Mike - I thought it was a mod to the lamp driver logic for any WPC game?
Oh?? I read it as a software mod to the program in the eproms???
Yeah it is (logic).
The way I read it - the lamp drive logic/code is common to all WPC titles. (Where he talks about the strobe timing.)
Edit: quote from link at top.
How do you know if your game rom has the old or updated driver code?
Any WPC pin produced from 1996 onward will have the updated driver code.
Williams designers also updated the driver code for a number of popular games produced before 1996. Some examples of earlier games with updated ROMs are:
AFM rev 1.13
WH2O rev LH-6
TZ rev 9.4H
It's changing how the CPU talks to the lamp matrix - You need to compare the 2 programs he has on there (CFTBL & MB) - they have the differences he is talking about.
I haven't done this crap since high school - but it would be relatively simple to download the latest ROM for your machine (Thanks Wayneo), then patch the updated code - then burn yourself a new ROM? (Are you listening Beak?) 
Just email the guy Mike - I am sure he would help you out on the quiet? 
I know what to do next silly, lol
when i get around to it i will burn the patched version of the rom and put it in my next gen.
after this is done i will up load a video to youtube with the original rom and the patch rom both, with leds installed
The led ghosting is so annoying.
If it all works then i will be happy to supply patched roms via P.M. & email
