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<1234567…34>
  • Fuse for Mac OS X 0.8.0.1A bug fix version of Fuse for Mac OS X has been released soon or already here at WoS and at the dedicated sourceforge project: [url]http://sourcefor…

    ... -0.3.0.1
    [list]
    [*] Fix IN timings and floating bus ...
    Fred Fred May 2007 Emulators
  • RUSSIAN SOFTWARE and real ZXRussian ZX games is writed on russian ZX clones and support hardware feature TURBO OFF ( for ZX clone ZS SCORPION ). Russian ZX clone ZS SCORPION use…

    ... and CPU read data from floating bus ( value #FF ). Software TURBO switching ... SCORPION is on ZX+2A/+3 models ifnored (without effect) and ... always at original ZX speed (3.5 MHz)

    ... ZX128 models(ZX128/+2/+2A/+3/russian clones):
    [IMG]http ...
    velesoft velesoft October 2008 Games
  • 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…

    ... -A15 during an I/O bus cycle.

    What ... Z80 wants to initiate a bus cycle that might affect ... Z80 can only read FFh (floating bus).

    Convinced myself ... only contends the I/O bus cycle if A8-A15 ... models (issue 2, issue 3 with a 5C112E-2 ULA ...
    mcleod_ideafix mcleod_ideafix January 2009 Hardware
  • Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…

    ... start a game, because the floating bus effect can make arbitrary data ... all be 0?
    * bits 3-2 (up/down) will never ...
    ajmoss ajmoss April 2010 Hardware
  • Emulating the 128KeIt occurs to me that I wasn't frequenting WoSf when I created the 128Ke standard, which means some people haven't heard of it. Here it is: [url]http…

    ... works on a 48K issue 3 machine and anything that works ... of the 128s (excluding the +3). Everything just works. If you ... . This will even work for +3 and Pentagon titles that don ... plus software that requires the floating bus. 128 software that requires the ...
    chev chev April 2011 Emulators
  • ZX Spectrum 48K clone and test resultsHi! This is my first post, so, first of all, I'd like to say hello to the whole community! I am Alessandro Dorigatti from Italy and I'm developing …

    ... it mounts a real Z80, 3 SRAM chips (512K, 128K, 512K ... aligned with the sea, Arkanoid (floating bus version) works fine.

    adorigatti adorigatti July 2011 Hardware
  • A new ZX spectrum cloneOver the past 12 months i have been developing a new spectrum clone as a hobby project to waste my spare time on. It is still not fully complete yet …

    ... is as follows:
    3.5MHz Z80 CPU with 7MHz ... with 48K display timings
    Floating bus and contention emulation model (not ... with digital TVs)
    Expansion bus connector


    ... load
    Implement a floating point co-processor usable as ...
    mspec mspec August 2012 Hardware
  • Enable 128kB paging in emulatorFrom Zx Spectrum documentation ([url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url]) [CODE][SIZE="1"]When memory is being pag…

    ... 0x7ffd produces no special results: floating bus values will be returned as ... at 0xc000.

    Bit 3: Select normal (0) or shadow ...
    Ralf Ralf June 2013 Emulators
  • Tricky ZX RepairHello guys, This time I put my hands on a very nice Issue 3 16K, upgraded to 48K. To bertter explain "nice", it is absolutely mint, not a scratch on…

    ... on a very nice Issue 3 16K, upgraded to 48K. To ... , halting with the first 1/3 of the screen still with ... to switch on the scope. Floating bus seems to behave okay. DMM ... 's nothing else on the bus. Logic levels on the Z80 ...
    Falco-F8L Falco-F8L December 2013 Hardware
  • [NEW] Retro Virtual Machine v1.0.0 for OSX released!!!!Here it is! Retro Virtual Machine v1.0.0 RELEASED!!!! Many thanks first to Patrik Rak for the PZX format and for their Z80 tests without which RVM…

    ... accurate).
    Emulation of the ‘floating bus’
    Emulation of the contended ... (I think).
    40 tracks (3’’) and 80 tracks double side ... (3’’ 1/2) supported.
    ... view in the ZX Spectrum +3.
    Snapshot’s management view ...
    jcgamestoy jcgamestoy September 2015 Emulators
  • New stable version ZEsarUX-4.2Hi everyone! I have uploaded a new stable version of ZEsarUX emulator, version 4.2. You can download it from: https://sourceforge.net/projec…

    ... 3ffd and crashes running +2A/+3 ROMS with real video enabled ... symbol (*) is shown
    Improved floating bus value
    Updated Z88 OZ ...
    chernandezba chernandezba December 2016 Emulators
  • New emulator - Spectramine v.1.0b releasedI post the first release of my Spectramine emulator, with minimal functionality, for public testing of emulation quality and compatibility with games…

    ... him for that!). Also, floating bus of +2A/+3 is emulated.

    weiv weiv September 2017 Emulators
  • SpecIde updated!Hi, all! In these past months I've been brushing up a bit my emulator, SpecIde, a.k.a. the least efficient emulator in the world. At this momen…

    ... extras. (Issue 2/3, contended memory, floating bus, snow effect...)
    floating bus, snow effect...)
    ... 3. (This is new; I've implemented the contended memory, floating bus ... -so-good FDC765 and +3 disk drive emulation. Read ...
    TheMartian TheMartian May 2019 Emulators
  • ZXDS 2.0.0Hello, after few months of intense work, I am finally ready to announce [url="http://zxds.raxoft.cz"]new ZXDS release[/url] for Nintendo 3DS. The …

    ... instead of WEP, or floating bus emulation for +2A/+3 machines.

    Patrik Rak Patrik Rak December 2019 Emulators
  • Compatibility of Spectrum 128K and +3I wondered if the are any compatibilty problems between software running on the 128K and the +3. e.g. if I would connect a disk drive to the 128K wou…

    ... to define the lack of floating bus as an extension, in which ... use!), will run on a +3, won't run on a ...
    Philip Kendall Philip Kendall March 2003 Sinclair Miscellaneous
  • Detecting +3 or +2AIs it possible to detect whether your BASIC program is running on a +2A/+3 or a proper 128?

    ... 255 used for on the +3?
    [/quote]

    Testing ... port. The +2A/+3 don't have a floating bus effect so you ...
    Woody Woody August 2003 Sinclair Basic
  • bug in spectaculator? Hi Jon, While testing the AMX mouse emulation in Spectaculator I noticed that the mouse buttons don't work. My program reads port $df to detect mo…

    ... only puts bits on the bus when you press a button ... of screen and attribute bytes (floating bus effect).

    [quote]
    3-buttoned affair ;)

    The ...
    Jon Needle Jon Needle August 2003 Emulators
  • Games not working on the plus 2a/plus3Can anyone please tell me the name of any games that would not work with the plus 2a/plus 3 even in 48k mode? Games that were simply not compatable …

    There was a version of Cobra on a Plus 3 compilation disk: The Magnificent Seven, which must use some alternative to the floating bus.

    Derek
    dmsmith dmsmith October 2004 Sinclair Miscellaneous
  • Games not working on the plus 2a/plus3Can anyone please tell me the name of any games that would not work with the plus 2a/plus 3 even in 48k mode? Games that were simply not compatable …

    ... with the plus 2a/plus 3 even in 48k mode?[/quote ... to mind due to the floating bus issue.[/quote]
    There are ...
    secarica secarica October 2004 Sinclair Miscellaneous
  • Shoot-em-up gameHi everyone, For just over a month I have been working on a shoot-em-up game along the lines of Sidewize / Zynaps, ie. right to left scroller. It is…

    ... 'd, but I use the floating bus to do it. I guess ... that the floating bus can't be exploited on +2, +3, so i ...
    dmsmith dmsmith October 2004 Development
  • Shoot-em-up gameHi everyone, For just over a month I have been working on a shoot-em-up game along the lines of Sidewize / Zynaps, ie. right to left scroller. It is…

    ... meant that the floating bus is not available in +2a/+3 modes, where ...
    Dunny Dunny October 2004 Development
  • SPIN & port #FFHow to solve a problem with port #FF on SPIN? This prevent me from creating correct RZX-file with Short Circuit, part 1.

    What problem are you having?

    Port $FF is an unattached port - it will reliably return $FF on a read in +2a/+3 hardware, and floating bus results for any prior models.

    D.
    Dunny Dunny November 2004 Emulators
  • fzx32 on GP32 progressing nicelyJust to let you know that Rlyeh is working hard on his ZX Spectrum emulator fZX32 for the GP32 and should be released in the near future. Its based…

    ... +2, ZX +2A and ZX +3 spectrum models.
    - Full working ... /> - Accurate border emulation,
    - AY-3-8912 and beeper sound emulation ... emulation (multicolor effects),
    - Preliminary floating bus emulation,
    - Virtual Keyboard suppoprt ...
    Antiriad Antiriad December 2004 Emulators
  • How to detect 48k modeHow can you detect if a 128k machine is in 48k mode (from an emulation point of view, not via BASIC or machine code)? Checking the current rom? But …

    ... decoded and it returns the floating bus.
    [quote]
    2) When ... SPECTRUM command.
    [quote]
    3) What is PSG?!? I'm ... /> It's just the AY-3-8912A soundchip used in 128K ...
    Luca Luca March 2005 Emulators
  • Pocket Clive - 2 QuestionsHello, I've just started using Pocket Clive on my iPaq pocket PC, excellent emulator BTW. 1. I have just wrote a small BASIC program to randomly pi…

    ... tapfile into SPIN

    3. In SPIN, Select "Tools" -> ... /> The pokes simply bypass the "floating bus probe", and install the HALT ... for putting me onto the "floating bus" issue - I would never had ...
    Digital Prawn Digital Prawn December 2005 Emulators
  • 128k, +2, +3ok i`ve asked a lot of questions over the few days but this is gonna be my final one on whats what unless i get lost once i get my apeccy so here goe…

    ... .

    The +2a and +3 are the top of the ... a complete disk operating system. 3" disks can be a twat ... to load from tape in +3 BASIC (and on a +2a ... games which take advantage of floating bus behaviour on the 48k/128k ... not work on a +2a/+3.

    D ...
    Dunny Dunny December 2005 Hardware
  • 128k, +2, +3ok i`ve asked a lot of questions over the few days but this is gonna be my final one on whats what unless i get lost once i get my apeccy so here goe…

    ... I've ever encountered the 'floating bus' bug. Everything I've ...
    I went for the +3 because of its modability. I ... the casing. Bought a +3 mainboard and a +2a ... floppy drive and added a 3.5" PCXT floppy drive ... I would go for the +3 though, simply because of ...
    KeepGood KeepGood December 2005 Hardware
  • 128k, +2, +3ok i`ve asked a lot of questions over the few days but this is gonna be my final one on whats what unless i get lost once i get my apeccy so here goe…

    ... or Cobra working on your +3 - they won't work, to ... but two.

    The floating bus was an effect that meant ...
    Dunny Dunny December 2005 Hardware
  • 128k, +2, +3ok i`ve asked a lot of questions over the few days but this is gonna be my final one on whats what unless i get lost once i get my apeccy so here goe…

    ... :
    There's that damn floating bus again!

    [/quote ... the floating bus is not implemented in hardware on unmodded +2a/+3 systems ... emulators do not emulate the floating bus effect, I don't ... the above posts,I think floating bus code can pretty much ...
    Digital Prawn Digital Prawn December 2005 Hardware
  • Spectrum Game CompatibilityHi, At the moment I have a spectrum 48k. I am planning to get a 128k +2, but I have a problem. Will my 48k games work on 128k +2? Because some of the…

    ... ]

    The +2a and +3 had severe incompatibility issues for ... the ULA and removed the floating bus effect. Although this was a ...
    Dunny Dunny April 2006 Hardware
<1234567…34>

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