Zenith

From: awc <awc_at_dryden.lakeheadu.ca>
Date: Tue Sep 4 09:38:05 2001

Hi Tony,

The way it is set up is Zenith-89 act as a terminal, then the serial line
connected to a board with all those chips. floppy disk is connected to same
board too. That board has six serial lines, one to terminal, other to a
scanning head, another to a press, another to control vacuum etc. This beast
controls four color Heiderburg Press. This controller board has D70116D NEC
chip too. (I guess 8086 plus some NEC stuff).

Each color has a roller and ink bucket with 31 smaller buckets. With H-89
controller each bucket can move up or down. So on the paper you will get
darker or liter color.

With each graphic we get some kind of color bar on the side, what we do is
scan the color bar with special head and that can adjust the all four rollers
(i.e. 124 ink buckets).

This runs with hdos system. On the start up I get Winchester controller
present... msg.

            -------------- --------------- ---------------
-------------- -------------- ------------
           | H-89?19 | | controller | | Floppy
| | Vacuum | | scan head | | Press |
           -------------- ---------------- ---------------
-------------- -------------- ------------
                  |____________| | | |____________|
| |
                                              |
|_________________________| |

|________________________________________ |


I do not have clue about hdos. I know 8085/68000 assembler well. If can
read(get source) the program on the disk, I can plug Linux machine.

Thanks

anil



Tony Duell wrote:

> >
> > Hi All,
> >
> > I have a Zenith H-89 based computer control system which needs few ICs.
> > Any body know place to buy these?
> >
> > D765AC
>
> Aka 8272. This is a very common floppy controller chip used on a lot of
> older PC floppy controller cards. It is _not_ hard to find.
>
> > C8208 - CPU?
>
> DRAM controller?
>
> > C8087-1
>
> FPU for the 8086/8088 family.
>
> > WD2123-PL - I guess western digital disk controller.
>
> I thought it was a support device. A clock generator or data separator,
> possibly.
>
> Only one thing worries me. I don't think any of the above are used in the
> H89/Z90, the schematics for which are along side me. Are you sure it's
> not some other Zenith machine?
>
> -tony
Received on Tue Sep 04 2001 - 09:38:05 BST