Category : Assembly Language Source Code
Archive   : TASMSWAN.ZIP
Filename : BOXCHAR.ASM

%TITLE "Converts ALT-digit keys into box drawing characters"

IDEAL
DOSSEG
MODEL small
STACK 256

cr EQU 13
lf EQU 10
Fn10 EQU 100
LowIndex EQU 152
HighIndex EQU 161

DATASEG
message db cr,lf, 'Sample Character TABLE translation'
db cr,lf, 'Press Alt-1 to Alt-0 to display characters'
db cr,lf '>>>> Press F10 to end <<<<', cr,lf,lf,0

table db 179,180,191,192,193,194,195,196,217,218

CODESEG

EXTRN StrWrite:proc, GetCh:proc

Start:
mov ax,@data
mov ds,ax
mov es,ax
mov di,offset message
call StrWrite
@@10:
call GetCh
jnz @@10
cmp al,Fn10
je Exit
cmp al,LowIndex
jb @@10
cmp al,HighIndex
ja @@10
sub al,LowIndex
mov bx, offset table
xlat
mov dl,al
mov ah,2
int 21h
jmp @@10
Exit:
mov ax,04C00h
int 21h

END Start