here circuit diagram for interface Dot-matrix LED display

1- Here is the assembly language code for the circuit shown in the picture. Explain the design and code, line by line, and fix errors, if any. 2- There is a problem when displaying the result in the PROTEUS program, as there may be a small error in the circuit or the code. 3- Write a report on this design including a summary, introduction, body of report, and conclusion

CODE SEGMENT

ASSUME CS:CODE,DS:CODE ;

PPIC_C EQU 06H ;control register

PPIC EQU 04H ;c port

PPIB EQU 02H

PPIA EQU 00H ;

ORG 0000H

MOV AL,10000000B

OUT PPIC_C,AL

;

L1: MOV SI,OFFSET FONT

;

MOV AH, 11111110B

;

L2: MOV AL,AH

OUT PPIB,AL

MOV AL,BYTE PTR CS:[SI]

OUT PPIA,AL

;

CALL TIMER

MOV AL,00H

OUT PPIA,AL

INC SI

CLC

ROL AH,1

JC L2

JMP L1

;

INT 3

;

TIMER: MOV CX,250

TIMER1:

NOP

NOP

NOP

NOP

LOOP TIMER1

RET

;

FONT:

DB 00000000B

DB 11111100B

DB 00010010B

DB 00010001B

DB 00010001B

DB 00010010B

DB 11111100B

DB 00000000B

CODE ENDS

END

MOV AL,BL

OUT PPIB,AL

CALL DELAY

ROL BL,1;

JMP L1

DELAY:MOV CX,11111111111111B

TIMER1:NOP

NOP

NOP

NOP

LOOP TIMER1

RET

;

CODE ENDS

END

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