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Article View: comp.sys.zenith.z100
Article #30

Z-100 tinkering

#30
From: Walter Koziarz
Date: Fri, 30 Jun 1989 10:43
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Fellow Z-100 persons,
 
A recent posting by Gern prompted me to try an experiment.  I tried placing
the files IBMDOS.COM and COMMAND.COM from an IBM version 3.21 of MS-DOS onto
a disk containing Z-100 version 3.10 MS-DOS.  The IBMDOS.COM was renamed
to MSDOS.SYS, COMMAND.COM was directly replaced and IO.SYS was untouched.
This 'mutant system' booted and ran most of the applications/tools tested.
Amonge those that did not run were FORMAT.COM, DISKxxxx.xxx, CHKDSK.COM,
and other disk system-intimate programs.  I am continuing experimentation
with this mutant.

Other preliminary experimentation (these experiments were conducted by Gern)
indicate that it may be possible to run a STOCK 8MHz, recent production (circa
1985) Z-100 at 10MHz reliably with a processor change and inclusion of a
GernWare (or similar) 'Turbo Board' containing a 30MHz oscillator.  I intend
to duplicate this experiment and will post my results as well.

One last point of interest to us, with a Z-100 running at 8.67MHz with an
8087, it is possible to perform floating point math at 120% of the rate of
an I(nferior) B(ut) M(arketable) P(reposterous) C(ontrivence) / A(ntiquated)
T(echnology) running at 8MHz WITH an 80287!!!! [PCMagazine BenchMark 4.02,
running under ZPC, no less!!!]
 
Walt K.
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From: koziarzw@LONEX.RADC.AF.MIL (Walter Koziarz)
Newsgroups: comp.sys.zenith.z100
Subject: Z-100 tinkering
Message-ID: <8906301043.AA00804@lonex1.radc.af.mil>
Date: 30 Jun 89 10:43:32 GMT
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