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How to keep resident only a part of the program (Developers)

posted by bretjohn Homepage E-mail, Rio Rancho, NM, 08.03.2022, 19:19

As far as to how much of the PSP you need to keep after the TSR is installed, the answer is usually 0. Except in very rare cases, the PSP is only used while the TSR is being installed but is not used by the TSR itself. So, you can overwrite the PSP with whatever you want. I've used the PSP for various different things in my TSR's, the most useful probably being as a TSR Stack (complicated TSR's should always provide their own stack space).

You do need to make sure you don't overwrite the PSP before the TSR is actually installed, though. That can be a little tricky in high-level languages like Pascal since you don't necessarily know exactly when or how the PSP is used.

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