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Turbo C - ISR chaining? (Developers)

posted by tkchia , 05.12.2020, 07:09

Hello RayeR,

> Hi, is there some helper function/macro in Borland BC/TC for chaining ISR
> (DJGPP has such feature)? I'd like to hook and let my ISR code be called
> first, without modifying registers and when done call the old ISR with
> original registers. Problem is that BC automatically saves and restores all

Turbo C++ 3.0 and Borland C++ 3.1 apparently have a _chain_intr function which does this, though I have not tried it myself.

_chain_intr is also in Open Watcom, but not in Turbo C 2.x.

Thank you!

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

Complete thread:

• Turbo C - ISR chaining? - RayeR, 05.12.2020, 00:26 (Developers)
  • Turbo C - ISR chaining? - tkchia, 05.12.2020, 07:09
    • Turbo C - ISR chaining? - RayeR, 06.12.2020, 18:25
  • Turbo C - ISR chaining? - alexfru, 05.12.2020, 09:48
    • Turbo C - ISR chaining? - RayeR, 06.12.2020, 18:29
      • Turbo C - ISR chaining? - alexfru, 07.12.2020, 06:32
        • Turbo C - ISR chaining? - tom, 07.12.2020, 14:42