MV1A PALs

The MVS boards have two [PAL] PAL20V8H-15 chips which are used to provide some of 's functions. If any of them fails, the board certainly won't start up.

They can be replaced with new or working chips programmed with the following JEDEC files:

=SNK1A= Does address decoding.



JEDEC file:

=SNK1B= Generates the signal.

The CN2* inputs are probably connected to the cartridge ROM speed configuration pins (ROMWAIT, PWAIT...)



JEDEC file: