This repository contains an assembly language project that displays the ASCII table on the screen. The program initializes the screen, iterates through the ASCII values, and prints each character along with its corresponding hexadecimal value.
- Screen Initialization: Sets up the screen for displaying the ASCII table.
- ASCII Table Display: Iterates through ASCII values (0-255) and prints each character with its hexadecimal representation.
- Cursor Positioning: Manages the position of the cursor to display characters in a formatted manner.
The program sets up the data segment and initializes variables for row and column positioning.
.MODEL SMALL ; Define memory model
.STACK 100h ; Reserve stack space
.DATA ; Data segment
FILA DB 0 ; Initialize row to 0
COLU DB 0 ; Initialize column to 0
.CODE ; Code segment
START:
MOV AX, @DATA ; Load data segment address
MOV DS, AXThe program uses a loop to iterate through ASCII values, convert them to hexadecimal, and print them along with the corresponding character.
IMPCI MACRO CICLO
REPETIR:
PUSH CX
SHR CL, 4 ; Convert high nibble to ASCII
ADD CL, 30H
CMP CL, 39H
JLE IMPRIMIR
ADD CL, 7H
IMPRIMIR:
IMPDIGITO CL ; Print high nibble
POP CX
AND CL, 0FH ; Convert low nibble to ASCII
ADD CL, 30H
CMP CL, 39H
JLE IMPRI
ADD CL, 7H
IMPRI:
IMPDIGITO CL ; Print low nibble
CALL IGUAL ; Print equal sign
POP CX
IMPRICARACTER CX ; Print ASCII character
CURSOR FILA COLU ; Position cursor
INC FILA
CMP FILA, 24
JNE CONTINUAR
MOV FILA, 0
ADD COLU, 7
CONTINUAR:
POP CX
INC CX
CMP CX, 256
JE FIN
JMP REPETIR
IMPCI ENDM
The program includes macros for printing digits, characters, and positioning the cursor.
IMPDIGITO MACRO CL
MOV AH, 02H
MOV DL, CL
INT 21H
IMPDIGITOO ENDM
IGUAL PROC NEAR
MOV AH, 02H
MOV DL, ':'
INT 21H
RET
IGUAL ENDP
IMPRICARACTER MACRO CX
MOV AH, 02H
MOV DL, CL
INT 21H
IMPRICARACTER ENDM
CURSOR MACRO FILA COLU
MOV AH, 02H
MOV DH, FILA
MOV DL, COLU
INT 10H
CURSOR ENDM- Assemble and link the code using an assembler (e.g., TASM, MASM).
- Run the executable.
- The program will display the ASCII table on the screen, showing each character along with its hexadecimal value.
FILA: Stores the current row position for the cursor.COLU: Stores the current column position for the cursor.