Abstract: An out-of-order buffer includes an out-of-order queue and a controlling circuit. The out-of-order queue includes a request sequence table and a request storage device. The controlling circuit receives and temporarily stores the plural requests into the out-of-order queue. After the plural requests are transmitted to plural corresponding target devices, the controlling circuit retires the plural requests. The request sequence table contains m×n indicating units. The request sequence table contains m entry indicating rows. Each of the m entry indicating rows contains n indicating units. The request storage device includes m storage units corresponding to the m entry indicating rows in the request sequence table. The state of indicating whether one request is stored in the corresponding storage unit of the m storage units is recoded in the request sequence table. The storage sequence of the plural requests is recoded in the request sequence table.

Abstract: A conjugate cam reducer includes input and output units disposed at two opposite sides of a transmission unit. The transmission unit includes smaller-diameter and larger-diameter cam discs axially connected with each other. The smaller-diameter and larger-diameter cam discs have first and second grooves. The input unit includes an input disc, an eccentric shaft and a plurality of input rollers. The input disc has a smaller inner peripheral wall engaging with the smaller-diameter cam disc, and a plurality of first receiving grooves registered with the first grooves to receive the input rollers. The eccentric shaft is rotated to drive rotation of the transmission unit in an eccentric cycloidal motion. The output unit includes an output disc having a larger inner peripheral wall which engages with the larger-diameter cam disc, and a plurality of second receiving grooves which are registered with the second grooves to receive a plurality of output rollers.