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| | interrupt |
 | | Interrupts were originated to avoid wasting the computer's valuable time in software loops waiting for electronic events. | | | In computer engineering, an interrupt is a signal from a device to the kernel, which typically results in a context switch. | | | A well-designed interrupt mechanism arranges the design of the computer bus, software and interrupting device so that if some single part of the interrupt sequence fails, the interrupt restarts and runs to completion. |
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http://www.fact-library.com/interrupt.html
(494 words)
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| | Systems Guide: Interrupts |
| | The vertical blank interrupt is an essential part of the ATARI Operating System and appears as a non-maskable interrupt (NMI) to the system. | | | The term interrupt applies to any signal, originating from hardware or software, which serves to suspend normal mainline program flow. | | | The NMI is one one of three possible interrupts that the ATARI can process. |
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http://www.atarimagazines.com/vbook/interrupts.html
(1135 words)
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| | Atari Graphics and Arcade Game Design-Chapter 6 |
| | When an interrupt occurs, the computer is sent to a vector in the operating system, which in turn sends it to a routine to determine what type of interrupt has occurred. | | | Once the interrupt has been handled, the program will RTI (return from interrupt instruction) back to the instruction that was to be executed before the interruption. | | | An interrupt is simply a way of telling the computer to stop what it is doing, handle something more important, then return to what it was previously doing. |
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http://www.atariarchives.org/agagd/chapter6.php
(4338 words)
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| | Homebrew Nintendo DS Development Part 8 - Interrupts |
| | An 'Interrupt' is a way of stopping the current execution of a CPU in the Nintendo DS to run an important function. | | | Interrupts are important because they ensure that certain things happen immediately rather than when the currently executing program 'gets around to it'. | | | An example is changing the value of the interrupt register themselves. |
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http://www.double.co.nz/nintendo_ds/nds_develop8.html
(2707 words)
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| | DAY 4 |
| | An interrupt is an event that when it occurs it causes the CPU to stop what it is doing and acknowledge the interrupt by executing some predetermined set of code. | | | In order to use this interrupt handler all we need do is point the IRQ vector at it and anytime an interrupt occurs control will be passed to a table of functions. | | | The number is the software interrupt in question (which we will get to momentarily). |
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http://www.thepernproject.com/tutorials/GBA/day_4.html
(4538 words)
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| | [No title] |
| | The vertical position of an object is determined by the location of it's bit map in memory. | | | Therefore, each time a key is pressed the data is treated as a byte of data just as data from any other device is. The only difference is that the computer must wait for the operator to press the keys as it reads the data. | | | The value of this byte is the number of vertical blanks (1/60th second each) to delay. |
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http://www.classicgaming.com/epr/atari/atariref.txt
(16109 words)
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| | [No title] |
| | The enable/disable register does not actually stop the interrupt from occuring; for example if the VDC asserts the IRQ1 line, and bit 1 of $1402 is set, then an interrupt isn't generated. | | | If there is a match and the raster compare interrupt enable bit in register $05 is set, then bit 2 of the status flags is set and an interrupt occurs. | | | An RCR value of $0040 (zero) causes an interrupt at line 25, and a value of $0146 (262) causes an interrupt at line 24 of the next frame. |
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http://cgfm2.emuviews.com/txt/pcetech.txt
(10462 words)
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| | [No title] |
| | If a RET is used as the final instruction in an interrupt routine, interrupts will remain disabled unless a EI was used in the interrupt routine or is used at a later time. | | | Resetting of the IF register, which was the cause of the interrupt, is done by hardware. | | | The interrupt will be acknowledged during opcode fetch period of each instruction. |
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http://www.devrs.com/gb/files/gbspec.txt
(4943 words)
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| | Compute!'s First Book of Atari Graphics |
| | Locations 53277 and 54279 are used to switch on the DMA graphics data transfer facility and to tell the ANTIC chip where in memory to find the player graphics data. | | | First, you must get the VBLANK PM machine language subroutine into memory and notify the operating system that it is to be included as one of the "housekeeping" tasks to be performed as a part of servicing the vertical blank interrupt. | | | As you know, the Atari keeps itself pretty busy doing its "housekeeping" chores even while it is interpreting your BASIC program. |
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http://www.atariarchives.org/c1bag/page164.php
(2062 words)
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| | Fast Repeat Key |
| | interrupt handler in a different ROM location (this wasn't really a problem, since I could check the "reserved" interrupt vector to find out where it was), but it was three, Yes, three times as long as the handler in the | | | I began by writing a program that copied the OS keyboard interrupt routine from ROM into RAM, changed the value stored into SRTIMR and, of course, altered the interrupt vector to point to the new routine. | | | It works liks this: Every time you press a key, the keyboard interrupt routine stores a value of 30 (for a 30-jiffy or 1/2 second delay) into SRTIMR. |
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http://www.cyberroach.com/analog/an16/fast_repeat.htm
(611 words)
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| | JOSHUA Virus |
| | self-identification method: testing value of adress the vertical blank interrupt vector is pointing to plus 480 byte, if matching hex. |
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http://agn-www.informatik.uni-hamburg.de/catalog/amiga/html/joshua1.htm
(91 words)
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| | Assembly Language: Fine Scrolling World: Part II |
| | After you've stolen a vector, there's a small chance that an interrupt will begin after the first byte of the pointer that you're using has been updated, but before the second byte has been changed. | | | This allows you to use a vector as an easy method for controlling the behavior of your computer's operating system. | | | After these steps are taken, your computer will process your new routine 60 times every second-just before it begins each VBI interrupt. |
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http://www.atarimagazines.com/v4n6/assemblylanguage.html
(1944 words)
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| | [No title] |
| | Vertical sync start in scanlines Note: This register is written at 1AE8h CAEEh W(W): Scan To X Register (Mach8/32 bit 0-10 SCAN_TO_X. | | | Disable blanking screen blank in CGA and Hercules emulation if set 1CEh index B7h (R/W): ATI Register 37 (ATI37) bit 0 Status of ISA bus 16bit Operation Select. | | | When reading indicates whether a Command FIFO data error interrupt occoured (if set ?), when writing acknowledges (and clears?) the interrupt (if set ?). |
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http://www.pdos.lcs.mit.edu/6.828/2004/readings/hardware/vgadoc/ATI.TXT
(11688 words)
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| | [No title] |
| | The main thing that will change for other asm based languanges is the interrupt hooking. | | | Give mov al, ah ; a little room for interrupt latency and computers out 40h, al ; that run nearer to 68 Hz refresh. | | | It's the simple speed of the computer (xxMhz). |
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http://www.bexxx.de/projects/myfirsthomepage/texte/demo.faq
(10293 words)
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| | [No title] |
| | The IRQ relates to which bit the interrupt - * comes in on. |
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http://www.kadlec.lkams.kernel.org/pub/linux/kernel/v2.1/patch-2.1.116
(6645 words)
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| | [No title] |
| | Errors, interrupts, limit violations, etc. are best handled as exceptions, with minimum impact on program structure. | | | The OS ROM chip is programmed with instructions when it is manufactured, and cannot be changed at a later time. | | | The name derives from the observation that writing a program innocent of exceptions is relatively easy, so the harder problem of handling exceptions is better deferred to last. |
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http://www.textfiles.com/magazines/ZNET/0203.txt
(8042 words)
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| | [No title] |
| | To do this for Atari DOS 2.0S, use PROBJ (available in XA5 as PROBJ.BIN) to ZAP the file DUP.SYS at address $2731 from $205CE4 to $EAEAEA, as you transfer it to an output file; finish by Copying the output file back to DUP.SYS. | | | USE: Both programs can either be Loaded from the DOS menu or made part (or all) of an AUTORUN.SYS file. | | | Here's a simple way to provide the same kind of response for other programs. |
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http://www.umich.edu/~archive/atari/8bit/Unverified/Cislib_a/fkey.doc
(424 words)
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| | Web Site Hosting : amiints : 2.0.39 |
| | /* isr node variables for amiga interrupt sources */ | | | * Enable/disable a particular machine specific interrupt source. | | | /* turn off all interrupts and enable the master interrupt bit */ |
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http://www.oxxus.net/host/2.0.39/hosting-amiints.htm
(446 words)
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| | screensplit (Development MSX Forum) |
| | interrupt states should never be changed in such a piece of code (atleast be "re"set) although there are lotsa channels to be set ofcourse (depends on tune??) MB uses STATIC channel numbers not? | | | In the end I decided it would just be easier to flip the whole thing around and have my main program running on the interrupt and the interrupt program as the main program ^_^ | | | Line interrupt is a variable interrupt (variable Y position) which is standard disabled. |
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http://www.msx.org/forumtopicl4628.html
(327 words)
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| | UNC Writing Center Handout Brainstorming |
| | Whether you are starting with too much information or not enough, brainstorming can help you to put a new writing task in motion or revive a project that hasn't reached completion. | | | You might do this on the computer or on paper, and you can even try it with your eyes shut or the monitor off, which encourages speed and freedom of thought. | | | You could also use a blackboard if you are working with a group of people. |
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http://www.unc.edu/depts/wcweb/handouts/brainstorming.html
(2959 words)
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| | Homebrew Nintendo DS Development Part 3 |
| | The interrupts tutorial demonstrates how to do this and outlines some disadvantages with the interrupt method. | | | And the drawing code will be changed to use this variable for the color: | | | We can have an interrupt function called immediately when a key is pressed. |
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http://www.double.co.nz/nintendo_ds/nds_develop3.html
(959 words)
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| | Vertical blank interrupt - Wikipedia, the free encyclopedia |
| | Simple routines like reading the joystick or updating the display can be placed in the VBI, and then basically ignored while the main program runs. | | | A vertical blank interrupt (or VBI) is a programming technique used in some systems, notably video games and consoles, to allow program code to be run in the periods when the display hardware is turned off, waiting for the TV to complete its vertical blank, which takes about 20 uS. | | | Since the vertical blank period occurs regularly every 25th or 30th of a second (depending on the standard), timing the code to run during this period guarantees a regular "heartbeat" which is useful for timing-dependent functions. |
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http://en.wikipedia.org/wiki/Vertical_blank_interrupt
(268 words)
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| | Sat-ND, 18.2.98 |
| | The system is called teletext, but the difference is that you don't need a computer to receive news, sports, programme schedules and such. | | | Participating television broadcasters will be able to send data to computer users tuned to their channel. | | | The system uses the vertical blank interrupt (VBI) part of the TV signal to deliver data, which by the way has been common practice in Europe for centuries. |
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http://www.sat-net.com/listserver/sat-nd/msg00424.html
(2307 words)
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| | [No title] |
| | Jon D. Melbo, mailto:ssilicon@lax.net sums it up this way: So a basic rule of themb when sharing 360KB floppies among 360KB & 1.2MB drives is: Never do any writes with a 1.2MB drive to a disk that has been previously written to in a 360KB drive....UNLESS... | | | Send a blank e-mail to: mailto:xlsearch@newbreedsoftware.com XL Search now contains an index of 7 sites, totalling over 17,000 Atari 8-bit programs and files! | | | The old OS A was not clever enough to notice the difference, so all system timings like the keyboard auto-repeat function depend on the TV system. |
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http://www.1000bit.net/support/faq/Atari_8-Bit_faq.txt
(15378 words)
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| | SIFE - Features [New Breed Software] |
| | Using a Super-IRG font is easy; all you need is one simple Vertical Blank Interrupt (VBI) which toggles current font (CHBAS) between two pages. | | | There's also a simple copy/paste buffer for duplicating or moving characters around in your font. | | | No Display List Interrupts (DLI's) are needed, and since the color palette doesn't change, the frames can be dithered, which means screens won't look as flickery as APAC or ColorView software-driven graphics modes! |
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http://www.newbreedsoftware.com/sife/features
(141 words)
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| | [No title] |
| | ** These values must match up with the DPX's interrupt table entries. | | | */ typedef enum { DPX_INTR_IVB, /* Input Vertical Blank interrupt */ DPX_INTR_DVB, /* Display Vertical Blank interrupt */ DPX_INTR_TMS, /* TMS32010 (GSP) interrupt */ DPX_INTR_AM, /* Acquisition module interrupt */ DPX_INTR_EXT, /* External Trigger Interrupt */ DPX_INTR_ACQ, /* Acquisition complete interrupt */ DPX_INTR_MAX_EVENT /* MUST be last !!! |
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http://w3.rz-berlin.mpg.de/~taifun/fhi/15040v25/common/include/dpx.h
(107 words)
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| | Re: Interrupts |
| | It's supposed to be the contents of the > data bus at the moment of the interrupt being acknowledged. | | | However, in the MSX system the mouse is read through the PSG and a lightpen is most of the time not connected (you'll have to solder on your VDP to do that... | | | IE0 is to enable/disable interrupts from a lightpen/mouse connected to the v9938/58. |
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http://www.mail-archive.com/msx@stack.nl/msg08589.html
(292 words)
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| | Emuxhaven: Emulators & Emulation News Site at its best |
| | This should make using the debugger easier for users with lower resolution monitors. | | | Fixed bug related to upgrading Stella and event mappings being incorrect. | | | Related to this, the RomWidget now uses all possible vertical space when changing the debugger height. |
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http://www.emuxhaven.net
(1997 words)
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| | [No title] |
| | Each 4K bank of sprite RAM contains 256 16-byte entries describing a single sprite. | | | It has two CPUs and a road generator like Enduro Racer, the System 16B tilemap chip, and a new sprite system that is programmed similar to the line sprites from both systems, but is actually framebuffer based like the later "Y-Board" and System 24 hardware. | | | Depending on the positions of jumpers S35 and S36, /WDC either needs to be pulsed or the watchdog clock is automatically pulsed by the V-Blank interrupt. |
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http://cgfm2.emuviews.com/txt/loftech.txt
(2517 words)
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| | GDI+: Next-Generation Graphics Device Interface: Draft March 10, 1999 |
| | Scan-line triggered screen-to-screen Blts are the preferred solution, and must happen asynchronously in the hardware--it is unacceptable to require either the CPU or the graphics accelerator to block until the event is initiated. | | | There must be a mechanism to allow the software to determine when a Blt has completed; a vertical blank counter would be sufficient. | | | It must also be possible to program the scan-line triggered Blts at high frequencies, such as at the vertical blank interrupt. |
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http://www.microsoft.com/whdc/archive/GDInext.mspx
(3928 words)
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| | Sat-ND, 19.2.98 |
| | The Intel Intercast system uses a plug-in PC board which is on sale in America and Germany. | | | Everything you always wanted to know about the Vertical Blank Interrupt... | | | Reaction from readers always comes when I least expect it, for instance on yesterday's article "Microsoft discovered the vertical blank." Here's what to two readers had to say. |
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http://www.sat-net.com/listserver/sat-nd/msg00426.html
(2248 words)
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| | [No title] |
| | The values supplied are already + * rounded down to the hardware's capabilities (according to the + * entries in the var structure). | | | + + Horizontal values are in dotclock cycles (35 ns), vertical values are in + scanlines. | | | + * Horizontal blanking occurs in range 0x0f -> 0x35. |
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http://www.hu.kernel.org/pub/linux/kernel/v1.3/patch-1.3.94
(5481 words)
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| |
| | 8-Bit Product Reviews: Rainbow Walker, The Seven Cities of Gold, Pitfall, Drol, Carrier Force, NATO Commander, ... |
| | Ozark Softscape, the designers, developed a technique to load new portions of the scrolling map without interrupting the play of the game. | | | Her BASIC code is well structured and commented. | | | Some of the more interesting subjects covered include a Vertical Blank Interrupt routine that plays music continuously, even after the BASIC program has stopped, and sample code on page flipping. |
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http://www.atarimagazines.com/v3n5/reviews.html
(3838 words)
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| | Concise Atari ST 68000 Programmer's Reference Guide: Interrupt Handler |
| | Concise Atari ST 68000 Programmer's Reference Guide: Interrupt Handler | | | The standard system interrupt is level 2, vector $68 (104) and takes the following sequence every interrupt: | | | Do not make VDI or LINE A calls via an Interupt as the results are unpredictable if the ST has a blitter chip installed. |
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http://homepage.ntlworld.com/kryten_droid/Atari/ST/spg/st_prog_guide_3_interrupt_handler.htm
(158 words)
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| | Viruses for the 'Exotic' Platforms (VX heavens) |
| | a resident program using the CoolCaptureVector is shut down; uses DoIOVector; counts vertical blanks until it's time to bring up his new pointer; virus detects BYTE BANDIT, SCA and SCA clones. | | | permanent damage: reset operation: any disk access transient damage: if condition holds: 2 resets AND 6 infections AND execution of BYTE BANDIT's own interrupt routine 5208 times (about 7 minutes) |
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http://vx.netlux.org/exotic.php
(2457 words)
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| | Writing On Your Palm: 08/01/2002 - 08/31/2002 |
| | This saves the task in my list of templates, allowing me to quickly select it instead of a blank task the next time I create a task in Agenda Fusion. | | | What I find interesting about this arrangement is that without the writers, the publishers have no business, unless they all get into making those kitchy "blank" books that some people use for journals. | | | So really, do the authors need the publishers more than the publishers need the authors? |
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http://www.writingonyourpalm.net/2002_08_01_log_archive.php
(10182 words)
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| | Concise Atari 68000 Programmer's Reference Guide: Glossary |
| | ID Identification ikbd Intelligent keyboard IPL Interrupt level I/O Input/output | | | GDOS Graphics device operating system GEM Graphics environment manager GIOS Graphics input/output system GP General purpose Gnd Ground GSX Graphic system extension | | | LPB Load parameter block LSB Least significant byte/bit LST List |
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http://homepage.ntlworld.com/kryten_droid/Atari/ST/spg/st_prog_guide_m.htm
(309 words)
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| | roleplaying tips for roleplayers and gamemaster roleplaying advice for all roleplaying systems and rpgs |
| | For example, place a note with each PC's armour class to the left of your armour table. | | | As for storytelling, when I'm GMing I find that I often get into a zone where the words and ideas flow, I have a flexible vision of the current plot thread, and I've managed to capture the player's imaginations and hold their attention. | | | The first step is to pick out a power, a weapon, or ability that you think would be the most effect way to accomplish your goals. |
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http://www.roleplayingtips.com/issue240.asp
(4697 words)
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| | [No title] |
| | V1.0 Author: Damian Cox Version: 1.0 Source: Fish collection This program animates any wait pointer like the one in WorkBench 2.0. | | | It installs a vertical blank interrupt to minimise CPU usage and is written 100% in assembler for maximum efficiency. | | | It uses two hands for the clock, like it should be, and has nine different user selectable speeds. |
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http://wuarchive.wustl.edu/aminet/util/wb/AWP.readme
(58 words)
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| |
| | ...::: TCB TRACKER :::... |
| | You create a small program that has two components. | | | Read the counter every VBL, now insert the player routine and read the counter. | | | 1 Vertical blank interrupt that displays and then resets a loop counter |
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http://home.earthlink.net/~chhome/tcbtracker.html
(320 words)
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| | blank |
| | Rather than having one of the letters of the alphabet printed on it, it has a blank face and can be substituted for any letter you desire (comparable with the wild card or joker in card games, or with a wildcard character in telecommunication and computing). | | | A blank is also an important tile in the game of Scrabble. | | | A blank expression is either one of slight confusion when someone refers to something which you do not understand or a poker-face (shortened to a po-face) where you which to hide your expression from other people. |
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http://www.fact-library.com/blank.html
(396 words)
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| |
| | EMUAPC DEMO description |
| | - Full POKEY emulation (random register, cycle-exact interrupts) | | | Emulator EMUAPC DEMO emulates banks switching, full sounds with noise and cycle-exact POKEY interrupts in real time. | | | EMUAPC DEMO cycle-exact POKEY interrupts gives great digi-sounds |
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http://www.komires.com/gb/projects/page4-01.html
(288 words)
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| | SMS Power! - Forums - View topic - RE: SMS/GG Sound |
| | The NMI is located in the interrupt vector table and you trace the code and usually at the end of the NMI code is the entry to the play code. | | | I know the NMI is when you pause a SMS/GG game. | | | On the SMS the only two interrupt vectors are at $66 for the NMI and $38 which is maskable (i.e. |
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http://www.smspower.org/forums/viewtopic.php?p=12192
(1385 words)
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| |
| | Vertical Launching System |
| | The current generation of VLS system is known as "Mk 41 Vertical Launch System". | | | USS San Jacinto.]] Vertical Launching System (VLS) is a missile-firing system aboard United States Navy attack submarines, and surface vessels belonging to the U.S. and other navies. | | | The VLS System replaced the Armored Box Launcher system that was previously used by United States Navy ships to fire missiles. |
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http://www.kiwipedia.com/en/vertical-launching-system-1.html
(308 words)
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| |
| | olde vsyncing (was Re: [dirGames-L] Vertical blank...) |
| | The next vertical blanking signal detected (which in the case of the Apple II+ was a hack where you wired a leg of one of the chips to one of the analog controller inputs) would reset your timing. | | | Once it's at the top you then carefully time (in machine code) how long before you switch to the next mode. | | | > >IE vertical is waiting for electron gun to switch off and shoot back to the >top, horizontal syncing commands were to interrupt the beam at a particular >scanline? |
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http://nuttybar.drama.uga.edu/pipermail/dirgames-l/2003-February/021764.html
(154 words)
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| |
| | [No title] |
| | PROC ChangeColor() BYTE hue, lum SaveTemps hue = Rand(16) lum = Rand(16) SetColor(2,hue,lum) GetTemps [ $6C OldVBI ] ; Vertical blank ; interrupts must end ; like this ($6C is a ; 6502 indirect jump ; instruction). | | | These routines are adequate only if no math beyond addition and subtraction is performed in the interrupt service routine. | | | ; The main routine will set up this ; code to operate during the ; deferred vertical blank interrupt. |
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http://www.umich.edu/~archive/atari/8bit/Unverified/Cislib_a/bugs1.act
(275 words)
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| | [No title] |
| | So all you have to do is assemble your program so that it starts at $808000, make sure you set the programming and data banks to $80 (K and D) and set bit 0 of $420D. | | | I also see that the source code for an early version of my GIF2SNES program has made it onto the ftp site by a somewhat indirect route (UK->NZ->AUS->USA). | | | You'll also need to mask off the bank part of the run/reset vector and vertical blank interrupt locations. |
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http://www.classicgaming.com/epr/super/fastrom.txt
(277 words)
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| |
| | DSEmu 0.4.4 Released! - The Emulator Zone Forum |
| | Previously SWI 4 and 5 only really worked for the vertical blank interrupt, now it works for all interrupts. | | | Changed SWI 4 and SWI 5 implementation to use coprocessor 15's instruction to switch into low power mode, and implemented in ARM assembly in the fake ARM9 BIOS instead of C. This works much more like the actual DS hardware now. | | | Fixed some timing issues with interrupts and low power mode. |
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http://forums.emulator-zone.com/showthread.php?t=3632
(214 words)
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