Procedure Intr (IntNo: byte; var Regs: registers) ;
Intr executes a software interrupt number IntNo (must be between 0 and 255), with processor registers set to Regs. After the interrupt call returned, the processor registers are saved in Regs.
Under LINUX this call does nothing, because interrupts are managed by the kernel. The only allowed interrupt is 80h, the kernel entry interrupt.
MSDos, see the LINUX unit.