Z-machine versions: Difference between revisions
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(These versions are not described in the 1997 [mirror.ifarchive.org/indexes/if-archiveXinfocomXinterpretersXspecification.html Z-machine specification]) |
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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 [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]] | * 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]] | ||
==XOR support== | ==XOR support== | ||
Revision as of 00:43, 14 January 2014
There are at least 10 different versions of the Z machine out there:
- 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 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 Z-machine specification; the only known Z machine interpreters that support these versions are Aimfiz and Fweep
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).