Difference between revisions of "83Plus:OS:Memory Layout"
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Revision as of 00:05, 11 May 2005
Memory Layout
This table describes how the RAM is organized.
| Address | Description |
|---|---|
| appData-userMem | System RAM: Used by the OS to store various pointers, settings, buffers, etc. |
| userMem-(tempMem) | User Memory: This is where all variables are stored. |
| (tempMem)-(FPBase) | Temp Memory: This is where the OS stores temporary variables. |
| (FPBase)-(FPS) | Floating Point Stack: A LIFO stack for floating point number (or variable names). |
| (FPS)-(OPS) | Free RAM. |
| (OPS)-(OPBase) | Operator Stack: A LIFO stack used to parse expressions and to store return information when a TI-Basic program is called from another TI-Basic program. TI won't tell anything about this. |
| (OPBase)-(pTemp) | Variable Allocation Table (VAT) for temporary variables. |
| (pTemp)-(progPtr) | Variable Allocation Table (VAT) for programs,appvars,groups and lists with variable length names. |
| (progPtr)-symTable | Variable Allocation Table (VAT) for all variables with a fixed name: reals, strings, ans, functions, matrices, etc. |
| symTable+1 - FFFF | Hardware Stack |
