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TransWarp GS

Do you have one of the latest versions of the TransWarp GS card?

I have a card from 1989

It has GAL numbers:

Group of 2 GAL chips on top of card, 20 Pin
TWGS 1A-I
TWGS 2B-I   (this one has a white sticker label on it)


Group of 3 GALS, 24 pin, 
TWGS 3B-I
TWGS 4A-I
TWGS 5A-I

Group of 3 GALS, 20 pin
TWGS 6A-I
TWGS 7A-I
TWGS 8A-I

The Cache/ROM card is copyright 1989, ROM version TWGS1.5w 8S

I know that the 2B GAL is for doing DMA.....Does anyone know what the 
other GALs do?