Difference between revisions of "Z-machine versions"

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* Versions 1-6 Created by [[Infocom]] in the 1980s
 
* Versions 1-6 Created by [[Infocom]] in the 1980s
 
* [[Graham Nelson]] made some minor changes in the 1990s to allow for larger story files, creating versions 7 and 8 of the spec.  Most, if not all, modern [[Z-machine#Assorted_Z-machine_interpreters|Z machine interpreters]] support v7 and v8 story files.
 
* [[Graham Nelson]] made some minor changes in the 1990s to allow for larger story files, creating versions 7 and 8 of the spec.  Most, if not all, modern [[Z-machine#Assorted_Z-machine_interpreters|Z machine interpreters]] support v7 and v8 story files.
* Zzo38 has more recently created versions 9 and 10 of the spec, with a number of extensions allowing even larger story files, finally giving Z-machines XOR support, and many other changes.  These versions are not described in the 1997 [http://mirror.ifarchive.org/indexes/if-archiveXinfocomXinterpretersXspecification.html Z-machine specification]; the only known [[Z-machine#Assorted_Z-machine_interpreters|Z machine interpreters]] that support these versions are [[Aimfiz]] and [[Fweep]]
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* Zzo38 has more recently created versions 9 and 10 of the spec, with a number of extensions allowing even larger story files, finally giving Z-machines XOR support, and many other changes.  These versions are not described in the 1997 [http://mirror.ifarchive.org/indexes/if-archiveXinfocomXinterpretersXspecification.html Z-machine specification 1.0] nor in the 2006 [http://mirror.ifarchive.org/if-archive/infocom/interpreters/specification/ZSpec11.txt Z-machine specification 1.1]; the only known [[Z-machine#Assorted_Z-machine_interpreters|Z machine interpreters]] that support these versions are [[Aimfiz]] and [[Fweep]]
  
 
==XOR support==
 
==XOR support==

Revision as of 00:47, 14 January 2014

There are at least 10 different versions of the Z machine out there:

XOR support

v9 and v10 story files give Z-machines XOR support by defining the 2OP instruction 29 (1D in hex) as being BXOR, with works like BOR or BAND, but performs a binary exclusive OR operation. Note that Glulx has always had XOR support (via the "bitxor" operation).

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