[Amforth] 16/32 Bit Fetch & Store.

[Martin N. <amf...@mg...>]

Hi,

I think that @ ! +! 2@ 2! d+! should disable interrupts on the AVR.
Although it's possible to code around a variable being changed by an
interrupt (using C@ C! for example), the 16-bit counter registers can't
be dealt with in a similar way. Section 17.3 of the datasheet
"Accessing 16-bit Registers" deals with all this. @ and ! do do the byte
accesses in the right order, but an interrupt using the 16-bit
registers associated with a particular counter will overwrite the "TEMP
(8-bit)" register (see Figure 17-4).

Cheers!

-- 
Regards,

Martin Nicholas.

E-mail: rep...@mg...