The Intel 8255 processor with an 8-bit data bus is configured as shown in the figure below ( PORT_A as INPUT,PORT_B as OUTPUT, PORT_CL as INPUT and PORT_CH as OUTPUT). Find the control register for the indicatedconfiguration.HINT: Assuming not using the BSR to control PCs PORTS, only considering using the I/O MODE with a digit of 1.A0Port_A7A1CONTROL WORD (BYTE)D7 D6 D5 D4 D3 D2 D1 DO? ? ? ? ? ? ? ?Control WordCSPort_B1= VO Mode0 = BSR ModePort CL(PC3-PC0)1= INPUT; 0 = OUTPUTRD7Mode Select00 = Mode 001 = Mode 11x = Mode 2Port B1= INPUT; 0 = OUTPUTWRMode Select0 = Mode 01= mode 1Port_CLDOD1D2D3 DATAD4 BUSPort APort CH(PC7-PC4)1= INPUT; 0 = OUTPUT1 = INPUT0 = OUTPUT4Port_CHD6BSR AFFECTS ONLY THE 82557The control register is 19h.The control register is 11h.Ob.The control register is 91h.OC.The control register is 00h.d.EN345ONINTEL 8253/8254/8255

Solution:-- 1)The given question is an type of the multiple choice question as it has been defined…

The Intel 8255 processor with an 8-bit data bus is configured as shown in the figure below ( PORT_A as INPUT, PORT_B as OUTPUT, PORT_CL as INPUT and PORT_CH as OUTPUT). Find the control register for the indicated configuration. HINT: Assuming not using the BSR to control PCs PORTS, only considering using the I/O MODE with a digit of 1. A0 Port_A 7 A1 CONTROL WORD (BYTE) D7 D6 D5 D4 D3 D2 D1 DO ? ? ? ? ? ? ? Control Word CS Port_B Port CL (PC3-PC0) 1= INPUT; 0 = OUTPUT Port B 1= INPUT; 0 = OUTPUT Mode Select 0 - Mode 0 1- mode 1 1= VO Mode 0 = BSR Mode RD 7 Mode Select 00 = Mode 0 01 = Mode 1 1x = Mode 2 WR Port_CL DO D1 D2 D3 DATA D4 BUS D5 Port A 1= INPUT 0 = OUTPUT Port CH (PC7-PC4) 1= INPUT; 0 = OUTPUT 4 Port_CH BSR AFFECTS ONLY THE 8255 7 The control register is 19h. O b. The control register is 11h. The control register is 91h. OC. The control register is 00h. d. INTEL 8253/8254/8255 3.

The Intel 8255 processor with an 8-bit data bus is configured as shown in the figure below ( PORT_A as INPUT, PORT_B as OUTPUT, PORT_CL as INPUT and PORT_CH as OUTPUT). Find the control register for the indicated configuration. HINT: Assuming not using the BSR to control PCs PORTS, only considering using the I/O MODE with a digit of 1. A0 Port_A 7 A1 CONTROL WORD (BYTE) D7 D6 D5 D4 D3 D2 D1 DO ? ? ? ? ? ? ? Control Word CS Port_B Port CL (PC3-PC0) 1= INPUT; 0 = OUTPUT Port B 1= INPUT; 0 = OUTPUT Mode Select 0 - Mode 0 1- mode 1 1= VO Mode 0 = BSR Mode RD 7 Mode Select 00 = Mode 0 01 = Mode 1 1x = Mode 2 WR Port_CL DO D1 D2 D3 DATA D4 BUS D5 Port A 1= INPUT 0 = OUTPUT Port CH (PC7-PC4) 1= INPUT; 0 = OUTPUT 4 Port_CH BSR AFFECTS ONLY THE 8255 7 The control register is 19h. O b. The control register is 11h. The control register is 91h. OC. The control register is 00h. d. INTEL 8253/8254/8255 3.

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Question

The Intel 8255 processor with an 8-bit data bus is configured as shown in the figure below ( PORT_A as INPUT,
PORT_B as OUTPUT, PORT_CL as INPUT and PORT_CH as OUTPUT). Find the control register for the indicated
configuration.
HINT: Assuming not using the BSR to control PCs PORTS, only considering using the I/O MODE with a digit of 1.
A0
Port_A
7
A1
CONTROL WORD (BYTE)
D7 D6 D5 D4 D3 D2 D1 DO
? ? ? ? ? ? ? ?
Control Word
CS
Port_B
1= VO Mode
0 = BSR Mode
Port CL
(PC3-PC0)
1= INPUT; 0 = OUTPUT
RD
7
Mode Select
00 = Mode 0
01 = Mode 1
1x = Mode 2
Port B
1= INPUT; 0 = OUTPUT
WR
Mode Select
0 = Mode 0
1= mode 1
Port_CL
DO
D1
D2
D3 DATA
D4 BUS
Port A
Port CH
(PC7-PC4)
1= INPUT; 0 = OUTPUT
1 = INPUT
0 = OUTPUT
4
Port_CH
D6
BSR AFFECTS ONLY THE 8255
7
The control register is 19h.
The control register is 11h.
Ob.
The control register is 91h.
OC.
The control register is 00h.
d.
EN345ON
INTEL 8253/8254/8255

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