[NTLK] Lost factory calibration

[NewtonTalk]

> This unit requires immediate repair. Factory calibration has been lost.

Temporarily putting an eMate ROM in isn't going to fix your problem. At
least putting a 2x00 ROM in my eMate didn't fix my problem ages ago when I
tried this. My eMate was successfully set back to factory conditions, but
the message still appeared. Which is hardly surprising, since this
information is specific to the mainboard and must never be changed. This is
why it is called "factory calibration"...

I dimly remember that a long time ago I was able to fix this problem on an
eMate using the "K-Diags Card". The test program on it has a button that,
when pressed, will write default factory calibration data to the Flash
memory. It must be installed on a memory card, and it'll start automatically
if the device is reset. Once started, K-Diags looks like this:

<https://www.flickr.com/photos/pablo_marx/8386069498>

Theoretically K-Diags will work with a 2x00, too, but it'll be a tad
cumbersome to use it. This is because K-Diags writes directly to the screen
memory, which is layed out differently between eMates and MP2x00s. The
result is that on a 2x00 it appears scrambled:

<https://www.flickr.com/photos/pablo_marx/8351773708/>

If you hold your mouse over portions of the scrambled info, a little popup
will appear that'll tell you what approximately it'll do when you click it.
 
Having an eMate to practice will certainly help, but I guess these days
you'd be able to feed this card into Einstein and practice on your desktop
computer. With a ROM dump of an eMate with K-DIAGS installed (which I have),
Einstein should boot directly into K-Diags.

Before you try it on your 2x00, though, be aware that K-Diags directly
writes to the hardware and expects to be running on an eMate, not on a 2x00.
Bad things may happen.

Below is some advice Steve White sent me a long time ago on how to copy the
K-Diags card on a 2x00. Maybe this'll help.

Good luck! If you can't get it to work, I can probably send you a working
mainboard.

Frank

--------------------------------

1) I cold-boot the card on an MP2000, wait for the loud beep and garbled
screen (see above flickr link).  I eject the K-Diags card, and insert the
linear flash card I want the copy of K-Diags to go onto into the top PCMCIA
slot. 

2) I hold the MP upside down - so that the Apple logo is further away from
me.  I try to calibrate the stylus - touch one corner, touch the other
corner.  

3) This gets it into the main menu, which will still be garbled.  If you
touch and hold the stylus at the top center of the screen, and slowly move
it down - as if you were trying to draw a line - the menu boxes will turn
black when your stylus is "inside" them, and go back to white when your
stylus is "outside" of it.  Sometimes this requires a little horizontal
movement as well - it all depends on the initial calibration.  

The goal of this is to get the last (bottom-most) menu box to turn black -
that's the "IMAGE TO PCMCIA" menu box.  When that goes black, lift the
stylus, and it starts copying it onto a linear flash card in the top PCMCIA
slot.