MDE Assembly Readme File

The MDELIB9X.LIB file contains the neccesary interface
for the MDE8255LPT-1 Board. The MDELIB9X.LIB file should
be located in the working directory for your program.


Commands in the Library file
----------------------------
MDEConfigPort
MDEOutPA
MDEOutPB
MDEOutPC
MDEInPA
MDEInPB
MDEInPC

Assembly Include Statements Required for use
--------------------------------------------
INCLUDELIB MDELIB9X

EXTERN MDEConfigPort : FAR
EXTERN MDEOutPA : FAR
EXTERN MDEOutPB : FAR
EXTERN MDEOutPC : FAR
EXTERN MDEInPA  : FAR
EXTERN MDEInPB  : FAR
EXTERN MDEInPC  : FAR

Usage Examples:
---------------

********************************************************************
*                          MDEConfigPort                           *
********************************************************************
Usage example:
  MOV AL, 80H                   ; Configuration Word
  MOV DX, 0378H                 ; Parallel Port Base Address
  CALL MDEConfigPort            ; Command to send the value

Description:
  This command sends the configuration value to the 8255. 

********************************************************************
*                             MDEOutPA                             *
********************************************************************
Usage example:
  MOV AL, 55H                   ; Value to be written to the port
  MOV DX, 0378H                 ; Parallel Port Base Address
  CALL MDEOutPA                 ; Command to send the value

Description:
  This command sends the value located in the AL register to the
  8255 which will send it to the Port.

********************************************************************
*                             MDEOutPB                             *
********************************************************************
Usage example:
  MOV AL, 55H                   ; Value to be written to the port
  MOV DX, 0378H                 ; Parallel Port Base Address
  CALL MDEOutPB                 ; Command to send the value

Description:
  This command sends the value located in the AL register to the
  8255 which will send it to the Port.

********************************************************************
*                             MDEOutPC                             *
********************************************************************
Usage example:
  MOV AL, 55H                   ; Value to be written to the port
  MOV DX, 0378H                 ; Parallel Port Base Address
  CALL MDEOutPC                 ; Command to send the value

Description:
  This command sends the value located in the AL register to the
  8255 which will send it to the Port.


********************************************************************
*                             MDEInPA                              *
********************************************************************
Usage example:
  MOV DX, 0378H                 ; Parallel Port Base Address
  CALL MDEInPA                  ; Command to get the value

Description:
  This command gets the value from the Port on the 8255 and places
  in Register AL

********************************************************************
*                             MDEInPB                              *
********************************************************************
Usage example:
  MOV DX, 0378H                 ; Parallel Port Base Address
  CALL MDEInPB                  ; Command to get the value

Description:
  This command gets the value from the Port on the 8255 and places
  in Register AL

********************************************************************
*                             MDEInPC                              *
********************************************************************
Usage example:
  MOV DX, 0378H                 ; Parallel Port Base Address
  CALL MDEInPC                  ; Command to get the value

Description:
  This command gets the value from the Port on the 8255 and places
  in Register AL



EOF

08/18/2003
www.MicroDigitalEd.com
rmckinlay@microdigitaled.com