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<1234567…34>
  • refresh rate 60hz ??X128 is the best ZXSpectrum simulator of all... ...but have a problem: refresh rate is poor = 60hz... I have a Samsung 950p & Gforce256DDR and both i…

    ... ...
    ...but have a problem: refresh rate is poor = 60hz...
    Alberto Alberto March 2001 Emulators
  • 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…

    ... br />
    Refresh...
    A refresh is each cycle when ... s why Zilog introduced refresh cycle in Z80 as ... is not random!!!
    The refresh period is: [B]64us ... which is a maximal refresh period value.
    ... are no any additional refresh cycles (or there is ...
    brian-82 brian-82 November 2007 Development
  • La di da di daLa di da di dah di do

    La di da di dah di do
    swordheart swordheart June 2009 Chit chat
  • BEEPER music compo 10-11 July on Di:Halt partyoh yeah! public pressure organizers [B]Di:Halt [/B]which will take place [B]July 10-11[/B], agreed to hold the [B]beeper music compo[/B]. The rules…

    ... yeah! public pressure organizers [B]Di:Halt [/B]which will take ...
    newart newart July 2010 Announcements
  • 4164 refreshHi, I remember pondering the mystery of how 4164's seem to get properly refreshed when used as video memory, and half the answer has just popped up i…

    ... a 128 (7 bit) Cycle refresh and one needing a 256 ... (8 bit) cycle refresh.
    It seems most 4164 ... that would successfully refresh a 4116 would successfully refresh most varieties of ...
    spodula spodula October 2011 Hardware
  • A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…

    ... *24*3];


    // Refresh the whole screen
    void ...
    Timmy Timmy January 2012 Development
  • Question about 48K DRAM refreshHi guys. Can anybody tell me how the 48K spectrum refreshes the upper ram. RAS only? CAS before RAS? I've got a bunch of 41256 DRAM that i would lik…

    ... Spectrum uses a 128 cycle refresh.
    Now 41256's are ... they need a 256 cycle refresh if you want to use ...
    Rorschak Rorschak October 2013 Hardware
  • Emulator refresh ratesOkay, I'm going to ask a really lame, beginner question ;) Zx Spectrum refreshes screen 50 times per second. I'm running emulator on PC which says …

    ... happen so what? Do they refresh screen only during some PC ... ? That would mean that screen refresh sometimes take 1 PC frame ...
    Ralf Ralf February 2015 Emulators
  • Avviso per gli appassionati di Spectrum italiani - An announcement for all Italian Spectrum fans[b]AVVISO PER GLI APPASSIONATI DI SPECTRUM ITALIANI[/b] Sono stato contattato dal dott. David Levy, uno dei fondatori della Retro Computers Ltd - …

    [b]AVVISO PER GLI APPASSIONATI DI SPECTRUM ITALIANI[/b]
    ... L'intento è quello di realizzare una vetrina telematica ... />
    - nuovi programmi di ogni genere: giochi, utilità (anche ... ecc.;
    - sviluppo di cloni o di hardware aggiuntivo;
    - ...
    Alessandro Grussu Alessandro Grussu August 2015 Sinclair Miscellaneous
  • Which Emulator has a menu option to enable Interrupts (EI) if emulated Speccy hangs after DI / HALT?Which Emulator has a menu option / debugger option to enable Interrupts (EI) if emulated Speccy hangs after DI / HALT? I tried SpecEmu and Fuse, b…

    Which Emulator has a menu option / debugger option to enable Interrupts (EI) if emulated Speccy hangs after DI / HALT?

    I tried SpecEmu and Fuse, but I can not find a option for doing this in their debugger.
    Luzie Luzie June 2021 Emulators
  • Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …

    ... screen in less than one refresh, is it possible?

    LD (HL),C

    DI
    LD A,0FEH
    DEFB 0
    MAINLOOP:
    DI
    PUSH AF
    PUSH ...
    robpearmain robpearmain September 2004 Development
  • Atic Atac speed.Dear all, Excuse the noob question, but does anyone know how fast Atic Atac runs at? What I mean is, frames per second, or the amount of pixels the…

    ... , it is designed to provide Refresh information to the on board ... .g.

    [code]
    DI
    LD A, 10
    refresh and your screen slowly filling ...
    BloodBaz BloodBaz January 2009 Games
  • DivIDE on Spectrum +3Hi all, Is it possible to use the DivIDE on the Spectrum +3 in 128K mode? I have the 'A' jumper set on the board, but my +3 resets into 48K mode wit…

    ... correct value:

    TEST DI
    LD A,xxxxxxx0
    LD (8189),A ;refresh memory backup
    LD A ...
    velesoft velesoft February 2009 Hardware
  • +3 dead(!)Hi, When I turn on my +3 I see only white and black strips (vertical) on screen any idea on how to fix it? Thank you in advance Chris [IMG]http:…

    ... the ROM has executed a DI, then a HALT instruction, so ... M1 cycles to allow DRAM refresh while the CPU is halted ...
    mcleod_ideafix mcleod_ideafix September 2009 Hardware
  • Arkos TrackerHi all, I'm proud to present you my Windows-based Tracker : Arkos Tracker, for you to compose for Spectrum, CPC and MSX. It requires .NET 3.5 at lea…

    ... />
    ; *** Initialization ***********************************************************
    MAIN_PROGRAM
    di

    ; Setup the vectorized ...

    main_loop
    ; wait refresh
    halt

    ; Wait ...
    SyX SyX June 2010 Development
  • Programming flash eprom on DIVIDE+Can you test it on DIVIDE PLUS ? [url]http://velesoft.speccy.cz/other/flasher-divide-plus.zip[/url] (This flash utility is WINSTON's flasher for dia…

    ... code:
    ORG 32000
    DI
    LD A,26 ;number ... each system can erase and refresh this memory if need.
    velesoft velesoft November 2010 Hardware
  • RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…

    ...

    Main proc
    di
    ld hl,65536-256 ... is reseted periodically, so the refresh cycle is only performed on ... 't use only the refresh bus cycle to refresh non contended memory ...
    mcleod_ideafix mcleod_ideafix May 2011 Emulators
  • ZX80 and 81 hardware questionsI'm finding a lot of the documentation that is ostensibly about the hardware of the ZX80 and 81 to be primarily about the software. I was hoping some…

    ... RAM posts due to the refresh. It also seems to ... serves as part of the refresh cycle will be loaded to ... on a ZX80:

    DI
    .label JR label
    refresh address, meaning that it usurps ... on bit 6 of the refresh address, and NMI is ...
    Thommy Thommy September 2011 Hardware
  • Disable interrupts?Well, I've read the bits from the David Webb book about interrupt modes and (vaguely) appreciate the principles behind having a vector table, after r…

    ... using a single EI or DI instruction :)

    So yes ... when the screen begins to refresh. It's often handy to ...
    Ralf Ralf February 2012 Development
  • A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…

    ... *24*3];


    // Refresh the whole screen
    void ...
    AndyOaks AndyOaks March 2012 Development
  • 64x48 full colour graphicsHow feasible is this? Could an interrupt-driven routine be used to, for example, fill the top two thirds with a 64x32 blocky picture and leave the bo…

    ... /> M1
    ;set interrupt
    DI

    LD A,24 ...

    ;end of screen refresh
    M7
    LD HL ...
    Ralf Ralf July 2012 Development
  • 64x48 full colour graphicsHow feasible is this? Could an interrupt-driven routine be used to, for example, fill the top two thirds with a 64x32 blocky picture and leave the bo…

    ... /> M1
    ;set interrupt
    DI

    LD A,24 ...

    ;end of screen refresh
    M7
    LD HL ...
    Ralf Ralf July 2012 Development
  • ZX Spectrum CartridgesI have been thinking of "cloning" ZX Cartridges for a while (case, board and silicon skirt), to be able to make new releases or replace damaged cartr…

    ... /> LD H,A
    DI
    LD I, A -=& ... allows cartridge logic to check refresh address, immediately followed by ... register might wrack your memory refresh operation and crash ZX. ... instead of checked)
    2 - Refresh address being something like 00000000 ...
    RMartins RMartins June 2016 Hardware
  • A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…

    ... *24*3];


    // Refresh the whole screen

    Alcoholics Anonymous Alcoholics Anonymous June 2016 Development
  • What in the hell does...(UL), (AL), (S3) (DI), (DL), (PW), etc. mean? I found these in the games list, and have no idea about the meaning. Thanks in advance

    (UL), (AL), (S3) (DI), (DL), (PW), etc. mean? I found these in the games list, and have no idea about the meaning.
    Thanks in advance
    Anonymous Anonymous November 2001 Games
  • 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 …

    ... load at all
    Myla Di'Kaich.csw - No speedloading
    Dunny Dunny May 2002 Emulators
  • Short Z80 QuizQ1) Which program gives different result ? A) XOR A ADD A,A B) XOR A ADC A,A C) SCF ADD A,A D) SCF ADC A,A Q2) What is the equivalent of NEG …

    ... on your Spectrum ?

    DI
    HALT
    EI
    Dr BEEP Dr BEEP July 2002 Games
  • Load'n'Run per gli Spectrumisti Italiani.Se non sbaglio stavate cercando o provando a ridurre in file adeguati i vecchi nastri di Load'n'Run ecc., ma , tirate un sospiro di sollievo, qualcun…

    ... file adeguati i vecchi nastri di Load'n'Run ecc., ma ... , tirate un sospiro di sollievo, qualcuno ha gi? fatto ...
    WhenIWasCruel WhenIWasCruel October 2002 Games
<1234567…34>

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    harriusherbartio on 11:21AM
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
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    Renegade on April 21
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    harriusherbartio on April 21

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  • ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone.<br /> <br /> I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where …
  • BEEPER music compo 10-11 July on Di:Halt partyoh yeah! public pressure organizers [B]Di:Halt [/B]which will take place [B]July 10-11[/B], agreed to hold the [B]beeper music compo[/B]. <br /> <br …
  • Results of Di:HALT (music/graphic/demo)Official Online<br /> Place Score Place Score<br /> <br /> <br /> [ ZX Spectrum AY/YM TurboAY Music ]<br /> <br /> 1 6.30 2…
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