-04-02 10:59 +0200
Organization	KESYS-development
Message-ID	<ndo1sl$hgj$1@gioia.aioe.org> (permalink)
References	(1 earlier) <4b75c026-8b71-4072-841c-dc28782240b7@googlegroups.com> <2a274749-c9d5-4091-81d7-a2cb2a298d6d@googlegroups.com> <ndle1l$2s2$2@dont-email.me> <ndllam$utu$1@gioia.aioe.org> <ndmq68$jmo$1@dont-email.me>

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James Harris wrote:

>>> Lucretia wrote:
>>> ...
>>>> As for Z80, it was designed to be binary compatible with 8086 so can
>>>> run CP/M binaries meant for that processor.

>>> Do you mean the Z80 was compatible with the 8080 (not the 8086)?

>> they aren't compatible either...
 
> I wrote from memory. But Wikipedia seems to agree:
 
> Faggin designed the instruction set to be binary compatible with the 
> Intel 8080[6][7] so that most 8080 code, notably the CP/M operating 
> system and Intel's PL/M compiler for 8080 (as well as its generated 
> code), would run unmodified on the new Z80 CPU.
> 
> https://en.wikipedia.org/wiki/Zilog_Z80

Thanks. Yes, I checked my old manuals from 1976 and found many 8080 
opcodes identical to the Z80 ones, but not all of them.

So some 8080 code would run on Z80, while the opposite might not work 
because Z-80 got much more instructions.
__
wolfgang

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Thread

Processor ISAs "Bill Cunningham" <billcun-remove-@suddenlink.net> - 2016-03-24 13:58 -0500
  Re: Processor ISAs "Alexei A. Frounze" <alexfrunews@gmail.com> - 2016-03-24 13:50 -0700
    Re: Processor ISAs "Bill Cunningham" <billcun-remove-@suddenlink.net> - 2016-03-24 17:31 -0500
  Re: Processor ISAs Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-03-24 19:17 -0400
  Re: Processor ISAs "Benjamin David Lunt" <zfysz@fysnet.net> - 2016-03-24 17:50 -0700
    Re: Processor ISAs "Bill Cunningham" <billcun-remove-@suddenlink.net> - 2016-03-25 13:21 -0500
  Re: Processor ISAs "wolfgang kern" <nowhere@never.at> - 2016-03-25 08:24 +0100
    Re: Processor ISAs Herbert Kleebauer <klee@unibwm.de> - 2016-03-25 12:43 +0100
  Re: Processor ISAs Lucretia <laguest9000@googlemail.com> - 2016-03-28 06:45 -0700
    Re: Processor ISAs Lucretia <laguest9000@googlemail.com> - 2016-03-28 06:54 -0700
      Re: Processor ISAs "wolfgang kern" <nowhere@never.at> - 2016-03-28 22:40 +0200
        Re: Processor ISAs Lucretia <laguest9000@googlemail.com> - 2016-03-29 13:00 -0700
          Re: Processor ISAs "wolfgang kern" <nowhere@never.at> - 2016-03-30 11:17 +0200
      Re: Processor ISAs James Harris <james.harris.1@gmail.com> - 2016-04-01 10:15 +0100
        Re: Processor ISAs "wolfgang kern" <nowhere@never.at> - 2016-04-01 13:16 +0200
          Re: Processor ISAs James Harris <james.harris.1@gmail.com> - 2016-04-01 22:48 +0100
            OT: processor binary- or pin-compatibility, was [Re: Processor ISAs] Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-04-01 21:22 -0400
              Re: OT: processor binary- or pin-compatibility, was [Re: Processor ISAs] Rod Pemberton <NoHaveNotOne@bcczxcfre.cmm> - 2016-04-01 21:26 -0400
              Re: OT: processor binary- or pin-compatibility, was [Re: Processor ISAs] Bob Eager <news0006@eager.cx> - 2016-04-02 08:46 +0000
                Re: OT: processor binary- or pin-compatibility, was [Re: Processor Bogus@Embarq.com (Steve) - 2016-04-03 12:31 +0000
                Re: OT: processor binary- or pin-compatibility, was [Re: Processor Morten Reistad <first@last.name.invalid> - 2016-04-03 14:44 +0200
                Re: OT: processor binary- or pin-compatibility, was [Re: Processor Bob Eager <news0006@eager.cx> - 2016-04-03 18:53 +0000
                Re: OT: processor binary- or pin-compatibility, was [Re: Processor Bogus@Embarq.com (Steve) - 2016-04-03 20:07 +0000
                Re: OT: processor binary- or pin-compatibility, was [Re: Processor Bob Eager <news0006@eager.cx> - 2016-04-03 21:18 +0000
                Re: OT: processor binary- or pin-compatibility, was [Re: Processor "J. Clarke" <j.clarke.873638@gmail.com> - 2016-04-03 20:20 -0400
                Re: OT: processor binary- or pin-compatibility, was [Re: Processor "J. Clarke" <j.clarke.873638@gmail.com> - 2016-04-03 20:17 -0400
                Re: OT: processor binary- or pin-compatibility, was [Re: Processor pechter@pechter.dyndns.org (William Pechter) - 2016-04-04 15:53 +0000
              Re: processor binary- or pin-compatibility, was [Re: Processor ISAs] "Charles Richmond" <numerist@aquaporin4.com> - 2016-04-04 17:24 -0500
                Re: processor binary- or pin-compatibility, was [Re: Processor ISAs] Bob Eager <news0006@eager.cx> - 2016-04-04 23:08 +0000
                Re: processor binary- or pin-compatibility, was [Re: Processor ISAs] Bogus@Embarq.com (Steve) - 2016-04-05 17:43 +0000
                Re: processor binary- or pin-compatibility, was [Re: Processor ISAs] Ahem A Rivet's Shot <steveo@eircom.net> - 2016-04-05 19:15 +0100
            Re: Processor ISAs "wolfgang kern" <nowhere@never.at> - 2016-04-02 10:59 +0200

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