offlist------Re: Z-100 (was Heathkit H8 (new unbuilt) on ebay)

Jim E Neutron nanoman at
Thu Mar 16 06:58:09 CST 2006

Hi Chris,

What information on the Z-100 are you looking for.

The Z-100 computer was a great machine for its time.

S-100 slots for things like A/D/A and I/O cards
                                       Harddisk controller (20 MByte 
ST-225 - never thought I could fill it!).

Reprogram the video for 640 x 512 interlaced monochrome (of course 
you will need to create graphic character set).
Reprogram the Disk Drive for 96 TPI

Use a tether to connect a RAM chip for imaging (remove metal lid on 
ceramic package and etch the protective layer - play with the DRAM 
256K = 512x512 refresh rate.)


I have a copy of TT-04 rev 03 Zenith Technical Training Manual, which 
is a great reference for 8088/86 programming.

Another great reference is the PUP (Programmers Utility Pack) 8088/86 


At 12:04 AM 3/16/2006, you wrote:
> a lead on a Z100. Any images you can provide
>would be greatly apprecited. I have other
>pseudo-compatible images (Tandy 2000, NEC APC III,
>etc.) if youre interested.
>--- cctech-bounces at
><acme_ent at> wrote:
> > woodelf wrote:
> > > Well I did get one for a song as Z-100 seems to
>ring a bell,about 10 years
> > >  ago but I had to toss it since  it came with no
>DOS with it. It was a
> > > nice machine, but with no Internet to get a OS
>booted for it was useless.
> >
> > Ben, that's a shame :-(((  When I got mine from Joe
>Rigdon a
> > few years back it had all of the OS disks except for
> > which Don Maslin (MHRIP) was kind enough to provide.
> >
> > I partitioned the hard drive into thirds, and set it
>up for
> > dual-boot (ZDOS and CP/M-86).
> >
> > Unfortunately, the version of CP/M-85 Don sent me
>does not
> > support a hard drive.  I've never taken the time to
>patch it
> > for hard drive support, since I really like CP/M-86.
>  If I
> > ever do, I'll install it on the third partition.
> >
> > I made Teledisk images for all three of the Z-100
> > disks, so if anyone out there needs 'em I'll be glad
>to share.
> >
> > Glen
> > 0/0
>Do You Yahoo!?
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