DOS ain't dead - How to keep resident only a part of the program

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

posted by tkchia , 08.03.2022, 14:20

Hello Laaca, hello tom,

> > Is it safe to perform the
> > relocation not to PSP+256 but to PSP+128? Or to PSP+0?
> PSP+80 should be enough as you probably don't use FCB's, and have used your
> command line (@PSP+128) a long time ago.

Actually, if the program does not use FCBs, one can probably throw away everything above PSP:0x5c (where the first default FCB starts).

(Or perhaps even everything above PSP:0x50. There is a "int 0x21; retf" sequence at PSP:0x50, but other than that there is nothing between PSP:0x50 and PSP:0x5c.)

Thank you!

---
https://gitlab.com/tkchia · https://codeberg.org/tkchia · 😴 "MOV AX,0D500H+CMOS_REG_D+NMI"

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Complete thread:

How to keep resident only a part of the program - Laaca, 14.08.2021, 07:31 (Developers)
- How to keep resident only a part of the program - tkchia, 14.08.2021, 08:49
  - How to keep resident only a part of the program - Laaca, 14.08.2021, 10:32
    - How to keep resident only a part of the program - tom, 14.08.2021, 11:40
      - How to keep resident only a part of the program - RayeR, 14.08.2021, 15:49
        How to keep resident only a part of the program - Laaca, 14.08.2021, 20:18
        How to keep resident only a part of the program - RayeR, 16.08.2021, 03:22
  - How to keep resident only a part of the program - tom, 14.08.2021, 11:28
  - How to keep resident only a part of the program - ecm, 15.08.2021, 13:47
    - How to keep resident only a part of the program - bretjohn, 27.08.2021, 21:22
- How to keep resident only a part of the program - marcov, 14.08.2021, 13:18
- How to keep resident only a part of the program - CandyMan, 27.08.2021, 17:46
- How to keep resident only a part of the program - bretjohn, 27.08.2021, 21:47
- How to keep resident only a part of the program - Laaca, 08.03.2022, 12:24
  - How to keep resident only a part of the program - tom, 08.03.2022, 12:51
    - How to keep resident only a part of the program - tkchia, 08.03.2022, 14:20
      - How to keep resident only a part of the program - bretjohn, 08.03.2022, 19:19
  - How to keep resident only a part of the program - rr, 08.03.2022, 17:32