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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
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| | ...:::ECCT:::... |
| | INTERRUPT: this is the signal which is used to momentarily pause the functioning of the computer's microprocessor. | | | There is an established interrupt hierarchy so that the computer knows which one to accept first and which ones should interrupt other ones already in process. | | | Once the processor has dealt with the interrupt, it continues with the initial action it was performing. |
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http://www.ecct.net/index.cfm?fuseaction=Glossary
(7137 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
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| | Home computer and game apparatus - Patent 4301503 |
| | For example, if the horizontal color boundary is set at 0 by the computer, the line will be just to the left of the byte 0 if it is set to 20, the line will be between bytes 19 and 20 which corresponds to the center of the screen. | | | This data was placed on the microcycler data bus by the peripheral device initiating the interrupt and will be used by the CPU in its response to the interrupt signal. | | | In the high resolution mode, if a value X is sent to the horizontal color boundary register, the boundary line will be between bytes having addresses 2X and 2X-1 which corresponds to the same position on the screen as the low resolution mode but between different bytes. |
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http://www.freepatentsonline.com/4301503.html
(19058 words)
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| | [No title] |
| | 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. | | | INTERRUPT REQUESTS (maskable interrupts (IRQs)) When an IRQ interrupt occurs the hardware register IRQST [$D20E], the PIA status registers, PACTL [$D302] and PBCTL [$D303] are examined to determine what caused the interrupt. | | | DISPLAY LIST INTERRUPTS (DLIs) The computer makes no use of DLIs. |
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http://www.classicgaming.com/epr/atari/atariref.txt
(16109 words)
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| | De Re Atari - Chapter 5 |
| | The interrupt to do this must be precisely timed to occur at exactly the same time during the screen drawing process. | | | The display list interrupt (DLI) is one of the most powerful capabilities built into the ATARI Home Computer. | | | The ATARI Home Computer display is not a flat, blank sheet of paper on which you draw; it is a stack of thin strips, each of which can take different parameters. |
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http://www.atariarchives.org/dere/chapt05.php
(3679 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 reason for this is that usage requires the calling of a software interrupt and there is no C statement that will produce the required opcode. |
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http://www.thepernproject.com/tutorials/GBA/day_4.html
(4538 words)
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| | [No title] |
| | Resetting of the IF register, which was the cause of the interrupt, is done by hardware. | | | 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. | | | 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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| | Mappy VM SDK 0.1 |
| | Similarly, the vertical retrace is known as the vertical blank, and lasts for a considerable time (in computer terms anyways, it is still a minute fraction of a second). | | | The hardware interrupt vector of the ARM resides in BIOS, and the handler redirects the call to the address stored at 0x03007FFC. | | | The CPU is not really fast enough to do all of the math durring rendering, so a common technique is to precalculate the values in a table which is copied to the I/O registers durring each horizontal retrace either via the CPU or a repeating DMA channel. |
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http://www.bottledlight.com/docs/sdk.html
(2561 words)
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| | GB DEV FAQs |
| | At the end of the interrupt, a RETI assembly instruction is usually executed which returns to executing code that was running before the interrupt occurred and enables interrupts again. | | | Since there would be no interrupt involved in monitoring this input pin you would need to devote a good bit of CPU time to monitoring this pin and probably no interrupts would be feasible while looking for serial data. | | | If the other interrupt code (that is causing this problem) is extremely long then you may need to set the LYC interrupt to occur several lines or more before it is actually needed. |
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http://www.devrs.com/gb/files/faqs.html
(16857 words)
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| | Yet Another Gamecube Documentation\ {\small (but one that's worth printing)} - GameCube-Linux |
| | They are used to generate interrupts to the main processor at different positions within a field. | | | It is only causing masked interrupt to be ignored in the software interrupt handler. | | | The Mass Storage Device Cover Interrupt is asserted when the status of the DICOVER signal changes (e.g., when the cover is opened or closed). |
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http://www.gc-linux.org/docs/yagcd/chap5.html
(2785 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
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| | Pages Two through Four |
| | This goes on until the checksum byte has been sent, at which time a "transmit done" interrupt is generated and SIO hands control back to the main program, which has been waiting patiently all this time. | | | It means that this vector is used when the 110 bus indicates that it has received a byte that is now waiting in the serial input register, ready to be moved to a buffer. | | | The first 42 bytes are used for interrupt vectors, so we'd better take a quick look at interrupts. |
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http://www.atariarchives.org/mmm/pages_two_through_four.php
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| | [No title] |
| | Instructions that cause Control Panel Interrupts are : 6030, 6032, 6034, 6036 6040, 6042, 6044, 6046 Interrupts from any of these user issued instructions are identified by the single instruction 6071. | | | Erase functions are synchronised with the display timing by the Control Panel code waiting for an End of Frame interrupt before initiating an erase function and then waiting for the next End of Erame interrupt to indicate that the erase has been completed. | | | The Skip and Interrupt Enable instructions, (6031, 6035, 6041, 6045) do not cause Control Panel Memory interrupts. |
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http://www.dbit.com/pub/pdp8/doc/dm2spec.doc
(9406 words)
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| | ST Demos 1 |
| | That's what an interrupt is. Interrupts are also used to process keyboard/Midi data, disk access, or internal clocks. | | | In demos such other interrupts were switched off because they stole time from raster effects or complex calculations. | | | Leaving a keyboard interrupt enabled with rasters, then moving the mouse, caused the rasters to wobble up and down - a source of much hilarity. |
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http://www.clarets.org/steve/demos/files/stdemos1.html
(1340 words)
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| | Transporting Atari 8bit games to Atari 5200 |
| | If no interrupt found, then push X and check for a BRK instruction interrupt. | | | If the critical code flag byte is non-zero, then pop Y, X, and A from the stack and return from the interrupt. | | | Since ANTIC shares the address bus with the CPU and has no chip select input, its registers reside in the same place in the 5200's memory as in the 400/800's, page $D4. |
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http://www.atarimuseum.com/videogames/consoles/5200/conv_to_5200.html
(1905 words)
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| | [No title] |
| | Writing $00 indicates a byte is to be DMA'd each scan line, writing $02 indicates a word. | | | After completion of the last instruction "sta $420B" the $800 bytes at $18000 will have been copied into VRAM at location $0000. | | | HDMA allows you to use any combination of these DMA channels to modify graphics registers just before the start of every horizontal scan line. |
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http://oregonstate.edu/~robinsfr/docs/emu/SNES/DMA.TXT
(797 words)
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| | [No title] |
| | 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. | | | Offset Size Description 00h WORD Horizontal Display Resolution in pixels 02h WORD Vertical Display Resolution in scanlines 04h BYTE Maximum pixel depth. | | | 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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| | FujiBoink! Behind the Bit Planes |
| | Each brightness value is mapped onto an ST color, starting from dark blue at the low end, through light blue to white at the high end. | | | The technique consists of programming the 68901 Multi-Function Peripheral chip to generate an interrupt every scan line. | | | The first problem was solved in Tom Hudson's ST Color Palette article (ANALOG magazine, January, 1986). |
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http://www.atarimagazines.com/startv1n2/Fujiboink.html
(1686 words)
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| | II. Uniformity Of Change. Lyell, Charles. 1909-14. Scientific Papers. The Harvard Classics |
| | I shall now conclude the discussion of a question with which we have been occupied since the beginning of the fifth chapter—namely, whether there has been any interruption, from the remotest periods, of one uniform and continuous system of change in the animate and inanimate world. | | | It would be easy to multiply instances of similar unconformability in formations of other ages; but a few more will suffice. | | | These older rocks are still as flat and horizontal as when first formed; yet, since their origin, not only have most of the actual mountain-chains been uplifted, but some of the very rocks of which those mountains are composed have been formed, some of them by igneous and others by aqueous action. |
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http://www.bartleby.com/38/8/2.html
(5462 words)
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| | Vertical blank interrupt |
| | 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. | | | Set home page · Bookmark site · Add search | | | 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. |
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http://www.sciencedaily.com/encyclopedia/vertical_blank_interrupt
(308 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
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| | Interrupt List |
| | Tandy systems which use IRQ2 for the hard disk interrupt use IRQ5 for vertical retrace. | | | It is only with YOUR help that the list can continue to grow at the current rate. | | | On the PC AT and compatibles, external circuitry generates a reset on shutdown. |
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http://irb.cs.uni-magdeburg.de/~zbrog/asm/interrupt.html
(4519 words)
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| | [No title] |
| | If clear an interrupt is generated when the current instruction completes 7 Direction. | | | M+000Ch D(R/W): Interrupt Enable bit 0 If set allows interrupt when the drawing engine goes idle 1 Must be set on writes for bit 0 to be updated. | | | If an interrupt status bit (Bits 0,2,4) is set an interrupt will be generated if allowed by the Interrupt Enable register (M+0000Ch). |
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http://www.pdos.lcs.mit.edu/6.828/2004/readings/hardware/vgadoc/WEITEK.TXT
(2450 words)
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| | nV News Forums - Blank / garbled screen round up |
| | The interrupt assignment to USB/Firewire/Network is pure shambles and the reason X11 locks up with the nvidia driver ist a total loss of the interrupts (none are transmitted from the card)... | | | Only difference seems to be, that my system is completely freezed, i only can do a reset. | | | I´m now configuring/compiling/googeling/forum browsing/ppl asking about two weeks, and slowly it really pisses me off :/ Especially when i see, that for the most 8RDA+ dudes the problem seems to be solved with the new bios version... |
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http://www.nvnews.net/vbulletin/printthread.php?t=13898&pp=40
(2885 words)
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| | Brougher Restorations- The Welte Recording System |
| | For Welte, their version was an amplitude mark in parallel format and strictly analog. | | | This machine had within it the conventional rolls of paper which were entirely blank and without perforations, but were ruled their entire length with over 100 fine lines, each corresponding to the center line of its control mechanism. | | | This did not hurt its accuracy, since the editor's square lay at the same angle and the drum spun at a very high rate of speed. |
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http://www.player-care.com/welte-recording.html
(7649 words)
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| | PCWorld.com - The Ultimate Insider's Guide to Windows |
| | To do so, right-click My Computer, click Properties, Device Manager, and check the properties of devices with problems (such as an interrupt conflict). | | | But icons in the Programs submenu are standard Windows shortcuts that you can modify as you need. | | | When you reboot, Windows will disable the driver that failed, and the Skip Driver Agent will identify it, but you'll still have to identify the problem. |
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http://www.pcworld.com/howto/article/0,aid,10210,00.asp
(7261 words)
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| | [ Retrogames ] - Your ONE STOP emulation site! |
| | Changes: This release adds basic input, a configuration file, basic interrupts, basic FPU emulation, and dynarec CPU core. | | | -Besides the vertical version there is now also a horizontal version of the frontend available. | | | Between the recent addition of raster effects and support for all the currently XOR'ed CPS2 games, this is an amazing version IMO of Dave's open source Final Burn emulator, despite the removed Afterburner hardware driver. |
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http://www.retrogames.com/112001.html
(9075 words)
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| | VIDEO |
| | This is used to generate a VBL for example. | | | Since the video system is thinking in halflines, we mentally (and mathematically) transpose the second halfline to the first, and set the bit #10. | | | The default values may not be all to your liking though (ain't to mine), so you might think about it differently. |
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http://justclaws.atari.org/devcats/dox/video.htm
(3350 words)
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| | Re: MSX2 horizontal scrolling... |
| | However, it will give trouble if there are other interrupts generated, like interrupts of the MoonSound... | | | I always test the statusregister, but this is also possible!!! | | | You can simulate the V_BLANK interrupt by > setting r#19 to 212 after the line interrupt at line 160. |
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http://www.mail-archive.com/msx@stack.nl/msg06193.html
(426 words)
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| | GameSite-SNES Programming Tutorial |
| | This sets the start address of the program. | | | This sets up the SNES interrupts, programming banks, and puts the 65816 into 16 bit mode. | | | sei ; disables interrupts phk ; push current bank on stack plb ; pop it off the stack and make ; it the current programming bank clc xce ; native 16-bit mode |
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http://oregonstate.edu/~robinsfr/docs/emu/SNES/SPROGRAM.HTM
(280 words)
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| | [No title] |
| | Questions at first were met with the stereotyped reply, "I don't know." He then helped himself to pencil and paper and wrote and drew pages and pages full of letters of the alphabet and a few simple designs. | | | He arranged the letters in two or three lines, reading them in vertical rather than horizontal succession, and was very much pleased with the result. | | | Sometimes an energetic "Don't!" caused him to interrupt his activity of the moment. |
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http://www.ama.org.br/download/Kannereng-complete.txt
(16059 words)
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| | AGH: Colecovision vs. Atari 5200: Hardware Comparison (Page 3) |
| | In fact, it's tough to picture any game that was gone on the CV that could not have been done equally well (by a good programmer) on the 5200. | | | Changing the colors during this interval does not affect the scan lines drawn previously, thus it is possible to change the palette on each and every scan line of the display. | | | Sure there would be some graphical adjustments (the 5200's multicolor graphics characters being half the horizontal rez of the CV's, for instance), but it could be done. |
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http://www.atarihq.com/5200/cv52/index3.html
(1227 words)
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| | This Is The Way |
| | A horizontal blank interrupt is a programming tech... | | | Presented annually by Delta Air Lines and the Univ... |
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http://inkstar.blogspot.com/2005/02/it-is-common-for-subsequent-episodes.html
(271 words)
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| | [No title] |
| | This has not been done by anyone before to my knowledge, but blank lines in a formula are ignored by the parser and are a perfectly acceptable technique to make formulas more readable. | | | This has not been done by anyone before - to my knowledge, but blank lines in a formula are ignored by the parser - and are a perfectly acceptable technique to make formulas more readable. | | | Subject: Re: Part 2 of (fractdev) Coloring algorithms Date: 10 Sep 1997 13:04:39 -0400 George, - I like your technique of using empty lines to block the - formulas into logical sections. |
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http://www.xmission.com/pub/lists/fractdev/archive/fractdev.9709
(17782 words)
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| | ::: larwe.com - atari st home ::: |
| | Unique DMA-driven display-synchronized coprocessor capable of writing new values into (most) custom chip registers. | | | All three channels are fed to a monaural amplifier. | | | This was used for effects such as faded color bars, switching resolutions, palettes or video memory pointers halfway through the screen, etc. On the ST, these effects had to be achieved by the main CPU executing a horizontal blank interrupt service routine. |
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http://www.larwe.com/museum/atarist.html
(1111 words)
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| | interlace |
| | now, just need to map this horizontal blank interrupt with the ultimate transcendental NOP, 'No-OPeration', yep, best instruction in the set baby.." |
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http://users.lycaeum.org/~yara/int/int212.htm
(238 words)
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| | The Sega Programming Network |
| | If I'm about to do a demo, I want to do palette and background effects during the Horizontal Blank interrupt | | | I was able to DMA twice as many colors by polling the HBlank bit in the status register than by using H-Ints. |
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http://www.emulationzone.org/projects/metalix/board/read.php?f=1&i=444&t=439
(585 words)
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| | Web hosting : vesa_blank : 2.0.39 |
| | * Result: turn off horizontal sync (HSync) pulse. | | | You may set this blanking interval in minutes by | | | the vertical synchronization pulse (mode 1) or horizontal |
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http://www.oxxus.net/host/2.0.39/hosting-vesa_blank.htm
(546 words)
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| | [No title] |
| | VBI ; LOAD X WITH MSB OF INTERRUPT ADDRESS1460 LDA #6 ; LOAD ACCUMULATOR WITH SIX FOR IMMEDIATE VBI1470 JSR SETVBV ; CALL OS ROUTINE TO SET VECTOR1480 RTS ; RETURN FROM SUBROUTINE | | | INT1 ; DISPLAY LIST INTERRUPT1380 STA VDSLST+1 ; VECTOR1390 JMP SYSVBV ; JUMP TO OS VERTICAL BLANK ROUTINE1400 ;1410 ; SET VECTOR TO VERTICAL BLANK INTERRUPT1420 ;1430 PLA ; DISCARD NUMBER OF PARAMETERS PASSED IN BASIC CALL1440 LDY # |
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http://www.atarimagazines.com/software/85-06/PALETTE.ASM
(72 words)
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| | Fluent French |
| | On France 2 and France 3 commercials don't usually interrupt a show-they are instead shown in several-minute blocks between shows. | | | On TF1, commercials are shown within a show and between shows as in the U.S. According to French government regulations, commercials must be clearly separated from programming. | | | The French Open will continue after the titles. |
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http://www.signiform.com/french/ff.htm
(16103 words)
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| | The Rhythm of Life and other Essays by Alice Meynell |
| | They knew that the flux is equal to the reflux; that to interrupt | | | formed perpendicular and not horizontal scenery), are those that | | | If winter comes, can spring be far behind?' |
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http://emotional-literacy-education.com/classic-books-online-b/rhyml10.htm
(13852 words)
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