Reply to post: Re: Power line.

Picking apart the circuits in the ARM1 – the ancestor of your smartphone's brain

Anonymous Coward
Anonymous Coward

Re: Power line.

It's always been possible to power CMOS processors (and CMOS logic) from glue logic via their I/O port ESD protection diodes, it's just a feature of ESD protection in CMOS chips so it's not specifically a shining example of low power chip design.

Especially when you're hooking them up to logic chips that are capable of supplying tens of milliamps per pin like those used in the Beeb, even the venerable 6502 could be run that way if by some oversight you managed to forget to connect the power pin.

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