🚀 go-pugleaf

In article <PAR.90Nov16081344@hq.af.mil> par@hq.af.mil (Paul A. Reitelbach) writes:
>someone else wrote:
>
>> I have a Z100 that will not boot from hard drive or floppy.  Just turned it
>> on one day and no boot.  I am even unable to activate the ROM monitor (and g
>> the "finger" prompt).  Just a flashing cursor when I turn it on.  No other
>> activity.  Bad ROM? If so, where can I get a new chip?
>
>Have you tried taking all the boards out and setting them back in again?
>Sometimes this helps, because all the connections on the boards are not making
>good contact.

Reasonable advice for one of Zenith's vile clones of the I(nferior) B(ut)
M(arketable) P(reposterous) C(ontrivence)s; but not applicable to the
well-designed Z-100.  Removal of the Z-100's disk controller board (the DEFAULT
DEVICE CONTROLLER, as determined by switch S101)  should produce a 'DEFAULT
DEVICE CONTROLLER ERROR'.  if this doesn't occur, listen for one 'beep' at
power-up.  If one beep is heard, the 8085 is attempting to relinquish control
to the 8088; if NO beep then check in/around 8085 circuitry.  If one beep,
rather than two, check around 8088 and associated circuitry.  A copy of the
Technical Manual is a necessity.  New Monitor ROMs are (were, as of Summer
1989) available from ZDS.  Or, for approx $60 you can get version 3.0 monitor
from Bob Donohue; I don't recall his address, however.

Walt K.