Xref: utzoo comp.misc:1953 comp.sys.ibm.pc:12146
Path: utzoo!mnetor!uunet!husc6!bbn!rochester!PT.CS.CMU.EDU!B.GP.CS.CMU.EDU!Ralf.Brown@B.GP.CS.CMU.EDU
From: Ralf.Brown@B.GP.CS.CMU.EDU
Newsgroups: comp.misc,comp.sys.ibm.pc
Subject: Re: The New Chips
Message-ID: <2219a8ef@ralf.home>
Date: 17 Feb 88 14:36:31 GMT
Sender: netnews@PT.CS.CMU.EDU
Lines: 32
In-Reply-To: <3066@drivax.UUCP>


In article <3066@drivax.UUCP>, alexande@drivax.UUCP (Mark Alexander) writes:
}In article <864@PT.CS.CMU.EDU> ralf@B.GP.CS.CMU.EDU (Ralf Brown) writes:
}}In article <2037@codas.att.com> karthur@codas.att.com (Kurt_R_Arthur) writes:
}}}We got WordStar up and running under
}}}DOS 1.0 by changing a _single_ byte from a CP/M version.
}}}What may be even more amazing is the fact we had a legal copy of WordStar!
}}
}}I'll say it's amazing, since the 8080/Z80 has completely different opcodes 
}}from the 808x!  I don't suppose your legal copy happened to be source? :-)
}
}Maybe Mr. Arthur was referring to CP/M-86?  Ever heard of that?
}-- 
}Mark Alexander  ...{hplabs,seismo,sun,ihnp4}!amdahl!drivax!alexande

I've not only heard of it, I have a copy that was bundled with 
the Eagle PC I bought in '84.  If Mr. Arthur was indeed referring to 
CP/M-86 (which I haven't seen anything about for over two year, 
thus the assumption of CP/M-80), then I can believe it.  The 
change would be modifying an INT E0h into an INT 21h.

The 8086 will not run 8080/Z80 opcodes; however, it is simple to 
reassemble source code to produce 8086 opcodes from 8080 assembly 
language.  After that, either CP/M-86 or MSDOS could run the 
program (the wordprocessor bundled with the Eagle PC was about 
97% crossassembled from CP/M-80, the other 3% were BIOS interfacing 
for keyboard (INT 16h) and screen (INT 10h) access). 

--
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