Er, I don't think anyone answered your Qs.

The problem is NOT the P16PRO40. Its Microsoft. When you switched from
98SE to Win2K, Windows no longer allows control of the I/O pins. PICALLW
won't work on Win2K (never did for me).

I always use an old DOS166 for PICALL and P16PRO40. Still works fine, of 
course.

--Bob

Dave King wrote:

> I have a Qkit Kit96 aka P16Pro40.  When I first put it together about 2
> years ago I had a few quirks with the power system which I worked around.
> It worked wonderfully and did every Pic on the list.
>
> Fast forward after about a year of not using it I needed to program 
> some 508's,
> 509, and 675's all of which I had done quite successfully previously. 
> I managed
> to actually program about 25% of what I needed to do so I started 
> checking everything.
> Everything would appear to program then fail with a verify error at 
> 000h or some location
> close to the beginning. This was done using IC-Prog v0.15d as PicallW 
> was either not seeing
> the hardware or stopping right at the beginning of the program cycle.
>
> On the one end I have my old Acernote P166 Laptop running 98SE, cable 
> is good.
> I used Picallw and toggled all the bits and was getting good 5vdc 
> changes. I had previously
> used my 550mhz 98se desktop to program but I now have a 2.53ghz P4 
> machine running 2K Pro.
> I didn't use it as the port only seemed to toggle from 0 to ~3.3vdc.
>
> With the P16 connected to the cable and power applied via a 18.5vdc 1A 
> wall wart I was getting
> a fluctuation on the VPP voltage out of the 78L08. I should have seen 
> 13 but was getting
> 5ish until I tapped it with my meter at which point the power led 
> would visibly brighten and
> I would now see 13.04vdc. So I replaced the 78L08 with a spare I had. 
> Result was no change.
> Someone suggested checking the caps in the power section, so I 
> replaced those, no change.
>
> I noticed the VCC led was on slightly when it should have been dark. 
> So I replaced its BC557
> with one spare BC557 I had , no change.  I checked all the caps, and 
> resistor values next
> thinking one was off and causing the BC557 to "leak". They were all 
> ok. So I pulled all the
> BC557's out and replaced them with 2N3906 (with reversed pins) and 
> that solved the led
> being slightly lit. And most surprisingly it also solved the 13vdc 
> fluctuation out on the 78L08
> so I was now getting a very solid 13.04vdc right to the zip socket.
>
> So I repeated the checkout and everything checked out perfectly. BUT 
> it still won't program.
>
> Does anyone have an idea what to try next?
>
> Cheers
>
> Dave
>
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