Monday, January 27, 2020

Beliefs of the Republication Party, USA

Beliefs of the Republication Party, USA Caleb Dawson The Republican Platform Ever since a small group of anti-slavery activists met in 1854, the Republican Party has been a strong influence in American government and politics. In 1861, Abraham Lincoln firmly set the Republican Party as one of the two major political parties, when he became their first President and then won the Civil War. Then in the 1980s, Ronald Reagan, widely famed for his conservatism, highlighted the Republican Party’s key principles of freedom, equal opportunity, and God-given rights. Today, Republicans seek to reinstall America’s legacy of freedom and conservatism in the hearts of all Americans with their domestic, economic, and foreign policies. Republicans aim to protect individual freedoms, restore power and influence to communities, and encourage self-sustainability both locally and nationally through their domestic policy. First, the Republican Party holds a very strong view on the heavily debated topic of education. When the public education system first started, Republicans fought against the radical idea. They wanted individual communities to be able to instill their own beliefs into their people. As a result, current Republicans support private schools and home-schooling, which both return the power of teaching closer to the family level (â€Å"Republican Party (United States),† 2014). Recently, the Supreme Court ruled that prayer is illegal in the school. Feeling that this infringes our religious rights, Republicans strongly promote returning prayer to the school (â€Å"Republican Party on Education,† 2013). Another current issue is that of higher education. With the cost of college quickly rising, stu dent debt is soaring to new heights. In fact, the national student debt has now exceeded the national credit card debt (â€Å"Student Debt,† 2014). To help solve this problem, Republicans seek to stop all federal loans for college and help promote private loans, making long term debt less likely. Another problem is that, more than half of all recent graduates find themselves either working in areas outside their field of study or unemployed. As a result, Republicans say that more students should be encouraged to attend community colleges and technical institutions to get more practical training (â€Å"Republican Party on Education,† 2013). Also hitting the headlines, the energy crisis brings the Republican’s domestic views to light. Specifically about production methods, Republicans support â€Å"increased Federal investment into the development of clean alternative fuels, increased nuclear power, as well as fuels such as ethanol, as a way of helping the U.S. achieve energy independence, as opposed to supporting less use of carbon dioxide-producing methods of generating energy† (â€Å"Republican Party (United States),† 2014). With coal accounting for 37% of energy produced in the United States, they support improving coal plants and continuing to make them more environmentally-friendly. Also, nuclear energy should be promoted as a great energy source for America. Renewable, green energy sources should be thoroughly researched and promoted, but not as the primary source of energy. When it comes to resources, the Republican Party’s primary goal is for America to achieve self-sustainability. By legalizing and promoting the drilling for oil in many places, such as Alaska, Republicans hope to create many jobs and expand America’s energy resources. However, because of burdensome government regulations, the oil and natural gas industries have been greatly stifled. But by lightening these regulations, Republicans hope to get the American economy moving once again (â€Å"Energy – The All-American Plan,† 2014). A rapidly growing problem, the executive bureaucracy, is the subject of much discussion among Republicans. Although most Republicans believe that the bureaucracy as a whole is violating many American rights, many target regulatory agencies as the main problem. Because regulation has become a punitive threat instead of a beneficial guide, Republicans want new major regulations to have to pass congressional approval before they are applied. Another way through which the Republican Party seeks to reduce the power of the bureaucracy is by removing many of the regulations on businesses. Saying that current regulations are essentially a stealth tax on Americans, Republicans want to remove the regulations that are counter effective and only implement ones that are cost-effective (â€Å"2012 Republican Platform,† 2013). After removing many powers from the federal bureaucracy, Republicans hope to restore those powers back to the state and local levels. For they believe that the level c losest to the area dealt with should be the one to receive the governing authority on it (â€Å"Jefferson Perspective: Bureaucracies,† 1996). The Republican stance on gun control rights is very conservative and protective. Republicans think that the right to own a gun is part of the fundamental right of self-defense; therefore, it should not be infringed upon by the government. Also, Republicans believe ammunition should also be able to be obtained and stored freely without registration. Furthermore, they want to stop lawsuits targeted at gun manufacturers as an attempt to deprive Americans of the rights given to them by the 2nd Amendment. They say that when a tragic event occurs involving a gun, the gun is not the thing that should be regulated. The criminal should be punished, not the rest of the nation. Just like if a person killed someone with a spoon, spoons should not be banned across the nation (â€Å"Republican Party on Gun Control,† 2013R). Showing its Christian heritage, the Republican Party has widely made known its pro-life stance. Their main goal is to make abortion banned except for in cases of incest or rape. Republicans support the human life amendment, which would ban abortion. They support adoption and abstinence instead of adoption clinic referrals (â€Å"Republican Party on the Issues,† 2013). Most Republicans believe that abortion is simply a moral issue. While believing in the Christian principle that every human has a right to life, Republicans claim that abortion is simply murder. Furthermore, they state that the Declaration of Independence and the Constitution never state that an unborn baby does not have the Creator-endowed right to life (â€Å"The Republican Party is the Pro-Life Party,† 2001). Seeking to restore both freedoms and productivity to America, the Republican Party holds strongly to their economic policy. One of the cornerstones of the American success is its free-market economy, so Republicans hold strong opinions on it, encouraging economic prosperity through free markets and individual achievement (â€Å"Republican Party (United States),† 2014). â€Å"Republicans believe in the importance of sensible business regulations that promote confidence in our economy among consumers, entrepreneurs and businesses alike. However, they oppose interventionist policies that put the federal government in control of industry and allow it to pick winners and losers in the marketplace† (â€Å"2012 Republican Platform,† 2013). When it comes to income tax, Republicans claim it is harmful, for they say it punishes people that save and has grave implications for seniors living on fixed incomes (â€Å"Republican Party on Budget and Economy,†2013). They o ppose a graduated income tax, because it targets those that create jobs and wealth, stifling our free market economy. Supporting the worker, the GOP believes that workers should have the right to decide whether to join a union or not (â€Å"Republican Party (United States),† 2014). While welfare can be an honorable thing, Republicans do not want it to be abused. While most Republicans agree that a welfare system should be implemented to assist the poor, they prefer the government leave welfare in the hands of the individual and local level. As a result, religious organizations and other charities would become the target for welfare spending. Unfortunately, however, the welfare system is often abused by individuals. So Republicans seek to crack down on these incidents by tightening restrictions on welfare application and benefits (â€Å"Republican Party (United States),† 2014). Because of poor management many people now use welfare as a means of living. Republicans want welfare only to help people, not to support them (â€Å"Republican Party on Budget and Economy,† 2013). Overall, Republicans are opposed to government-run healthcare. Although many Republican politicians are in favor of Medicare and Medicaid, all are against a government health care program (â€Å"Republican Party (United States),† 2014). â€Å"We oppose government-run health care, which won’t protect the physician-patient relationship, won’t promote competition, and won’t promote health care quality and choice† (â€Å"2012 Republican Platform,† 2013). Republicans also state that government healthcare is used as a method to gain governmental power. For example, many Republicans believe that Obamacare was never really about health, but about government power. Through it, Obama would have taken control of over one-sixth of the economy. Also, if it is fully implemented, Republicans predict that it would itself collapse, demonstrating the inefficiency and uselessness of government healthcare (â€Å"Republican Party on Health Care,† 2013). When it comes to their foreign policy, the Republican Party holds a very proactive stance. In general, most Republicans believe that peace is best acquired though having a strong military. For example, the current Obama Administration wants to cut the members of the military by about 100,000, but Republicans seek to raise the number by that much! (â€Å"Republicans seek to add more in defense spending,† 2014). Further, Republicans acknowledge that America is in a national security crisis. Many people do not realize that China and North Korea are building up long-distance weapons to fire on us; therefore, Republicans say a strong military is key to our safety. They do not however believe America should go policing everybody; instead America should regulate the world just enough to keep us safe (â€Å"John Bolton at CPAC,† 2014). The Republicans seek to completely curb terrorism. Republicans are almost always in agreement with sending American troops abroad to fight terrorist groups. However, when it comes to our homeland, Republicans are split. Some say the government should observe private phone calls and emails in an effort to tighten national security. Others say that this is unconstitutional and that it violates Americans’ right to privacy (â€Å"Differing Views on Terrorism,† 2006). Another point brought up by Republicans is that terrorists will be fighting us no matter where the location is, so it is best to keep to keep a presence in other parts of the world in order to keep the fighting overseas. And moreover, since terrorists do not negotiate and keep fighting to the end, we must annihilate them for any hope of peace (â€Å"Republican Party on War and Peace,† 2013). Republicans believe that America should have the strongest and most modernized nuclear stockpile in the world in an effort to deter any attacks. The GOP thinks that the only way to stop a nuclear war is if all nations reduce or eliminate their nuclear stockpiles. They also know that if America takes the front of this movement, America must keep enough nuclear weapons to deter any other nation. They are worried because the Obama Administration has abandoned America’s nuclear force. This puts America in a vulnerable spot compared to the rest of the world. Also, by abandoning our missile bases in Poland and the Czech Republic, the current administration is undermining America’s missile defense. With nations developing nuclear missiles that can reach the U.S., Republicans state that it is foolish to undermine our own missile shield (â€Å"What Does Your†¦,† 2012). Through their conservative platform, Republicans seek restore liberty and prosperity to America. Founded on Christian morals and principles, the GOP seeks to use its conservative stance to draw American’s back from the invading concept of social liberalism. As the economy of America is rapidly degrading, the Republican Party is trying to reform the government to bring back America’s prosperity. And by having a strong military presence in the world, Republicans hope to make the world a safer place for our nation. As expressed by the GOP themselves, â€Å"The Party’s core principles of freedom and equal opportunity are as relevant today as at our founding, and they are the roadmap for American renewal in a new and interconnected world† (â€Å"Our History,† 2013). Bibliography 2012 Republican National Convention. â€Å"2012 Republican Platform.† 2013. http://www.gop.com/2012-republican-platform_home/ (accessed Feb. 25, 2014). Breitbart. â€Å"John Bolton at CPAC: Replace Obamas Drift, Decline, and Defeatism with Reaganite Peace Through Strength.† 6 March 2014. http://www.breitbart.com/Big-Government/2014/03/06/John-Bolton-at-CPAC-Replace-Obama-s-Drift-Decline-and-Defeatism-with-Reaganite-Peace-Through-Strength (accessed Mar. 28,2014). Dan Balz and Claudia Deane. â€Å"Differing Views on Terrorism.† 2006. http://www.washingtonpost.com/wp-dyn/content/article/2006/01/10/AR2006011001192.html (accessed Mar. 26, 2014). Eyler Robert Coates, Sr. â€Å"Jefferson Perspective: Bureaucracies.† 1996. http://eyler.freeservers.com/JeffPers/jefpco34.htm (accessed Mar. 28, 2014). GOP.gov. â€Å"Energy – The All-American Plan.† http://www.gop.gov/energy/ (accessed Mar. 21, 2014). On The Issues. â€Å"Republican Party on Budget and Economy.† 11 October 2013. http://www.ontheissues.org/Celeb/Republican_Party_Budget_+_Economy.htm (accessed Mar. 23, 2014). On The Issues. â€Å"Republican Party on Education.† 11 October 2013. http://www.ontheissues.org/Celeb/Republican_Party_Education.htm (accessed Mar. 19, 2014). On The Issues. â€Å"Republican Party on Government Reform.† 11 October 2013. http://www.ontheissues.org/celeb/Republican_Party_Government_Reform.htm (accessed Mar. 23, 2014). On The Issues. â€Å"Republican Party on Gun Control.† 11 October 2013. http://www.ontheissues.org/Celeb/Republican_Party_Gun_Control.htm (accessed Mar. 24,2014). On The Issues. â€Å"Republican Party on Health Care.† 11 October 2013. http://www.ontheissues.org/celeb/Republican_Party_Health_Care.htm (accessed Mar. 23,2014). On The Issues. â€Å"Republican Party on the Issues.† 2013. http://www.ontheissues.org/Republican_Party.htm (accessed Mar. 19, 2014). On The Issues. â€Å"Republican Party on War and Peace.† 11 October 2013. http://www.ontheissues.org/celeb/Republican_Party_War_+_Peace.htm (accessed Mar. 26, 2014). On The Issues. â€Å"Republican Party on Welfare and Poverty.† 11 October 2013. http://www.ontheissues.org/celeb/Republican_Party_Welfare_+_Poverty.htm (accessed Mar. 23, 2014). Republican National Convention. â€Å"Our History.† 2013. http://www.gop.com/our-party/our-history/ (accessed Apr. 11, 2014). RNC for Life. â€Å"The Republican Party is the Pro-Life Party.† 2001. http://www.rnclife.org/brochure/rprolife.html (accessed Mar. 21, 2014). Waging Peace Today. â€Å"What Does Your Political Party Say About Nuclear Weapons.† 12 September 2012. http://wagingpeacetoday.blogspot.com/2012/09/what-does-your-political-party-say.html (accessed Mar. 26, 2014). Walter Pincus. â€Å"Republicans seek to add more in defense spending.† 2014. http://www.washingtonpost.com/world/national-security/republicans-seek-to-add-more-in-defense-spending/2012/05/07/gIQAKiq48T_story.html (accessed Mar. 28, 2014). Wikipedia. â€Å"Republican Party (United States).† 24 February 2014. http://en.wikipedia.org/wiki/Republican_Party_(United_States) (accessed Feb. 25, 2014). Wikipedia. â€Å"Student Debt.† 2014. http://en.wikipedia.org/wiki/Student_debt (accessed Apr. 3, 2014).

Saturday, January 18, 2020

Microprocessor and Interfacing

UNIT II- Peripherals and Interfacing PIO 8255 The parallel input-output port chip 8255 is also called as programmable peripheral input-output port. The Intel’s 8255 is designed for use with Intel’s 8-bit, 16-bit and higher capability microprocessors. It has 24 input/output lines which may be individually programmed in two groups of twelve lines each, or three groups of eight lines. The two groups of I/O pins are named as Group A and Group B. Each of these two groups contains a subgroup of eight I/O lines called as 8-bit port and another subgroup of four lines or a 4-bit port.Thus Group A contains an 8-bit port A along with a 4-bit port. C upper. PIO 8255 †¢ The port A lines are identified by symbols PA0-PA7 while the port C lines are identified as PC4-PC7. Similarly, GroupB contains an 8-bit port B, containing lines PB0-PB7 and 4-bit port C with lower bits PC0- PC3. The port C upper and port C lower can be used in combination as an 8-bitport C. †¢ Both the por t C are assigned the same address. Thus one may have either three 8-bit I/O ports or two 8-bit and two 4-bit ports from 8255. All of these ports can function independently either as input or as output ports.This can be achieved by programming the bits of an internal register of 8255 called as control word register ( CWR ). PIO 8255 †¢ The internal block diagram and the pin configuration of 8255 are shown in fig. †¢ The 8-bit data bus buffer is controlled by the read/write control logic. The read/write control logic manages all of the internal and external transfers of both data and control words. †¢ RD, WR, A1, A0 and RESET are the inputs provided by the microprocessor to the READ/ WRITE control logic of 8255. The 8-bit, 3-state bidirectional buffer is used to interface the 8255 internal data bus with the external system data bus.PIO 8255 †¢ This buffer receives or transmits data upon the execution of input or output instructions by the microprocessor. The contro l words or status information is also transferred through the buffer. †¢ The signal description of 8255 are briefly presented as follows : †¢ PA7-PA0: These are eight port A lines that acts as either latched output or buffered input lines depending upon the control word loaded into the control word register. †¢ PC7-PC4 : Upper nibble of port C lines. They may act as either output latches or input buffers lines. PIO 8255 This port also can be used for generation of handshake lines in mode 1 or mode 2. †¢ PC3-PC0 : These are the lower port C lines, other details are the same as PC7-PC4 lines. †¢ PB0-PB7 : These are the eight port B lines which are used as latched output lines or buffered input lines in the same way as port A. †¢ RD : This is the input line driven by the microprocessor and should be low to indicate read operation to 8255. †¢ WR : This is an input line driven by the microprocessor. A low on this line indicates write operation. PIO 8255 †¢ CS : This is a chip select line.If this line goes low, it enables the 8255 to respond to RD and WR signals, otherwise RD and WR signal are neglected. †¢ A1-A0 : These are the address input lines and are driven by the microprocessor. These lines A1-A0 with RD, WR and CS from the following operations for 8255. These address lines are used for addressing any one of the four registers, i. e. three ports and a control word register as given in table below. †¢ In case of 8086 systems, if the 8255 is to be interfaced with lower order data bus, the A0 and A1 pins of 8255 are connected with A1 and A2 respectively.RD 0 0 0 0 RD 1 1 1 1 RD X 1 WR 1 1 1 1 WR 0 0 0 0 WR X 1 CS 0 0 0 0 CS 0 0 0 0 CS 1 0 A1 0 0 1 1 A1 0 0 1 1 A1 X X A0 0 1 0 1 A0 0 1 0 1 A0 X X Input (Read) cycle Port A to Data bus Port B to Data bus Port C to Data bus CWR to Data bus Output (Write) cycle Data bus to Port A Data bus to Port B Data bus to Port C Data bus to CWR Function Data bus tristated Data bu s tristated Control Word Register PIO 8255. †¢ D0-D7 : These are the data bus lines those carry data or control word to/from the microprocessor. †¢ RESET : A logic high on this line clears the control word register of 8255.All ports are set as input ports by default after reset. Block Diagram of 8255 (Architecture) ( cont.. ) †¢ 1. 2. 3. 4. †¢ It has a 40 pins of 4 groups. Data bus buffer Read Write control logic Group A and Group B controls Port A, B and C Data bus buffer: This is a tristate bidirectional buffer used to interface the 8255 to system databus. Data is transmitted or received by the buffer on execution of input or output instruction by the CPU. Control word and status information are also transferred through this unit. †¢ Block Diagram of 8255 (Architecture) ( cont.. )Read/Write control logic: This unit accepts control signals ( RD, WR ) and also inputs from address bus and issues commands to individual group of control blocks ( Group A, Group B). †¢ It has the following pins. a) CS – Chipselect : A low on this PIN enables the communication between CPU and 8255. b) RD (Read) – A low on this pin enables the CPU to read the data in the ports or the status word through data bus buffer. †¢ Block Diagram of 8255 (Architecture) ( cont.. ) WR ( Write ) : A low on this pin, the CPU can write data on to the ports or on to the control register through the data bus buffer. ) RESET: A high on this pin clears the control register and all ports are set to the input mode e) A0 and A1 ( Address pins ): These pins in conjunction with RD and WR pins control the selection of one of the 3 ports. †¢ Group A and Group B controls : These block receive control from the CPU and issues commands to their respective ports. c) Block Diagram of 8255 (Architecture) ( cont.. ) †¢ Group A – PA and PCU ( PC7 -PC4) †¢ Group B – PCL ( PC3 – PC0) †¢ Control word register can only be written int o no read operation of the CW register is allowed. a) Port A: This has an 8 bit latched/buffered O/P and 8 bit input latch. It can be programmed in 3 modes – mode 0, mode 1, mode 2. b) Port B: This has an 8 bit latched / buffered O/P and 8 bit input latch. It can be programmed in mode 0, mode1. Block Diagram of 8255 (Architecture). c) Port C : This has an 8 bit latched input buffer and 8 bit out put latched/buffer. This port can be divided into two 4 bit ports and can be used as control signals for port A and port B. it can be programmed in mode 0. Modes of Operation of 8255 (cont.. ) †¢ These are two basic modes of operation of 8255.I/O mode and Bit Set-Reset mode (BSR). †¢ In I/O mode, the 8255 ports work as programmable I/O ports, while in BSR mode only port C (PC0-PC7) can be used to set or reset its individual port bits. †¢ Under the I/O mode of operation, further there are three modes of operation of 8255, so as to support different types of applications, mode 0, mode 1 and mode 2. Modes of Operation of 8255 (cont.. ) †¢ BSR Mode: In this mode any of the 8-bits of port C can be set or reset depending on D0 of the control word. The bit to be set or reset is selected by bit select flags D3, D2 and D 1 of the CWR as given in table. I/O Modes : a) Mode 0 ( Basic I/O mode ): This mode is also called as basic input/output mode. This mode provides simple input and output capabilities using each of the three ports. Data can be simply read from and written to the input and output ports respectively, after appropriate initialisation. D3 0 0 0 0 1 1 1 1 D2 0 0 1 1 0 0 1 1 D1 0 1 0 1 0 1 0 1 Selected bits of port C D0 D1 D2 D3 D4 D5 D6 D7 BSR Mode : CWR Format PA 8 2 5 5 PCU PCL PA6 – PA7 PC4 – PC7 PC0-PC3 PB PB0 – PB7 8 2 5 5 PA PCU PCL PB PA PC PB0 – PB7 All Output Port A and Port C acting as O/P. Port B acting as I/PMode 0 Modes of Operation of 8255 (cont.. ) †¢ 1. The salient features of this mode are a s listed below: Two 8-bit ports ( port A and port B )and two 4-bit ports (port C upper and lower ) are available. The two 4-bit ports can be combinedly used as a third 8-bit port. Any port can be used as an input or output port. Output ports are latched. Input ports are not latched. A maximum of four ports are available so that overall 16 I/O configuration are possible. All these modes can be selected by programming a register internal to 8255 known as CWR. 2. 3. 4. †¢ Modes of Operation of 8255 (cont.. †¢ The control word register has two formats. The first format is valid for I/O modes of operation, i. e. modes 0, mode 1 and mode 2 while the second format is valid for bit set/reset (BSR) mode of operation. These formats are shown in following fig. D7 1 D6 X D5 X D4 X D3 D2 D1 D0 0- Reset 0-for BSR mode Bit select flags D3, D2, D1 are from 000 to 111 for bits PC0 TO PC71- Set I/O Mode Control Word Register Format and BSR Mode Control Word Register Format PA3 PA2 PA1 PA0 R D CS GND A1 A0 PC7 PC6 PC5 PC4 PC0 PC1 PC2 PC3 PB0 PB1 PB2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 0 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 PA4 PA5 PA6 PA7 WR Reset D0 D1 D2 D3 D4 D5 D6 D7 Vcc PB7 PB6 PB5 PB4 PB3 8255A 8255A Pin Configuration = D0-D7 CS RESET 8255A A0 A1 RD PA0-PA7 PC4-PC7 PC0-PC3 PB0-PB7 Vcc WR GND Signals of 8255 3 Group A control 1 D0-D7 Data bus Buffer 8 bit int data bus 4 Group A Port A(8) PA0-PA7 Group A Port C upper(4) Group B Port C Lower(4) PC7-PC4 PC0-PC3 2 RD WR A0 A1 RESET CS Block Diagram of 8255 READ/ WRITE Control Logic Group B control PB7-PB0 Group B Port B(8) D7 D6 D5 Mode for Port A D4 PA D3 PC U D2 Mode for PB D1 PB D0 PC LMode Set flag 1- active 0- BSR mode Group – A 1 Input PC u 0 Output 1 Input PA 0 Output 00 – mode 0 Mode 01 – mode 1 Select of PA 10 – mode 2 Group – B PCL PB Mode Select 1 Input 0 Output 1 Input 0 Output 0 mode- 0 1 mode- 1 Control Word Format of 8255 Modes of Oper ation of 8255 (cont.. ) b) Mode 1: ( Strobed input/output mode ) In this mode the handshaking control the input and output action of the specified port. Port C lines PC0-PC2, provide strobe or handshake lines for port B. This group which includes port B and PC0-PC2 is called as group B for Strobed data input/output. Port C lines PC3-PC5 provide strobe lines for port A.This group including port A and PC3-PC5 from group A. Thus port C is utilized for generating handshake signals. The salient features of mode 1 are listed as follows: Modes of Operation of 8255 (cont.. ) 1. 2. 3. 4. Two groups – group A and group B are available for strobed data transfer. Each group contains one 8-bit data I/O port and one 4-bit control/data port. The 8-bit data port can be either used as input and output port. The inputs and outputs both are latched. Out of 8-bit port C, PC0-PC2 are used to generate control signals for port B and PC3-PC5 are used to generate control signals for port A. he lines PC6, PC7 may be used as independent data lines. Modes of Operation of 8255 (cont.. ) †¢ The control signals for both the groups in input and output modes are explained as follows: Input control signal definitions (mode 1 ): †¢ STB( Strobe input ) – If this lines falls to logic low level, the data available at 8-bit input port is loaded into input latches. †¢ IBF ( Input buffer full ) – If this signal rises to logic 1, it indicates that data has been loaded into latches, i. e. it works as an acknowledgement. IBF is set by a low on STB and is reset by the rising edge of RD input.Modes of Operation of 8255 (cont.. ) †¢ INTR ( Interrupt request ) – This active high output signal can be used to interrupt the CPU whenever an input device requests the service. INTR is set by a high STB pin and a high at IBF pin. INTE is an internal flag that can be controlled by the bit set/reset mode of either PC4 (INTEA) or PC2(INTEB) as shown in fig. †¢ INTR is reset by a falling edge of RD input. Thus an external input device can be request the service of the processor by putting the data on the bus and sending the strobe signal. Modes of Operation of 8255 (cont.. Output control signal definitions (mode 1) : †¢ OBF (Output buffer full ) – This status signal, whenever falls to low, indicates that CPU has written data to the specified output port. The OBF flip-flop will be set by a rising edge of WR signal and reset by a low going edge at the ACK input. †¢ ACK ( Acknowledge input ) – ACK signal acts as an acknowledgement to be given by an output device. ACK signal, whenever low, informs the CPU that the data transferred by the CPU to the output device through the port is received by the output device.Modes of Operation of 8255 (cont.. ) †¢ INTR ( Interrupt request ) – Thus an output signal that can be used to interrupt the CPU when an output device acknowledges the data received from the CPU. INTR is set when ACK, OBF and INTE are 1. It is reset by a falling edge on WR input. The INTEA and INTEB flags are controlled by the bit set-reset mode of PC 6and PC2 respectively. 1 0 1 0 Input control signal definitions in Mode 1 1/0 X X X 1 X X X X 1 1 X D7 D6 D5 D4 D3 D2 D1 D0 1 – Input 0 – Output For PC6 – PC7 PA0 – PA7 INTEA PC4 PC5 STBA IBFA D7 D6 D5 D4 D3 D2 D1 D0PB0 – PB7 INTEB PC 2 PC1 STBB IBFB PC3 RD PC6 – PC7 INTRA I/O PC0 INTR A Mode 1 Control Word Group A I/P RD Mode 1 Control Word Group B I/P STB IBF INTR RD DATA from Peripheral Mode 1 Strobed Input Data Transfer WR OBF INTR ACK Data OP to Port Mode 1 Strobed Data Output Output control signal definitions Mode 1 1 0 1 0 1/0 X X X 1 X X X X 1 0 X D7 D6 D5 D4 D3 D2 D1 D0 1 – Input 0 – Output For PC4 – PC5 PA0 – PA7 INTEA PC7 PC6 OBF ACKA D7 D6 D5 D4 D3 D2 D1 D0 PB0 PB7 INTEB PC PC2 1 OBFB ACKB PC3 WR PC4 – PC5 PC0 INTRA I/O INTRB Mode 1 Control Word Gr oup AMode 1 Control Word Group B Modes of Operation of 8255 (cont.. ) †¢ Mode 2 ( Strobed bidirectional I/O ): This mode of operation of 8255 is also called as strobed bidirectional I/O. This mode of operation provides 8255 with an additional features for communicating with a peripheral device on an 8-bit data bus. Handshaking signals are provided to maintain proper data flow and synchronization between the data transmitter and receiver. The interrupt generation and other functions are similar to mode 1. †¢ In this mode, 8255 is a bidirectional 8-bit port with handshake signals.The RD and WR signals decide whether the 8255 is going to operate as an input port or output port. Modes of Operation of 8255 (cont.. ) †¢ 1. 2. 3. 4. 5. The Salient features of Mode 2 of 8255 are listed as follows: The single 8-bit port in group A is available. The 8-bit port is bidirectional and additionally a 5-bit control port is available. Three I/O lines are available at port C. ( PC2 â⠂¬â€œ PC0 ) Inputs and outputs are both latched. The 5-bit control port C (PC3-PC7) is used for generating / accepting handshake signals for the 8-bit data transfer on port A.Modes of Operation of 8255 (cont.. ) †¢ Control signal definitions in mode 2: †¢ INTR – (Interrupt request) As in mode 1, this control signal is active high and is used to interrupt the microprocessor to ask for transfer of the next data byte to/from it. This signal is used for input ( read ) as well as output ( write ) operations. †¢ Control Signals for Output operations: †¢ OBF ( Output buffer full ) – This signal, when falls to low level, indicates that the CPU has written data to port A. Modes of Operation of 8255 (cont.. ) ACK ( Acknowledge ) This control input, when falls to logic low level, acknowledges that the previous data byte is received by the destination and next byte may be sent by the processor. This signal enables the internal tristate buffers to send the next data byte on port A. †¢ INTE1 ( A flag associated with OBF ) This can be controlled by bit set/reset mode with PC6 . †¢ Control signals for input operations : †¢ STB (Strobe input ) A low on this line is used to strobe in the data into the input latches of 8255. Modes of Operation of 8255 (cont.. ) †¢ IBF ( Input buffer full ) When the data is loaded into input buffer, this ignal rises to logic ‘1’. This can be used as an acknowledge that the data has been received by the receiver. †¢ The waveforms in fig show the operation in Mode 2 for output as well as input port. †¢ Note: WR must occur before ACK and STB must be activated before RD. WR OBF INTR ACK STB IBF Data bus RD Mode 2 Bidirectional Data Transfer Data from 8085 Data towards 8255 Modes of Operation of 8255 (cont.. ) †¢ The following fig shows a schematic diagram containing an 8-bit bidirectional port, 5-bit control port and the relation of INTR with the control pins. Port B ca n either be set to Mode 0 or 1 with port A( Group A ) is in Mode 2. Mode 2 is not available for port B. The following fig shows the control word. †¢ The INTR goes high only if either IBF, INTE2, STB and RD go high or OBF, INTE1, ACK and WR go high. The port C can be read to know the status of the peripheral device, in terms of the control signals, using the normal I/O instructions. D7 1 D6 1 D5 X D4 X D3 X D2 1/0 D1 1/0 D0 1/0 1/0 mode Port A mode 2 Port B mode 0-mode 0 1- mode 1 PC2 – PC0 1 – Input 0 – Output Port B 1- I/P 0-O/P Mode 2 control word PC3 PA0-PA7 INTR INTE 1 PC7 PC6 OBF ACK STB IBF 3 I/O INTE 2 RD WR PC4 PC5 Mode 2 pins

Friday, January 10, 2020

Photography term paper

â€Å"Photography can only represent the present. Once photographed, the subject becomes part of the past† (Abbott, Bernice). Since the beginning of time humans have tried to commemorate their existence and one of the ways we have done so is through photography. Photography can be found anywhere. One of the most common places you can find photography is in a museum; which is where my story begins.As I entered the doors of the Museum of Photography at the University of Riverside I was transported through time. I was taken back to a time when hydrotherapy was nearly a budding phenomenon. A time where the mention of daguerreotype; a picture made on a mirror-like surface, would stop people dead in their tracks. A time where death; as tragic as it was, was celebrated as art. The time of Post-Mortem photography.As I ventured deeper into the world of Post-Mortem photography, I quickly discovered that Post- Mortem photography meant photography of the deceased. I immediately questioned the photographers' motives and was hesitant to except their works as art. However, as I continued to examine and observe I realized that these photographs weren't as horrific as I had made them UT to be. In fact, they were quite beautiful; In that they leave something behind for the living to hold on to.As I continued through the halls of the museum I found several other photographs whose subjects were living. I favored these photographs over the other photographs because they were much more cheerful. Throughout my exploration of the museum In total there were four photographs that stood out to me. Photography term paper By zoologically out to be. In fact, they were quite beautiful; in that they leave something behind for exploration of the museum in total there were four photographs that stood out to me.

Thursday, January 2, 2020

The Civil Rights Act in Modern Society - Free Essay Example

Sample details Pages: 5 Words: 1625 Downloads: 3 Date added: 2017/06/26 Category Law Essay Type Analytical essay Tags: Act Essay Civil Rights Movement Essay Did you like this example? CIVIL RIGHTS ACT1 Civil Right Act In todayà ¢Ã¢â€š ¬Ã¢â€ž ¢s rapid changing world, the mobility of labor has increased tremendously. In the past, it was common to find towns with inhabitants from one race. Issues of discrimination at work were rare due to the uniformity. Don’t waste time! Our writers will create an original "The Civil Rights Act in Modern Society" essay for you Create order Today, workplaces enjoy diversity. It is common to find an office where the secretary is from Hispanic origin, the manager an African America, and the HR officer a person from Caucasian descent. This diversity should create an environment that allows people to exchange ideas that benefit the company and the society. However, the differences in the workplace have a problem of their own. One of the problems is equal opportunities regarding recruitment, appraisal, promotions, and salary increases. The differences in race, gender, age, and levels of education create tensions in the work environment. Gelato Cheese Company is in such a situation. Heartland Corners has a population that is 25% African American and 50% Caucasian. Asian Americans and Hispanic Americans share the remaining percentage. The primary education requirement for the cleaning position at Gelato is a high school diploma. 75% of the Caucasians have completed high school. However, only 25% of the minority groups have a high school diploma. A look at the cleaning crew reveals that Gelato only has white cleaners. Since 25% of the minority group have high school diplomas, one should expect that 25% of the cleaning staff consists of members from that group. This is a violation of the 1964 Civil Rights Act. In order to understand how Gelato violates the act, one has to know its origin and content. The Act has its origin in a bill that President John F. Kennedy introduced in a civil rights speech on June 11, 1963. In the speech, he proposed a law that gave all citizens the right to frequent facilities open to the public (Miller, Gyung-Ho, Sened, 2008). Such facilities included retail stores, theaters, hotels, and restaurants. He also called for a law that protected the right to vote. President Kennedy gave this speech following a campaign in Birmingham, in which police attacked students with pressure fire hoses and dogs for protesting against discrimination. The bill founds its way to congress. On e year later, President Johnson signed it into law and it became the Civil Right Act of 1964 (Loevy, 1990). The law banned discrimination based on sex, color, race, origin, and religion. It eliminated inequality in voter registration requirements, racial discrimination in learning institutions, and at workstations. The law also outlawed segregation in facilities that provided services to the public. The law had ten features. These included voting rights, public accommodations, desegregation of public venues, desegregation of education, non-discrimination in federal programs, and establishment of a civil rights commission (Whalen Whalen, 1985). Other features included changes in voter registration and statistics, intervention of cases involving violation of civil rights, establishment of a community relations program, and equal employment opportuneness. Title VII of the act speaks about equal employment opportunities. The section prohibits employers from practicing discriminative HR practices. Title VII bars employers from discriminating in relation to compensation, hiring, employment privileges, and discharging employees. It also makes it illegal for labor unions to base their membership on color, race, origin, and color. Title VII applies to firms with more than 15 workers, employment agencies, and labor organizations (Pedriana Stryker, 2004). Gelatoà ¢Ã¢â€š ¬Ã¢â€ž ¢s central plant has one hundred employees. This makes it a genuine employer (more than 15 workers). This means that the contents of the act apply to it. The absence of workers from other races in the cleaning department provides grounds for a lawsuit against Gelato. The civil rights group would argue that Gelato broke the Civil Right Act by failing to provide equal opportunities in employment. It would argue that if Gelato were an equal opportunity employer, the cleaning unit would have at least 25% of the team coming from the minority groups. A look at some cases reveals that some companies also suffered the same consequence for failing to adhere to the act. In 1971 case of Griggs v. Duke Power Co., the court rules that Duke Power Company violated the Civil Rights Act. It did this through intentional position discrimination and employer practices that affected minorities and women negatively (The Leadership Conference, 2014). The Supreme Court concluded that the power company conducted tests that disproportionately locked out African American job applicants. The court also found out that these tests had no relation to the job. In addition, the court found out that the firm had employment practices that discriminated agent African Americans (LDF, 2014). The court prompted the utility company to change its employment practices. The 1987 case of United States v. Paradise also paints a similar picture. In this case, the court found the defendant to discriminate against African Americans in promotions. It held that the employer should implement a one-for-one requirement. T his means that for every white employee that got a promotion, a competent back worker would also get one. The court held that this action would eliminate the impact of long-term discrimination in Alabama (Supreme Observer, 2013). In my opinion, Gelato should make some changes to its structure to comply with the requirements of Title VII of the Civil Rights Act. The lack of minority workers in the cleaning department seems unintentional since the education requirement of a high school applies to all races. This is a disparate impact. Disparate impact involves a situation where an organization unintentionally discriminated against race or gender by using standard requirements for all applicants (Biddle, 2011). It leads to a significant difference employment results. In Gelatoà ¢Ã¢â€š ¬Ã¢â€ž ¢s case, it led to an all-white cleaning team. However, absence of qualified minority workers in the department signifies that the firm is on the wrong side of the act. The first step that Gela to should take to adhere to the law is applying job requirements uniformly and consistently. Even if applicants apply for a requirement that is not essential for business needs, that provision is unlawful if it excludes people of a particular race. Gelato should also institute measures to prevent illegal practices. Examples of such practices include receiving applications from one source, asking for an education background with no relevance to job performance, and testing applicants for skills that have no relation to the job. The HR department should also use affirmative action in its selection of workers. The reason for this is that white applicants are the majority. Affirmative action would ensure Gelato overcomes unintentional discrimination and complies with the act. When the firm institutes affirmative action, it should avoid classifying and segregating its employees. This means that it should avoid assigning African-Americans to predominantly black neighborhoods. For example, the African American drivers that deliver the processed cheese around the town should serve white and black areas. ADEA applies to both workers and job applicants. With regards to job advertisements and notices, ADEA makes it unlawful for firms to include age limitations and preference. The law also states that when an employer asks the applicant his age, the purpose of that information should be legal (Rodriguez Weingast, 2003). The act only allows the company to reduce benefits to older workers if it reduces benefits for young workers. An example of case law that applies to ADEA is the 1998 case of Morelli v. Cedel (Find US Law, 2008). In this case, the court stated that ADEA applies to firms that have more than 20 workers operating overseas. In the case, the plaintiff sued the defendant for failing to release her pension after she resigned. She sued the firm on the ground that it violated the IDEA by terminating her contract without paying her pension. The plaintiff argued t hat it did not qualify under ADEA since it had a workforce of less than 20 in America. However, it had other employees that worked as expatriates in foreign countries. The court decided that the number of foreign workers made the firm subject to ADEA. The 2008 Gomez-Perez v. Potter case also shows how ADEA applies. The plaintiff sued the defendant after he denied her a promotion based on her age. A look at Gelato also reveals that it is against the ADEA. The decree prevents employers from discriminating on the basis of age. It prohibits discrimination in hiring, job notices that have an age preference, mandatory retirement, and denial of benefits to senior workers. Gelato has a workforce where 85% is below 35 years. The company falls under the act since it has more than 20 employees. References Biddle, D. (2011). Adverse Impact And Test Validation: A Practitioners Guide to Valid And Defensible Employment Testing. Hants, England: Gower Technical Press. Retrieved November 6, 2014 Find US Law. (2008). Morelli v. Cedel (2nd Cir. 1998) 141 F3d 39, 45. Retrieved from Find US Law: https://finduslaw.com/morelli-v-cedel-2nd-cir-1998-141-f3d-39-45 LDF. (2014). Landmark: Griggs v. Duke Power Co. Retrieved from NAACP Legal Defense and Educational Fund: https://www.naacpldf.org/case/griggs-v-duke-power-co Loevy, R. D. (1990). To End All Segregation: The Politics of the Passage of The Civil Rights Act of 1964. Lanham: University Press of America. Miller, G. J., Gyung-Ho, J., Sened, I. (2008). Closing the Deal: Negotiating Civil Rights Legislation. American Political Science Review, 100-103. Pedriana, N., Stryker, R. (2004, November). The Strength of a Weak Agency: Enforcement of Title VII of the 1964 Civil Rights Act and the Expansion of State Capacity, 1965-1971. Amer ican Journal of Sociology, 110(3), 709à ¢Ã¢â€š ¬Ã¢â‚¬Å"760. Rodriguez, D. B., Weingast, B. R. (2003). The Positive Political Theory of Legislative History: New Perspectives on the 1964 Civil Rights Act and Its Interpretation. University of Pennsylvania Law Review, 151. Supreme Observer. (2013). United States v. Paradise . Retrieved from SupremeObserver: https://supremecourtobserver.com/case-report/?id=28570 The Leadership Conference. (2014). Key Supreme Court Cases for Civil Rights. Retrieved from The Leadership Conference: https://www.civilrights.org/judiciary/supreme-court/key-cases.html Whalen, C., Whalen, B. (1985). The Longest Debate: A Legislative History of the 1964 Civil Rights Act. Seven Locks Press.