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Search Again :: Adv Search 1000 results in 0.007s
<1234567…34>
  • Interface 1 ULA - what does it do and what not?I heard a rumour a few weeks ago: that the Interface 1 ULA does not control the Microdrive, but mainly the ROM and network. Many of us (like myself)…

    ... numerous transistors, there is a clock circuit, an adress decoder (74LS260), ROM ...
    bverstee bverstee June 2013 Hardware
  • Question about snapshot files....I've noticed that everytime I play "The Boss" (football management) it produces the same scores. I've played the first 5 games 3 or 4 times now and t…

    ... need do is create a clock circuit for the Spectrum!

    rwap rwap April 2007 Games
  • Spectrum 128k +2a questionOn that model what is the purpose of IC 15 ? it is a hex inverter but I cant understant its purpouse I suspect it is malfunctioning in one of my spec…

    ... -10) are used to make clock circuit (35.4690 MHz). If you ... scope, you can see the clock at pin 10 ( but don ... a perfect square signal). Like clock frequency is high, this hex ... take the 3.5 MHz clock from ULA to Z-80 ... take the 8.8 MHz clock from ULA to TEA2000 ( ...
    Jose_Leandro Jose_Leandro November 2009 Hardware
  • PlusDlite prototype/first batch is here![IMG]http://benophetinternet.nl/hobby/vanmezelf/20130605_143221.jpg[/IMG] [IMG]http://benophetinternet.nl/hobby/vanmezelf/20130605_153930.jpg[/IMG] …

    ... . no stable 8 MHz from clock circuit: replaced 33pF capacitor by another ...
    bverstee bverstee June 2013 Hardware
  • PlusDlite prototype/first batch is here![IMG]http://benophetinternet.nl/hobby/vanmezelf/20130605_143221.jpg[/IMG] [IMG]http://benophetinternet.nl/hobby/vanmezelf/20130605_153930.jpg[/IMG] …

    ... /> Or maybe something with the clock circuit.

    I have used ... that is used in the clock circuit, and 74LS126 that is used ...
    bverstee bverstee June 2013 Hardware
  • PlusDlite prototype/first batch is here![IMG]http://benophetinternet.nl/hobby/vanmezelf/20130605_143221.jpg[/IMG] [IMG]http://benophetinternet.nl/hobby/vanmezelf/20130605_153930.jpg[/IMG] …

    ... instead of 74LS00 for the clock circuit: no difference
    - tried different ... from a frient to check circuit differences (as the problem also ...
    bverstee bverstee June 2013 Hardware
  • DivMMC EnJOY!Coming up... [IMG]http://benophetinternet.nl/hobby/vanmezelf/DivMMC_enjoy_first_render.jpg[/IMG]

    Clock circuit is discussed here: [url]http://www.worldofspectrum.org/forums/showthread.php?t=44522[/url]

    And I asked Mario about the MAPRAM led.

    Thanks phoenix^ra for your reply! I hope DivIDE can be used on the DivMMC too!
    bverstee bverstee August 2013 Hardware
  • DivMMC EnJOY!Coming up... [IMG]http://benophetinternet.nl/hobby/vanmezelf/DivMMC_enjoy_first_render.jpg[/IMG]

    [QUOTE=bverstee;714884]Clock circuit is discussed here: [url]http:// ...
    velesoft velesoft August 2013 Hardware
  • DivMMC EnJOY!Coming up... [IMG]http://benophetinternet.nl/hobby/vanmezelf/DivMMC_enjoy_first_render.jpg[/IMG]

    ... assumption last week, maybe the clock circuit is ok after all.
    I'm suspecting the BC846 circuit, as the output level of ...
    bverstee bverstee August 2013 Hardware
  • DivMMC EnJOY!Coming up... [IMG]http://benophetinternet.nl/hobby/vanmezelf/DivMMC_enjoy_first_render.jpg[/IMG]

    ... had only problems with the clock circuit but I tested less spectrums ...
    Mp Mp August 2013 Hardware
  • DivMMC EnJOY!Coming up... [IMG]http://benophetinternet.nl/hobby/vanmezelf/DivMMC_enjoy_first_render.jpg[/IMG]

    ... fix needed to enhance the clock signal on the toastrack, causes ... now:
    1. Enhance the clock circuit once again - this will take ...
    bverstee bverstee September 2013 Hardware
  • DivMMC EnJOY!Coming up... [IMG]http://benophetinternet.nl/hobby/vanmezelf/DivMMC_enjoy_first_render.jpg[/IMG]

    ... fix needed to enhance the clock signal on the toastrack, causes ... now:
    1. Enhance the clock circuit once again - this will take ...
    velesoft velesoft September 2013 Hardware
  • Totally random idea for the hardware nuts to exploreWhen it comes to multi-player games, how hard would it be to generate a second display from a single Speccy, instead of trying to link up machines, s…

    ... two ULAs control the Z80 clock in order to pause it ... they be driven by a clock circuit instead of the crystal?
    Basher Basher April 2014 Hardware
  • Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…

    ... there is a CPU clock variation all CPU cycles ... compare to an external clock. But on a Spectrum ... from the ULA internal clock circuit, which in turn comes ... the ULA's internal clock and divider circuits do ... timing test, a real external clock is needed.

    1024MAK 1024MAK November 2014 Hardware
  • DivMMC Enjoy - I'm not enjoying it!My DivMMC Enjoy arrived today. Excitedly I rushed home to plug it into my +2a. I have quite a few SD card/CF solutions for my computers so I know wha…

    ... out and added the different clock circuit details this January.
    guesser guesser February 2015 Hardware
  • DivMMC Enjoy - I'm not enjoying it!My DivMMC Enjoy arrived today. Excitedly I rushed home to plug it into my +2a. I have quite a few SD card/CF solutions for my computers so I know wha…

    ... out and added the different clock circuit details this January.[/QUOTE]
    BCH BCH February 2015 Hardware
  • External Z80 CPUHi Looking for some advice if possible. Many years ago I had a plug-in board for a Spectrum 48k which had a couple of switches, a z80 CPU, and a S…

    I ended up just copying the clock circuit from an issue 2 board (simply because I had the bits to hand), using a ZTX313. Now working fine - just need to find a spectrum with a dodgy CPU to test it on in real life!
    Graham Graham September 2015 Hardware
  • zx spectrum +2A / +2B no clock signal or video display / gate array dead ?scratching my head with this sick specie .. it is a issue 4 .. i was hunting for R45 that goes between the clock signal of cpu and gate array,, but i…

    ... as I'm aware, the clock circuit is the same as shown ...
    guesser guesser November 2021 Hardware
  • ZX Spectrum Clock Signal Restorer Circuit[SIZE=5][U][B]ZX Spectrum Clock Signal Restorer Circuit[/B][/U][/SIZE] The circuit below is an experimental circuit. It has only been "tested" using…

    ... ][U][B]ZX Spectrum Clock Signal Restorer Circuit[/B][/U][/SIZE]

    The circuit below is an experimental circuit.
    It has ...
    1024MAK 1024MAK June 2014 Hardware
  • So you need to double (or triple, or quadruple) the clock speed...No particular reason for posting this, other than I was looking at an eZ80 evaluation board that does this, and that jogged my memory of a project I'…

    ... worth worrying about) and the circuit just floats.

    circuit like this, not just powers of two of the reference clock ... here is the breadboarded demonstration circuit:

    [ ... 4MHz crystal oscillator circuit which is the reference clock. (The ...
    Winston Winston June 2010 Hardware
  • Revisiting Spectrum CPU clock regenerationWarning: This post will be a bit nerdy :-) Some time ago, I experimented with phase locked loop circuits as a possible way to regenerate the Spectru…

    ... 14MHz oscillator circuit we have only the 3.5MHz clock signal at ... ! Solved! Not so fast. Your circuit won't work on anything ... common uses of this circuit is to multiply clock signals, and to ... hand border, a circuit driven by the regenerated clock will see the ...
    Winston Winston September 2012 Hardware
  • DivMMC clock bufferI have completed the first DivMMC EnJOY today: [url]http://www.worldofspectrum.org/forums/showthread.php?t=44238[/url] But there is a problem with t…

    ... with the clock boost circuit.

    Mario designed the circuit with a ... supply voltages.
    But that circuit doesn't work with either ... /> With that supply voltage, the circuit does it's job on ... have both made a similar circuit.
    Ingo for the ...
    bverstee bverstee July 2013 Hardware
  • ZX Spectrum clock signals comparedI haven't searched for this on WoS; it might have been posted before. But I think it's important info, and can't do any harm to repeat or show from a…

    ... problems with the ZX Spectrum clock signal.
    With the ... this testing I tried another clock inverter solution from Ingo ... adding the 74HC04 circuit, the output of that circuit is worth nothing ...
    This gives a perfect clock signal by default:

    bverstee bverstee September 2013 Hardware
  • SpeccyBob circuit diagramsI've had quite a few requests for this lately, so I've decided to put the circuit diagrams for speccybob on my site in their original Protel format: …

    ... 've decided to put the circuit diagrams for speccybob on my ...
    MikeW MikeW October 2002 Sinclair Miscellaneous
  • Proface AT internal circuit request (pin outs)Does anyone has the circuit of the interface as I have lost mine and I cannot connect it to my speccy.

    Does anyone has the circuit of the interface as I have lost mine and I cannot connect it to my speccy.
    Anestis Anestis February 2004 Sinclair Miscellaneous
  • ANN: Tipshop updated Thursday, 15 April 2004Thursday 15 April 2004 Search engine fixes, and more cheats/maps/tips than a horse has legs! (Eh? Ed) * Updated the alias section of the search fun…

    ... /> solution to Gregory Loses His Clock.

    * Viktor Drozd continues ... , Robozone, Rock 'nRoller, Rubicon, Short Circuit,
    Simpsons: Bart Vs The ...
    hackersanon hackersanon April 2004 Announcements
  • My collection for sale. Full list here!Here's the list of what I am selling. Please contact me at cheggersplayspop*@boltblue.com (remove the *) and make me an offer! TITLE PUBLISHER YEAR …

    ... Doo Encore 1986
    Short Circuit Encore 1986
    Space Harrier ... worn
    Gregory Loses His Clock Mastertronic 1989 inlay seam split ...
    Steve B Steve B May 2004 Sales
  • ANN: Tipshop updated Tuesday, 14 December 2004Tuesday 14 December 2004 I've FINALLY (hopefully?!?!) got caught up with stuff, so here's a fairly big update, with a distinctly mappy feel! * I do…

    ... Warrior ,
    Savage , Short Circuit ,
    Slaine, the Celtic ... Strong Man , Gregory Loses His Clock ,
    Harrier Attack! ... Shockway Rider ,
    Short Circuit , Skool Daze , Slap Fight , ... Prva Akcia , Sabre Wulf , Short Circuit ,
    Street Gang , ...
    hackersanon hackersanon December 2004 Announcements
  • Spectrum Circuit ImageActually, this is about the development of a remake but it seemed the best and most techy place to ask. What I'm after is a decent shot of the Speccy…

    ... decent shot of the Speccy circuit board with all it's ... while the game includes a circuit board image in it, it ...
    Dr Derek Doctors Dr Derek Doctors July 2005 Development
  • +2 (grey) Circuit Schematic?Has anyone got a circuit diagram for the original grey +2? There are a few diagrams in the back of the 128 service manual on WoS, but none of these …

    Has anyone got a circuit diagram for the original grey + ... odd fault in the sound circuit that I want to diagnose ...
    trellis trellis July 2006 Hardware
<1234567…34>

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  • ZX Spectrum Clock Signal Restorer Circuit[SIZE=5][U][B]ZX Spectrum Clock Signal Restorer Circuit[/B][/U][/SIZE]<br /> <br /> The circuit below is an experimental circuit.<br /> It has only b…
  • SpeccyBob circuit diagramsI've had quite a few requests for this lately, so I've decided to put the circuit diagrams for speccybob on my site in their original Protel format:<…
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  • Proface AT internal circuit request (pin outs)Does anyone has the circuit of the interface as I have lost mine and I cannot connect it to my speccy.
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