PDP-11/84 (KDJ11-B) and Error 61

Mike Ross tmfdmike at gmail.com
Tue Feb 2 19:32:22 CST 2016


On Wed, Feb 3, 2016 at 2:28 PM, Jerome H. Fine <jhfinedp3k at compsys.to> wrote:
>>Ulrich Tagge wrote:Hi Glen,
>
>> [Snip]
>>
>> List/change parameters in the Setup table
>>
>>     A - ANSI Video terminal (1)          0=No,   1=Yes  = 1
>>     B - Power up  0=Dialog, (1)=Automatic, 2=ODT, 3=24  = 1
>>     C - Restart   0=Dialog, (1)=Automatic, 2=ODT, 3=24  = 1
>>     D - Ignore battery                   0=No,   1=Yes  = 0
>>     E - PMG 0-(7) 1=.4us, 2=.8, 3=1.6, 4=3.2,...7=25.6  = 7
>>     F - Disable clock CSR                0=No,   1=Yes  = 0
>>     G - Force clock interrupts           0=No,   1=Yes  = 0
>>     H - Clock  0=Power supply, 1=50Hz, 2=60Hz, 3=800Hz  = 1
>
>
> Does anyone have an idea as to how the choice of the 800Hz
> option was made?

I wondered about that too and blinked twice when I saw it. I could
only think of some aerospace or military application derived from
doubling a 400Hz power supply frequency... or maybe some lab
application that needs that clock...

Mike

http://www.corestore.org
'No greater love hath a man than he lay down his life for his brother.
Not for millions, not for glory, not for fame.
For one person, in the dark, where no one will ever know or see.'


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