Re: [Amforth-devel] Major redesign of the repository

[Matthias T. <mt...@we...>]

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Hans,

Hans H=FCbner schrieb:
>=20
> Something else:  How do you (as in everyone) handle bitwise I/O with
> amforth?

see lib/bitnames.frt. Thanks to Michael Kalus who has written the
documentation and made some subtle but very useful improvemnts to
my prior design.

> The AVR has the very useful SBI/CBI instructions that can be
> used to set and clear individual bits without affecting the state of
> the other bits in a port.  The bit number is coded into the
> instruction, so I am a bit at loss when it comes to defining a proper
> amforth word to do it.  Obviously, having cbi and sbi words ( bit port
> -- ) would be just great.  Any ideas?

The sbi/cbi work for the IO address _only_, so they are of very
limited use for a general ATmega design.

Matthias
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