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<1…10111213141516…34>
  • I introduce myself and my emulator.Hi! My name is Marta, and I've been a Speccy user for 30+ years now. During the past year I decided to write my own emulator, just to see if I cou…

    Neat. Does it emulate the floating bus on the +2A/+3?
    Ast_A_Moore Ast_A_Moore March 2018 Emulators
  • I introduce myself and my emulator.Hi! My name is Marta, and I've been a Speccy user for 30+ years now. During the past year I decided to write my own emulator, just to see if I cou…

    [quote="Ast_A_Moore;936154"]Neat. Does it emulate the floating bus on the +2A/+3?[/quote]

    No, it doesn't yet :( I just did the +2A timings during the last month, and I forgot that there was a floating bus-like effect in these models...
    TheMartian TheMartian March 2018 Emulators
  • I introduce myself and my emulator.Hi! My name is Marta, and I've been a Speccy user for 30+ years now. During the past year I decided to write my own emulator, just to see if I cou…

    [quote="Ast_A_Moore;936154"]Neat. Does it emulate the floating bus on the +2A/+3?[/quote]

    lmao, give that person time! They already said there was stuff they needed to implement first lol
    polomint polomint March 2018 Emulators
  • I introduce myself and my emulator.Hi! My name is Marta, and I've been a Speccy user for 30+ years now. During the past year I decided to write my own emulator, just to see if I cou…

    ... . Does it emulate the floating bus on the +2A/+3?[/quote]

    rich_chandler rich_chandler March 2018 Emulators
  • I introduce myself and my emulator.Hi! My name is Marta, and I've been a Speccy user for 30+ years now. During the past year I decided to write my own emulator, just to see if I cou…

    ... . Does it emulate the floating bus on the +2A/+3?[/quote]

    2A timings during the last month ... forgot that there was a floating bus-like effect in these models ...
    Ast_A_Moore Ast_A_Moore March 2018 Emulators
  • I introduce myself and my emulator.Hi! My name is Marta, and I've been a Speccy user for 30+ years now. During the past year I decided to write my own emulator, just to see if I cou…

    ... I’d discovered the floating bus on the +2A/+3 back in 1987 ...
    rich_chandler rich_chandler March 2018 Emulators
  • Dual joystick interface schematic?Hi! Would anyone have a schematic for a dual joystick interface? Cursor or sinclair would either work. If not, I might try my hand at designing one.…

    ... /> Also note that with a Spectrum +2A / +3, keypress type joystick interfaces ... of the 8-but address bus being low. Most cheap clones ... the early years of the Spectrum. The original would clash with ... of the 8-bit address bus, but you could do better ...
    joefish joefish May 2018 Hardware
  • Vega Spectrum KeymapsHi everybody, I am new on here, so apologise if this is int the wrong category. I have searched the forums and can find some keymaps for the vega …

    ... doesn’t emulate the floating bus on the Spectrum, so my game doesn ... happen to a few other Spectrum games, e.g. [i]Cobra ...
    Ast_A_Moore Ast_A_Moore June 2018 Emulators
  • Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…

    ... ]
    If you mean the floating bus trick, then no. [i]Sidewize ... .com/zx/game_fixes.html"]ZX Spectrum Game Fixes[/url] page), that ...
    Ast_A_Moore Ast_A_Moore July 2018 Games
  • Which to buy? +2/+2a/+3?Sorry - I did a quick bit of lunchtime googling, it sounds like the grey +2 is the best machine, as it has the board without the reduced chipset. I …

    ... a +2A or +3 to fix the [s]floating point[/s] "floating bus" issue ... +3e ROM set in a +2A/+2B would be good ? (not ...
    spider spider September 2018 Hardware
  • [Asm] Is this nested loop faster than LDIR or a bunch of unrolled LDI's?Hi all. I'm learning Z80 asm on Speccy 48K, and to start with I decided to write my own "CLS" routine (without relying on ROM calls or LDIR) as a lea…

    ... ="ST1;947822"]I read your floating bus guide, it was fascinating. Made ... to come to terms with Spectrum’s hardware quirks, which are ...
    Ast_A_Moore Ast_A_Moore November 2018 Development
  • A Yankee in IraqI'm testing the game on the zx next and it currently hangs right after the game starts no matter what timing regimen and contention pattern is chosen…

    ... as possible to a real +2A/+3. Then the game will ... it’s running on a +2A/+3 and then makes the ... if we're on a +2A/+3. If we're not ... br />
    ld a,(2899) ;+2A/+3 ROMs return 126
    [/code]

    The floating bus loop itself looks like this ...
    Ast_A_Moore Ast_A_Moore February 2019 Development
  • Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…

    ... to fix it for the +2A/+3. For [s]incorrectly implemented ... fix[/url] that removes the floating bus dependence altogether. Both of these ...
    Hikaru Hikaru August 2019 Games
  • 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 ... ] also uses the floating bus. It even has a special +2A-compatible version ... exact same behavior on a +2A/+3.

    I’ve ...
    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!.…

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

    [i]Cobra[/i ... ] also uses the floating bus. It even has a special +2A-compatible version ... exact same behavior on a +2A/+3.

    I’ve ...
    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 ... any peripherals attached to the Spectrum? If you do, please remove ...
    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!.…

    ... an issue 6A Spectrum... it definitely does have the floating bus effect.
    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 ... any peripherals attached to the Spectrum? If you do, please remove ... used (Like a Virgin, ZX Spectrum, LOL) correct me if I ...
    TigerZX TigerZX September 2019 Hardware
  • 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 …

    ... nailed the sampling timing of +2A/+3 machines. At that point ... was believed there is no floating bus to test it with (which ... we discovered the difference between +2A and +3 screen paging pattern ...
    Patrik Rak Patrik Rak November 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 …

    [quote="Patrik Rak;57390"]floating bus emulation for +2A/+3 machines.
    [/quote]
    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 ... if) it worked on the +2A/+3. Hence the drop in ...
    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 also, decoding ... . 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, but it ... worked on shadow screen or floating bus yet.
    colonel32 colonel32 June 2020 Hardware
  • 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
  • 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[/…

    ... out with enhancements in Spectrum-Emulation. Download: [url ... --------------------
    - 7913: spectrum.cpp: Restored floating bus read functionality; bus/spectrum: Added two devices ... ]
    -zx spectrum: new slot devices, floating bus restore, big mface ...
    Luzie Luzie February 2022 Emulators
  • SPIN Public Beta 0.1b Available for downloadHi all, back again, and as just recently announced on CSS, SPIN has been updated. Here's the post to CSS (or the relevant parts): It's been a bu…

    ... /> Added ULA Snow effect, and Floating bus based on RamSoft's technical ...
    Dunny Dunny May 2002 Emulators
  • Random Smiley FacesAs promised, here's the Syntax: ;Startup 5 CLS 7 PAPER 0: BORDER 0 ;Graphics 10 FOR n=0 to 7 20 READ row: POKE USR "P"+n,row 30 NEXT n 31 DATA BI…

    ... is taken from the ZX Spectrum +2A manual...
    Feel free touse ...
    Takashi64 Takashi64 January 2003 Sinclair Miscellaneous
  • [NEW]: Spectaculator 4.0Hi everyone, Finally managed to finish it... enjoy! --- [NEW]: Spectaculator 4.0 Spectaculator is a Sinclair ZX Spectrum emulator for PCs runnin…

    ... is a Sinclair ZX Spectrum emulator for PCs running ... />
    o Emulation of Spectrum +2A in addition to 16k/48k ...
    o Load and save Spectrum screenshots (.scr) files.
    ... when emulating the
    48k spectrum.

    o ...
    Jon Needle Jon Needle January 2003 Emulators
  • ANN: Spectaculator 5.1Spectaculator is a Sinclair ZX Spectrum emulator for PCs running Windows 95, 98, ME, NT 4, 2000 and XP. Spectaculator emulates the 16K/48K/128K/+2/+…

    Spectaculator is a Sinclair ZX Spectrum emulator for PCs running Windows ... the 16K/48K/128K/+2/+2A/+3 Spectrums and plenty ... serial port of the Spectrum
    128/+2/+2A/+3. Output can ... parallel port of the
    Spectrum +2A/+3. Output can be redirected ...
    Jon Needle Jon Needle July 2003 Emulators
<1…10111213141516…34>

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