An A600 does not have blinking lights, nor switches. Its a smallish
box with no front pannel. Those disappeared from HP systems like
the 21MX series.
(The A600 is based on a LSI chip version of the 21MX machines)
In fact, machines line the 21MX series (2113, etc) have switches and lights,
but very few blink while the machine is running. Once the CPU enters the
run state the front panel leds display the contents of the S register which
is rarely changed by HP software.
If you run HP Basic, the extend and overflow lights will flicker for you, but
honestly, this is no blinkinlights machine (like a 2114,5,6, or something like a
PDP 11/40). You can write small loops to write to the S-reg and make the
machine ~look~ sorta like a true blinkinlights machine though.
If you have a 2113-style machine and think its power supply is bad, your
probably only missing a small plug on the back of the power supply.
Without this plug the machine powers up but the front panel will be locked
out after failing the power-on self test microcode. This is commonly mistaken
for a toasted power supply.
Check the back of the chassis at the rear of the power supply. There should be
3 connectors. One is the power controller input, another is the power controller
output. These can be ignored. The third connector is for a battery backup
unit. Unless you have the battery backup unit connected by its cable, you need
to jumper some pins to get your machine to power up correctly.
"R. D. Davis" wrote:
> On Thu, 19 Jul 2001, jos.mar wrote:
> > The above might be avaliable ( with some peripherals ) : it is worth saving ?
>
> If it's what I think it is, the answer is: yes! Grab it; nice find!
>
> > I could not find too much info in the net . Around 1980's I assume.
> > I don't even know if it is a mini or if it is microprocessr based...
>
> My HP-1000 is a mini with blinkenlights/switches... well, they would
> be blinkenlights if the PSU was alive and enabling their
> blinkability. :-)
>
> --
> Copyright (C) 2001 R. D. Davis The difference between humans & other animals:
> All Rights Reserved an unnatural belief that we're above Nature &
> rdd_at_rddavis.net 410-744-4900 her other creatures, using dogma to justify such
> http://www.rddavis.net beliefs and to justify much human cruelty.
Received on Wed Jul 18 2001 - 18:56:08 BST