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  • RGB on speccy ?hi, just a question : are you aware of scene demo trying emulate rgb ? i was a bit ill last few days so laying in bad i come with a (stupid ?) idea.…

    ... on a real Spectrum, memory contention eats up too much time ...
    gasman gasman November 2008 Development
  • +2 grey PSU capacitor changeHi I opened up a +2 grey power supply (2.1A max output) unit in order to replace the aged electrolytic capacitor inside, just like I always do with …

    ... work this out with V=IR => 9 = 0.75 * R ...
    Winston Winston November 2008 Hardware
  • Fuse for Mac OS X beta releasesA beta version of Fuse for Mac OS X has been released at the dedicated sourceforge project: [url]http://sourceforge.net/projects/fuse-for-macosx/[/u…

    ... (but probably not perfect) TS2068 contention (Philip Kendall).
    [*] Various other ...
    Fred Fred November 2008 Emulators
  • ZX Spectrum (16K) sound/beepHi all, I think I'm in right place now, I've tried to find an answer how to generate two channel sound using ZX Spectrum 16K. Only think I've found …

    ... will get hit by memory contention which will tend to distort ...
    Matt_B Matt_B November 2008 Sinclair Basic
  • ZX Spectrum (16K) sound/beepHi all, I think I'm in right place now, I've tried to find an answer how to generate two channel sound using ZX Spectrum 16K. Only think I've found …

    ... an example of how bad contention is, try using the Magical ... sounds awful in Spin with contention turned on though; music for ... timing loops to take memory contention into account. That's probably ...
    Matt_B Matt_B November 2008 Sinclair Basic
  • ZX Spectrum (16K) sound/beepHi all, I think I'm in right place now, I've tried to find an answer how to generate two channel sound using ZX Spectrum 16K. Only think I've found …

    ... sounds awful in Spin with contention turned on though; music for ... timing loops to take memory contention into account. That's probably ...
    jp44 jp44 November 2008 Sinclair Basic
  • Most HauntedHas anyone seen this show? I caught it a few nights ago and loved it for all the wrong reasons. Basically, the team walk around "haunted" houses arou…

    ... call it, is it 'Scriving' ir something like that?) when all ...
    ToxieDogg ToxieDogg December 2008 Chit chat
  • Dangerous Allram Mode On +2a / +3ZX Spectrum 128+2A and +3 support allram feature on port 1FFD. On this ZX models is very dangerous set allram if is connect any interface with extern…

    ... well known phenomenon of bus-contention.

    This is where ...
    Mark Wills Mark Wills December 2008 Hardware
  • Fuse PSP has been updated!The brilliant FUSE PSP has just been updated to Fuse 0.10.0.1 (FUSE PSP released on January the 1st, 2009), and is available at: [url]http://psp.ako…

    ... ? When I can use the IR keyboard with that emulator? Why ...
    Shadow Maker Shadow Maker January 2009 Emulators
  • Fuse PSP has been updated!The brilliant FUSE PSP has just been updated to Fuse 0.10.0.1 (FUSE PSP released on January the 1st, 2009), and is available at: [url]http://psp.ako…

    ... ]When I can use the IR keyboard with that emulator? Why ...
    ewgf ewgf January 2009 Emulators
  • IN 255 behaviour not emulated in Spectaculator and ZXSpinI'm not speaking about "normal" IN 255 behaviour. All of you know what I'm taking about: IN 255 can be used to "read" screen data as it's retrieved f…

    ... following the cycle requiring the contention to be applied.

    Bob Stains Bob Stains January 2009 Hardware
  • IN 255 behaviour not emulated in Spectaculator and ZXSpinI'm not speaking about "normal" IN 255 behaviour. All of you know what I'm taking about: IN 255 can be used to "read" screen data as it's retrieved f…

    ... following the cycle requiring the contention to be applied.[/QUOTE]

    Contention would apply when IORQ+A0 ...
    mcleod_ideafix mcleod_ideafix January 2009 Hardware
  • IN 255 behaviour not emulated in Spectaculator and ZXSpinI'm not speaking about "normal" IN 255 behaviour. All of you know what I'm taking about: IN 255 can be used to "read" screen data as it's retrieved f…

    [QUOTE=mcleod_ideafix;330315]Contention would apply when IORQ+A0 = ... Tech Info wiki! I/O contention isn't a simple on ...
    Philip Kendall Philip Kendall January 2009 Hardware
  • IN 255 behaviour not emulated in Spectaculator and ZXSpinI'm not speaking about "normal" IN 255 behaviour. All of you know what I'm taking about: IN 255 can be used to "read" screen data as it's retrieved f…

    ... emulator? If it's not contention, what is it?

    mcleod_ideafix mcleod_ideafix January 2009 Hardware
  • Other forums and why they piss me offI was on this site where you can download comics and ended up in the comicbook forum (my blame there) and all of a sudden just because I was giving m…

    ... that people who denied my contention that the word "Paki" is ...
    ewgf ewgf January 2009 Chit chat
  • Hi-colour gamesDoes anyone remember some of the games that used something called Ho-colour? Like the options page on the Agent X games, and a few others. If memory …

    ... know, pentagon has no memory contention (well, I might be totally ...
    Arda Arda January 2009 Games
  • 25 years with the SpectrumTo paraphrase JFK, ask not what your Spectrum can do for you, but what you can do for your Spectrum. Well I've done quite a bit since I joined the sc…

    ... need to know about memory contention, accurate Z80 emulation, proposed changes ...
    ewgf ewgf February 2009 Sinclair Miscellaneous
  • Your help needed![FONT=Arial]there are [URL="http://www.worldofspectrum.org/neededscreens.html"]a number of titles[/URL] (146) that still lack an in-game scre…

    ... " porque la descripcion iba a ir en el propio grafico de ...
    Digital Prawn Digital Prawn February 2009 Games
  • Your help needed![FONT=Arial]there are [URL="http://www.worldofspectrum.org/neededscreens.html"]a number of titles[/URL] (146) that still lack an in-game scre…

    ... " porque la descripcion iba a ir en el propio grafico de ...
    Ivanzx Ivanzx February 2009 Games
  • The best portable machine for Spectrum emulation?Which is the best portable or handheld device for Spectrum and non-Spectrum emulation? I only have a PSP, and whilst it has some good emulators, the …

    ... supported badly, no support for IR Keyboard for working as a ...
    Shadow Maker Shadow Maker February 2009 Sinclair Miscellaneous
  • The best portable machine for Spectrum emulation?Which is the best portable or handheld device for Spectrum and non-Spectrum emulation? I only have a PSP, and whilst it has some good emulators, the …

    ... supported badly, no support for IR Keyboard for working as a ...
    Dunny Dunny February 2009 Sinclair Miscellaneous
  • Component count/modern replacementsThere is a thread/project for replacing the old memory with simms There is also the ULA replacement. There's DEATH's composite replacement. What els…

    ... be compatible with 48K (ram contention), and there is no garantee ...
    roko roko February 2009 Hardware
  • What was the best 16K Spectrum GameOK, I'm putting up a poll, but its not really about the poll, but a chance to focus on the 16K gems. (The poll, taking those with the best WoS rating…

    ... 2 interrupts properly and memory contention slows code down by around ...
    Matt_B Matt_B February 2009 Games
  • Detecting Spectrum modelsIs there any sure-fire way a program can detect the model of machine it's running on (48K, +, 128, +2, +2A, +3, clones) even when running in the 48K …

    ... cycles between interrupts. The memory contention timings are also different between ...
    joefish joefish March 2009 Development
  • Detecting Spectrum modelsIs there any sure-fire way a program can detect the model of machine it's running on (48K, +, 128, +2, +2A, +3, clones) even when running in the 48K …

    ... cycles between interrupts. The memory contention timings are also different between ... [1] lets you know your contention pattern[2].

    [1 ...
    Philip Kendall Philip Kendall March 2009 Development
  • Who Are You Guys..... ???I'm curious to learn about the guys (and no doubt gals) who keep this forum alive. Were you all Spectrum-heads from the start? Did any of you come la…

    ... mistaken... (I just cant remember ir I was on my 1st ...
    VanTammen VanTammen March 2009 Games
  • Detecting Spectrum modelsIs there any sure-fire way a program can detect the model of machine it's running on (48K, +, 128, +2, +2A, +3, clones) even when running in the 48K …

    ... you run into the memory contention issues, which means the code ...
    joefish joefish March 2009 Development
  • Detecting Spectrum modelsIs there any sure-fire way a program can detect the model of machine it's running on (48K, +, 128, +2, +2A, +3, clones) even when running in the 48K …

    ... /> Interestingly, the way that the contention works actually serves to regulate ... line. It's having less contention on the +2A that mucks ...
    joefish joefish March 2009 Development
  • Cannon Fodder on GOG.com[url]http://www.gog.com/en/gamecard/cannon_fodder[/url] A classic game which made me wonder, could this have been ported to the Speccy in the right h…

    ... the pointer compared with the IR one.

    Then again ...
    ZnorXman ZnorXman March 2009 Chit chat
  • Cannon Fodder on GOG.com[url]http://www.gog.com/en/gamecard/cannon_fodder[/url] A classic game which made me wonder, could this have been ported to the Speccy in the right h…

    ... the pointer compared with the IR one.

    Then again ...
    polomint polomint March 2009 Chit chat
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Latest Posts

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Related Threads

  • Z80 cycle contentionHi,<br /> Does anybody knows exactly when the ula halts the Z80 clock during a memory r/w cycle?<br /> I mean which Z80 clock cycle, T1 or T2?<br /> …
  • Memory Map/ContentionHi <br /> I'm new to speccy coding (well I did some z80 coding a few years back - like 20yrs ago :) ), and I'd like to get back into writing some scr…
  • I/O contention model questionHi everyone,<br /> <br /> Sorry for my poor english. Together with a friend we are working on ZX<br /> Spectrum 48k implemented in FPGA. We have foun…
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  • Contention: LDI vs LD (ss), rAccording c.s.s. FAQ:<br /> <br /> instruction LD (ss),r breakdowns as pc:4,[b]ss:3[/b]<br /> and LDI as pc:4,pc+1:4,hl:3,[b]de:3,de:1 x 2[/b]<br /> …
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