back2root:ibm-pc-ms-dos:interrupts:int_20:start

Interruption 20h - Program Terminate

This function is no longer recommended, but can be used by version of DOS before 2.0, see Int 0x21,0x4C and Int 0x21,0x00

reg descr
CS PSP Segment address

Nothing

  • INT 20 restores the terminate, Ctrl-Break, and critical error exit addresses from values in the PSP, flushes all buffers, frees memory and returns to DOS via the termination handler address
  • does not close FCBs

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  • back2root/ibm-pc-ms-dos/interrupts/int_20/start.txt
  • Dernière modification : 2024/04/06 18:37
  • de frater