Juniper Systems Allegro DOS Manual - Manual (Page 241)

Software Developer's Guide for DOS Page 8-7
Allegro CPU Done Function (Allegro_CpuDone)
This function is called to restore the Power Manager to the normal state
after a CPU busy call.
void Allegro_CpuDone (void)
{
_asm
{
push ax
push bx
mov ax, 2E0Bh
mov bl, 1 // setup regs for function call
int 10h // call cpu done function
pop bx
pop ax
}
}