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'COM84 programer trouble'
1999\10\14@232234 by Mike M

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Hey guys...i built a Com84 programmer, just a direct hookup right to the chip an
d it pulls Vdd programming voltage from the com port...Now, its all definitly wi
red correctly, however i run the com84 drivers, and then start PIP-02, and when
i hit veryify it says verify failed, and when i try to program sometimes the bar
goes from 0-100% real slow and i thought it was working but when ithit 100% it
said write failed.  im programing or trying to program a 16C84.  HELP!  I may ha
ve posted this message before but i never recieved a copy to myself so i assume
i addressed it wrong and it didnt go through thanks..

mike m.

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1999\10\15@173235 by John Mullan

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Most PC com ports do not supply enough voltage to put the chip into
programming mode.  My AMD K6 333 will not program via my bare bones
programmer.  However, many "Multi-IO" boards with com ports on them do
work.  I put one into my 486 and have no problem programming.  the
programming voltage has to be OVER 12volts.  11.9 will not work well.

Try your programming efforts on a few different computers and you will
likely find one that works.

John Mullan


{Original Message removed}

1999\10\15@175945 by Ernst Aardal

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HI!
You must use the slowdown software that you will find at the same wabpages
as pip and com84. With a 486 and a slow pentium (less than 90MHz) it is ok
without the slowdown software.
Ernst

John Mullan wrote:

{Quote hidden}

> {Original Message removed}

1999\10\17@222758 by Mike M

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Well ive done everything, i used the slowdown program and that didnt give me an
error with the verification proccess, and the read process went through i guess.
.since the chip is blank, but i didnt get any errors just put it like that.  HO
WEVER, i still cant program anything.  I tried adding a seperate 12.10V supply t
o the reset and swiching it i can not get this thing to work.  Has anyone ever a
ctually got this to work than can really help me??

I would just buy a real programmer but im a begginner and dont want to waste a f
ew hundred on something that i may not use on a permenent basis.

mike m.


On Fri, 15 Oct 1999 23:59:09 +0200 Ernst Aardal <spam_OUTernstTakeThisOuTspamAARDAL.COM> wrote:
{Quote hidden}

>> {Original Message removed}

1999\10\18@014509 by Don McKenzie

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Mike M wrote:
>
> Well ive done everything, i used the slowdown program and that didnt give me a
n error with the verification proccess, and the read process went through i gues
s..since the chip is blank, but i didnt get any errors just put it like that.  H
OWEVER, i still cant program anything.  I tried adding a seperate 12.10V supply
to the reset and swiching it i can not get this thing to work.  Has anyone ever
actually got this to work than can really help me??
>
> I would just buy a real programmer but im a begginner and dont want to waste a
few hundred on something that i may not use on a permenent basis.

The com84 type programmer is nice and small and sweet when it works.

Why don't you add a 7407 buffer, a few transistors, a db25 connector,
pull out the db-9, and other gear, and call it a parallel port
programmer.

there are zillions of hardware and software combos to run the 84 (and
most of the others) from a simple parallel port driven circuit.

P16PRO PICMicro Programmer Software lite version free.
http://www.dontronics.com/p16pro.html

http://www.dontronics.com/download.html
heaps of free software that works.

free circuit.
http://www.dontronics.com/dt001.html
http://www.dontronics.com/diyk96.html

David Tait links, again free software and hardware circuits.
http://www.dontronics.com/dtlinks.html

But if you need reliability in an RS-232 programmer, I suggest you get
something that has a micro on board, like Jim's Newfound programmers, or
a PICstart +.

Don McKenzie  .....donKILLspamspam@spam@dontronics.com http://www.dontronics.com

Don's Download Dungeon:   http://www.dontronics.com/download.html
Australian Electronics Ring http://www.dontronics.com/aering.html
Win $500USD Cash. Micro design contest:  http://www.simmstick.com

1999\10\18@220917 by Mike M

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I have tried parallel programmers too ive tried like 4 different versions of eac
h, serial and parallel and many many different software types and versions and n
uthing works.

On Mon, 18 Oct 1999 15:43:48 +1000 Don McKenzie <donspamKILLspamDONTRONICS.COM> wrote:
>Mike M wrote:
>>
>> Well ive done everything, i used the slowdown program and that didnt give me
an error with the verification proccess, and the read process went through i gue
ss..since the chip is blank, but i didnt get any errors just put it like that.
HOWEVER, i still cant program anything.  I tried adding a seperate 12.10V supply
to the reset and swiching it i can not get this thing to work.  Has anyone ever
actually got this to work than can really help me??
>>
>> I would just buy a real programmer but im a begginner and dont want to waste
a few hundred on something that i may not use on a permenent basis.
{Quote hidden}

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1999\10\18@221744 by Don McKenzie

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Mike M wrote:
>
> I have tried parallel programmers too ive tried like 4 different versions of e
ach, serial and parallel and many many different software types and versions and
nuthing works.
>
> On Mon, 18 Oct 1999 15:43:48 +1000 Don McKenzie <EraseMEdonspam_OUTspamTakeThisOuTDONTRONICS.COM> wrote:
> >Mike M wrote:

In that case, I can only suggest you get an assembled and tested unit.
Have a look on my links page, you will find Octavio's Propic-2 and Jim's
WArp-13 very useful, or a PICstart+ from MC.

Don McKenzie  donspamspam_OUTdontronics.com http://www.dontronics.com

Don's Download Dungeon:   http://www.dontronics.com/download.html
Australian Electronics Ring http://www.dontronics.com/aering.html
Win $500USD Cash. Micro design contest:  http://www.simmstick.com

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