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<1234567…34>
  • 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…

    ... due to differences in the frame timings. Both Cobra and Arkanoid run ...
    Philip Kendall Philip Kendall April 2006 Hardware
  • How to speed up TZX loading (emu development)With many newer emulators there are options to do faster loading schemes, even for turbo-loader or protected loader blocks in TZX files. For example,…

    ... have elapsed, to ensure adequate frame timings, you're going to slow ... routine down as end-of-frame housekeeping is executed (updating the ...
    Dunny Dunny May 2006 Emulators
  • How to speed up TZX loading (emu development)With many newer emulators there are options to do faster loading schemes, even for turbo-loader or protected loader blocks in TZX files. For example,…

    ... have elapsed, to ensure adequate frame timings, you're going to slow ... routine down as end-of-frame housekeeping is executed (updating the ...
    Laser Laser May 2006 Emulators
  • EmuzWinHi folks I'm using EmuZWin and it's started running games super quick (not all games but some) I've tried messing around with speed settings but eve…

    ... perfectly accurately but with late timings, or it could be that ... ?t=40068]running with early frame timings but has one or more ... be that it has incorrect frame timings, but the z80 core is ... to test for early/late timings.

    [QUOTE]However this ...
    ccowley ccowley September 2012 Emulators
  • Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …

    ... that Pentagon has different video frame timings than ZX.
    Here is ...
    kpuchatek kpuchatek October 2012 Hardware
  • Converting PAL +2b to NTSC[B]Hello my fellow WoS'ers[/B] I have a strange request for your knowledge and advice. A chap in the US would like to use a Spectrum +2B, however w…

    ... the other hand, line and frame timings are already much less tight ... recognise 625 and 525 line timings as two different modes, or ...
    rga24 rga24 July 2013 Hardware
  • Converting PAL +2b to NTSC[B]Hello my fellow WoS'ers[/B] I have a strange request for your knowledge and advice. A chap in the US would like to use a Spectrum +2B, however w…

    ... /50 and 525/60 line/frame timings, PAL and NTSC colour encoding ... is 525/60 line and frame timing with PAL colour encoding ... is 525/60 line and frame timing with NTSC colour encoding ... is 625/50 line and frame timing with NTSC colour encoding ...
    rga24 rga24 July 2013 Hardware
  • SCF/CCF flags - new discoveryI can't believe that no one is interested in discussing the additional, previously undocumented internal state of the Z80 CPU I have discovered recen…

    ... formats that don't handle frame timings and therefore [I]can't ...
    zub zub April 2014 Emulators
  • 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
  • 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…

    ... do this for every display frame, otherwise the errant pixels would ... only suppose that memory access timings for the 5C112E are slightly ...
    Zorn Zorn February 2012 Hardware
  • 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 ... 'm not too bothered by frame rates). Did the Spectrum ever ...
    ewgf ewgf September 2008 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…

    ... br />
    The timings are readily observed by frame-stepping in MAME ... one pixel per frame, but pauses for one frame whenever he eats ... and spare lives. The screen frame rate is 60.6061Hz, ... the recent discussion here about frame rates in Spectrum games. A ...
    ajmoss ajmoss November 2009 Games
  • 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
  • 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] 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…

    ... /> Emulation of the contended memory timings.
    Pixel to pixel accuracy ... overscan, from a complete PAL frame to a borderless emulation.
    jcgamestoy jcgamestoy September 2015 Emulators
  • is there a wire frame version of total eclipse, 3d construction kit, etc?is there a wire frame version of total eclipse, 3d construction kit, etc? this would mean the game would run faster. total eclipse, etc is too slow.

    is there a wire frame version of total eclipse, 3d construction kit, etc? this would mean the game would run faster. total eclipse, etc is too slow.
    digital digital September 2015 Development
  • Digital photo frameDIY project idea: Huge and cheap digital photo frame to see only Spectrum screens. How much would it cost?

    DIY project idea:
    Huge and cheap digital photo frame to see only Spectrum screens. How much would it cost?
    hikoki hikoki December 2015 Hardware
  • SpecBAS 0.900 ReleasedAgainst my better judgement, here's 0.900. It's got lots and lots new, but mostly the new shiny is the editor. You can indent your code, you can e…

    ... really smooth graphics, at any frame rate
    The ? symbol can ... to mess with screen update timings
    Menu selection info (LASTM ...
    Dunny Dunny April 2017 Sinclair Basic
  • No-tearing (“vsync”) Full Screen FadeSeeing as most screen fades exhibit visible tearing, I wrote my own routine which does away with that problem. Simple, effective, short, and fully re…

    ... /> halt ;wait for beginning of frame
    ld de,$262 ;0x262 ... for
    or e ;different timings of different machines
    jr ...
    Ast_A_Moore Ast_A_Moore December 2017 Development
  • TZX compatibility issuesI seem to have a problem with using TZX files on different emulators. Specifically, files Saved As TZX from emulator. I better explain: I have a fe…

    ... inaccurate for preservation of real timings.
    [/quote]

    ... an extra 1000 cycles per frame.

    Take a ... different clones to achieve precise timings per model.

    ... *based* on 48K machine cycle timings.

    Well, that ...
    Woody Woody May 2003 Emulators
  • Better on an Emulator?!With the power of current PCs we can have our old spectrum running x2 x20 x100 it's original speed. There must be some games that benefit greatly f…

    ... (or TSTates) to pass per frame.

    A lot of ... their timings rely on a specific number of TStates per frame in ...
    Dunny Dunny January 2004 Games
  • Does ScanLine[0] have a left border?My emulator couldn't handle Cobra or ShortCircuit so I added some rough port FF values. I now want to make it a bit more accurate. The FAQ gives me a…

    ... the screen in the next frame. What your display device chooses ... the "base point" for the timings in the FAQ is taken ... the Pentagon's significantly different timings with respect to this).
    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…

    ... "frame advance" button so that I can get exact movement timings and ... shortcut) to run until next frame. Seems Spectaculator has similar command ...
    Vladimir Kladov Vladimir Kladov August 2005 Emulators
  • Determining 50hz/60hz in softwareHow can you determine in software if you are running at 50hz or 60hz?

    ... 2 half-frame it will give correct value. May calculate timings by ...
    piters piters March 2006 Development
  • Features that emulators don't haveI believe most of us use more than one emulator, mainly because there isn't one emulator that has all the features we need or want to use. We also kn…

    ... QUOTE=TrueVideo;177445]how about frame-by-frame execution without actually breaking ... emulator runs one single frame at each keypress.[/QUOTE]< ... Pause advances by a single frame and stays paused. Useful ... that too, though documented timings might not be what it ...
    obo obo March 2007 Emulators
  • Making your own joystick interfaceJust spied the diagram for the kempston joystick interface in the docs section. For someone who has only made up cables, what is involved in constru…

    ... a proper addressable frame buffer with microprocessor compatible timings - LCD controllers all ...
    Winston Winston June 2007 Hardware
  • Emulation vs SpecApologies if this is an old thread, what does anyone think is the best - playing spectrum games through emulation or on a real speccy? I feel it's b…

    ... attempt to get correct instruction timings, deal with the R-register ... update the entire screen every frame, it instead 'trapped' the most ...
    Digital Prawn Digital Prawn August 2007 Games
  • He's back......and he's got a new trick! AY Chip here. I've been away far too long. I would like to announce 'HatStand': for no adequately explored reason, I h…

    ... with the Interrupt. At every frame (1/50 s), there's ... need to know about IM1 - timings, addresses, etc. However, you're ...
    Winston Winston September 2007 Chit chat
  • 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…

    ... FAQ documents where in a frame the groups of 6 consecutive ... agree, the Wiki byte-fetch timings are real and correct.
    csmith csmith September 2007 Emulators
<1234567…34>

Latest Posts

  • European Software Titles with an English version
    harriusherbartio on 12:06PM
  • How Do You Categorize Your Speccy Software and Games?
    harriusherbartio on 11:21AM
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
    harriusherbartio on April 21
  • +3 Disk drive motor
    AndyC on April 21

HitBox

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frame 4.2K 6.4K
timings 1.5K 1.9K

Related Threads

  • Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?
  • 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…
  • 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…
  • Main Frame by ImageworksIs this game the same one as this one:<br /> <br /> [url]http://www.lemon64.com/?game_id=1472[/url]<br /> <br /> If so, the game was then also releas…
  • 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…
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  • is there a wire frame version of total eclipse, 3d construction kit, etc?is there a wire frame version of total eclipse, 3d construction kit, etc? this would mean the game would run faster. total eclipse, etc is too slow.
  • Digital photo frameDIY project idea:<br /> Huge and cheap digital photo frame to see only Spectrum screens. How much would it cost?

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