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Search Again :: Adv Search 1000 results in 0.002s
<1234567…34>
  • ZXSpin 0.61 Available nowHi all! Well, after a lengthy few testing cycles, I'm taking the plunge and uploading the latest version of ZXSpin, to replace the rather aged old 0…

    ... more accurate "ULA snow" and IR contention. Note that truly accurate snow ...
    Dunny Dunny December 2006 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 …

    ... (ex. some tests in FuseTests, IR-Contention) and others show some glitches ... : Fusetest is OK, IOcontention OK, contention OK, Float48K OK, FloatSpy OK ...
    adorigatti adorigatti July 2011 Hardware
  • Robocop 3 and Spectrum 128K toast-rackHi all, we are going on with the tests on the new 128K emulator for the V6Z80p board, and we have found something odd: Robocop 3 (designed for the 12…

    ... ) apparently does port accesses creating IR contention (as, if we are right ...
    adorigatti adorigatti June 2012 Emulators
  • RealXThis may be a dumb question but will RealX ever get released?

    ... bottom of the doc about IR contention, even if not directly related ...
    Woody Woody August 2006 Emulators
  • Growing up... Jasmin supports 128/+2 nowHi, all. New version of Jasmin is available (v0.11). It supports ZX Spectrum 128 and ZX Spectrum +2 models. Try it [URL="http://www.dustedpixels.co…

    ... is both why you get contention only for contended memory, and ... get things like IR contention and I/O port contention, neither of which ... with our best knowledge of contention: if you want the latest ...
    Philip Kendall Philip Kendall May 2007 Emulators
  • Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…

    ... . However Spin 0.622 shows contention (presumably in 9th cycle of ... test, and the lack of IR contention in Spectaculator for that specific ...
    Woody Woody September 2007 Emulators
  • Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…

    ... .30 [/quote]

    The IR contention was added to the 7 ...
    Jon Needle Jon Needle September 2007 Emulators
  • Which is the most technically accurate Spectrum Emulator?Ok, which is the most technically accurate Spectrum Emulator? Please don't just vote but give reasons why.

    ... :-)

    Also passes your IR contention in 48k mode.

    Dunny Dunny May 2009 Emulators
  • ZXMMC+ emulation added to Z80p48K emulator for the V6Z80p+Hi friends! As time ago I've posted a thread about an FPGA clone for the V6Z80p board, I'd like to give an update about the status of the project. …

    ... to use the original ULA contention algorithm (as described in the ... you using the original ULA contention algorithm (as described in Chris ...
    - Ulatest3
    - BTime
    - IR-Contention
    - Shock megademo
    - No ...
    adorigatti adorigatti August 2011 Hardware
  • ZXMMC+ emulation added to Z80p48K emulator for the V6Z80p+Hi friends! As time ago I've posted a thread about an FPGA clone for the V6Z80p board, I'd like to give an update about the status of the project. …

    ... .

    I'm using contention as described by Chris in ... a real Z80.

    IR-Contention does some very odd things ...
    JeffB JeffB September 2011 Hardware
  • New software screenmode: aSmpI was planning to release this tool at Forever XIII, but they didn't accept it, this is my 30th year activity, my most ambitious work on zx spectrum …

    ... ula emulation (including memory and ir contention). As you provide mlt image ...
    Arda Arda July 2012 Announcements
  • ULA bug and snowI am tryng to improve the snow emulation in FBZX wii but I do not have a real spectrum to test the results. I used the information taken from Harele…

    ... RAS cycle is suppressed for contention with the refresh, the ULA ... /> FBZX wii does not emulate IR contention, so these results should be ...
    Oibaf Oibaf August 2012 Emulators
  • Contended Memory woes...Hello All, An iccle problem I have and was hoping one of you fine WoSers could bail me out again... :) I've noticed that my emulator is running sli…

    ... . Details on which instructions require IR contention can be found [URL="http ...
    Arjun Arjun June 2013 Emulators
  • Contended Memory woes...Hello All, An iccle problem I have and was hoping one of you fine WoSers could bail me out again... :) I've noticed that my emulator is running sli…

    ... . Details on which instructions require IR contention can be found [URL="http ... any further info on the IR contention? There doesn't seem to ... assume I just take the IR register as a 16 bit ...
    Korinel Korinel June 2013 Emulators
  • Contended Memory woes...Hello All, An iccle problem I have and was hoping one of you fine WoSers could bail me out again... :) I've noticed that my emulator is running sli…

    ... any further info on the IR contention? There doesn't seem to ... ]

    The Z80 places IR on to the address bus ... the ULA continues to see IR and contends as normal as ... all contended based on the IR value.
    Woody Woody June 2013 Emulators
  • Retroleum Nebula - A Spectrum ULA replacement moduleHey you guys.. Just wanted to mention a new Spectrum doobrie created by myself (Phil Ruston) and Alessandro Dorigatti: Namely, the Nebula - A Spec…

    ...
    - Ulatest3
    - FloatSpy
    - IR Contention (snow effect in place as ...
    adorigatti adorigatti April 2016 Hardware
  • Retro Virtual Machine is out!Fantastic emulator Retro Virtual Machine (@retrovm) is out today. It can emulates Amstrad/Sinclair models range. Give a try! http://www.retrovirt…

    ... />
    I ran the 48k contention test suite and it failed ... R register test and the IR contention test.

    Thought it ...
    rich_chandler rich_chandler December 2018 Emulators
  • Retro Virtual Machine is out!Fantastic emulator Retro Virtual Machine (@retrovm) is out today. It can emulates Amstrad/Sinclair models range. Give a try! http://www.retrovirt…

    ... />
    I ran the 48k contention test suite and it failed ... R register test and the IR contention test.

    Thought it ... />
    What is the 48k contention test???? Where i can download ...
    jcgamestoy jcgamestoy December 2018 Emulators
  • Retro Virtual Machine is out!Fantastic emulator Retro Virtual Machine (@retrovm) is out today. It can emulates Amstrad/Sinclair models range. Give a try! http://www.retrovirt…

    ... />
    I ran the 48k contention test suite and it failed ... R register test and the IR contention test.

    Thought it ... />
    What is the 48k contention test???? Where i can download ...
    rich_chandler rich_chandler December 2018 Emulators
  • Retro Virtual Machine is out!Fantastic emulator Retro Virtual Machine (@retrovm) is out today. It can emulates Amstrad/Sinclair models range. Give a try! http://www.retrovirt…

    ... />
    I ran the 48k contention test suite and it failed ... R register test and the IR contention test.

    Thought it ... />
    What is the 48k contention test???? Where i can download ...
    jcgamestoy jcgamestoy December 2018 Emulators
  • Retro Virtual Machine is out!Fantastic emulator Retro Virtual Machine (@retrovm) is out today. It can emulates Amstrad/Sinclair models range. Give a try! http://www.retrovirt…

    ...
    I ran the 48k contention test suite and it failed ... R register test and the IR contention test.

    Thought ...
    What is the 48k contention test???? Where i can download ... now the R contention test but not the ir... I Will investigate ...
    jcgamestoy jcgamestoy December 2018 Emulators
  • Retro Virtual Machine is out!Fantastic emulator Retro Virtual Machine (@retrovm) is out today. It can emulates Amstrad/Sinclair models range. Give a try! http://www.retrovirt…

    ... a problem with the 48k Contention Suite program.

    I ... /> Is not a bug. the IR contention test is triggering the Snow ...
    jcgamestoy jcgamestoy January 2019 Emulators
  • Retro Virtual Machine is out!Fantastic emulator Retro Virtual Machine (@retrovm) is out today. It can emulates Amstrad/Sinclair models range. Give a try! http://www.retrovirt…

    ... /> Is not a bug. the IR contention test is triggering the Snow ...
    rich_chandler rich_chandler January 2019 Emulators
  • Writing own emulator: Contention questionsHi! (I don't know if this message should be here or in Hardware) I'm trying to write my own emulator just for the sake of it, and I'm having pr…

    ... having problems understanding the memory contention in 48k, in instructions like ... /> In INC DE ( pc:4,ir:1 ×2 ) I totally fail ... why the IR register pair is being used there for contention.
    MrKii MrKii April 2018 Emulators
  • Memory Map/ContentionHi 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 scrolling…

    ... a correct map for memory contention?

    Address Size Area ...
    ZJones ZJones September 2006 Development
  • I/O contention model questionHi everyone, Sorry for my poor english. Together with a friend we are working on ZX Spectrum 48k implemented in FPGA. We have found bug in the Spect…

    ... .s faq describing I/O contention.

    The 48k ... to lead to the following contention patterns:

    High ... /> in 40 - 7F? | Low bit | Contention pattern
    ------------+---------+-------------------
    No | Reset ...
    brian-82 brian-82 February 2007 Development
  • Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…

    ... playing a bit with memory contention and floating bus stuff in ... sense it starts applying the contention a few cycles earlier, namely ...
    Patrik Rak Patrik Rak September 2007 Emulators
  • 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…

    ... whether the memory is in contention?
    joefish joefish April 2010 Development
  • 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…

    ... 0x7ffd, 0xbffd and 0x3ffd port contention behaviour.

    ... However, I find that contention is applied too often ... /> To correct the excessive contention, I replicated ULA14 and ULA15 ... someone describe accurately the contention behaviour for the 128K ...
    csmith csmith July 2011 Hardware
  • BIT b,(ii+n) contentionThe documentation says that BIT b,(ii+n) has this contention pattern: pc+1:4,pc+2:3,pc+3:3,pc+3:1 x 2,ii+n:3,ii+n:1 See [url]http://scratchpad.wiki…

    ... b,(ii+n) has this contention pattern:

    pc+1 ... Tstate.

    So the contention pattern should be:

    Oibaf Oibaf July 2012 Emulators
<1234567…34>

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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…
  • Contention and floating bus timingHello,<br /> <br /> I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit.…
  • Contention detectionJust a thought, based on discussion elsewhere...<br /> Is there any way of telling if reads/writes are being contended around the time that they happ…
  • 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 /> …
  • 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.<br /> <br /> What I'm lack is a …
  • 128K Contention - How to get it right?
  • BIT b,(ii+n) contentionThe documentation says that BIT b,(ii+n) has this contention pattern:<br /> <br /> pc+1:4,pc+2:3,pc+3:3,pc+3:1 x 2,ii+n:3,ii+n:1<br /> <br /> See [ur…

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