[time-nuts] Z38XX PFORTH interpreter question

Don Latham djl at montana.com
Thu Jun 20 04:49:14 UTC 2013


If you aren't sure a number is needed, put <number> <word> <.>  If a
number is needed, one will be on the stack, and the . will just pop
nothing. If the number is not needed, . will simply pop the unused
number. The stack will be left clean in either case. If I remember
right, that is . . .
Don
Mark C. Stephens
> Also Murray,
>
> Warning! don't attempt to run cal with an empty stack, it will go into a
> negative loop forever and you will have to reboot the clock to get
> control again.
> I haven't found cal in the words on a Z3815A but is present on the Z380x
> series.
>
>
> -marki
>
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Magnus Danielson
> Sent: Thursday, 20 June 2013 6:45 AM
> To: time-nuts at febo.com
> Subject: Re: [time-nuts] Z38XX PFORTH interpreter question
>
> Hi Murray,
>
> On 06/18/2013 04:10 AM, Murray Greenman wrote:
>> Hi,
>> Has anyone made further progress in understanding the PFORTH commands?
>
> I have figured out roughly what most of them do, but then again it is
> fairly obvious from their name.
>
> cal performs tempco calibration and you should put the length of your
> calibration time on the stack to let it know how many seconds you want
> to run.
>
> 100 cal
>
> will run calibration for 100 seconds (far to short).
>
>> I find with my Z3815A (with an E1938A hockey puck oscillator
>> installed) that the command 'puck' returns:
>>
>> a= -6.305066e-13 b= 0.000000e00 a/d = 1.600000e+01 puck communication
>> is alive puck warm= 1 puck EFC ADC err= 0
>> status1 byte= 1
>> status2 byte= 0
>>
>> What fun! I wonder what the three variables are and can one change
>> them?
>
> Cool!
>
> Will look at that command then.
>
>> As a separate but related question, I've just swapped out a failed MTI
>> 260 OCXO from this Z3815A and fitted in its place the older E1938A
>> hockey puck. The problem I have is that the EFC sense seems to be
>> reversed. Does anyone know how to change this, either by sending a
>> PFORTH command or otherwise? It would be great to get the Z3815A going
>> again.
>
> I will have to look at that. So many things is tuneable under the hood
> that it should be possible to fix.
>
> Will have to wire up my Z3815A and fire it up.
>
> Cheers,
> Magnus
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-- 
"Neither the voice of authority nor the weight of reason and argument
are as significant as experiment, for thence comes quiet to the mind."
De Erroribus Medicorum, R. Bacon, 13th century.
"If you don't know what it is, don't poke it."
Ghost in the Shell


Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304
Skype: buffler2
www.lightningforensics.com
www.sixmilesystems.com





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