character code, XOFF is generally represented using a character computing character or byte ... as XON XOFF specifically. However, it does provide four generic device control characters DC1 through ... and DC1, for use as XOFF and XON, respectively. This usage was copied by others, and is now a de facto standard . The keyboard equivalents of CTRL S for XOFF, and CTRL Q for XON, also derive from this usage. class wikitable XOFF XON representations in ASCII Code Meaning ASCII Decimal Dec Hexadecimal Hex Keyboard XOFF Pause transmission DC3 19 0x13 CTRL S XON Resume transmission DC1 17 0x11 CTRL ... , it sends XOFF to the other end. The other end receives the XOFF code, and suspends transmission ... sends XOFF to the computer. The software on the computer sees the XOFF, and temporarily stops sending ... sending data again. XOFF XON can be employed in both directions for example, two teleprinter s connected ..., 1960s and 70s . However, software flow control is not without its problems. Sending XOFF requires at least ... a higher level of firmware , which can cause further delays in XOFF response. Hardware flow control .... Finally, since the XOFF XON codes are sent in band, they cannot appear in the data being transmitted without being mistaken for flow control commands. Any data containing the XOFF XON codes thus ... the need to assert XOFF. XOFF XON are still sometimes used manually by computer operators, to pause ... emulator software generally implements XOFF XON support as a basic function. This generally includes ... the flow of data The XON XOFF protocol . In Configuring Systems for Terminals, Printers, and Other ... more details
Infobox Song See Wikipedia WikiProject Songs Name Scotty Doesn t Know Artist Lustra band Lustra Album Left for Dead Released February 22, 2006 Format Genre Pop punk Length 2 55 Label XOFF Records Writer Lustra Seealso EuroTrip Scotty Doesn t Know is a song that was written exclusively for the movie EuroTrip . It was written and performed by the American pop punk band Lustra band Lustra . It was eventually released in their 2006 Left for Dead album where it was heavily downloaded on iTunes . It peaked at 53 on the U.S. Billboard Pop 100, 39 on the Digital Songs and at 75 on the Hot 100, mainly due to the high amount of digital download sales. Content It is performed by the band Lustra band Lustra , but in the movie, the lead singer was portrayed by Matt Damon , whose character has surreptitiously stolen a girl from Scotty, hence the title and subject matter. The song contains numerous lewd references to how Scotty s girlfriend Fiona played by Kristin Kreuk has been cheating on him with Damon s character for an extended period of time. In the movie, the song becomes something of a popular phenomenon a week or so later in Bratislava , the song has been remix ed and is playing in a popular nightclub . By the end of the movie, it has become so widespread and presumably popular that Scotty s best friend Cooper is able to use it as his mobile phone cell phone ring tone . The song is noted by several characters in the film including Scotty s own family for having a catchy tune . Chart positions Scotty Doesn t Know debuted at 89 on the U.S. Billboard Pop 100 for the chart week of July 22, 2006. ref Billboard magazine Billboard , July 22, 2006 ref class wikitable sortable align left Chart 2006 align center Peak br position align left U.S. Billboard Pop 100 align center 53 align left U.S. Billboard Digital Songs align center 39 align left U.S. Billboard Hot 100 align center 75 References reflist Category 2006 songs 2000s rock song stub ... more details
long offset, y, yoff, ymax, x, xoff, xmax, ystart, realx unsigned long bufx, bufy, target unsigned ... 0 case 1 spread 0 FALSE yoff long 200 Pictor head.ysize yoff yoff 2 xoff long 320 Pictor head.xsize xoffxoff 2 ystart 0 xmax 320 ymax 200 break case 2 default if spread 0 TRUE && Pictor head.ysize 201 ... yoff 0 ystart bufy 400 else yoff long 400 Pictor head.ysize yoff yoff 2 ystart 0 xoff long 640 Pictor head.xsize xoffxoff 2 xmax 640 ymax 400 break for y ystart y bufy y , yoff offset y bufx target yoff xmax xoff for x 0 x bufx x rawbuffer target picScreenBuf offset offset target if Pictor head.pictortype ... more details
XOFF . Hardware flow control In common RS 232 there are pairs of control lines RS 232 RTS CTS RTS ... , and RTS CTS are raised for each block of data. Software flow control Oppositely, XON XOFF is usually ... more details
such as XON XOFF to control the flow of data. The XON XOFF characters are sent by the receiver ... s buffers approach capacity, the receiver sends the XOFF character to tell the sender to stop ... signals by printers, terminals, and computer systems. XON XOFF flow control is an example of inband ... and XOFF characters might appear in the data being sent, XON XOFF handshaking presents difficulties ..., XON XOFF flow control can be done on a 3 wire interface. Virtual serial ports main Virtual ... more details
Varicode is a Huffman coding Huffman code for use in PSK31 . It supports all ASCII characters, but the characters used most frequently have shorter codes. The space between characters is indicated by a 00 sequence, a variation of Fibonacci coding . Originally created for speeding up real time keyboard to keyboard exchanges over low Bandwidth computing bandwidth links, it is a very useful format to shrink text files. Varicode is freely available. ref cite web author Steven L Karty, N5SK title PSK31 Spec publisher ARRL Website url http www.arrl.org psk31 spec accessdate 18 Dec 2010 ref ref cite web title PSK31 A new radio teletype mode with a traditional philosophy author Peter Martinez, G3PLX url http det.bi.ehu.es jtpjatae pdf p31g3plx.pdf accessdate 18 Dec 2010 ref Limitations Varicode does not send true 8 bit ASCII bytes. Varicode provides somewhat weaker compression in languages other than English. Varicode table Control characters class wikitable style text align center Varicode Oct Dec Hex Abbr Description 1010101011 000 0 00 NUL Null character 1011011011 001 1 01 SOH Start of Header 1011101101 002 2 02 STX Start of Text 1101110111 003 3 03 ETX End of Text 1011101011 004 4 04 EOT End of transmission character End of Transmission 1101011111 005 5 05 ENQ Enquiry 1011101111 006 6 06 ACK Acknowledge character Acknowledgment 1011111101 007 7 07 BEL Bell character Bell 1011111111 010 8 08 BS Backspace 11101111 011 9 09 HT Tab key Horizontal Tab 11101 012 10 0A LF Line feed 1101101111 013 11 0B VT Vertical Tab 1011011101 014 12 0C FF Form feed 11111 015 13 0D CR Carriage return 1101110101 016 14 0E SO Shift Out and Shift In characters Shift Out 1110101011 017 15 0F SI Shift Out and Shift In characters Shift In 1011110111 020 16 10 DLE Data Link Escape 1011110101 021 17 11 DC1 Device Control 1 XON 1110101101 022 18 12 DC2 Device Control 2 1110101111 023 19 13 DC3 Device Control 3 XOFF 1101011011 024 20 14 DC4 Device Control 4 1101101011 025 21 15 NAK Negative acknowled ... more details
known also as XON and XOFF respectively in this usage quickly became the de facto standard for software ... XOFF code T code 20 14 DC4 Device Control Four code U code 21 15 NAK Negative acknowledge character ... more details
Refimprove date October 2011 OS In computing, a device driver or software driver is a computer program allowing higher level computer programs to interact with a hardware device. A driver typically communicates with the Peripheral device through the computer bus or communications subsystem to which the hardware connects. When a calling program invokes a subroutine routine in the driver, the driver issues commands to the device. Once the device sends data back to the driver, the driver may invoke routines in the original calling program. Drivers are hardware dependent and operating system operating system specific. They usually provide the interrupt handling required for any necessary asynchronous time dependent hardware interface. Purpose A device driver simplifies programming by acting as translator between a hardware device and the applications or operating system s that use it. Programmers can write the higher level application code independently of whatever specific hardware device. Design Device drivers can be abstracted into logical and physical layer s. Logical layers process data for a class of devices such as Ethernet ports or disk drives. Physical layers communicate with specific device instances. For example, a serial port needs to handle standard communication protocols such as XON XON XOFF that are common for all serial port hardware. This would be managed by a serial port logical layer. However, the physical layer needs to communicate with a particular serial port chip. 16550 UART hardware differs from PL 011. The physical layer addresses these chip specific variations. Conventionally, OS requests go to the logical layer first. In turn, the logical layer calls upon the physical layer to implement OS requests in terms understandable by the hardware. Inversely, when a hardware device needs to respond to the OS, it uses the physical layer to speak to the logical layer. In Linux kernel Linux environments, programmers can build device drivers either as part ... more details
Q, DC1, also known as XON , 19 Control S, DC3, also known as XOFF , and 127 Delete key Delete ... but eventually became neglected. The use of Control S XOFF, an abbreviation for transmit off as a handshaking ... Control 3 oft. XOFF 001 0100 style background lightblue 024 style background CFF 20 style background ... more details
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