home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Games of Daze
/
Infomagic - Games of Daze (Summer 1995) (Disc 1 of 2).iso
/
x2ftp
/
msdos
/
vla
/
asmvla00.lzh
/
ASM2.ASM
< prev
next >
Wrap
Assembly Source File
|
1993-03-21
|
1KB
|
61 lines
; ASM2.ASM
; Prints messages get keyboard input and has control flow
DOSSEG
.MODEL SMALL
.STACK 200h
.DATA
Prompt db 13,10,"Do you want to be prompted again? (Y/N) $"
NoMessage db 13,10,"Ok, then I won't prompt you anymore.$"
YesMessage db 13,10,"Here comes another prompt!$"
UnKnownKey db 13,10,"Please hit either Y or N.$"
.CODE
START:
mov ax,@DATA ;moves the segment of data into ax
mov ds,ax
MainLoop:
mov ah,9
mov dx,offset Prompt
int 21h ;print a message
mov ah,0
int 16h ;get a key, returned in AX
;AL is the ASCII part
;AH is the SCAN CODE
push ax
mov dl,al
mov ah,2
int 21h ;print character in dl
pop ax
cmp al,"Y" ;was the character a 'Y'?
jne NotYes ;nope it was Not Equal
mov ah,9
mov dx,offset YesMessage
int 21h
jmp MainLoop
NotYes:
cmp al,"N" ;was the character a 'N'
je ByeBye ;Yes, it was Equal
mov dx,offset UnknownKey
mov ah,9
int 21h
jmp MainLoop
ByeBye:
mov dx,offset NoMessage
mov ah,9
int 21h
mov ax,4c00h ;Returns control to DOS
int 21h ;MUST be here! Program will crash without it!
END START