Kontron MSM800BEV V101 BIOS - Manual (Page 30)

Geode LX800 / LX900 / Special Peripherals, Configurations, Software
www.kontron.com 28
6 Special Peripherals, Configurations, Software
6.1 The Special Function Interface for MICROSPACE Computers
All functions are performed by starting the software interrupt 15hex with the following arguments:
6.1.1 INT 15h SFR Functions
Function: WRITE TO EEPROM
Number: E0h
Description:
Writes the Data Byte into the addressed User-Memory-Cell from the serial EEprom.
The old value is automatically deleted.
AH 78h DLAG Int15 function
AL E0h Function request
BX Address in EEPROM (0-1024 Possible)
CL Data Byte to store
Input values:
SI 1234h User-Password (otherwise EEP is write-protected)
Output values: None, all registers are restored when reopened
Function: READ FROM EEPROM
Number: E1h
Description: Reads the Data Byte from the addressed User-Memory-Cell of the serial EEprom.
AH 78h DLAG Int15 function
AL E1h Function request
BX Address in the EEPROM (0-1234 possible)
Input values:
SI 1234h User-Password (DLAG-Password for access to the DLAG-Memory-Cells)
Output value: AL Data Byte
Function: WRITE SERIAL NUMBER
Number: E2h
Description:
Writes the serial number from the serial EEprom into the addressed DLAG-Memory-
Cell. The old value is automatically deleted.
AH 78h DLAG Int15 function
AL E2h Function request
BX, CX, DX Serial number
Input values:
SI Password
Output values: None, all registers are restored when reopened
Function: READ SERIAL NUMBER
Number: E3h
Description: Reads the serial number from the board into the serial EEprom
AH 78h DLAG Int15 function
Input values:
AL E3h Function request
Outputs values: BX, CX, DX Serial number (binary, not ASCI)