Abstract: The invention relates to a pick sleeve (10) including a head (12) and a shank (14). The head (12) includes a central part (20) and a bearing member (22) which is secured to the central part (20). The bearing member (22) is separable from the central part (20) in order to facilitate removal of the pick sleeve (10) from a holder (38). The invention extends to a tool (50) which is used in the removal of the pick sleeve (10) from the holder (38).

Abstract: The invention relates to a pick sleeve (10) including a head (12) and a shank (14). The head (12) includes a central part (20) and a bearing member (22) which is secured to the central part (20). The bearing member (22) is separable from the central part (20) in order to facilitate removal of the pick sleeve (10) from a holder (38). The invention extends to a tool (50) which is used in the removal of the pick sleeve (10) from the holder (38).

Abstract: A computer system implementing two levels of translation lookaside buffers (TLBs). The first-level TLBs are small, two-set associative, have a short access time and reside on the CPU chip. The second-level TLBs, on the other hand, are large, direct mapped, and reside in otherwise unused portions of the cache tag RAMs of the instruction and data cache sub-systems. As a result of this arrangement, performance may be improved without limiting the amount of available cache memory for a given implementation. Even if higher capacity memory devices are required for implementing the second-level TLBs in the cache tag RAMs in accordance with the invention, a significant savings over the cost of two sets of smaller devices would still result.