MT>Hi All , hope you are having a nice day
MT>I am writing a little operating, but i have a little problem. When i try 
o
MT>execute this
MT>/*
MT>SEG_A        SEGMENT BYTE PUBLIC
MT>        ASSUME CS:SEG_A, DS:SEG_A
MT>        ORG 100h
MT>MAIN:         JMP        Start
MT>BootMsg                DB        'Loading OS...0'
MT>START:
MT>         MOV    AX,0B800h
MT>            MOV    ES,AX
MT>         MOV    BX,0
MT>         MOV    SI,OFFSET BootMsg
MT>MsgLoop: MOV    DX,[SI]
MT>         CMP    DX,'0'
MT>         JE     MsgDone
MT>         MOV    DH,7
MT>         MOV    ES:[BX],DX
MT>         INC    SI
MT>         INC    BX
MT>         INC    BX
MT>         JMP    MsgLoop
MT>MsgDone:
MT>         RET
MT>SEG_A        ENDS
MT>        END MAIN*/
MT>it doesn't work. Why does this doesn't work ?
I'm not certain what the c-style comment delimiters are doing there, but I
think you should try grabbing parts of the message as bytes instead of words,
so the following of your code:
MsgLoop:        MOV     DX, [SI]
                CMP     DX, '0'
should be replaced by:
MsgLoop:        MOV     DL, [SI]
                CMP     DL, '0'
This allows your end-of-string detection to work... the way you had it, it 
as
looking for the hex sequence 30h, 00h instead of the single character '0'.
((Cloud))
MauveCloud@juno.com
MauveCloud@yahoo.com
 * OLX 2.2 * BlueWave?  Wet behind the ears, eh?
--- PCBoard (R) v15.3/M 10
FAG>I tried to use int 14h func 02h: Receive character from communications
FAG>port.
FAG>The "specification" says: "This function waits for a character",
FAG>But in the few "experiments" I made, it seems that it doesn't _*wait*_ 
he
FAG>character....
FAG>Why?
You're looking at the wrong specs... under FOSSIL, it waits... w/o FOSSIL, 
ou
have to check AH to find out whether you really got a good read.
((Cloud))
MauveCloud@juno.com
MauveCloud@yahoo.com
 * OLX 2.2 * Call The Wrong Number BBS (209/943-1880) - 4nodes @14.4k
--- PCBoard (R) v15.3/M 10
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