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Use of Communication Flag with Internal Adjust

IP.com Disclosure Number: IPCOM000079945D
Original Publication Date: 1973-Oct-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 13K

Publishing Venue

IBM

Related People

Boyd, WW: AUTHOR

Abstract

The general work flow of a job through the IBM Mag Card 11 is input text into the buffer; revise text if necessary; and, scan text using internal adjust. Scanning will be terminated either by running out of text prior to the pagination point or by printing a reference line at the pagination point. In the latter case, scanning is reinitiated by the operator, which causes the text up to and including the reference line to be recorded, and scanning of the remaining text. Scanning is usually terminated when there is no more text in the memory. There could, however, be enough text in the memory so that the pagination point could again be attained. However, if no additional text has been input into the buffer, at some point in time scanning will terminate by running out of text prior to a pagination point.

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Use of Communication Flag with Internal Adjust

The general work flow of a job through the IBM Mag Card 11 is input text into the buffer; revise text if necessary; and, scan text using internal adjust. Scanning will be terminated either by running out of text prior to the pagination point or by printing a reference line at the pagination point. In the latter case, scanning is reinitiated by the operator, which causes the text up to and including the reference line to be recorded, and scanning of the remaining text. Scanning is usually terminated when there is no more text in the memory. There could, however, be enough text in the memory so that the pagination point could again be attained. However, if no additional text has been input into the buffer, at some point in time scanning will terminate by running out of text prior to a pagination point.

It is at this point that a communication flag is inserted into the memory, to mark the point where scanning was terminated by running out of text. Otherwise, this point will be lost upon subsequent entry and revision of additional text.

Any subsequent entry of text into the buffer after an "end of text" (EOT) resets all indications that the machine has been previously scanning. After the revision of this text, the operation flag can be left anywhere in the buffer memory.

Under these conditions when scanning is initiated, the operation flag should be positioned between scanned and unscanned text because the exact placement of the operation flag is a prerequisite for scanning. Placing the operation flag at the beginning of memory in every case can be done.

Immediately after the scanning operation is started, flag placement routine is initiated. A buffer search for the operation flag begins, and when found, it is trapped in the Normal Register of the Shift Register Control Chip. If a memory section boundary is detected before the communications flag is detected (the normal case in that the operator initiated sca...