ocr: Functions are normally reterenced by the number loaded into the AH register when the interrupt is called (c.g.. Bluck Read is function number Ox18). FOSSIL Serial I/O Functions NOTE: For each FOSSIL serial function, the DX register must be set t0 the appropriate communica- tion port number, wixere 0 is port number L. Function Name Input Registers Returned Registers Set Parameters AH=0, AX=Status AL Bits 7,6,5 == Baud AH=Line Status Register (Values may vary by driver) AL=Modem Status Register AH Bit 7 = Timeout 000 = 19,200 Baud (for FOSSIL unctions I and 2 only) 001 = 38,400 Baud OLO = 300 Ba ...
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