Acorn IEEE488 interface

[Tony Duell]

> You;'ve just made me worried. I am going to have to try to find my unit 
> to see if it agrees with the circuit in Wireless World.

I needn't have worried...

I have found my 'Acron' IEEE-488 interface. It's the normal 'cheese 
wedge' case, but the intenral layout is not what you might expect. There 
is no PSU at the front as in the second processors, instead there's a 
metal plate screwed there. There's a PCB down the left side of the bottom 
(it looks to be approximately extended-length single-height Eurocard 
dimensions). There's a mains transformer screwed to the bottom of the 
case alongside it, with the normal switch and fuse on the back.

I have not compared the circuit in detail to the E&WW article. But the IC 
numbers all agree, and from what I can see the circuit does too.

-tony