PIC Vietnam - Code mạch đo nhiệt độ hiển thị lên led 7 đoạn .[HEPL!!]

anh chị nào pro trong diễn đàn giúp dùm em dịch đoạn code trên (ý nghĩa các câu lệnh) cái này e cần gấp ! tks !

PROCESSOR 16F877A
#INCLUDE <P16F877A.INC>
__CONFIG _CP_OFF & _WDT_OFF & _BODEN_OFF & _PWRTE_ON & _XT_OSC & _WRT_OFF & _LVP_OFF & _CPD_OFF
TAM EQU 20H
DEM1 EQU 21H
CHUC EQU 22H
DONVI EQU 23H
DEM EQU 24H
ORG 0000H
BCF STATUS,6
BSF STATUS,5
BSF TRISA,0
CLRF TRISB
BCF TRISE,0
BCF TRISE,1
BCF STATUS,5
CLRF PORTA
CLRF PORTB
CLRF PORTE
MAIN
CLRF TAM
CLRF CHUC
CLRF DONVI
CALL ANALOG
BSF STATUS,5
MOVF ADRESL,W
BCF STATUS,5
MOVWF TAM
DICHPHAI
BSF STATUS,5
RRF ADRESL,0
BCF STATUS,5
MOVWF TAM
CALL TACHSO
BSF PORTE,0
BCF PORTE,1
MOVF CHUC,W
CALL BANG
MOVWF PORTB
CALL DELAY
BCF PORTE,0
BSF PORTE,1
MOVF DONVI,W
CALL BANG
MOVWF PORTB
CALL DELAY
GOTO MAIN
ANALOG
BSF STATUS,5
BCF STATUS,6
BSF ADCON1,3
BSF ADCON1,2
BSF ADCON1,1
BCF ADCON1,0
BCF STATUS,5
BCF ADCON0,5
BCF ADCON0,4
BCF ADCON0,3
BCF ADCON0,7
BCF ADCON0,6
BSF STATUS,5
BSF ADCON1,6
BSF ADCON1,7
BCF STATUS,5
BSF ADCON0,0
BSF ADCON0,2
LOOP
BTFSC ADCON0,2
GOTO LOOP
RETURN
TACHSO

TROLAI
MOVLW D'10'
SUBWF TAM,1
BTFSS STATUS,0
GOTO THOAT
INCF CHUC,1
MOVLW D'10'
GOTO TROLAI
THOAT
MOVLW D'10'
ADDWF TAM,0
MOVWF DONVI
RETURN
BANG
ADDWF PCL,1
RETLW B'11000000'
RETLW B'11111001'
RETLW B'10100100'
RETLW B'10110000'
RETLW B'10011001'
RETLW B'10010010'
RETLW B'10000010'
RETLW B'11111000'
RETLW B'10000000'
RETLW B'10010000'
DELAY
BSF STATUS,5
BCF OPTION_REG,3
BCF OPTION_REG,2
BSF OPTION_REG,1
BCF OPTION_REG,0
BCF STATUS,5
MOVLW D'5'
MOVWF DEM1
LOOP
MOVLW D'5'
MOVWF TMR0
BSF STATUS,5
BCF OPTION_REG,5
BCF STATUS,5
LOOP1
BTFSS INTCON,2
GOTO LOOP1
BCF INTCON,2
DECFSZ DEM1,1
GOTO LOOP
RETURN
END