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<1234567…34>
  • How old is retro?In the thread: [URL]http://www.worldofspectrum.org/forums/showthread.php?t=24327[/URL] the age old question of "[I]How old does a computer/console …

    ... involve dividing the PC's evolution into either time periods or ...
    ewgf ewgf March 2009 Chit chat
  • How feasible is it to add a second CPU to the ZX Spectrum?Today with IDE, and USB, and TCP/IP and other wonderful technologies arriving on the ZX Spectrum, I'm beginning to wonder if we'll run out of CPU tim…

    ... and fourth?) Z80 shared our contended memory, then we could "easily ... CPU1, has access to the contended memory, but only when neither ...
    wilsonsamm wilsonsamm June 2009 Hardware
  • Skooldaze TooDear WoSsers, Thanks to Skoolkid's disassembly I'm attempting to write a new "improved" version called [B]Skooldaze Too[/B]. As part of the improvem…

    ... ) It doesn't run in contended RAM so much. The new ...
    Jimmy Jimmy July 2009 Development
  • Where's the border line between a Spectrum and something else?I mean: there are purists out there that consider that anything that is not a true Sinclair Spectrum, with a true Z80 and a true ULA, and at most, 48…

    ... "the ultimate Spectrum" or "the evolution that the Spectrum should have ...
    mcleod_ideafix mcleod_ideafix August 2009 Development
  • The ---- Games of the decadeIn a few months time, we leave the first decade of the twenty-first century, so to rip off a thread idea from another forum, what are your games of t…

    ... there's little, if any, evolution to the game. I mean ...
    ewgf ewgf September 2009 Chit chat
  • RetroMa??a 09Last week the association [url=http://www.retroaccion.org/]Retroaccion[/url] celebrated "[url=http://www.retroaccion.org/retromania-2009]RetroMa??a[/…

    ... had another exposition about the evolution of portable videoconsoles in last ...
    zyloj zyloj November 2009 Sinclair Miscellaneous
  • PentEvo/ZX Evolution PreviewCheck this -> [url]http://www.youtube.com/user/3ASOFT[/url] some Videos showing the PentEvo/ZXEvo ([url]http://www.nedopc.com/zxevo/zxevo.php[/url])…

    Check this -> [url]http://www.youtube.com/user/3ASOFT[/url]

    some Videos showing the PentEvo/ZXEvo ([url]http://www.nedopc.com/zxevo/zxevo.php[/url]) in action.

    Keep in mind, this is a FPGA based Pentagon Clone (with the right ...
    Shockwav3 Shockwav3 November 2009 Hardware
  • New interface for ZXThis is my old (2004) unfinished project of internal interface for ZX Spectrum 128+2: ([url]http://velesoft.speccy.cz/hardware_in_development.htm[/u…

    ... /> Speed-up slow ZX memory (contended memory pages)
    Hardware unrainer ...
    velesoft velesoft December 2009 Hardware
  • More questions to ponder/argue/ignore as you wish...Just copying some stuff to a memory stick, and I found some old questions I'd intended to post on these forums to provoke debate, that I'd never got …

    ... online gaming, next Saturday the evolution of game types since computer ...
    ewgf ewgf February 2010 Chit chat
  • Sinclairean A3[B]Sinclairean[/B], a new ZX Spectrum emulator written in machine code for x86-compatible, OpenGL-capable computers. Features: [LIST] [*]Fast machin…

    ... is used as stub
    [*]Contended memory not emulated yet
    Madonna Mk 2 Madonna Mk 2 February 2010 Emulators
  • JSpeccy: New emulatorHi there, Jos? Luis S?nchez (zx81 at ono dot com) has developed a new ZX Spectrum emulator in Java, with a very accurate Z80 emulation. The message …

    ... /> - MEMPTR internal register emulation
    - Contended-memory emulation
    - Border effects ...
    jpablo jpablo March 2010 Emulators
  • 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…

    [url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url]
    [quote]Memory banks 1,3,5 and 7 are contended.[/quote]

    Really? I thought it was banks 4, 5, 6 and 7 that are contended.
    ajmoss ajmoss April 2010 Hardware
  • Contention detectionJust a thought, based on discussion elsewhere... Is there any way of telling if reads/writes are being contended around the time that they happen? L…

    ... if reads/writes are being contended around the time that they ...
    joefish joefish April 2010 Development
  • +2A extended memory map & ULA bug?The [URL="http://www.worldofspectrum.org/faq/reference/128kreference.htm"]128K reference page[/URL] says: [quote]The ULA bug which causes snow when I…

    ... is set to point to contended memory still occurs, and also ... is set to point to contended memory.[/quote]

    Will ... mode, with RAM bank 4 (contended memory) in 0x0000-0x3FFF, and ...
    ajmoss ajmoss June 2010 Hardware
  • contended memory...so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct …

    so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct place

    can it be altered on the toastrack and grey +2 to match the the +2a/b and +3?
    BiNMaN BiNMaN January 2011 Hardware
  • Contention: LDI vs LD (ss), rAccording c.s.s. FAQ: instruction LD (ss),r breakdowns as pc:4,[b]ss:3[/b] and LDI as pc:4,pc+1:4,hl:3,[b]de:3,de:1 x 2[/b] can anyone explain why …

    ... ] means that DE pointing to contended memory introduces 3 delays ?
    Fikee Fikee February 2011 Development
  • Do you believe in alien life?Do you believe in alien life? That is, life anywhere but on Earth? So do you believe that there is life on other planets, or do you instead believ…

    ... or unlikely the process of evolution leading to life is, but ...
    ewgf ewgf February 2011 Chit chat
  • Z80 (sna) => tap??Hi. I have a question about any convertor (it can be for DOS too) that can convert snapshots into most _regular_ TAP file, without any turbo modes …

    ... it too with my Spectrum Evolution - but I wanted also something ...
    Mister Beep Mister Beep March 2011 Emulators
  • FAO: Maintainers of ZX Spectrum Technical WikiThere's some odd write-up in French (???) in the contended memory article [URL="http://scratchpad.wikia.com/wiki/Contended_memory"]here[/URL]. I'm …

    There's some odd write-up in French (???) in the contended memory article [URL="http://scratchpad.wikia.com/wiki/Contended_memory"]here[/URL].

    I'm guessing this has zilch to do with speccy in general and contended memory in particular. ;)
    Arjun Arjun April 2011 Sinclair Miscellaneous
  • Something impossible has happened.Scientists have discovered a new force emitting from the core of the Sun. It is responsible for accelerating the decay rate of matter. It has been …

    ... be responsible for mutating species (evolution) in our history?

    FrankT FrankT May 2011 Chit chat
  • Jet Set Willy Turbo edition!Improve the speed of the game with just a few pokes! Do the standard CLEAR 32767 : LOAD "" CODE to get at the BASIC loader (see Your Spectrum issue …

    ... -buffer wasn't kept in contended memory) The LDI instructions are ...
    Jimmy Jimmy May 2011 Sinclair Miscellaneous
  • Computer gaming industry "heroes"From the web page ( [url]http://content.usatoday.com/communities/gamehunters/post/2011/05/poll-molyneux-miyamoto-top-world-game-development-heroes/1?…

    ... The Sims, and the ambitious evolution simulation Spore.

    [B ...
    ewgf ewgf May 2011 Chit chat
  • Issue 3V - anyone got one?As the title says really! :) According to [url]http://www.users.globalnet.co.uk/~jg27paw4/yr07/yr07_33.htm[/url] issue 3V motherboards have 64K RAM …

    ... - including one bank which is contended - is a major revision, and ...
    Spirantho Spirantho June 2011 Hardware
  • Anyone interested in a ZS Scorpion 256 Turbo+?[url]http://zx.pk.ru/showthread.php?t=16169[/url] This guy is producing PCBs and I'd arrange a mass order for europe if there's enough interest. I'd…

    ... onboard. Has 256k of non-contended RAM in this configuration (runs ...
    Shockwav3 Shockwav3 July 2011 Hardware
  • 128K Contention - How to get it right?With my recent hardware hackery, I've built a 128K (toastrack) clone. I can't quite get the contention right though. What I'm lack is a clear descri…

    ... B0 implies odd pages are contended, however banks 5-7 should ... be contended on a 128.... or is ...
    csmith csmith July 2011 Hardware
  • 128K+2A/+3 RAM layoutDoes anybody know how physical RAM is mapped to ZX 128k+2a/+3 address space ? There are four 64Kx4 chips IC4-IC7. IC4-IC5 seems to be contended (vide…

    ... . IC4-IC5 seems to be contended (video RAM). It would mean ...
    kpuchatek kpuchatek July 2011 Hardware
  • csmith talks about games/ULA book on EITBHere is what looks like a very rough edit, courtesy of EITB (Basque country TV) with Chris Smith about the ULA book and game engines of back in the d…

    ... /> The talks were about the evolution of video games during the ...
    Winston Winston July 2011 Sinclair Miscellaneous
  • Justin Beeper - new demo for the unexpanded 16K Speccy[img]http://pouet.net/screenshots/57726.png[/img] This was my entry for this weekend's [url=http://www.sunrisedemoparty.co.uk/]Sunrise[/url] demo pa…

    ... ROM. And doing everything in contended RAM means you're quite ...
    gasman gasman September 2011 Announcements
  • NedoPC.comHas anyone on here bought anything from this website as i was going to buy as ZX Evolution but i am in 2 minds about it. I had an email saying they w…

    ... going to buy as ZX Evolution but i am in 2 ...
    morcar morcar September 2011 Chit chat
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