Set Protected Mode Interrupt Vector

Call With

AX = 0205H
BL = interrupt number
CX:(E)DX = selector:offset of exception handler

Returns

if function successful
Carry flag = clear

if function unsuccessful
Carry flag = set
AX = error code

8022H

invalid selector

Notes

• The value passed in CX should be a valid protected mode code selector, not a real mode segment address.

• 32-bit clients must supply a 32-bit offset in the EDX register. If the client's handler chains to the next exception handler it must do so using a 32-bit interrupt stack frame.

• DPMI hosts must support all 100H (256 decimal) interrupt vectors with this function.

• Hardware interrupts are sent to the primary client of the virtual machine while software interrupts are sent to the current client. (See Appendix A: Glossary for definitions of primary and current client.)

• Refer to the rules for descriptor usage in Appendix D.