DIGITAL-LOGIC AG PCCP5 Manual V2.3
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9.4.1 INT 15h SFR Functions
All functions are performed by starting the SW-interrupt 15hex with the following arguments:
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.
Input Values: AH = E0h Function Request
AL Databyte to store
BX Address in the EEPROM (0-1024 Possible)
SI 1234h User-Password (otherwise EEP is write-
protected)
DLAG-Password for access to the DLAG-Memory-Cells
Output Values: None, all registers are preserved.
Function: READ FROM EEPROM
Number: E1h
Description: Reads the Data byte from the addressed User-Memory-Cell of the serial
EEPROM.
Input Values: AH = E1h Function Request
BX Address in the EEPROM (0-1024 Possible)
SI 1234h User-Password
DLAG-Password for access to the DLAG-Memory-Cells
Output Values: AL read databyte
Function: WRITE SERIALNUMBER
Number: E2h
Description: Writes the Serialnumber from the serial EEPROM into the addressed DLAG-
Memory-Cell. The old value is automatically deleted.
Input Values: AH = E2h Function Request
DX,CX,BX Serialnumber (Binary, not Ascii)
SI Password
Output Values: None, all registers are preserved.
Function: READ SERIALNUMBER
Number: E3h
Description: Reads the serialnumber from the board into the serial EEPROM.
Input Values: AH = E3h Function Request
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