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Move Character Instruction and Procedure to Avoid Crossing Page Boundary and Fast Circuit for Checking Address Range

IP.com Disclosure Number: IPCOM000049778D
Original Publication Date: 1982-Jul-01
Included in the Prior Art Database: 2005-Feb-09

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Leiner, KL [+details]


This article describes a new set of Move Character instructions in which each instruction specifies in its op code the number of bytes to be moved. The instruction also contains the starting address of the move from and move to locations in storage. Using the instructions and beginning a move to on a corresponding byte length boundary assures that the move operation does not extend into the next page. A simple circuit checks that the move to address is on the boundary that corresponds to the byte length specified by the op code.