Tandy 1000 RAM Expansion

Cheap and Simple expansion board that only requires
3 to 4 ICs and has been tested for EX and HX machines.

Designed by Adrian Black.

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⸢ Render ⸥                                                                                           ⸢ Circuit ⸥

Assembly

How to put the board together.

3 ICs

If you bypass the  74LS245  with
a jumper you can save one IC.

LED

If you don't want the LED, you
can leave it off as well as  R3 .

74HCT

If you choose to use the  74HCT , you will
just have to replace  R1  &  R2  with  10kΩ .

Files

Created with KiCAD v5.1.4-1.

The uploaded files are of  version 1.2 , with
the fixes, talked about in the Video, applied.