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Difference between revisions of "SCI/Specifications/SCI virtual machine/The Sierra PMachine"
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SCI/Specifications/SCI virtual machine/The Sierra PMachine (view source)
Revision as of 21:30, 7 January 2009
, 21:30, 7 January 2009→=Dispatch addresses: -- Fix formatting
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Relative addresses are signed values. | Relative addresses are signed values. | ||
===Dispatch addresses== | ===Dispatch addresses=== | ||
The <tt>callb</tt> and <tt>calle</tt> instructions take a so-called dispatch index as a parameter. This index is used to look up an actual script address, using the so-called dispatch table. The dispatch table is located in script block type 7 in the script file. It is a series of words - the first one, as in so many other places in the script file, is the number of entries. | The <tt>callb</tt> and <tt>calle</tt> instructions take a so-called dispatch index as a parameter. This index is used to look up an actual script address, using the so-called dispatch table. The dispatch table is located in script block type 7 in the script file. It is a series of words - the first one, as in so many other places in the script file, is the number of entries. | ||