29F016 on 2A3B (2 Maskrom) Donor

Hi Folks!

i have several 2A3B PCB laying around and im asking myself if i can just put a 16Mbit TSOP in Maskrom1(U1) and leave Maskrom2(U2) empty?

For example: Parallel World? (LoRom 64k)

Will this work and is there any wiring needed on the 74LS?

Rgds Dario

You have to rewire the 74LS139 since 2A3B only has 32 pin MaskROMs.
You'd need to make up for A20/A21 decoding when using a TSOP Adapter with 36 pins.

You are right,thanks - so i could use 2 27801 and rewire!

Yea, that would be the better method for those boards.