Importance

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Abstract

An inertial Navigation System (INS) data interface box allows the transfer of INS data to standard commercial computer (i.e. Personal Computer or PCs) for flexible in-flight use of data received from the INS. The data box includes a means connected to the data bus for changing the INS output from 12 to 5 volts. The data of interest is then applied to a Label/Decode circuit which in turn directs the data to a Write Address Generator circuit which then applies the data to a Page One Memory Buffer circuit. After the data is filed in the Page One Memory Buffer, the Write Address Generator directs a Page Control circuit to turn to a Page Two Memory Buffer to accept the next cycle of data. During the interim data can be read out of the Page One buffer and converted to 8 bit words for applications to the PC. Should the 8 Bits Converter be processing data, 'page flips' is inhibited to prevent readout from the Page Two Buffer from mutilating Page One Buffer data as it is being read out. The PC requests a cycle of data by sending a 'P' to Bit Converter circuit causing the Read Address Generator to read a cycle of data out of the Page Memory Buffer which is not accepting input data.

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First Claim