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<1234567…34>
  • LDIR timings in contended RAM?The 48K Spectrum technical reference page ([URL="http://www.worldofspectrum.org/faq/reference/48kreference.htm"]here[/URL]) describes the detailed ti…

    ... "]here[/URL]) describes the detailed timings of contended RAM. It gives ... timings for Z80 instructions that are ... ]" mean in that table of timings?
    ajmoss ajmoss June 2010 Development
  • 4116 SRAM replacement (and ULA timings).As mentioned in another thread, I have spent quite a lot of time experimenting with different circuits and components for using a static RAM IC to re…

    ... only suppose that memory access timings for the 5C112E are slightly ...
    Zorn Zorn February 2012 Hardware
  • Timex contended memory timings, the TS2068 kludge board and EXROM at $4000 - $7FFFI haven't seen this documented anywhere yet so I thought I'd share my findings. I've been investigating contended memory timings on the Timex Sinclai…

    ... 've been investigating contended memory timings on the Timex Sinclair 2068 ...
    rga24 rga24 May 2014 Hardware
  • New SPIN Update released (v0.1c)Hi all (again)! Here's the release for SPIN 0.1c, as detailed in CSS: --------------------------------------- Spin gets another, much smaller …

    ...
    environment, maintaining the 128k timings etc.

    It's ... currently selected hardware and the timings for it.
    48k Usr0 ...
    Dunny Dunny May 2002 Emulators
  • ANNOUCE: Spin Public Beta 0.1d now availableWell, after the overwhelming response to the previous announcement here on WOS Forums, I thought I'd best post that SPIN 0.1d is up. Here's the CSS …

    ... standard ROM loader and ROM timings.
    Fixed various bugs in ...
    Dunny Dunny May 2002 Emulators
  • GRM 128 for saleI've got ZX-Spectrum 128 clone for sale - "Grand Rom Max 128". It is in white metallic case with external keyboard. The computer contains Beta 128 di…

    ... -in 5,25" disk drive. Timings close to Pentagon 128. Works ...
    Mac Buster Mac Buster July 2003 Sales
  • Tough paging questionOK... Take this: 1. We have a program compiled and run from within GENS under a Pentagon 128K environment. 2. The program works perfectly. 3. We sav…

    ... rely on the machine's timings or special features, doesn't ...
    GOC GOC November 2003 Development
  • Release candidates for Fuse 0.7.0 and libspectrum 0.2.2Hi all. Release candidates for [url="http://fuse-emulator.sourceforge.net/fuse-0.7.0pre1.tar.gz"]Fuse 0.7.0[/url] (and [url="http://fuse-emulator.so…

    ... and ZXCF support.
    * Improved timings in the Z80 core and ...
    Philip Kendall Philip Kendall July 2004 Emulators
  • ANNOUNCE: Fuse for Mac OS X 0.7.0Following the release of Fuse 0.7.0 is the unsurprising release of Fuse for Mac OS X 0.7.0 which should be available for download shortly at the Fuse…

    ... bus emulation.
    + Improved display timings.

    New Mac only ...
    Fred Fred July 2004 Emulators
  • (Belated) ANNOUNCE: Fuse 0.7.0 and libspectrum 0.2.2 releasedThe Fuse team is pleased to announce that release of Fuse 0.7.0, the associated utilities and version 0.2.2 of the Spectrum emulator support library,…

    ... bus emulation.
    + Improved display timings.

    See the [url ...
    Philip Kendall Philip Kendall July 2004 Emulators
  • ANN: SpecEmu 2.3 - Minor UpdateHere's a minor update to the SpecEmu emulator - the emulator with an incredibly small filesize for a Win32 application, and backed up with an incredi…

    ... to some overlooked opcode contention timings.
    - Improved floating bus emulation ... cycle "correction" in the display timings.
    - Tape support for CSW ...
    Woody Woody July 2004 Emulators
  • InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…

    ... the Spectrum.

    The timings for IM 0 depend on ...
    Philip Kendall Philip Kendall July 2004 Development
  • ScanlinesHere's an excerpt from the FAQ: [quote] Now for the timings of each line itself: define a screen line to start with 256 screen pixels, then border, …

    ... /> [quote]
    Now for the timings of each line itself: define ...
    GOC GOC July 2004 Development
  • Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?

    How long does the ULA hold /INT low for on interrupt on each of the Spectrum models?
    Philip Kendall Philip Kendall February 2005 Development
  • Emulator with frame advance?Are there any emulators which preferably both play RZX files and also (and here's the odd but important bit) feature a "frame advance" button so that…

    Are there any emulators which preferably both play RZX files and also (and here's the odd but important bit) feature a "frame advance" button so that I can get exact movement timings and stuff from a game?
    Dr Derek Doctors Dr Derek Doctors July 2005 Emulators
  • NEW games for you chaps (and girls too) ;-)Okie, did some .TAP versions of NEW original games that were only released on TRDOS disk format. Some of you might have seen some (one or two are eve…

    ... /> Mario Islands demo: (use Pentagon timings, otherwise scrolling sux)
    [url ...
    Tom-Cat Tom-Cat January 2007 Games
  • 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…

    ... have hardware to check right timings I can only ask if ... someone could check timings of IO machine cycle during ...
    brian-82 brian-82 February 2007 Development
  • Fuse 0.8.0.1 releasedI have just uploaded version 0.8.0.1 of the [url=http://fuse-emulator.sourceforge.net/]Free Unix Spectrum Emulator[/url] to SourceForge and WoS, wher…

    ... features:

    * Fix IN timings and floating bus behaviour.
    Philip Kendall Philip Kendall May 2007 Emulators
  • 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…

    ...
    [list]
    [*] Fix IN timings and floating bus behaviour.
    Fred Fred May 2007 Emulators
  • Compatible SpectrumsFollowing some recent coding exploits I've been thinking about compatibility of various models of ZX Spectrum. Yes, it's a common question on the for…

    ... the issue of different contention timings to the "original" models. It ...
    icabod icabod October 2007 Hardware
  • ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…

    ... a question, does anyone observed timings of RAS and CAS generated ...
    brian-82 brian-82 November 2007 Development
  • Questions about the Speccy and it's emulationOut of interest, and to raise another interesting discussion, I have some questions about the Spectrum and it's emulation; 1) Is everything known ab…

    ... )? Are all of the correct timings, all of the effects of ...
    ewgf ewgf September 2008 Emulators
  • Fuse for Mac OS X 0.10.0 ReleasedA new version of Fuse for Mac OS X has been released at the dedicated sourceforge project and shortly here on WoS: [url]http://sourceforge.net/proje…

    ... (Philip Kendall).
    [*] New late timings option to emulate machines with ... 1 tstate later timings (Philip Kendall).
    [*] Reading from ...
    Fred Fred December 2008 Emulators
  • ANN: ZX Spectrum +2g ROM setI'm working on another modified ZX Spectrum. This one is based on the +2A. There's quite a lot of work to do on the hardware but the ROM set is prett…

    ... 128 debugged mode (better PLAY timings for MIDI)

    If ...
    chev chev June 2009 Hardware
  • Questions on PC distribution of ZX software...Im looking at ways to distribute ZX software (TAP,SNA,Z80,etc) to friends who don't have an emulator, or who aren't technically savay enough to downl…

    ... too for its ultra accurate timings, but that emulator seems to ...
    kgmcneil kgmcneil September 2009 Emulators
  • Framerate of arcade gamesThe Golden Age of video games coincided with the birth of 8-bit home computing; this is why every computer of that era has a slew of really bad Pacma…

    ... power pill.

    The timings are readily observed by frame ...
    ajmoss ajmoss November 2009 Games
  • 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 …

    ... and flags
    - Accurate execution timings
    - MEMPTR internal register emulation ...
    jpablo jpablo March 2010 Emulators
  • VCF report and photosNot sure where to put this, exactly...but here it is, what went on at the Vintage Computing Festival at Bletchley Park last weekend. Finally I've fo…

    ... the 48K ULA - all the timings and other effects of the ...
    Winston Winston June 2010 Sinclair Miscellaneous
  • Games you can walk through...In the thread: [URL]http://www.worldofspectrum.org/forums/showthread.php?t=30506&page=2[/URL] the topic drifts onto games such as Airwulf or Roboco…

    ... the caverns and the enemies' timings off by heart, but I ...
    ewgf ewgf August 2010 Games
  • Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…

    ... bank pageable) and the contention timings on port 0x7FFD are giving ...
    ajmoss ajmoss August 2010 Hardware
<1234567…34>

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Related Threads

  • Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?
  • LDIR timings in contended RAM?The 48K Spectrum technical reference page ([URL="http://www.worldofspectrum.org/faq/reference/48kreference.htm"]here[/URL]) describes the detailed ti…
  • 4116 SRAM replacement (and ULA timings).As mentioned in another thread, I have spent quite a lot of time experimenting with different circuits and components for using a static RAM IC to re…
  • Tapper - standard ROM timings loader version?I've had at least two copies of Tapper over the years but the most recent one I acquired seems to be a previously unknown(?) variant that uses a stan…
  • Timex contended memory timings, the TS2068 kludge board and EXROM at $4000 - $7FFFI haven't seen this documented anywhere yet so I thought I'd share my findings. I've been investigating contended memory timings on the Timex Sinclai…
  • ZX Spectrum 48 late model - inconsistent timingsI found very strange thing with INT length on different emulators.<br /> Just try to select Spectrum 48 late model and try to run the test minfo writ…
  • Test of screen switching timings.I modified the btime.tap test by Jan Bobrowski to explore the timing of screen switching. The new test, ptime-128, produces different results on diff…
  • Fuse/SPIN vs Spectaculator border timingsHello,<br /> <br /> 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 wr…

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