[DSP-10] PLL locking and voltages at L21

[kd7ts]

>
>I had a look with the serial Diag progrm last night to see if the serial port was OK and this seems to have problems, the voltages this is supposed to give to alternate pins to see if it is running does not work correctly and maybe this is why U7 does not seem right. When i load the software UHF3 with the ezkit lite then run the UHFA i get these messages after 2 sets of bleeping
>
>
>Power10[]=627B:0004
>prrdat[]=62fc:0004
>dnorm[]=63fe:0004
>It_dnorm[]=6500:0004
>It_pwrdat[]=6581:0004
>pd16[]=6602:0004
>cwmbuf[]=6683:0004
>
>Downloading DSP pointers...
>table address = 0d82, Getting pointers...
>
>Error in obtaining dsp_ptr[37 [validity check).
>Read 0 00 (1234 56 proper)
>Filter design will not be available.
>hit enter to continue


Hi Chris,

HNY etc .. 

It apears you are getting closer. The error above seems to indicate that the UHFA program is having problems finding addresses in the UHF3 program. I have seen this every time when the EZKIT has not been reset. Things do run, but not every time, and some times not well. 

The most certain method of resetting is powering down the whole DSP-10 assembly, then back on. This should get a response from the EZKIT that EZKIT is is ready to ... I don't recall the exact message, but it has earned the title of song and dance. 

You MUST have this EVERY TIME before anything else. I think the red light in the EZKIT should be flashing at this point. I haven't been able to confirm the flashing light, having misplaced my original EPROM. However, if you cycle the power, I guarantee, that after the song and dance, the EZkit is ready for business. 

In the interest of trouble shooting I recommend using the EZLD program to load the UHF3.EXE into the EZKIT. It is not as fast as other methods, but has proven very robust.

The procedure then is to have a DOS system running with all the needed files in the same directory. 

at the prompt enter. EZLD  1 UHF3.EXE G then strike the enter key

The response from EZLD is an immediate line feed and a message that says """

DKE's EZLD v1.04 12/03/95 Forth-Inside

then some disk activity for a while then on the next line ''''''''

Loaded A:\UHF3.EXE
at address 0000

That's all you should see. It will be together like this:

DKE's EZLD v1.04 12/03/95 Forth-Inside
Loaded A:\UHF3.EXE
at address 0000

Nothing else, no screenfuls of  data scrolling by, nothing but these three lines.

If everything went well then....

type UHFA 1  then strike the ENTER key


the first step is important. If you see something additional below the "at address 0000" line, like 255 255 255 255, it indicates an error in loading UHF3

DKE's EZLD v1.04 12/03/95 Forth-Inside
Loaded A:\UHF3.EXE
at address 0000
255 255 255 255

the last line indicates some sort of error, there should only be three lines.

If you do not get a clean load of UHF3, then start over by resetting the EZKIT. If you continue loading UHFA after an error was indicated in UHF3 you will be in unknown territory, but in my experience it leads to not being able to get the pointer table.

I have assumed you are using COM1 from the A:\ drive, if you were using a directory on the C:\ drive named DSP, then it might be as follows.

DKE's EZLD v1.04 12/03/95 Forth-Inside
Loaded C:\DSP\UHF3.EXE
at address 0000

Additionally there was a modification to value of R108 in the data lines that changed timing of data. You may have done this, but the question needs to be asked. 

This is item 4 under "Latest Information for builders" found at http://www.proaxis.com/~boblark/dsp10.htm

4 - R108 should be 4.7K Ohms (not 470). Some combinations of U107 and U104 have been found to have the data line at U104 switching too early. These are cascaded shift registers and the timing is quite close. The R108 resistor change slows down the data line going to U104, making the timing less critical. (1 Dec 99)

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Some indication of your familiarity with DOS and computers might help me make these replies shorter. Was your first machine an Altair you built yourself ? You regularly program in assembly but prefer C++. Did it break your heart when DOS 6.22 was announced as the final deployment ?? Do you still use WIN 3.11 because you really like it ?? Can you recall all the major segments for the 8088 below 1 meg from organic memory ??

Some of the above is intended as humor !! But seriously how comfortable are you with this stuff ??  It takes me about 1 1/2 hours to get this reply together and sent. There is much detail I have forgotten over the years, such as Q4. I don't have a clue what that part is or what it does in the box. If you told me it is the VCO for the second LO, that would mean something and I would know what schematic sheet to look for.

73 Mike KD7TS