DECmate III and Rainbow 100+

Tony Duell ard at p850ug1.demon.co.uk
Wed Feb 23 18:35:45 CST 2005


> 
> At 04:53 PM 2/22/2005, you wrote:
> > >
> > > At 09:02 AM 2/22/2005, you wrote:
> > > I prefer to think of it as a Z-80 with an 8086 coprocessor :)
> >
> >It's actuallly an 8088....
> >
> >-tony
> 
> I haven't looked under the hood on mine in ages :(  going to have to do 
> that again soon.... 

Well, it's a very easy machine to take apart into modules, you don't 
actually need any tools at all from what I remember....

It's also a very difficult machine to set up so you can actually probe 
the PCBs. I remember having the mainboard on my bench. the PSU 
upside-down alongside it (with the normal cable just managing to link 
them), the main switch/fan bracket (the one bit you do need a screwdriver 
to remove from the case) hanging alongside the PSU. But I managed to find 
the problem with the bus arbitration circuit....

-tony



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