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Extended Character Scan Instruction Disclosure Number: IPCOM000042345D
Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-03

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Beetcher, RC Berstis, V Day, PR Goolsbey, MA [+details]


The scan instruction has the ability to scan mixed data including characters represented by two bytes and control characters in ideographic display and printer data streams. The scan instruction finds particular utility in a computer system which can process ideographic character input/output data. The normal one byte or EBCDIC, two-byte ideographic, and control data can be intermixed within the same input/ output data stream, as illustrated in Fig. 1. The scan instruction is a storage to storage instruction with a format as shown in Fig. 2. The operands of the scan instruction are as follows: Operand 1, bits 16-31, specifies the base/displacement for the start address of an area containing control information for the scan operation to be performed.