pc386 LPT question

Joel Sherrill <joel@OARcorp.com> joel.sherrill at OARcorp.com
Thu Dec 1 19:19:28 UTC 2005


I finally have the old software for our scout's pinewood derby
timer and it is a DOS program using a BIOS call to read the printer

The macro to read the status of the starting gate and finish
looks like this:

#define         START_GATE              (0x80)
#define         ALL_LANES               (0x70)
#define         LANE_2                  (0x40)
#define         LANE_1                  (0x20)
#define         LANE_3                  (0x10)

/* bit #3 in the printer status regiser is connected to the start gate */
     (_bios_printer(_PRINTER_STATUS,0,uiDummy) & START_GATE)

/* define macro to test if a car has crossed the finish line */
    (_bios_printer(_PRINTER_STATUS,0,uiDummy) & ALL_LANES)

Does anyone know how to get the same information with or without a BIOS 
call using the pc386 BSP?

Please... Thanks. :)

Joel Sherrill, Ph.D.             Director of Research & Development
joel at OARcorp.com                 On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
    Support Available             (256) 722-9985

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