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<1234567…34>
  • Interrupts details questionSuppose I am writing a game and I want to use interrupts to measure time, draw the screen without flicker, maybe to poll keyboard etc. What kinds of …

    ... and I want to use interrupts to measure time, draw the ... , maybe to poll keyboard etc. What kinds of interrupts are there?
    interrupts vs NMI. Are those generated ...
    Erlstoned Erlstoned August 2004 Development
  • How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…

    ... a little confused regarding the interrupts on the Spectrum. If I ... /> I suspect that the interrupts does for example keyboard scanning, but is ...
    Rickard Rickard May 2007 Development
  • Odd keyboard behaviour due to a single bit failure in +3 ROMI've just fixed a spanish +3, which, among normal issues (drive belt missing), presented a very strange one: the keyboard autorrepeated without a del…

    ... failure, which generated too many interrupts, but a fast test: ...
    I tried another keyboard, with the same result. Definetly ... br /> No ULA issues, no keyboard membrane/matrix issues, no single ... while executing the standard keyboard routine? It doesn't ...
    mcleod_ideafix mcleod_ideafix December 2009 Hardware
  • Off topic: Fix/replace ZX81 keyboard?I know this is slightly off topic since this is a Spectrum forum, but here goes: The keyboard membrane for my old ZX81 is broken. The part of the me…

    ... here goes:

    The keyboard membrane for my old ZX81 ... , severing all connections between the keyboard and the computer. I was ...
    Anonymous Anonymous January 2002 Sinclair Miscellaneous
  • Spectrum keyboard layout?OK, this is probably a silly question, but here goes: Among all the wonderful resources on here, I have not been able to find something as simple as …

    ... picture of the 48K Spectrum keyboard layout. I'm planning to ...
    OleM OleM July 2001 Sinclair Miscellaneous
  • Keyboard fontCan anyone tell me what font was used for the printing on the ZX Spectrum keyboard?

    Can anyone tell me what font was used for the printing on the ZX Spectrum keyboard?
    Rex Rex April 2001 Sinclair Miscellaneous
  • 48k / 48k+ Keyboard MembranesCan anyone out there help me to locate a set of new keyboard membranes for my Speccy 48k (rubber keys) and 48k+ . I've just dusted them off after ye…

    Can anyone out there help me to locate a set of new keyboard membranes for my Speccy 48k (rubber keys) and 48k+ .
    I've just dusted them off after years in storage and the membranes on both machines have had it !

    Many thanks in advance .
    Dean Lowery Dean Lowery March 2001 Sinclair Miscellaneous
  • Faulty Keyboard membraneHello, My keyboard membrane of the 48K doesn'nt work anymore, Does anybody know how to get a new one ? Thanks, Eelko.

    Hello,

    My keyboard membrane of the 48K doesn'nt work anymore,
    Does anybody know how to get a new one ?

    Thanks,

    Eelko.
    [-HIVE-] [-HIVE-] August 2001 Sales
  • Keyboard controlsAn idea occured to me when reading thread on Ultimate. What is your favourite keyboard controls layout? For me: O=left P=right Q=up A=dow…

    ... Ultimate. What is your favourite keyboard controls layout?
    For me ...
    Dynamite Dan Dynamite Dan April 2002 Games
  • Extension for 128k + 3 keyboardHi everyone. Im working to put the plus 3 inside a pc at tower and already replaced its psu for a pc at one and its 3" drive for a 3.5" one. Im worki…

    ... " one. Im working on the keyboard, soldering some wires from the ... so i can extend the keyboard for about 1 meter from ...
    aqua aqua February 2003 Sinclair Miscellaneous
  • Keyboard MembraneHi all I'm about to finally replace the dead keyboard membrane in my 48K Speccy. Is there any preventative stuff I can do to improve the life of the…

    ... to finally replace the dead keyboard membrane in my 48K Speccy ...
    Kev Kev March 2003 Sinclair Miscellaneous
  • Decent Keyboard?Does anyone know if any manufacturer ever produced a decent, typewriter-style keyboard compatible with the original Speccy 128k (with '+' keyboard), …

    ... produced a decent, typewriter-style keyboard compatible with the original Speccy ... 128k (with '+' keyboard), preferably not the type where ...
    TygerBC TygerBC May 2003 Games
  • A PC keyboard on a Spectrum ???Hi. I'd like to know : is it possible to connect a "modern keyboard" (for example a PC keyboard) to a Spectrum, after modifing its connectors/cables …

    Hi.
    I'd like to know : is it possible to connect a "modern keyboard" (for example a PC keyboard) to a Spectrum, after modifing its connectors/cables ?
    Seriously

    [ This Message was edited by: Cimbalo on 2003-06-04 23:06 ]
    Cimbalo Cimbalo June 2003 Sinclair Miscellaneous
  • Use Spectrum as keyboard for PCAnyone ever converted a spectrum keyboard for use on a PC? I think it would be retro cool to have a Speccy on my desk at work rather than a PC keyboa…

    Anyone ever converted a spectrum keyboard
    for use on a PC?
    I think it would be retro cool to have a Speccy on my desk at work rather than a PC keyboard! :)
    mlasham mlasham June 2003 Sinclair Miscellaneous
  • NEW INTERFACE FOR ZX SPECTRUM!!Hi all zx-maniax! Here is a letter from Polish inventor, Yarek Adamski. He constructed a new brilliant interface for ZX SPECTRUM. Ready carrefuly i…

    ... .ZXINPUT - gives possiblility to connect keyboard
    and mouse of PC ... Mouse).
    Also can generate interrupts on every screen line as ...
    Yerz Yerz July 2003 Sinclair Miscellaneous
  • ZX80 in full Keyboard - worth restoring?Hi I just bought a ZX80 but it is in a full size mechanical keyboard, complete with a Maplin zx81 sound card, and two other interface cards. It came …

    ... a full size
    mechanical keyboard, complete with a Maplin
    board is intact with keyboard,but they've wired
    the full size keyboard to the resistors on the ...
    mlasham mlasham July 2003 Sinclair Miscellaneous
  • TC 2068 key set and keyboard panel wanted. Hello all. I am looking for both a set of gray keys for the TC 2068 portuguese computer, and a black plastic (?) cover panel for the keyboard (the…

    Hello all. I am looking for both a set of gray keys for the TC 2068 portuguese computer, and a black plastic (?) cover panel for the keyboard (the one that glues on top of the machine). All in a good shape, please.


    Thanks,
    Pedro
    pmsr pmsr July 2003 Wanted
  • Sync-buzzer, interrupts and general confusionBeen wittering on about this in the Misc group, but thought it was best discussed here. Basically been trying to recreate the Sid-Sound effect from A…

    ... a good tutorial on using interrupts? As soon as someone mentions ...
    b00mzi11a b00mzi11a September 2003 Development
  • Windows CE - Emulator, keyboard troublesHi, anyone knows, why the "o"-key (the character "o") does not work an the HP Jornada 680 (Win CE 2.11 with german keyboard) with Spectrum Emulator …

    Hi,

    anyone knows, why the "o"-key (the character "o") does not work an the HP Jornada 680 (Win CE 2.11 with german keyboard) with Spectrum Emulator 1.1 by Palmtop BV? And where is the Symbol-Shift-key???

    Frank
    51pegasi 51pegasi December 2003 Emulators
  • Typeface on 48k keyboardDoes anyone know which typeface was used for the letters on the 48k (rubber) keyboard? Cheers, Jon.

    Does anyone know which typeface was used for the letters on the 48k (rubber) keyboard?

    Cheers,

    Jon.
    Jon Needle Jon Needle January 2004 Sinclair Miscellaneous
  • *New steel keyboard back plate for 48k+ and 128k+Hi, As you may recall(a few posts back), I did a sort of modification of the original keyboard backplate. I found a company that made a few for me fr…

    ... of modification of the original keyboard backplate.
    I found a ...
    thomas3120 thomas3120 February 2004 Sales
  • keyboard support on Spectaculator 6.XDear Johnathan, your emulator is fascinating, but, to be honest, a better keyboard support on non-english keyboards would be great. The major proble…

    ... , to be honest, a better keyboard support on non-english keyboards ... , semicolon keys of the PC keyboard result in different results. I ...
    Seejay Seejay July 2004 Emulators
  • Cheapest keyboard sourceWhere I can buy replacement keyboard foil for my ZX 48k?

    Where I can buy replacement keyboard foil for my ZX 48k?
    klingler klingler July 2004 Wanted
  • Broken keyboard?Maybe long time ago discovered (o; Just found that if the keyboard isn't working anymore but the key foil itself is intact you need to cut of the 5 …

    ... /> Just found that if the keyboard isn't working anymore but ...
    klingler klingler July 2004 Sinclair Miscellaneous
  • IM 2 interrupts and smooth scrolling - easy peasy!Okay, been fiddling around with IM 2 and have actually mastered (I think) how to use IM 2! Now I run my game Ragnar Revival in IM2 and use HALT to sy…

    ... 1 and enable
    ei ;interrupts. Jump to 0056 in ROM ...
    ekoman ekoman July 2004 Development
  • InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…

    ... 3.54 MHz, so interrupts are still generated every ... interrupt routines; see the retriggered interrupts section below.

    interrupts were enabled beforehand.
    ... 'nnnn'.

    Retriggered interrupts

    If you ...
    Philip Kendall Philip Kendall July 2004 Development
  • SAGA 1 Emperor KeyboardI have a SAGA Emperor replacement keyboard gathering dust in the attic, and was thinking of auctioning it on Ebay, but don't know what it's worth. Sh…

    I have a SAGA Emperor replacement keyboard gathering dust in the attic, and was thinking of auctioning it on Ebay, but don't know what it's worth. Should I put a reserve on it? I haven't seen any on Ebay to use as a guide.

    Derek
    dmsmith dmsmith August 2004 Sinclair Miscellaneous
  • Reading the keyboardDoes anyone have a code sample to read the keyboard in machine code ?

    Does anyone have a code sample to read the keyboard in machine code ?
    Mr Millside Mr Millside November 2004 Development
  • Sam Coupe Keyboard Has any one got a broken Sam or a sam keyboard they are willing to sell to me? thanks, Steve(spt)

    Has any one got a broken Sam or a sam keyboard they are willing to sell to me?

    thanks, Steve(spt)
    Steve(spt) Steve(spt) November 2004 Wanted
  • The Rubber Keyboard Muffler.One of those long forgotten memories arose from my mind the other day. The great invention of the Rubber Keyboard Muffler aka the pillow. Let me e…

    ... great invention of the Rubber Keyboard Muffler aka the pillow.
    GeeKay GeeKay April 2005 Sinclair Miscellaneous
<1234567…34>

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  • KEYBOARD PROBLEMHI, MOST OF THE KEYS ON MY SPECTRUM + 48K WONT WORK, I`VE HAD IT FOR YEARS AND WAS WONDERING DO I NEED A NEW MEMBRANE OR IS IT SOMETHING ELSE? THE DI…
  • Off topic: Fix/replace ZX81 keyboard?I know this is slightly off topic since this is a Spectrum forum, but here goes:<br /> <br /> The keyboard membrane for my old ZX81 is broken. The pa…
  • Spectrum keyboard layout?OK, this is probably a silly question, but here goes: Among all the wonderful resources on here, I have not been able to find something as simple as …
  • Keyboard fontCan anyone tell me what font was used for the printing on the ZX Spectrum keyboard?
  • 48k / 48k+ Keyboard MembranesCan anyone out there help me to locate a set of new keyboard membranes for my Speccy 48k (rubber keys) and 48k+ . <br /> I've just dusted them off af…
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