Multisim and Ultiboard

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RAM 256x8 simulation

Task is to simulate 256x8 RAM.
I tried something like this:
1.1.png

There was notification - "Placing a wire over a junction is not allowed." What's wrong there?
And what about schematics? Is it looks correct? 
Also.. I guess, WE and OE must never both be active at the same time.. so I have to use other switch?
 I add my Multisim project file as an attachment. Any suggestions to improve this simulation in the working version?
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Hi,

 

The I/O pins are bi-direction, they are used to write and read data.

 

Have a look at this link:

https://decibel.ni.com/content/docs/DOC-36569?prevContainerType=14&prevContainerID=100

 

There is a 2K8RAM in the TIL Family, this part is easier to use.

 

 

Tien P.

National Instruments
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