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'Problems with working 1684 Programmer on new Machi'
1999\02\11@094210 by Brett Paulin

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1999\02\11@101957 by Wagner Lipnharski

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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 :)...  i
f
you are interested I can send them to you.  Some old hardware like eprom program
mers 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 thing
s)
>
> 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 mach
ine,
> 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 be
have
> 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 psue
do random value
>
> Erase appears to work, in that after erasing, the single incorrect word revert
s 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 th
e 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 no
rmal
> speed), with no improvement in results.
>
> One side issue is that with old P100 machine, The programmer didnt appear to w
ant 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 chang
e in
> result..
>
>
> Thats about all I can tell you right now.   Can anyone let me know if there ha
ve 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

1999\02\11@110013 by Chad Bonner

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I would be interested in those programs as well.


At 10:17 AM 2/11/99 -0500, you 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
>

1999\02\11@115845 by goflo

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face
Hi Wagner

I'd like to have a copy of this software, if possible.
I've got several 80's gizmos which interface to 386's
parallel port, but won't talk to later PC's.

TIA, Jack

Wagner Lipnharski wrote:
>
> Brett, I have two little PC programs to disable and enable the Pentium interna
l 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 progr
ammers that runs
> timming loops got totaly confused and don't work with new and fast mahcines, s
o I
> need to disable the internal cache.
>
> Wagner Lipnharski
> http://ustr.net

1999\02\11@143152 by andrew abken

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  Hello Wagner

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


 thanks
    Andrew



---Wagner Lipnharski <spam_OUTwagnerlTakeThisOuTspamEARTHLINK.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
>

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1999\02\12@095547 by Mark Willis

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> Brett Paulin wrote:
>
> <snipped>
> And a solution would be really nice too.. (Of course). B-)
>
> Thanks muchly.
>
> ---
> Brett Paulin : Trance DJ Spock, Electronic Engineer & Gyrocopter Pilot

 My solution remains using an old 386 or 486 to program PICs and EPRoms
<G>  You can put the whole machine together for about $100 or so, if you
don't already have one;  And add a cheap monitor switch and you don't
even have to buy another monitor.  (Or use an older slower laptop, which
can work pretty well too.)

 (It's scary the number of spare old machines I have here, from an
embedded project that didn't "Go" due to the startup's having problems;
Anyone want an old AST 286?  or an old Compaq 386 laptop?  <G>)

 I figure I'll use them until they die, then take another spare out of
storage, then I can program while doing something else (Always needed,
here.)

 Mark

1999\02\26@134117 by goflo

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<SNIP>
> I have two little PC programs to disable and enable the Pentium
> internal cache... With the
> internal cache disabled, the Pentium 350 machine runs like a 80386
> SLC40 :)  Some old hardware ... does'nt work with fast machines, so
> I disable the internal cache...

This was recently posted to the list - The gentleman has not
responded to requests for more information - Perhaps someone
has insight into interfacing older devices to current machines?

Topical connection is I'm working up a PIC-based disk drive
emulator to expand the memory of some old TI palmtops for data-
logging purposes. These guys will talk to a 386, but not later...

Thanks, Jack

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