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<1…13141516171819…34>
  • Interrupts details questionSuppose I am writing a game and I want to use interrupts to measure time, draw the screen without flicker, maybe to poll keyboard etc. What kinds of …

    ... snapshot file I set the interrupt flipflop byte to 0, because ... 0 ;IX
    .byte $ff ;Interrupt (bit 2 contains IFF2, 1 ... /> jr repeat


    ; interrupt routine
    ; it does the ...
    Erlstoned Erlstoned August 2004 Development
  • IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…

    ... Start

    ; **** START INTERRUPT ROUTINE ***

    MainLoop:

    ; **** END INTERRUPT ROUTINE ***

    Start:

    ;prepares interrupt handling
    initIM2:

    robpearmain robpearmain August 2004 Development
  • IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…

    ... />

    ; **** START INTERRUPT ROUTINE ***

    MainLoop:

    ; **** END INTERRUPT ROUTINE ***

    MoveAndPrintSprite:

    ;prepares interrupt handling
    initIM2:

    robpearmain robpearmain August 2004 Development
  • Interrupts details questionSuppose I am writing a game and I want to use interrupts to measure time, draw the screen without flicker, maybe to poll keyboard etc. What kinds of …

    ... video display and generates an interrupt just before it starts drawing ...
    Alcoholics Anonymous Alcoholics Anonymous August 2004 Development
  • What does SPIN have?I have been asking this question since somebody answered another I had made that RealSpectrum was a brilliant emulator. It is in fact. But... I see e…

    ... 's all. Perhaps LIST and MERGE too, but I am not ...
    secarica secarica September 2004 Emulators
  • PokesDoes anyone know where I can find a list of Pokes for my Speccy games? I am trying to find some for On the Bench ! Thanks

    ... to do any [B][I]MERGE[/I][/B]ing or deleting ... can completely remove the [B]MERGE "M1"[/B] from [I]line ...
    jil jil September 2004 Games
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... some method of timing the interrupt frequency - and handily enough, each ... reach 69888 then cause your interrupt and update your display.
    Dunny Dunny September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... some method of timing the interrupt frequency - and handily enough, each ... reach 69888 then cause your interrupt and update your display. [/quote ...
    MadDoc MadDoc September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    If its DI (disable interrupt) then I think I may have turned a corner :)

    I'm working on the opcodes at the mo. Me thinks it will take some time :)

    @ Woody:
    Thanks a lot. Really appreciate it.

    MadDoc,
    MadDoc MadDoc September 2004 Development
  • I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…

    ... :
    If its DI (disable interrupt) then I think I may ...
    Dunny Dunny September 2004 Development
  • Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …

    ... for a period after the interrupt so that the TV raster ...
    Alcoholics Anonymous Alcoholics Anonymous September 2004 Development
  • On 48k, can I copy 4k before next screen updateFollowing on from my thread at [url="http://www.worldofspectrum.org/forums/viewtopic.php?topic=6423&forum=11"]http://www.worldofspectrum.org/forums/v…

    ... be either immediately after the interrupt or immediately after the first ...
    gasman gasman September 2004 Development
  • On 48k, can I copy 4k before next screen updateFollowing on from my thread at [url="http://www.worldofspectrum.org/forums/viewtopic.php?topic=6423&forum=11"]http://www.worldofspectrum.org/forums/v…

    ... T states since the last interrupt -- set a breakpoint at the ... your copy routine after the interrupt. There are about 14000 T ...
    Alcoholics Anonymous Alcoholics Anonymous September 2004 Development
  • On 48k, can I copy 4k before next screen updateFollowing on from my thread at [url="http://www.worldofspectrum.org/forums/viewtopic.php?topic=6423&forum=11"]http://www.worldofspectrum.org/forums/v…

    ... to wait about 14300T after interrupt but there is way how ...
    Fikee Fikee September 2004 Development
  • Smooth Screen ScrollingHi Everyone, Any suggestions on what is the best way to do horizontal scrolling ie. in Zynaps fashion. I am working on a routine at the moment, whi…

    ... of counter.
    or c ; merge with low byte.
    jp ...
    jonathan jonathan September 2004 Development
  • Wanted: Code to wait until Border has been drawnWhen my IM2 interrupt fires, I want to wait until the ULA is past the first line of display before drawing. I know I need to wait about 14300T after…

    ... according to machine) tstates after interrupt?

    If you're ... to the end before an interrupt occurs.

    Alternatively, read ...
    Philip Kendall Philip Kendall September 2004 Development
  • Wanted: Code to wait until Border has been drawnWhen my IM2 interrupt fires, I want to wait until the ULA is past the first line of display before drawing. I know I need to wait about 14300T after…

    ... first synchronises perfectly with the interrupt, then waits 14112 ( = 14336 - 224 ... tstates which have elapsed since interrupt.

    [ This Message was ...
    Philip Kendall Philip Kendall September 2004 Development
  • TZX and the ZX81Evenin All. EightyOne is now is a state where I can support a more descriptive tape format. I know how some people have been calling for tzx suppor…

    ... they take the two and merge them in Taper or equivalent ...
    Philip Kendall Philip Kendall September 2004 Emulators
  • Cobra - scrollingHi everyone, I have been studying some of the code in Ocean' Cobra game using a debugger, in the hope of improving my own scrolling routines. In cas…

    It's waiting for bit 7 of R to be set. Bit 7 can only be changed in software using LD R,A. Look in the interrupt service routine.
    The delay must be measured in multiples of 20ms.
    Woody Woody October 2004 Development
  • Cobra - scrollingHi everyone, I have been studying some of the code in Ocean' Cobra game using a debugger, in the hope of improving my own scrolling routines. In cas…

    ... the game runs within the interrupt.

    [ This Message was ...
    AndyC AndyC October 2004 Development
  • LOAD ... syntax on TR-DOS ?What's the LOAD (SAVE, MERGE) syntax on TR-DOS ? Cristi

    ... .

    EDIT: I assume MERGE works in exactly the same ...
    b00mzi11a b00mzi11a October 2004 Sinclair Miscellaneous
  • How do I poke a Spectrum?I've forgotten how to do it. Does anyone remember?

    ... you may be able to MERGE the initial BASIC loader and ...
    Lee Tonks Lee Tonks October 2004 Games
  • How do I poke a Spectrum?I've forgotten how to do it. Does anyone remember?

    ... you may be able to MERGE the initial BASIC loader and ...
    Sabre Man Sabre Man October 2004 Games
  • How do I poke a Spectrum?I've forgotten how to do it. Does anyone remember?

    ... load the game you type merge"" then press enter.
    start ...
    mel the bell mel the bell October 2004 Games
  • Sprites flickeringI am trying to write a Spectrum game in machine code. I am still a beginner in programming, however I did much progress recently, i believe. Now I am…

    ... will wait until the next interrupt. As the screen drawing starts ... with this interrupt that is one way of ...
    cyborg cyborg October 2004 Development
  • Sprites flickeringI am trying to write a Spectrum game in machine code. I am still a beginner in programming, however I did much progress recently, i believe. Now I am…

    ... begin my routine with new interrupt
    2. Then i wait ...
    Ralf Ralf October 2004 Development
  • Alan SugarFor all those people that want a new speccy, console, handheld, etc., NOW IS YOUR CHANCE!!!! The UK version of 'the apprentice' starts next year, an…

    ... reckon best bet is to merge it with Drug Lord 2 ...
    CKay CKay October 2004 Sinclair Miscellaneous
  • Avalon and DragontorcAlways wandered why these games are so highly rated. I never liked them - never had the time and patience to get involved. This morning I was going t…

    ... , there's the issue of interrupt retriggering - which means that there ... some instances can be an interrupt generated very shortly after the ... may be related to the interrupt-retriggering.

    Unfortunately, for ...
    Dunny Dunny November 2004 Games
  • Avalon and DragontorcAlways wandered why these games are so highly rated. I never liked them - never had the time and patience to get involved. This morning I was going t…

    ... , there's the issue of interrupt retriggering - which means that there ... some instances can be an interrupt generated very shortly after the ...
    kmatveev kmatveev November 2004 Games
  • Avalon and DragontorcAlways wandered why these games are so highly rated. I never liked them - never had the time and patience to get involved. This morning I was going t…

    ... , there's the issue of interrupt retriggering - which means that there ... some instances can be an interrupt generated very shortly after the ... 3 part 6 (which has interrupt retriggering on every frame) to ...
    Jon Needle Jon Needle November 2004 Games
<1…13141516171819…34>

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