Specifications

88 AMD Geode™ GeodeROM Functional Specification
Parallel Port BIOS Support
32087C
9.1.2 Function 01h - Initialize Parallel Port
Description:
Resets the printer and sets the top of the page to the current position of the paper by sending control codes 08h and
0Ch.
Passed:
Returns:
9.1.3 Function 02h - Get Port Status
Description:
Reads the current status of the printer. This function can be used to determine if the printer is ready to accept data.
Passed:
Returns:
Parameter Description
AH 01h
DX Port number:
See "Function 00h - Print a Character" on page 87
Parameter Description
AH Encoded information indicating status of the operation:
Bit 7 = Printer ready
Bit 6 = Acknowledgement of last character
Bit 5 = Paper empty
Bit 4 = Printer selected
Bit 3 = I/O Error
Bits [2:1] = Reserved
Bit 0 = Timeout error
Parameter Description
AX 02h
DX Port number:
See "Function 00h - Print a Character" on page 87
Parameter Description
AH Encoded information indicating status of the port:
Bit 7 = Printer ready
Bit 6 = Acknowledgement of last character
Bit 5 = Paper empty
Bit 4 = Printer selected
Bit 3 = I/O error
Bit [2:1] = Reserved
Bit 0 = Timeout error