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<1…19202122232425…34>
  • Games not compatible with real grey +2There are many threads about Spectrum+3/2A incompatibility issues but what about grey +2? I've found that games like Marauder and Skate Crazy don't w…

    ... attempt at executing code in contended memory (the region 16384-32767 ... the 128K/+2, there are contended memory pages that can be ... be dangerous.

    The contended pages are 1, 3, 5 ... crash when executing code in contended memory). Thus, you get games ...
    Alcoholics Anonymous Alcoholics Anonymous January 2010 Games
  • Games not compatible with real grey +2There are many threads about Spectrum+3/2A incompatibility issues but what about grey +2? I've found that games like Marauder and Skate Crazy don't w…

    ... . Why does code executed in contended memory cause a crash??[/QUOTE ... flakey values when reading from contended memory which causes rubbish to ...
    Jmk Jmk January 2010 Games
  • Games not compatible with real grey +2There are many threads about Spectrum+3/2A incompatibility issues but what about grey +2? I've found that games like Marauder and Skate Crazy don't w…

    ... flakey values when reading from contended memory which causes rubbish to ... 16k spectrum has nothing but contended ram and its prorgrams run ... I also set to a contended area, you will get ... believe that code executed in contended RAM could increase the likelihood ...
    Alcoholics Anonymous Alcoholics Anonymous January 2010 Games
  • Games not compatible with real grey +2There are many threads about Spectrum+3/2A incompatibility issues but what about grey +2? I've found that games like Marauder and Skate Crazy don't w…

    ... 16k spectrum has nothing but contended ram and its prorgrams run ...
    Jmk Jmk January 2010 Games
  • Games not compatible with real grey +2There are many threads about Spectrum+3/2A incompatibility issues but what about grey +2? I've found that games like Marauder and Skate Crazy don't w…

    ... believe that code executed in contended RAM could increase the likelihood ...
    Arjun Arjun January 2010 Games
  • Converting games from tap to dskHi to all from Greece, Being an old Speccy user and now owner of most models of Spectrum (48k , 48k+ , 128K, +2 grey and +3) , I desided to salvage m…

    ... /> Looks like data is in contended banks on +2a/+3. Could ...
    FrankT FrankT January 2010 Emulators
  • Game Boy Advance EmulationI've finally got myself a GBA flash cartridge and programmer. I've put ZXAdvance on it and I like the setup. Mildly disappointed that it doesn't ha…

    ... attempt to deal with the contended memory, so in that sense ...
    thehive thehive January 2010 Emulators
  • Double Dragon 128k - The graphicsAs you are all probably aware, I tried gathering a team of people together a few years back to make a totally re-programmed version of Double Dragon …

    ... the game itself (use the contended memory for front-end or ...
    bobs bobs January 2010 Development
  • Character scrollingOk, first I'd like to say that I'm not looking for a complete routine (but that might help) because I am hoping to write it myself and learn a bit mo…

    ... in the non-contended back buffer, only hitting contended memory when you ...
    csmith csmith February 2010 Development
  • Please test my Manic Miner remake!Thanks to everyone who downloaded my sneak preview of Manic Miner Turbo. Thanks especially to na_th_an who is the only person so far to give feedback…

    ... a back buffer in non-contended RAM and add dirty cell ...
    Paradigm Shifter Paradigm Shifter February 2010 Games
  • Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…

    ... going somewhat faster due to contended memory not being yet emulated ...
    Madonna Mk 2 Madonna Mk 2 February 2010 Emulators
  • Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…

    ... program that relies on accurate contended memory/floating bus emulation will ...
    Madonna Mk 2 Madonna Mk 2 February 2010 Emulators
  • Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…

    ... ]

    After dealing with contended memory and the floating bus ...
    Madonna Mk 2 Madonna Mk 2 March 2010 Emulators
  • Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…

    ... (i.e. still no accurate contended memory/floating bus emulation.)
    Madonna Mk 2 Madonna Mk 2 March 2010 Emulators
  • Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…

    ... on the following release. Real contended memory, floating bus and machine ...
    Madonna Mk 2 Madonna Mk 2 March 2010 Emulators
  • Is there any video input on expansion bus?Imagine you want to build a custom display hardware, for instance, to add hardware sprites to display. Is it possible to design such a device so that…

    ... is doing something with non contended memory, and no VRAM data ...
    mcleod_ideafix mcleod_ideafix March 2010 Hardware
  • Is there any video input on expansion bus?Imagine you want to build a custom display hardware, for instance, to add hardware sprites to display. Is it possible to design such a device so that…

    ... is doing something with non contended memory, and no VRAM data ...
    Alcoholics Anonymous Alcoholics Anonymous March 2010 Hardware
  • Spectrum 2-3 times more powerfull than MSX?![url]http://www.youtube.com/watch?v=2-kI0urN9tI#t=8m18s[/url]

    ... [/i] of waitcycles to any contended memory (aka screen) accesses :-)
    Philip Kendall Philip Kendall March 2010 Sinclair Miscellaneous
  • Spectrum 2-3 times more powerfull than MSX?![url]http://www.youtube.com/watch?v=2-kI0urN9tI#t=8m18s[/url]

    ... will be corruption. Outside the contended zone, there's no need ...
    Metalbrain Metalbrain March 2010 Sinclair Miscellaneous
  • CPI emulationI'm currently writing Sinclairean's emulation assembly for the CPI/CPD/CPIR/CPDR instruction group. Does anybody know what exactly the behavior of th…

    All 5 are contended (48K/128K ULAs, not for the +2a/+3) with contention based on the address in HL. And there is no write as you say :)

    The same goes for the extra 5 for the repeating varieties.
    Woody Woody March 2010 Emulators
  • CPI emulationI'm currently writing Sinclairean's emulation assembly for the CPI/CPD/CPIR/CPDR instruction group. Does anybody know what exactly the behavior of th…

    ... is why all those IR contended cycles have an effect also ... wiki - the final ir:1 contended cycle for LD I,A ...
    Woody Woody March 2010 Emulators
  • Problem with Spin 0.7s +3 file I/OI'm currently trying the +3 disk functions in z88dk. I've based my work upon the simple snippet Winston posted a while ago, but doing the contrary. H…

    ... the stack to be in contended ram so a better location ...
    Alcoholics Anonymous Alcoholics Anonymous March 2010 Emulators
  • Games hacked to be played with Sinclair Joystick #1 (67890)I have mentioned a few of these in other threads, but I think they kinda deserve their own... I have been hacking a few of my favorite games which ha…

    ... /> LD A,239
    NOP
    NOP
    IN A,(254)
    LD A,247
    NOP
    NOP
    IN A,(254)
    LD A,239
    NOP
    NOP
    IN A,(254)
    AND 16
    NOP
    NOP
    NOP
    NOP
    OR E
    Tom-Cat Tom-Cat March 2010 Games
  • Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…

    ... the slight speed loss of contended RAM. It loads a number ...
    ajmoss ajmoss April 2010 Hardware
  • Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…

    ... the slight speed loss of contended RAM. It loads a number ... ROM routine runs, then (possibly contended) RAM should only be accessed ... when loading or saving to contended RAM. And on 16K/48K ... to the lower 16K RAM (contended). On 16K models, that's ...
    RetroTechie RetroTechie April 2010 Hardware
  • Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…

    ... allow for the possibility of contended RAM.
    ajmoss ajmoss April 2010 Hardware
  • IM2 Loading on +3EHi there Speccy Guru's, As some of you know, I've spent a while building the ultimate image for +3e, it's currently at 6000+games and demos and i've…

    ... longer/shorter due to different contended ram banks on newer/older ...
    nuggetreggae nuggetreggae April 2010 Development
  • Flicker fixer for ZX 48KHas anyone the schematics for the flicker fixer: [URL]http://8bit.yarek.pl/computer/zx.48/[/URL] Micky

    ... be able to detect a contended memory access, and will cause ...
    mcleod_ideafix mcleod_ideafix April 2010 Hardware
  • Flicker fixer for ZX 48KHas anyone the schematics for the flicker fixer: [URL]http://8bit.yarek.pl/computer/zx.48/[/URL] Micky

    ... in IORQ cycle speed-up contended ports adress (OUT/IN instructions ...
    velesoft velesoft April 2010 Hardware
  • IM2 Loading on +3EHi there Speccy Guru's, As some of you know, I've spent a while building the ultimate image for +3e, it's currently at 6000+games and demos and i've…

    ... done on a machine with contended screen memory (it requires too ...
    gasman gasman April 2010 Development
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