Browse Prior Art Database

Paper Tape Reader Simulator

IP.com Disclosure Number: IPCOM000076814D
Original Publication Date: 1972-Apr-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 64K

Publishing Venue

IBM

Related People

Ellsworth, GM: AUTHOR [+3]

Abstract

A simulator is shown for distribution of computer output, as output from a paper tape reader. Most numerical machine tool controllers are designed to operate in response to data from paper tape readers. In order to directly transmit data from computers to numerical machine tool controllers, paper tape reader output is simulated. Data from paper tape readers is transmitted a character at a time, each accompanied by a short duration "sprocket" pulse.

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Paper Tape Reader Simulator

A simulator is shown for distribution of computer output, as output from a paper tape reader. Most numerical machine tool controllers are designed to operate in response to data from paper tape readers. In order to directly transmit data from computers to numerical machine tool controllers, paper tape reader output is simulated. Data from paper tape readers is transmitted a character at a time, each accompanied by a short duration "sprocket" pulse.

The simulator 10 is connected to a computer 11 and to a plurality of numerically controlled (N/C) device controllers. Those devices that are running continually demand more data by supplying a "run" signal on the corresponding line 12. The presence of a run signal causes a supporting program algorithm within the computer 11 to load a sixteen-bit word into a respective "data in" register 13, and enable a "data present" control line 14.

The sixteen-bit word (2-data characters per word) is transferred to the buffer register 15 for distribution. Immediately following each occurrence of a data word transfer from the data in register 13 to the buffer register 15, a respective "send next data" demand signal 16 is presented to the computer 11. Upon each occurrence of the demand signal 16, the supporting program algorithm loads a next sequential data word in a respective data in register 13.

After a word is received within buffer register 15, the two data characters A/B 17 and 18 are gated to an outp...