Kontron DIMM-PC/ETH+COM, Руководство пользователя

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11 Appendix D: Assembler Program
Kontron User's Guide DIMM-PC/ETH+COM 21
11 Appendix D: Assembler Program
The following assembler program is the source code of the software tool DIO1I111.EXE
;*******************************************************************************************;
;* DIO1I110.ASM
*;
;*-------------------------------------------------------------------- *;
;* Program for activating the additional serial ports *;
;* COM3 and COM4 on the DIMM-I/O modules *;
;* COMBO and COM1 *;
;*-------------------------------------------------------------------- *;
;* Autor : F. Krauss *;
;* Creation date : 30.03.1999 *;
;* Last update : 30.03.1999 *;
;*-------------------------------------------------------------------- *;
;*******************************************************************************************;
;== Stack ==============================================================
stackseg segment para STACK 'STACK'
;definition of the Stack-Segment
dw 256 dup (?)
;the stack covers 256 Words
stackseg ends
;end of the Stack-Segment
;== Code ===============================================================
code segment para 'CODE'
;definition of the CODE-Segment
assume cs:code ;CS refers to the Code-Segment
prog proc far
;this procedure ist the real
;main program and it was executed
;after starting the program
;--- enter configuration mode ---
mov dx, 370H
mov ax, 055H
cli
out
dx, al
out dx, al
sti
;--- configure registers ---
mov dx, 370h ;initialize COM3 at the adress 3E8
mov al, 24h
out dx, al
mov dx, 371h
mov al, 0fah
out dx, al
mov dx, 370h ; initialize COM4 at the adress 2E8
mov al, 25h
out dx, al
mov dx, 371h