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  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... with external RAM or an FPGA and you plug it in ...
    chev chev August 2012 Sinclair Miscellaneous
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... 'll have to give the FPGA a look, I'd like ...
    BiNMaN BiNMaN August 2012 Sinclair Miscellaneous
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... dirty- solution to make the FPGA tolerant to 5V inputs really ... main chips: a Spartan 3E FPGA with 100K gates, and a ... (Digital Clock Management) inside the FPGA, which in turn generates all ...
    mcleod_ideafix mcleod_ideafix August 2012 Sinclair Miscellaneous
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... dirty- solution to make the FPGA tolerant to 5V inputs really ... main chips: a Spartan 3E FPGA with 100K gates, and a ... (Digital Clock Management) inside the FPGA, which in turn generates all ...
    ANDREW RYALS ANDREW RYALS August 2012 Sinclair Miscellaneous
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... next: properly align the VQ100 FPGA chip, solder it, and hand ... 've used to make the FPGA 5V tolerant (placing 270 ohm ... by Digilent in their FPGA trainers to interface FPGA with PS/2 ... hours to ensure that the FPGA input buffers have not suffered ...
    mcleod_ideafix mcleod_ideafix August 2012 Sinclair Miscellaneous
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... your HAM256 viewer on my FPGA core and also I'd ...
    adorigatti adorigatti August 2012 Emulators
  • More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.

    ... your HAM256 viewer on my FPGA core and also I'd ...
    chev chev August 2012 Emulators
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... next: properly align the VQ100 FPGA chip, solder it, and hand ...
    Winston Winston August 2012 Sinclair Miscellaneous
  • Spectrum30 Show in Cambridge, 08th-09th September 2012Hello Spectrum-fans, after many months of preparation we now proudly present what will be the biggest Spectrum venue of the last 20 years. We manage…

    ... this year, with my Speccy2010 FPGA system, and other gubbins, but ...
    Hercules Hercules August 2012 Sinclair Miscellaneous
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... 's based upon a 5V FPGA which is no longer available ... ;646708]well its in an FPGA, so the soft-core could ... with external RAM or an FPGA and you plug it in ...
    Fruitcake Fruitcake August 2012 Sinclair Miscellaneous
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... making a non-5v tolerant FPGA buffered to work with a ...
    Winston Winston August 2012 Sinclair Miscellaneous
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... assumed it's a Spartan FPGA, but now I'm not ...
    mcleod_ideafix mcleod_ideafix August 2012 Sinclair Miscellaneous
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... /> The top side contains the FPGA, platform ROM, oscillator and AD724 ... , and decoupling capacitors for the FPGA and other chips.

    FPGA and the platform ROM. The ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... transfer the configuration to the FPGA upon power-on. If the ... enough and finishes before the FPGA is fully configured and the ...
    superfo superfo August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... (it's for a XC3S100E FPGA), the transfer time is about ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    You can always have your board control the reset circuit on the Spectrum - of course it'll need 2 new wires soldering, but you can absolutely guarantee the Spectrum won't come out of reset until your FPGA is ready.
    Winston Winston August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... out of reset until your FPGA is ready.[/QUOTE]

    FPGA: at cycle 0, the output ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... ... I didn't buy 20 FPGA's to build 20 "ULA ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... ... I didn't buy 20 FPGA's to build 20 "ULA ...
    Johan1973 Johan1973 August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... discussed here, the Spartan 3E FPGA needs a certain amount of ... stated, is to have the FPGA to reset the Z80 once ... a wire soldered from the FPGA to the reset line at ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... there's room in the FPGA to decode another OUT is ...
    guesser guesser August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    Could this FPGA implementation produce a VGA compatible RGB+sync signals (RGB should be level compatible, only sync is different as far as I know).
    Johan1973 Johan1973 August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... here, the Spartan 3E FPGA needs a certain amount of ... , is to have the FPGA to reset the Z80 once ... a wire soldered from the FPGA to the reset line ... can use "DONE" signal from FPGA to reset Z80. "DONE" ... go HI when FPGA finish loading code from flash ...
    superfo superfo August 2012 Hardware
  • A new ZX spectrum cloneOver the past 12 months i have been developing a new spectrum clone as a hobby project to waste my spare time on. It is still not fully complete yet …

    ... , as everything was done in FPGA (totally soft rom based), and ...
    Hercules Hercules August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... there's room in the FPGA to decode another OUT is ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... the Spectrum PCB to the FPGA clock input.

    I ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... the hardware and completing the FPGA programming). I'm using the ...
    JeffB JeffB August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    [QUOTE=Johan1973;648951]Could this FPGA implementation produce a VGA compatible ... 9KB of RAM inside the FPGA, so it's possible to ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... JTAG chain and program the FPGA and the platform EPROM accordingly ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... it can do in an FPGA clone.....
    csmith csmith August 2012 Hardware
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Latest Posts

  • I bought an accoustic guitar. How do you play it?
    dm_boozefreek on 7:51PM
  • Goodbye Z80
    zx1 on 7:11PM
  • Happy 40th Birthday to the Amstrad CPC464!
    AndyC on 6:29PM
  • Another Birthday! The Game Boy Is 35!
    dm_boozefreek on 6:17PM
  • I am currently watching.....
    Antiriad2097 on 5:05PM
  • 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
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21

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