[vcf-midatlantic] Workshop report
mloewen at cpumagic.scol.pa.us
Tue Jul 10 13:54:06 EDT 2018
In the "Notes" section of this page, there are two front panel programs and
instructions for entering them:
In order to power on the system:
1. Turn on the power strip behind the rack (left rear as you look at it).
2. Retrieve the front panel key from the lock box.
3. Use the key to open the front panel, then turn on the white breaker-switch
on the power supply:
4. Close the panel. The register LEDs should count up in binary during the
5. When the self-test is complete, you may enter the program. Be GENTLE with
the front panel switches!
The instruction codes are in octal. The display register is laid out as 6
octal numbers, with the leftmost (15, MSB) containing only one bit. The
registers are selected by the horizontal left-right button under the register
To power off the system, press HALT, then open the panel and turn off the
white breaker. Finally, turn off the power strip.
On Tue, 10 Jul 2018, Drew Notarnicola wrote:
> Is there a write up somewhere on the HP and Univac? I'd like to be able to
> demo them as well.
> On Mon, Jul 2, 2018 at 2:12 PM, Mike Loewen via vcf-midatlantic <
> vcf-midatlantic at lists.vcfed.org> wrote:
>> On Mon, 2 Jul 2018, Evan Koblentz via vcf-midatlantic wrote:
>> - Mike Loewen worked on VCF's Zorba portable computer. It needs more TLC
>>> than he could do at the workshop, so I let him take it home for further
>>> repair. Mike got his own HP-3000 working! Exciting stuff.
>> I also repaired a broken toggle switch on the HP 2117F in the museum
>> and showed Bill how to enter and run a quick demo from the front panel.
>> Mike Loewen mloewen at cpumagic.scol.pa.us
>> Old Technology http://q7.neurotica.com/Oldtech/
Mike Loewen mloewen at cpumagic.scol.pa.us
Old Technology http://q7.neurotica.com/Oldtech/
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