Date   : Sun, 26 Feb 2012 23:59:40 +0000
From   : afra@... (Phill Harvey-Smith)
Subject: Acorn Electron Repair - Replace 6502 (unlikely)

On 26/02/2012 02:59, Rick Murray wrote:
> You'll need to ensure a replacement is pin compatible. I think a
> 65C02 will work okay (but note that games or such using illegal
> instructions would fail), not sure sure about the more recent WDC
> chips, best check a datasheet if not picking up an original.

WD65C02 has a mostly compatible pinout

pin    6502    65c02
1      VSS     Vector Base Pull (output)
5      n/c     Memory Lock (output)
36     n/c     Bus Enable  (input)

Of note is that pin 1 is an output on the WD chip so must not be 
connected to VSS. Also Bus Enable is active high so will need pulling up 
to +5V, as this pin should not be connected to anything on the Electron 
motherboard, it should be OK to connect a 10K resistor between this pin 
and VCC to get the required +5V.

Cheers.

Phill.

-- 
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !

"You can twist perceptions, but reality won't budge" -- Rush.