You probably meant int into windows syscalls. IRQs are hardware-generated interrupts, when hardware demands attention. And the syscall instruction, as the fast

You probably meant int into windows syscalls. IRQs are hardware-generated interrupts, when hardware demands attention. And the syscall instruction, as the fast int replacement, is not recognized at all in real or vm86 modes. In the end, it depends on the environment that you use to run the FreeDOS, whether it forwards them or not. Note that windows does not provide binary compatibility at syscall level, only at ntdll level, which would be useless outside currently running windows, so it could be useless even if it was forwarded.