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<1…16171819202122…34>
  • just thinking about ...compo for zx 16k ? anyone ?

    ... all the lower RAM is contended. Don't see why ULAplus ...
    chev chev November 2009 Development
  • just thinking about ...compo for zx 16k ? anyone ?

    ... all the lower RAM is contended. Don't see why ULAplus ... without it, whole memory is contended, you really have not place ...
    Fikee Fikee November 2009 Development
  • Spin Assembler DirectivesLeading on from [URL="http://www.worldofspectrum.org/forums/showpost.php?p=402514&postcount=65"]jp's recent post in Spin 0.7 Public Testing thread[/U…

    ... : 55+($FFEDB8 shl 8)), (S: 'LDI'; I: 56+($FFEDA0 shl 8 ...
    Dunny Dunny November 2009 Emulators
  • Spin Assembler DirectivesLeading on from [URL="http://www.worldofspectrum.org/forums/showpost.php?p=402514&postcount=65"]jp's recent post in Spin 0.7 Public Testing thread[/U…

    ... : 55+($FFEDB8 shl 8)), (S: 'LDI'; I: 56+($FFEDA0 shl 8 ...
    jp jp November 2009 Emulators
  • Project OTLA / k7zx (high speed loading)Hello, I am proud fan of zx spectrum (I do not have speccy, but clones (Didaktik Gama, Didaktik M)), I am using portable CD player to load games. Al…

    I haven't looked at the OTLA code, but I suspect it wouldn't run correctly from screen memory, since it's highly timing-critical and 16384-32767 is contended memory.
    gasman gasman November 2009 Sinclair Miscellaneous
  • Need help with interrupts againI'm fighting to understand how interrupts code handling works I'm trying to set my simple own interrupt routine, as I don't want to be dependent on …

    ... :- setting I to point into contended memory can cause snow in ...
    Alcoholics Anonymous Alcoholics Anonymous November 2009 Development
  • Need help with interrupts againI'm fighting to understand how interrupts code handling works I'm trying to set my simple own interrupt routine, as I don't want to be dependent on …

    ... set the I-reg to contended memory. When I loaded the ...
    Dr BEEP Dr BEEP December 2009 Development
  • Need help with interrupts againI'm fighting to understand how interrupts code handling works I'm trying to set my simple own interrupt routine, as I don't want to be dependent on …

    [QUOTE=Alcoholics Anonymous;403959]It looks ok to me except for one thing :- setting I to point into contended memory can cause snow in the display in some (most? all?) models.[/QUOTE]

    Snow effect doesn't exist in +3/+2A models.
    Metalbrain Metalbrain December 2009 Development
  • Imagine loading by tape nowadays!!!!I was bored so i did some working out how long it would take to load a more modern game at the rate old speccy tapes do which is 1500 bps (bits). 8 …

    ... .5Mbps when copying data to contended memory. Uncontended memory will be ...
    Winston Winston December 2009 Sinclair Miscellaneous
  • Memory concerns with z88dkI've retaken my old spectrum project and sadly I've reached a dead end very fast. I'll try to explain my worst problem in a few lines. I'm not a vet…

    ... 's just that it's contended memory but it would still ...
    Alcoholics Anonymous Alcoholics Anonymous December 2009 Development
  • Question on copying screen bufferHi, Al my prevoius games were copying graphics directly to screen memory starting at 16384. Now I'm experimenting with screen buffer where I could d…

    ... /> ldi
    ldi
    ldi
    ldi
    ldi
    ldi
    ldi
    ldi
    ldi
    ldi
    ldi ...
    ldi ...
    Bandit Bandit December 2009 Development
  • 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…

    ... a surprise, the issue of contended memory crashing does not affect ... attempt at executing code in contended memory (the region 16384-32767 ... dangerous.

    The contended pages are 1, 3, 5 ... crash when executing code in contended memory). Thus, you get ...
    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…

    ... 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
  • 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…

    ... , if not just use unsycronized LDI's )
    Fikee Fikee 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…

    ... rather I use REPT and LDI ENDR ;)

    I use ...
    Paradigm Shifter Paradigm Shifter February 2010 Games
  • 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…

    ... rather I use REPT and LDI ENDR ;)

    I use ... ;)[/QUOTE]

    Well using LDI's is much better than ... LDIR (Green Beret uses unrolled LDI loops et al). Strange that ...
    frobush frobush February 2010 Games
  • 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
  • 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…

    ... br /> ldi ; GNO
    ldi ; FLG1 LO
    ldi ; FLG1 HO
    ldi ; ...
    ldi ; TYP
    ldi ; XNO LO
    ldi ; XNO HL
    ldi ; YNO ... br /> ldi ; GNO
    ldi ; FLG1 LO
    ldi ; FLG1 HO
    ldi ; ...
    frobush frobush 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
<1…16171819202122…34>

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  • I am currently watching.....
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  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
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