This is the first applet made after learning the compilation. The program is small, but it is quite satisfactory. Self-considered is the first molded program they do. In order to remember the mood of the priest, put this programs that are difficult to refer to the program :).
Introduction: Making a graphical element table, a number of various character graphics required in the table, and display it on the top left of the screen with a memory mapping method. Position the cursor on the right half of the screen. Up, lower, left, and right cursor control key control the cursor in four directions, do not show its trajectory at the same time to control the border of the cursor position without exceeding the border of the drawing area. When a digital key is pressed, the character graphic of the corresponding number is displayed at the cursor position, then move the cursor, then display a character graph, and finally draw a graphic composed of characters. Press the ESCAPE button to exit the program and return to DOS.
Data segment
Buffer DB 200 DUP (?)
DB1 DB 1
DB2 DB 0
DB3 DB 00H
MSG1 DB 'The Table: The Drawing Area: (Press "ESC" Key To EXIT)', '$'
Data ends
Program segment
Main Proc Far
Assume Cs: Program, DS: Data
Start:
Push DS
Sub Ax, AX
Push AX
Mov AX, DATA
MOV DS, AX
Mov Ah, 09
LEA DX, MSG1; display information
Int 21h
MOV BX, 26
MOV DB1, 0; display boundary line
MOV DB2, 36
OP:
MOV AH, 2
MOV BH, 0
MOV DH, DB1; initialized cursor
MOV DL, DB2
INT 10h
MOV BH, 0
MOV CX, 1
Mov Al, 2ah
Mov Ah, 0ah
INT 10h
INC DB1
Dec BX
JNZ OP
MOV DB1, 1
MOV DB2, 0
MOV Si, 0
OP1:; production graphic element table
MOV AH, 2
MOV BH, 0
MOV DH, DB1; positioning cursor
MOV DL, DB2
INT 10h
MOV Al, DB3
Mov Buffer [Si], Al; Display Digital and Deposits the ASCII
Push Si
Add Si, 30H
MOV BH, 0
MOV AX, SI
And AX, 00ffh
MOV CX, 1
Mov Ah, 0ah
INT 10h
INC DB2
CMP DB2, 39; judgment is overcrowded
JNA OP2
INC DB1
MOV DB2, 0
OP2: MOV AH, 2
MOV BH, 0
MOV DH, DB1; Relocation Cursor
MOV DL, DB2
INT 10h
Mov Ah, 0ah
MOV BH, 0; display character
MOV Al, DB3
MOV CX, 1
INT 10h
POP Si
Inc Si
INC DB3
CMP DB3, 09H
Ja over
Add DB2, 7
CMP DB2, 39; judgment is overcrowded
JNA OP1
INC DB1
MOV DB2, 0
JMP OP1
Over:
MOV DB1, 1
MOV DB2, 38
MOV AH, 2MOV BH, 0
MOV DH, 1
MOV DL, 38; Initialization Cursor
INT 10h
OPP0:
MOV AH, 0
INT 16H; judgment input key
CMP AH, 48H; arrow keys
JE UP
CMP AH, 50H
JE Down
CMP AH, 4DH
Je Right
CMP AH, 4BH
Je left
CMP AH, 01H; ESC button
JNZ RR
RET
RR: CMP AL, 30H; Number
JNB OPP2
JMP OPP0
OPP2:
CMP Al, 39h
JA OPP0
And AX, 00ffh
SUB AX, 30H
Mov Si, AX
MOV Al, Buffer [Si]; Display the corresponding characters
MOV BH, 0
MOV CX, 1
Mov Ah, 0ah
INT 10h
JMP OPP0
Up:
DEC DB1
JZ Edg_UP
JMP OPP1; Digital Line
EDG_UP:
MOV DB1, 1
JMP OPP1
Down:
INC DB1
CMP DB1, 24
Ja Edg_Down
JMP OPP1
Edg_down:
MOV DB1, 24
JMP OPP1
Right:
INC DB2
CMP DB2, 78
Ja Edg_Right
JMP OPP1
EDG_RIGHT:
MOV DB2, 78
JMP OPP1
LEFT:
DEC DB2
CMP DB2, 38
JB Edg_Left
JMP OPP1
Edg_left:
MOV DB2, 38
OPP1:
MOV AH, 2
MOV BH, 0; relocation cursor
MOV DH, DB1
MOV DL, DB2
INT 10h
JMP OPP0
EXIT:
Ret; return to DOS
Main endp
Program Ends
End Start
