Abstract: A temporary door latch for a door having a face bore and an edge bore where the edge bore extends from the face bore to a lateral edge of the door. The edge bore is disposed in substantial alignment with a strike bore of a door jam. The temporary door latch includes a longitudinal bolt portion that is dimensioned to extend through the edge bore and into the strike bore when the bolt portion is in a latching position. An actuation member is disposed adjacent one distal end of the bolt portion and is selectively operable to move the bolt portion between the latching position and a non-latching position. A flexible neck portion is also provided to connect the actuation member to the bolt portion, the neck portion selectively permitting the actuation member to bend in a substantially perpendicular direction to a longitudinal axis of the bolt portion.

Abstract: A temporary door latch for a door having a face bore and an edge bore where the edge bore extends from the face bore to a lateral edge of the door. The edge bore is disposed in substantial alignment with a strike bore of a door jam. The temporary door latch includes a longitudinal bolt portion that is dimensioned to extend through the edge bore and into the strike bore when the bolt portion is in a latching position. An actuation member is disposed adjacent one distal end of the bolt portion and is selectively operable to move the bolt portion between the latching position and a non-latching position. A flexible neck portion is also provided to connect the actuation member to the bolt portion, the neck portion selectively permitting the actuation member to bend in a substantially perpendicular direction to a longitudinal axis of the bolt portion.

Abstract: An improved architecture for a Prolog interpreter/compiler is described to facilitate interrupt processing. The new architecture employs interrupt control words and a set of interrupt control blocks to enhance Prolog processing. As interrupts are detected, an interrupt control word is loaded with the address of an interrupt control block for managing interrupt processing. Then, each time a new predicate is fired, the interrupt control word is tested and control is passed to the interrupt processing routine if the control word is non-zero.

Abstract: An improved technique for processing Prolog objects is described. The first bit of the Prolog object word is used as a flag to indicate whether the object word is a type pointer or type descriptor. If the one-bit flag indicates that the object word is a type pointer, then the address is available for immediate processing without the unnecessary processing associated with the prior art.

Abstract: An improved architecture for a Prolog interpreter is described. Implicit arguments are substituted for classical explicit arguments. The implicit arguments are supported by preassigned register allocation managed by the interpreter. The interpreter also exploits improved Prolog Object processing in which the first bit of the Prolog object word is used as a flag to indicate whether the object word is a type pointer or type descriptor. Significant improvements in interpreter execution result from the usage of these techniques.