Weirdly Deformed STAR WARS -- The Force is not yet with me :)

On Sun, 26 Oct 2003 21:25:56 -0500, you wrote:

>I'd suggest taking a stab at realigning your X and Y linearity controls.
>Once you adjust those properly, your diamond pattern will display crisp,
>even shaped diamonds. That will go a long way towards correcting the output
>your're seeing. Your test screen looked like the BIP was OK, but go back
>and check it carefully to make sure it's really in alignment.

        Which it wasn't, actually, but the BIP and X/Y linearity controls are
now about as good as they're going to get. (Any remaining nonlinearities
are, I'm pretty sure, due to the WG's pincushioning.)

>A friend, or a mirror is very handy here so you can see the display
>as you adjust the controls.

        Having the monitor out of the cabinet and sitting on the floor in front
of you works pretty good too. :)

        Anyway -- the controls are now adjusted, and the display looks a bit
better than it did, but objects on the screen are still deformed. However
-- NOW, the machine is giving me Mathbox errors in self-test (which it
wasn't doing, before -- go figure). The errors I'm getting are as follows:

DIVIDER ERRORS:
NNNN FFFF 4000 4000 4000 4018
NNNN FFFN 5555 4000 5555 555F
NNNN FFNF 2AAA 4000 2AAA 2ABF
NNNN FFNN 2AAA 2AAA 4000 4024
NNNN FNFF 5555 5555 4000 4006

NO MATRIX ERRORS

        Am I correct in deducing, after having looked over the schematic, that
the problem is somewhere in the collection of 74LSxxx chips which make up
the divider section, and that my PROMS and AM2901's are good, since I'm
only getting divider errors and not matrix errors?

        If so -- does anyone here understand the mathbox's operation well
enough to tell me exactly which chip is to blame, or should I just shotgun
all the 74LSxx's in that section and hope for the best? :)

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for progress!" ---(Kelvin Throop III)
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solarfox@DON'TMESSWITHtexas.net (Gary Akins jr.)
http://lonestar.texas.net/~solarfox
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Received on Thu Oct 30 20:14:07 2003