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X-Hacker.org- TASM 2.x / MASM 6.x Assembly Language - <b>0:478h time-out values for parallel printers</b> http://www.X-Hacker.org [<<Previous Entry] [^^Up^^] [Next Entry>>] [Menu] [About The Guide]
0:478h                   Time-Out Values for Parallel Printers

 Length: 4 bytes

    These bytes are used to test when the parallel printers will time-out.

  --------------------------------------------------------------------------

    These values are usually 14h (20). On the PC and XT, these values tend
    to represent the number of seconds before a time-out. On other
    machines, such as the AT, these values are still 14h, but in the time-
    out test, these values are multiplied by 4 to compensate for the
    increased speed of the AT. However, the actual number of seconds
    before a time-out situation is about twice the time-out values stored
    here. In any case, these values should NOT be looked on as the number
    of seconds before a time-out, but instead should represent the amount
    of time needed to detect a time-out situation.

                0:478h - Parallel Printer Time-out Value (LPT1)
                0:479h - Parallel Printer Time-out Value (LPT2)
                0:47Ah - Parallel Printer Time-out Value (LPT3)
                0:47Bh - Parallel Printer Time-out Value (LPT4)

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