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- Drawfile
-
- PCB layout of a ARM3 adapter for
- older Acorn machines with ARM2
- processor.
-
- Desolder the ARM2 socket and
- replace it with a PGA socket.
-
- Etch the 2 PCBs. The smaller one is
- the adapter from the new PGA on the
- motherboard to the main PCB.
- The main PCB is a double sided one.
- You need:
- 1 x ARMIII CPU with socket
- 1 x Oszillator 2xCPU clock
- 1 x 74(ACx,F)74 with socket
- Some Condensors 10uF,10 Volts or more
- Some Ceramic Condensors
- Connectors for joining the two PCB's
- Connectors for the adapter PCB to connect
- to the motherboard CPU socket.
-
-
- My ARMIII adapter works now for over
- 5 years without problems.
-
- You can contact me:
- W. Kleinert
- Mariahilfstr.22A
- 81541 MŴnchen
- GERMANY
- email:
- 089661367-0001@tonline.de
-
-
-