Difference between revisions of "Category:83Plus:OS:Operator Stack"
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Latest revision as of 11:39, 3 December 2020
Synopsis
Official Name: OPS
Memory Address: 9828h
Length: 2 bytes
The operator stack is defined between (OPS) and (OPBase). The OS uses this area for storing information for conditional statements and loops in TI-BASIC.
Comments
Due to extremely poor programming in the OS, it is the cause of the well-known memory leaks which can occur if a programmer uses a Goto statement within a loop or an If:Then statement. In a nutshell, it moves the OPS and FPS by nine bytes every time a push to each occurs, which happens when a conditional is entered. This can cause a slowdown (slowly becomes more to move) and memory leaks (the nine bytes added above). The FPS are not accounted for, or are 'leaked'.
Very little is currently known about the OPS since TI has not documented it, but research is underway.
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