Hello Wagner

I would be interested in such a program also! sounds like a great fix.


  thanks
     Andrew



---Wagner Lipnharski <wagnerl@EARTHLINK.NET> wrote:
>
> Brett, I have two little PC programs to disable and enable the
Pentium internal cache. With the
> internal cache disable, the Pentium 350 machine runs like a 80386
SLC40 :)...  if
> you are interested I can send them to you.  Some old hardware like
eprom programmers that runs
> timming loops got totaly confused and don't work with new and fast
mahcines, so I
> need to disable the internal cache.
>
> Wagner Lipnharski
> http://ustr.net
>
> > Brett Paulin wrote:
> >
> > Greetings Piclisters,
> >
> > a question for those of you with new fast PC's. (or knowledeable
in such things)
> >
> > Recently, I dusted off my Pic Programmer board.. (home made, a
variety of Tait, DonMcKenzie/
> and others hybrid) that was once working very happily on my old
Pentium 100 machine,
> > and attempted to program some 16F84's..  no go
> >
> > EVERY program I can find that supports the parallel port
programmers produces the same
> result.  Verify Failure at address 0, Config Fuses verify failure.
> >
> > Manually testing the hardware with Nigels Windows PicProg2 in
debug mode shows all the lines
> to be toggling and doing their thing correctly.  VDD, VPP, clock
data etc all behave
> > as expected.   No apparent damage to programmer, Voltages seem
correct.   But when a program
> or verify is attempted, it fails
> >
> > after a failed program cycle, read shows a single word being
changed to a psuedo random value
> >
> > Erase appears to work, in that after erasing, the single incorrect
word reverts to 3FFF
> >
> >
> > The only thing I can come up with is that with my recent upgrade
to a Celeron running at
> 450Mhz (and yes it works fine for everything else), something is too
fast for the timing
> > requirements of the PIC.  but seeing as how a friend has borrowed
my 'scope at the moment, I
> cant verify this right now.  I tried slowing the CPU back down to
300Mhz (its normal
> > speed), with no improvement in results.
> >
> > One side issue is that with old P100 machine, The programmer didnt
appear to want to work on
> a Card-based Parallel port but was quite happy on the onboard port..
 similair
> > symptoms.. static line tests showed all signals running OK,
programming failed.   I've tried
> it on both the Motherboard and card based Ports on the new machine
with no change in
> > result..
> >
> >
> > Thats about all I can tell you right now.   Can anyone let me know
if there have been
> similair problems with high speed machines and pic programmers  ??
> >
> > And a solution would be really nice too.. (Of course). B-)
> >
> > Thanks muchly.
> >
> > ---
> > Brett Paulin : Trance DJ Spock, Electronic Engineer & Gyrocopter
Pilot
>

_________________________________________________________
DO YOU YAHOO!?
Get your free @yahoo.com address at http://mail.yahoo.com