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TurboForth utilises the 16-bit zero wait-state RAM in the 4A console in order to increase performance of the most commonly executed words. The words below are all coded in assembly language for size and performance. They execute at approximately twice the speed of code that runs from the 32K memory expansion, which is on an 8-bit bus.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | |
| 830 | TF WORKSPACE | |||||||||||||||
| 831 | ||||||||||||||||
| 832 | DOCOL | NEXT | EX | |||||||||||||
| 833 | IT | BANK1 | RETB0 | |||||||||||||
| 834 | SPSTAT | RUN | ||||||||||||||
| 835 | ISR | ISRXIT | SW | |||||||||||||
| 836 | AP | LIT | X | X | ||||||||||||
| 837 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | ||
| 838 | X | X | DROP | OV | ||||||||||||
| 839 | ER | 1+ | 1- | 2+ | 2- | |||||||||||
| 83A | 2- | + | - | * | ||||||||||||
| 83B | * | 0BRANCH | ||||||||||||||
| 83C | FREE SPACE | |||||||||||||||
| 83D | ||||||||||||||||
| 83E | GPL WORKSPACE / FREE SPACE (active during KSCAN, interrupts & DSRLNK) |
|||||||||||||||
| 83F | ||||||||||||||||
X = Used by TI ROM/OS.
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