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<1…16171819202122…34>
  • ZX Spectrum rescued from a friend, has Issues.Hi guys, I've recovered this ZX spectrum 48K from a friend. It's a 1984 ISSUE 6A. He told me the last time it was turned on was about 30 years ago!.…

    ... ’s games that uses the floating bus for syncing. Try the original ... ) of games that use the floating bus:

    [i]Cobra[/i ... Fu[/i] also uses the floating bus. It even has a special ...
    TigerZX TigerZX September 2019 Hardware
  • ZX Spectrum rescued from a friend, has Issues.Hi guys, I've recovered this ZX spectrum 48K from a friend. It's a 1984 ISSUE 6A. He told me the last time it was turned on was about 30 years ago!.…

    ... how it would affect the floating bus, since the data lines are ... it might not exhibit the floating bus effect by design, but then ... the values on the bus when it’s floating. Or, it exhibits ...
    Ast_A_Moore Ast_A_Moore September 2019 Hardware
  • ZX Spectrum rescued from a friend, has Issues.Hi guys, I've recovered this ZX spectrum 48K from a friend. It's a 1984 ISSUE 6A. He told me the last time it was turned on was about 30 years ago!.…

    ... ... it definitely does have the floating bus effect.
    The results should ... should be setting the data bus lines to a voltage (logic ... CPU then sees the data bus value as 255.

    bus, I would expect a value ...
    1024MAK 1024MAK September 2019 Hardware
  • ZX Spectrum rescued from a friend, has Issues.Hi guys, I've recovered this ZX spectrum 48K from a friend. It's a 1984 ISSUE 6A. He told me the last time it was turned on was about 30 years ago!.…

    ... how it would affect the floating bus, since the data lines are ... it might not exhibit the floating bus effect by design, but then ... the values on the bus when it’s floating. Or, it exhibits ...
    TigerZX TigerZX September 2019 Hardware
  • ZX Spectrum rescued from a friend, has Issues.Hi guys, I've recovered this ZX spectrum 48K from a friend. It's a 1984 ISSUE 6A. He told me the last time it was turned on was about 30 years ago!.…

    ... it does pick up the floating bus values, just not as often ...
    Ast_A_Moore Ast_A_Moore September 2019 Hardware
  • Fastest emulator screen renderingHi, I'm developing an algorithm for fast emulator screen rendering and here is what I came up with. 1) Use 4bpp indexed image format as target …

    ... read whatever's on the bus, and detect that the ray ... />
    It's the ULA "Floating Bus" and yeah, it generally returns ...
    Dunny Dunny November 2019 Development
  • New emulator: InkSpector 2Hi, The first preview of InkSpector 2 is available from www.inkland.org.uk/inkspector/inkspec_2.0.0.27.exe It's a brand new emulator with all …

    ... 48K and +3. The +3 floating bus wasn't emulated though you ...
    Woody Woody November 2019 Emulators
  • New emulator: InkSpector 2Hi, The first preview of InkSpector 2 is available from www.inkland.org.uk/inkspector/inkspec_2.0.0.27.exe It's a brand new emulator with all …

    Thanks for those, Woody, I'll take a look. No, I hadn't implemented +3 floating bus at all.

    There's no such thing as "nitpicking" when it comes to Speccy emulation :)
    inky inky November 2019 Emulators
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    ... it really appear on the bus. Can you share?

    floating bus is incorrect - it's not ... get hold of the original floating bus test program which was used ...
    Patrik Rak Patrik Rak November 2019 Development
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    ... br /> 48K 128K +3 ULA bus
    -----------------------------
    14338 ... cases. The +2A/+3 floating bytes will appear on all ... contention on your page about floating bus is incorrect - it's ... hold of the original floating bus test program which was ...
    Ast_A_Moore Ast_A_Moore November 2019 Development
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    ... ]
    48K 128K +3 ULA bus
    -----------------------------
    14338 14364 14367 ... doubt you could really read floating bus from even ports.

    floating bus test just modified to use ...
    Patrik Rak Patrik Rak November 2019 Development
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    ... . I think it's stock floating bus test just modified to use ...
    Ast_A_Moore Ast_A_Moore November 2019 Development
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    ... . I think it's stock floating bus test just modified to use ...
    Hikaru Hikaru November 2019 Development
  • Fuse/SPIN vs Spectaculator border timingsHello, I'm trying to figure out at which moments the 48K ULA samples the current border color into its internal latch. To do that I wrote a small …

    ... was believed there is no floating bus to test it with (which ...
    Patrik Rak Patrik Rak November 2019 Emulators
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    ... 's the results from recent floating bus test 2, there were 2 ...
    Your Spec-chum Your Spec-chum November 2019 Development
  • How can i edit or delete my postHi I want to edit or delete comments or new discussion on other categories that i made, but i don´t know how to do it I don´t find any button …

    ... to resources (images, etc.). Our floating bus thread was recently affected by ...
    Ast_A_Moore Ast_A_Moore December 2019 WoS/Forum Issues
  • How can i edit or delete my postHi I want to edit or delete comments or new discussion on other categories that i made, but i don´t know how to do it I don´t find any button …

    ... to resources (images, etc.). Our floating bus thread was recently affected by ...
    hikoki hikoki December 2019 WoS/Forum Issues
  • 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 …

    [quote="Patrik Rak;57390"]floating bus emulation for +2A/+3 machines.< ...
    Ast_A_Moore Ast_A_Moore December 2019 Emulators
  • 50+ FPS GAMESHi guys) Which was the first Speccy game with 50/60 frames per second? And what was the main reason? Thank you

    ... I was working on the floating bust fix for [i]Sidewize ... ] and had Steve abandoned the floating bus concept. Probably for the same ...
    Ast_A_Moore Ast_A_Moore April 2020 Games
  • MultiCart for TC2068I've got one Portuguese Timex Computer 2068, but built-in AY sound chip and joystick interface are not widely used on this machine. Also compatibilit…

    @colonel32: There is no floating bus in +2A/B & +3 ... . In Timex there is no floating bus either and the paging in ...
    Claudius Claudius June 2020 Hardware
  • MultiCart for TC2068I've got one Portuguese Timex Computer 2068, but built-in AY sound chip and joystick interface are not widely used on this machine. Also compatibilit…

    There is a floating bus in +2A/B & +3, ... worked on shadow screen or floating bus yet.
    colonel32 colonel32 June 2020 Hardware
  • Why not more interest in C?Just curious. Not trying to provoke anything other than a discussion here. It would seem (to me) that it would be better for "Z80 beginners" to wr…

    ... will not tell you about floating bus etc. You still need the ...
    arttu arttu April 2021 Updates
  • zesarux emulator > pc keyboard mappingSorry that this is so trivial but I cannot find the "=" key which is fairly important

    ... slices and and the Spectrums floating bus.

    The program by ...
    moggy moggy May 2021 Emulators
  • The latest build of Specemu?The latest version of Specemu (a fantastic emulator, BTW) I have is SpecEmu-3.1.b150912.zip, which is a year old now, but knowing Woody he's probably…

    D’oh. The floating bus on the +2A/+3 is broken in this build. Build 271021 is fine, so I’m sticking with it.
    Ast_A_Moore Ast_A_Moore December 2021 Emulators
  • The latest build of Specemu?The latest version of Specemu (a fantastic emulator, BTW) I have is SpecEmu-3.1.b150912.zip, which is a year old now, but knowing Woody he's probably…

    ... /> Didn't fix the +3 floating bus for this release! (I knew ...
    Luzie Luzie December 2021 Emulators
  • New Version of MAME Emulator out with enhancements on Spectrum-EmulationNew Version 0.216 of MAME Emulator out with enhancements on Spectrum Emulation: [url="https://www.mamedev.org/?p=476"]https://mamedev.org/?p=476[/…

    ... /> - 7913: spectrum.cpp: Restored floating bus read functionality; bus/spectrum: Added two devices ... /> -zx spectrum: new slot devices, floating bus restore, big mface tidy-up ...
    Luzie Luzie February 2022 Emulators
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... earlier though (and he used floating bus in Cobra to start drawing ...
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • Data bus at interrupt timeIt is "well known" that some peripherals can put values other than 0xff on the data bus at interrupt time, thus meaning that IM2 is slightly more fid…

    ... than 0xff on the data bus at interrupt time, thus meaning that ...
    Philip Kendall Philip Kendall March 2009 Hardware
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