[OpenBIOS] Adding to a definition

Tarl Neustaedter tarl-b2 at tarl.net
Fri Apr 13 19:49:10 CEST 2012

>> You can also use (patch) with the XT's if the words are not 
>> externally visible.
>> Steve
> I'm fairly sure that OpenBIOS don't implement either patch or (patch) 
> at the moment. If it's just a case of replacing one XT with another 
> within a word definition, then it shouldn't be too hard - or does it 
> do something more clever?

That's exactly what it does. If you look at the IEEE 1275 definition of 
"patch" and "(patch)", you see it has to do something a bit more 
carefully with numbers vs xt's - replacing "157" with "noop" requires a 
bit of finesse...

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