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<1234567…34>
  • Wanted: Code to wait until Border has been drawnWhen my IM2 interrupt fires, I want to wait until the ULA is past the first line of display before drawing. I know I need to wait about 14300T after…

    When my IM2 interrupt fires, I want to wait until the ULA is past the first line of display before drawing.

    I know I need to wait about 14300T after interrupt but how can I tell if the ULA is now past the border and onto the screen?
    robpearmain robpearmain September 2004 Development
  • The long waitNot only did we have to wait on our games loading, but had to wait yonks on the mail orders. Thats the thing that really drove my patience. Please …

    ... only did we have to wait on our games loading, but ... had to wait yonks on the mail orders ...
    GeeKay GeeKay October 2004 Games
  • Harlequin ZX Spectrum Clone now 100% compatible!Hi all! The Harlequin ZX Spectrum clone now shows full timing compatibility with the ZX Spectrum! 8-) Both the ULA IO and memory contentions are fa…

    Hi all!
    The Harlequin ZX Spectrum clone now shows ...
    csmith csmith July 2007 Hardware
  • Some ever noticed that +2A/+3 halts Z80 using WAIT?I mean: Anyone ever noticed that the +2A/+3 halts the Z80 using WAIT? All documentation I've read about contention state that the ULA halts the Z80 …

    ... /+3 halts the Z80 using WAIT?

    All documentation I ... of the scope showing the WAIT signal activity. The Spectrum was ... comprises a period of no wait (WAIT signal is high), followed by ... bit longer period with high wait activity. Of course, the first ...
    mcleod_ideafix mcleod_ideafix October 2009 Hardware
  • rebuilding a speccy - original hardware, emulation or cloneI have some spare speccy parts and cases etc and I've been thinking of bastardising a spectrum. I'm undecided as to using original hardware, clone or…

    ... /> my other thought is I wait for harlequin to be finished? or ...
    BiNMaN BiNMaN October 2009 Hardware
  • Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…

    ... and project notes from the Harlequin... a Speccy fan in the ... designed a PCB for the Harlequin! (The Harlequin as you probably remember ... ://trastero.speccy.org/cosas/JL/Harlequin/superfo1.html[/url]

    Winston Winston January 2012 Hardware
  • Best current ide /flash interfaces? and re harlequin cloneHi I have a few 48k rubber-key spectrum's, a harlequin clone board :) on order and 1 (one) divide+ interface. I was hoping zetro's simple IDE woul…

    ... rubber-key spectrum's, a harlequin clone board :) on order and ... also fit / work on the harlequin clone? seeing as thats not ...
    iainjh iainjh February 2012 Hardware
  • BAS-ROM for HarlequinSince it is very easy for everybody to plug a new BAS-ROM into his Harlequin there is the question, what kind of ROM and what additional functions sh…

    ... new BAS-ROM into his Harlequin there is the question, what ...
    HZJ HZJ April 2014 Development
  • A tally on the number of successful builds of the Harlequin[SIZE=4][COLOR=Green][U][B]A tally on the number of successful builds of the Harlequin.[/B][/U][/COLOR][/SIZE] Please post your successes below :-) …

    ... of successful builds of the Harlequin.[/B][/U][/COLOR][/SIZE]
    1024MAK 1024MAK May 2014 Hardware
  • Harlequin - usefull mods and addsHello, I start here a thread regarding mods and adds for the Harlequin. It was found: * that the Sinclair Interface 1 does not fully work at the Ha…

    ... mods and adds for the Harlequin.

    It was found ... not fully work at the Harlequin.
    * that the Beta Disk ... ) does not work at the Harlequin.

    The reason is ... leads the -12V of the harlequin to the circuitry that needs ...
    ingo ingo May 2014 Hardware
  • populated Harlequin Rev.D -> Rev.FHi, I like to sell my Harlequin Rev. D board. I modified it to be identical to Rev. F: * switching regulator instead of linear regulator for DC in …

    ... /> I like to sell my Harlequin Rev. D board. I modified ...
    ingo ingo June 2014 Sales
  • Harlequin case label concept?Hello everyone; I have been thinking about constructing a case for my Harlequin board. Nothing too outlandish; a sheet-metal case very close to the…

    ... constructing a case for my Harlequin board. Nothing too outlandish; a ... to have a Sinclair-style Harlequin label (in raised metal or ...
    Trafferth Trafferth August 2014 Sinclair Miscellaneous
  • Possibly daft Harlequin composite question... :SHi; My Harlequin Rev. F works fine apart from one aspect: there's no composite out... :( I have checked continuity and the discrete components. I.…

    Hi;

    My Harlequin Rev. F works fine apart ...
    Trafferth Trafferth September 2014 Hardware
  • Harlequin runningHi all, Just thought I'd post a wee pic of my Harlequin kit which I received yesterday and assembled in double quick time. A great piece of hardwar…

    ... a wee pic of my Harlequin kit which I received yesterday ... .com/images/stories/IanJ/ZXspectrummod/Harlequin.JPG[/IMG]
    IanJ IanJ October 2014 Hardware
  • Keyboard for ZX Spectrum 16k/48k or HarlequinThere is a keyboard developed originally for use with the Harlequin but maybe used as well with any 16k/48k ZX Spectrum. The keyboards offer a great …

    ... originally for use with the Harlequin but maybe used as well ...
    PokeMon PokeMon October 2014 Sales
  • a harlequin keyboard option (+2a)Hi guys. Finally got around to this, I am using a keyboard from a +2a connected to my harlequin. [IMG]https://farm4.staticflickr.com/3932/1560029…

    Hi guys.

    Finally got around to this, I am using a keyboard from a +2a connected to my harlequin.

    [IMG]https://farm4.staticflickr.com/3932/15600296661_323b6eee4d_k.jpg[/IMG]
    Lost Lost October 2014 Hardware
  • Harlequin keyboards / housingsI have about 20 or maybe more ZX Spectrum 48K's, which I'm planning to sell in separate parts (refurbished boards, ULA's and cases). Now I'm interes…

    ... /> Now I'm interested if Harlequin owners want a refurbished case ...
    bverstee bverstee November 2014 Sales
  • important Harlequin modWhile searching for a better solution for avoiding undesired spikes that corrupt the screen RAM at Harlequin I found a final solution. No additional …

    ... corrupt the screen RAM at Harlequin I found a final solution ... realize these mods at every Harlequin PCB.

    Greets Ingo ...
    ingo ingo November 2014 Hardware
  • where to find Harlequin rev. F all mods till now ?Hi all :) because no more broken speccys around for now, is time to build first of my Harlequin's rev F, I looking in forums and look at Ingo posts…

    ... to build first of my Harlequin's rev F,
    I ...
    gorski gorski July 2015 Hardware
  • SuperFo Harlequin crashes on EnterHello there, I currently have a SuperFo Harlequin at hand which suffers a crash/freeze each time I try to enter a line in basic. Doesn't matter if …

    ... /> I currently have a SuperFo Harlequin at hand which suffers a ...
    Shockwav3 Shockwav3 September 2015 Hardware
  • So, where exactly can I buy a Harlequin?I've looked far and wide but cannot seem to find where to buy one of the Harlequin based "clones". Even an unpopulated motherboard would be a start.…

    ... to buy one of the Harlequin based "clones". Even an unpopulated ... an NTSC user...has the Harlequin had much success on this ...
    cbmeeks cbmeeks October 2015 Hardware
  • Superfo Harlequin Rev D Documentation wantedI have a Rev D Superfo Harlequin PCB. I would like the documentation (schematic and board layout files), but I get a [b]Not Found[/b] error when I cl…

    ... have a Rev D Superfo Harlequin PCB. I would like the ... ://trastero.speccy.org/cosas/JL/Harlequin/superfo1.html).

    Does ...
    1024MAK 1024MAK October 2015 Hardware
  • Harlequin Rev. G - error of labels at J16Hi, a German user found an error at Harlequin Rev.G board regarding the labels of J16. The labels of -5V and +12V are interchanged! That could be …

    ... user found an error at Harlequin Rev.G board regarding the ...
    ingo ingo November 2015 Hardware
  • Harlequin REV F to REV G upgradeHi guys i have a Harlequin REV F board and noticed its been updated to REV G with teh message of Error on J16 does anyone know what changes …

    ...

    i have a Harlequin REV F board and noticed ... ://trastero.speccy.org/cosas/JL/Harlequin/superfo1.html

    Thank ...
    silverfox0786 silverfox0786 November 2015 Hardware
  • Harlequin Rev. G - Composite video problem.What I'm about to describe I'm not experiencing it by myself, so the probable answer to any "have you tested this or that" question is no, I don't, b…

    ... />
    They have built their Harlequin to specs, with correct face ... much better knowledge of the harlequin electronics has formed his opinion ...
    GroovyDrifter GroovyDrifter January 2016 Hardware
  • Opus Discovery with a HarlequinHi all I am getting a Harlequin and the 128k toaster rack mod but I have an opus discovery and a spectrum +, the + is dead so going to use the cas…

    ... />
    I am getting a Harlequin and the 128k toaster rack ... use the case for the harlequin to live in but does ... the discovery 1 with the harlequin?

    Thanks
    caver99 caver99 March 2016 Hardware
  • Harlequin Rev GI have just got all the bits to build an Harlequin Rev G system and I went for a red solder mask board. I have fitted the 3 surface mount components…

    ... the bits to build an Harlequin Rev G system and I ...
    caver99 caver99 March 2016 Hardware
  • Harlequin 128k??Hi peeps... I've seen that you can do a 128k version of the Harlequin board. Is it just the standard board with different chips or is it a dif…

    Hi peeps...

    I've seen that you can do a 128k version of the Harlequin board.

    Is it just the standard board with different chips or is it a different board all together?

    Thanks
    Shugs81 Shugs81 April 2016 Hardware
  • Harlequin turbo mode ( 7 MHz )Hi, All. Sorry for my bad english. I make Harlequin mod - turbo mode ( CPU clock 7MHz ) for Harlequin. Could you be so kind to write your opin…

    ... br />
    I make Harlequin mod - turbo mode ( CPU clock ... 7MHz ) for Harlequin.
    Could you be so ... schematic.
    I tested on Harlequin 128K.

    [img ... ) is inverting CPUCLK , but Harlequin has different schematic : CLKB is ...
    tetroid tetroid May 2016 Hardware
  • Just speccy or harlequin ?Hi all, I just wondered, to fit on an original rubber key 48k spectrum, which one would you recommend ? Just speccy 128k or the harlequin 128k ? S…

    Hi all,
    I just wondered, to fit on an original rubber key 48k spectrum, which one would you recommend ?
    Just speccy 128k or the harlequin 128k ?
    Self assembly and soldering is no problem.
    Greetings
    frankje frankje December 2016 Hardware
<1234567…34>

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