programming the parallel port

... Components 20 Chapter 3 The Parallel Printer Adapter 25 Anatomy of the Parallel Printer Port 26 The DATA Port 29 The CONTROL Port 31 The STATUS Port 33 Printing with the Parallel Adapter 36 Using the Parallel ... 3 discusses the history of the parallel printer adapter and describes the details of the standard parallel port. Chapter 4 describes programming considerations for the parallel port. This chapter ... as to the outputs of the CONTROL port. The outputs of the CONTROL port are connected to the LEDs through a set of two-way jumpers that allow the CONTROL port signals to either connect to the LEDS...

Ngày tải lên: 04/11/2013, 18:15

Ngày tải lên: 22/01/2014, 11:20

... set up the serial port myPort.setSerialPortParams(BAUD, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE); break; case CommPortIdentifier .PORT _PARALLEL: thePort = thePortID.open("DarwinSys ... told if another application wants to use the port. Then you can either close the port and the other application will get it, or ignore the request and the other program will get a PortInUseException, as ... reserved. /** The chosen Port Identifier */ CommPortIdentifier thePortID; /** The chosen Port itself */ CommPort thePort; public static void main(String[] argv) throws IOException, NoSuchPortException, PortInUseException, UnsupportedCommOperationException...

Ngày tải lên: 27/10/2013, 14:15

... whether the other device connected, Interfacing the Standard Parallel Port http://www.senet.com.au/~cpeacock Interfacing the Standard Parallel Port Page 1 Interfacing the Standard Parallel Port Disclaimer ... from the Parallel Port. Interfacing the Standard Parallel Port http://www.senet.com.au/~cpeacock Interfacing the Standard Parallel Port Page 10 then it may be unnecessary. If however you don’t bother ... write the byte of data to the I/O port. The hardware will check to see if the printer is busy, generate the strobe. Note that this mode commonly doesn’t check the nAck either. Port Addresses The Parallel...

Ngày tải lên: 12/12/2013, 04:15

... for the creation of the part of the portlet URL that references the portlet in the portal page, and for parsing the portlet URL into parameters for the portlet request. The portlet creates PortletURL objects ... URLs. A portlet URL will reference the instance of the portlet in the portal page—if there are two portlets on the page with the same class, they will have different portlet URLs. The portal container ... from the portal sends one action request to the portlet that supplied the URL, and then after the portlet finishes processing the action request, the portal sends render requests to all of the portlets...

Ngày tải lên: 20/08/2012, 11:54

... describes the standard configuration information available to a portal and the portlets it contains. It discusses • The PortalContext class • Portal properties • Window states and portlet modes ... components from different vendors into a portal from any vendor. These components are portlets, and we explain how to build them in this book. The noble aim of the portlet specification—which arose ... developers as the servlet API has been because portlets make building a truly integrated system that much easier. Any new portal devel- opment projects should select a portal that supports the portlet...

Ngày tải lên: 05/10/2013, 04:20

... configurations—either the installation succeeded on all of them, or the changes were rolled back and the servers are left just as they were before you tried to install the product. Another benefit ... pbValid); The Name property contains the name of the object. For example, if the object is a COM+ application, the name will be the application's name. The Valid property returns TRUE if the ... Summary Programming the COM+ Catalog is nothing more than understanding the Catalog programming model and navigating down the Catalog structure, using the Component Services Explorer or the Catalog...

Ngày tải lên: 05/10/2013, 15:20

... painting the portrait of the woman he loved. And as he painted, he woman who loved him grew slowly weaker and sadder. "Several people saw the half-finished picture. They told the painter ... now. The painter did not see that the colours he was painting were no longer there in her real face. "Many more weeks passed until, one day, in the middle of winter, he finished the portrait. ... portrait was now hidden in darkness again. Quickly, I looked through the book until I found the story of the oval portrait. I read these words: "She was a beautiful young flower, and always...

Ngày tải lên: 14/10/2013, 17:11

... posted message becomes the next in the queue, the looper invokes DispatchMessage() to pass the message to the target handler. The effect is for the posted message to reach the target handler’s ... sev- eral examples of the creating of messages and the dispatching of these messages both by the object that created them and by other objects. Figure 9-1. The inheritance hierarchy for the Application ... NULL) The first parameter, message, is the BMessage object to post. The second parame- ter, handler, names the target handler the BHandler object to which the mes- sage is to be delivered. The...

Ngày tải lên: 17/10/2013, 19:15

... For the Save file panel, the display of the panel comes when the user chooses the Save As item from the File menu. In response to the message issued by the system to the appropriate MessageReceived() ... control is in the hands of the user. Once the user confirms a choice (whether it’s a file selection in the Open file panel, a click on the Save button in the Save file panel, or a click on the Can- cel ... The other parameters are worthy of a little explanation. The second argument, target, is used to define the target of the message the sys- tem will deliver to the application in response to the...

Ngày tải lên: 20/10/2013, 10:15

... together so that they can be easily searched and referenced. For example, the System.Data namespace contains the classes that constitute the ADO .NET architecture. The System.Xml namespace is the ... namespace for the XML classes that provide standards-based support for processing XML. The System Namespace The System namespace is the root namespace for types in the .NET Framework. The System ... introduce themselves, addressing the bulleted items on the slide. Delivery Tip As students introduce themselves, use a white board or flip chart to record their expectations of the course....

Ngày tải lên: 22/10/2013, 16:15

... the parallel port. On older systems, the parallel port is on an expansion card with the video adapter. These should include a way to dis- able the video adapter, so you can use the parallel port ... covers the new port types in detail, but for now, here is a summary of the available types: Original (SPP) The parallel port in the original IBM PC, and any port that emulates the original port& apos;s ... this reason, every port should come with a simple way to configure the port. If the port is on the motherboard, look in the CMOS setup screens that you can access on bootup. Other ports may use jumpers...

Ngày tải lên: 15/12/2013, 13:15

... current, and if your parallel port has weak outputs, you may have problems in using other devices on the same port as the key. Alternatives to the Parallel Port The parallel port is just one of ... introduces the parallel port& apos;s signals and ways of accessing them in the programs you write. The Signals Parallel Port Complete Accessing Ports Table 2-1 shows the functions of each of the 25 ... Chapter 2 Table 2-1: Parallel Port Signals, arranged by pin number. The signal names in the tables are those used by the parallel port in the original IBM PC. The names describe the signals'...

Ngày tải lên: 15/12/2013, 13:15

... even if the port& apos;s circuits are located on the motherboard, because the CPU still uses the expansion bus's clock and control signals to access the parallel port. Figure 3-1 shows the timing ... a port takes six T-cycles. During T1, the CPU places the port address on SA0-SA19. These lines connect to the port& apos;s address-decoding circuits. (The port hardware usually decodes onl y the lower ... the falling edge of IOR (read I/O port) or IOW (write to 1/O port) , the port latches the address. Fo r a w rite operation, the CPU places the data on SDO-SD7, and on the rising edge of IOW, the...

Ngày tải lên: 15/12/2013, 13:15

... from one to the other. While the methods may be confusing, the mathematics behind them is the same for all. In this paper, you will learn some of the simpler ways to figure out many of the subnetting ... my grandmother made pies, she cut the pies in various configurations depending on the needs of the pie eaters. Often, the pie was cut with all pieces the same size. Other times she cut the slices ... don’t panic. The prefix is simply another way to state the mask. The prefix contains a count of the total number of 1 bits in the subnet mask. The conversion is quite simple. You can use the mask...

Ngày tải lên: 21/12/2013, 04:18

... with changes to the document over time. Language Support The Collaboration toolbar matches the language selected for the Office applications on the client (no SharePoint Portal Server code ... If there is no proxy server present, you must type the following: proxycfg -d Importing Web Parts You can import and export Web Parts locally as .dwp files. To import .dwp files, click the ... to them or link them to a URL that provides the code. To create the code for a Web Part, you should edit code in the source editor of your choice and then add it as embedded content to the...

Ngày tải lên: 21/12/2013, 06:15

Ngày tải lên: 24/12/2013, 19:15

Ngày tải lên: 24/12/2013, 19:15

Ngày tải lên: 24/12/2013, 19:15