Question: In an 8086 ?microprocessor-based system, a simple input/output application is desired using an 8255 ?chip, placed at consecutive even addresses starting from address 60H (60H - ?PortA, 62H ? ?PortB, 64H - ?PortC, and 66H ? ?control register). ?For this purpose, two buttons are connected to the PortA0 ?and PortA1 ?terminals of the 8255, ?producing logical 0

In an $8086$ ?microprocessor$-$based system, a simple input$/$output application is desired using an $8255$ ?chip, placed at consecutive even addresses starting from address $60$H $(60$H $-$ ?PortA, $62$H $?$ ?PortB, $64$H $-$ ?PortC, and $66$H $?$ ?control register$).$ ?For this purpose, two buttons are connected to the PortA$0$ ?and PortA$1$ ?terminals of the $8255,$ ?producing logical $0$ ?when pressed and logical $1$ ?when released. Four common anode $7-$segment displays are to be driven by PortB and PortC. PortC terminals will be used for the selection of the $7-$segment displays, while PortB terminals will serve as common data lines $($PortB$0?7-$segment display a$,...,$ ?PortB$7?7-$segment display h$)$ ?for the $7-$segment displays. All hardware connections related to the system have been made, and the project file is provided with the assignment. On the software side, a skeleton code defining the values to illuminate the common anode $7-$segment display segments for numbers $0-9$ ?at the data breakpoint is given in the project file.Write assembly code that implements the following:The system is controlled by two buttons $($INCREASE and DECREASE$)$ ?and consists of a counter with four $7-$segment displays. When the system is powered on$,$ ?the counter starts from $0000.$ ?The counter value increases by one each time the INCREASE button is pressed and decreases by one each time the DECREASE button is pressed. The counter counts in decimal places.STACK SEGMENT PARA STACK 'STACK'? DW $20$ ?DUP$(?)$STACK ENDSDATA SEGMENT PARA 'DATA'DIGITS DB $0$C$0$H$,0$F$9$H$,0$A$4$H$,0$B$0$H$,99$H$,92$H$,82$H$,0$F$8$H$,80$H$,98$HDATA ENDSCODE SEGMENT PARA 'CODE'? ASSUME CS:CODE, DS:DATA, SS:STAKSTART:? MOV AX$,$ ?DATA?MOV DS$,$ ?AX? ; Write your code hereENDLESS:?; Write your code here? JMP ENDLESSCODE ENDS? END START That is the code diagram

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NM O A 21 22 24 18 31 30 23 33 19 U1 RESET READY INTOS1 INTR AD(0.15 8086 AD(0.151 A[16.19 ALEXOSO HOLD/GT1 BHE HLDAGTO HUDANGTO DT/RIS! TEST DENISS RD NM MNMX WR LOCK CLK MIC SO LOAD_SEG=0x0800 25 34 27 32 AD(16.19 ORD WR O MO U8 NOT |AD|16..19 AN ADC 3 AD1 4 ALQ 7 D2 D3 AD3 8 AD4 ACH 13 De ADA 14 D4 D5 D6 nt D7 JADE 17 ADT 18 11 ADE 3 NADO 4 AD10 7 AD118 AD1213 AD1314 AD1417 ATHE AD15 18 1518 11 ADIE 3 AD17 4 AD18 7 JAD19 8 13 1: 14 17 18 U6 DO D1 11 >CLK MR 74273 U7 Ino DO D1 DI D2 D3 D4 D5 D D7 >CLK MR 74273 U10 DO D1 nz D2 D3 D D4 D5 D6 D7 CLK MR 74273 00 01 0 03 12 0412 OS 06 07 00 01 M 02 03 2 5 A 6 As Ag A10 A11 03 12 A12 04 AT OS CE 07 04 55 05 07 A4 15 As 5 PS AO A A2 16 A6 19 A7 2 5 15 16 A14 19 A15 2 5 6 12 15 16 19 A1 A17 A1B A19 A5 AB A7 ADRID. 19 A3 OBE A4 AO 1 MO CR U3 NOT ADID. 71 CSART O * A2 O ADO 34 AD 33 AD 32 AD3 31 ADA 30 ADS 20 ADE 28 ADT 77 5 36 9 36 6 U2 A C E1 E2 LE 74LS137 U4 DO D1 D2 D3 D4 D5 Da D7 RD WR AO A1 RESET CS 82554 TRACE=1 YO 15 14 YI 13 Y2 DT2 Y3 YATO (is! YSR YE D 1752 PAD PA PA2 PA3 PAS PAG PA7 FA440 PCD PC1 PC2 PC3 4 3 2 PC4 PCS 11 PRO 18 19 FBI 20 FB2 21 FB3 - 22 FB42 FBS2 23 PB6 2 25 24 FB7 Pa PC6 PC7 39 38 37 14 15 16 17 13 12 11 10 CS8255 B A INCREASE Co DECREASE H o o NM O A 21 22 24 18 31 30 23 33 19 U1 RESET READY INTOS1 INTR AD(0.15 8086 AD(0.151 A[16.19 ALEXOSO HOLD/GT1 BHE HLDAGTO HUDANGTO DT/RIS! TEST DENISS RD NM MNMX WR LOCK CLK MIC SO LOAD_SEG=0x0800 25 34 27 32 AD(16.19 ORD WR O MO U8 NOT |AD|16..19 AN ADC 3 AD1 4 ALQ 7 D2 D3 AD3 8 AD4 ACH 13 De ADA 14 D4 D5 D6 nt D7 JADE 17 ADT 18 11 ADE 3 NADO 4 AD10 7 AD118 AD1213 AD1314 AD1417 ATHE AD15 18 1518 11 ADIE 3 AD17 4 AD18 7 JAD19 8 13 1: 14 17 18 U6 DO D1 11 >CLK MR 74273 U7 Ino DO D1 DI D2 D3 D4 D5 D D7 >CLK MR 74273 U10 DO D1 nz D2 D3 D D4 D5 D6 D7 CLK MR 74273 00 01 0 03 12 0412 OS 06 07 00 01 M 02 03 2 5 A 6 As Ag A10 A11 03 12 A12 04 AT OS CE 07 04 55 05 07 A4 15 As 5 PS AO A A2 16 A6 19 A7 2 5 15 16 A14 19 A15 2 5 6 12 15 16 19 A1 A17 A1B A19 A5 AB A7 ADRID. 19 A3 OBE A4 AO 1 MO CR U3 NOT ADID. 71 CSART O * A2 O ADO 34 AD 33 AD 32 AD3 31 ADA 30 ADS 20 ADE 28 ADT 77 5 36 9 36 6 U2 A C E1 E2 LE 74LS137 U4 DO D1 D2 D3 D4 D5 Da D7 RD WR AO A1 RESET CS 82554 TRACE=1 YO 15 14 YI 13 Y2 DT2 Y3 YATO (is! YSR YE D 1752 PAD PA PA2 PA3 PAS PAG PA7 FA440 PCD PC1 PC2 PC3 4 3 2 PC4 PCS 11 PRO 18 19 FBI 20 FB2 21 FB3 - 22 FB42 FBS2 23 PB6 2 25 24 FB7 Pa PC6 PC7 39 38 37 14 15 16 17 13 12 11 10 CS8255 B A INCREASE Co DECREASE H o o

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Youve provided a description of an 8086 microprocessorbased system using an 8255 chip for IO interfacing and an accompanying schematic diagram for the hardware setup The task is to create assembly cod... View the full answer