NBA Hangtime to Maximum Hangtime

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Archived from groups: rec.games.video.arcade.collecting (More info?)

Quick question --

I know that an NBA Hangtime board can be upgraded to a Maximum
Hangtime board by swapping two chips -- but are these two chips
burnable? That is, is one a security chip?

Thanks!

-- Bruce

 

[Guest]

Archived from groups: rec.games.video.arcade.collecting (More info?)

Upgrading Hangtime to Max HT requires a new security PIC chip(not
burnable) and changing the 2 program ROM chips(burnable).

Has anyone figured out how to make replacement PIC's?