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<1234567…34>
  • Spectrum CP/MHello.. Just out of curiosity, has anyone actually used +3 CP/M for any practical purpose? I remember booting it up a couple of times years ago, jus…

    ... If you work at the ULA/FPGA/CPLD/whatever level, you can ... as a GAL, CPLD, or FPGA.
    [/quote]

    FPGA :) The difference is only ... can be said of an FPGA, especially the OTP ones ... end up with an FPGA that cannot be reprogrammed.< ...
    Alcoholics Anonymous Alcoholics Anonymous November 2013 Sinclair Miscellaneous
  • PoC for a ULA video generator described using Handel-C and a Basys FPGA board.Recently, I've taken a course about hardware design for video processing using FPGA's. The HDL used in the course was Handel-C, a C look alike langua…

    ... video processing using FPGA's. The HDL ... , an academic level FPGA board, quite cheap. ... description of the ULA behaviour when generating ... FPGA is rated at 25MHz instead of 14MHz of the original ULA ... FPGA runs several FSM in parallel: one of them is the ULA ...
    mcleod_ideafix mcleod_ideafix November 2010 Hardware
  • ULA......Woooooo and ULA 160??'ello all from down under ! they don't know the speccy well this way it seems, anyways, picked up my brand new astra yesterday, and it's got some …

    ... plates on it

    ULA 160

    i'm ... so if anyone has any idea if the 160 bit has ...
    bleugh bleugh November 2006 Sinclair Miscellaneous
  • Fpga?I visited this page: [url]http://www.fpga.ch/retro/zx.php[/url] and I have no idea what it is. I checked google and wikipedia but I still don't get…

    I visited this page:

    [url]http://www.fpga.ch/retro/zx.php[/url]

    and I have no idea what it is. I checked google and wikipedia but I still don't get it. Anyone? :-?

    edit: I also searched the forums.
    zxbruno zxbruno February 2007 Sinclair Miscellaneous
  • Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…

    ... want to know is the ULA the same from issue 3 ... they are ok .Anybody any idea of the fault?

    MARKZX MARKZX July 2007 Hardware
  • 2 new FPGA based clone from russiaFirst of all I wanna introduce you to the [B]ZX Evo[/B] by NedoPC -> [URL="http://www.nedopc.com/zxevo/zxevo.php"]http://www.nedopc.com/zxevo/zxevo.p…

    ... , Covox) with an FPGA instead of an ULA, so you can make ... and AY being in the FPGA as well, "only" 2MB ... use Z80-Cores on the FPGA, which can be clocked at ... the limit of the FPGA, which is 60Mhz virtually breaking ... long as you program the FPGA appropriately.
    Shockwav3 Shockwav3 August 2009 Hardware
  • Where's the border line between a Spectrum and something else?I mean: there are purists out there that consider that anything that is not a true Sinclair Spectrum, with a true Z80 and a true ULA, and at most, 48…

    ... true Z80 and a true ULA, and at most, 48K RAM ... people who have a relaxed idea of what is a Spectrum ... includes here all the recent FPGA-based clones, like the one ...
    mcleod_ideafix mcleod_ideafix August 2009 Development
  • Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…

    ... read a bit in the ULA+ for test if supported. And ... and sprites.

    My idea for hardware scroll is simple ... bits of displacement, and the ULA start the frame with the ... do you think about this idea?
    antoniovillena antoniovillena October 2011 Development
  • Experiments mixing ULA+ and Timex Hicolour featuresI'm trying to improve my Verilog skills, so I've written a description of a complete ZX Spectrum 128K (+2 grey ROMs), with AY-3-8912. I wanted to add…

    ... -8912. I wanted to add ULA+ support, and in the way ... Starter Board, with a XC3S1000 FPGA. No double port RAM has ... been used to implement the ULA+ palette registers.

    I ... to add this to the ULA+ page, if you wish ...
    mcleod_ideafix mcleod_ideafix April 2012 Hardware
  • ZX Spectrum ULA core available at OpenCoresHi! On April, 23th, I opened a new project at the OpenCores website: [url]http://opencores.org/project,zx_ula,Overview[/url] Right now, it has a, h…

    ... , hopefully, complete description of the ULA chip, written in Verilog, and ... input because it isolates the FPGA pins from dangerous levels that ... on it to act as ULA, with a true Z80 and ... way I hope to tune ULA timmings in case there's ...
    mcleod_ideafix mcleod_ideafix April 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…

    ... flash chip to store FPGA configuration. An optional AD724 ... you will make an idea of its true size.< ... pins of the ULA socket to FPGA interface need to ... /> Quoting from Digikey:
    FPGA: 9.53 EUR (VQ100, smaller ... for SMD soldering. The idea seems cool to me, ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Configuration of FPGA coresHi all! Lately a lot of features have been added to the V6Z80p Spectrum core. Most of them are handled (clearly) using ports. Some examples: ULA+, Ti…

    ... ) using ports.
    Some examples: ULA+, Timex modes, Kempston Joystick, etc ... also for
    other hardware/FPGA core developers!

    If ...
    adorigatti adorigatti January 2013 Hardware
  • Spectrum FPGA clone with HDMI video output by Jozsef LaszloThis clone is based upon the ULA core I wrote for opencores.org . It features a scandoubler and HDMI conversion engine. Jozsef has found that a 28MHz…

    ... clone is based upon the ULA core I wrote for opencores ... first suggested.

    The FPGA used is a Spartan 6 ...
    mcleod_ideafix mcleod_ideafix July 2013 Hardware
  • ULA Replacement??I searched, but maybe I just missed it. Has there (or is there) anyone working on a ULA replacement either as an FPGA or CPLD package? Or, perhap…

    I searched, but maybe I just missed it.

    Has there (or is there) anyone working on a ULA replacement either as an FPGA or CPLD package? Or, perhaps something else such as a microcontroller?

    Thanks
    cbmeeks cbmeeks October 2015 Hardware
  • an idea that could be very very good...but also very very bad...Hello all! I've been having a chat with some of my friends round here that once loved the spectrum (well...2...as they're all heathens round here...)…

    ... whacking an FPGA system together - the interaction between the ULA and the ... yet. If someone had accurate FPGA implementation then they really should ... portable spectrum is a nice idea, but it will never be ...
    BN^2 BN^2 January 2004 Emulators
  • Fpga?I visited this page: [url]http://www.fpga.ch/retro/zx.php[/url] and I have no idea what it is. I checked google and wikipedia but I still don't get…

    ... the chip. In short, an fpga is programmable hardware.

    fpga; this is usually done by ... a serial EEPROM into the fpga during power up. Another type ... /> The spectrum's ULA is a similar idea but the 'granularity' on ...
    Alcoholics Anonymous Alcoholics Anonymous February 2007 Sinclair Miscellaneous
  • ULA Replacement WORKS !Hi chaps. Lots of activity over the last couple of weeks, and _finally_ we have [B]a working ULA replacement[/B] !! The analogue components such …

    ... that you can replace the ULA, how small could you make ... (IIRC) a Z80, ULA and ROM in one FPGA. RAM is connected ... .

    Now the ULA in ZX Gate is not ... but it gives you an idea of how small a speccy ... scale. With a big enough FPGA you can get an entire ...
    Phu Phu May 2008 Hardware
  • 2 new FPGA based clone from russiaFirst of all I wanna introduce you to the [B]ZX Evo[/B] by NedoPC -> [URL="http://www.nedopc.com/zxevo/zxevo.php"]http://www.nedopc.com/zxevo/zxevo.p…

    ... way :-( ?[/QUOTE]

    The idea is that, yes, you will ... />
    I'm writing the ULA book at the moment, but ... it'll have a big FPGA after all), and 100% compatible ...
    csmith csmith August 2009 Hardware
  • 2 new FPGA based clone from russiaFirst of all I wanna introduce you to the [B]ZX Evo[/B] by NedoPC -> [URL="http://www.nedopc.com/zxevo/zxevo.php"]http://www.nedopc.com/zxevo/zxevo.p…

    [QUOTE=csmith;376879]The idea is that, yes, you will ... />
    I'm writing the ULA book at the moment, but ... it'll have a big FPGA after all), and 100% compatible ...
    Cignale Cignale August 2009 Hardware
  • Where's the border line between a Spectrum and something else?I mean: there are purists out there that consider that anything that is not a true Sinclair Spectrum, with a true Z80 and a true ULA, and at most, 48…

    ... consider the current generation of FPGA-based clones to be 'real ... execution of the Z80 and ULA. In other words, if it ... of microseconds elapsed between the ULA getting a 'turn the border ... .

    I have no idea why I've settled on ...
    gasman gasman August 2009 Development
  • RGB to VGA convertor for ZX128/+2/+2A/+3David Luftner release source code (VHDL) of SCANDOUBLER for ZX128/ZX128+2/+2A/+3: [url]http://velesoft.speccy.cz/other/scandoubler-for-zx128_fixed_by…

    ... and the idea I had in mind was a ULA+ on a ... of is a ULA+ implementation, the original ULA will still be ... ll use an XC3S50-AN FPGA rather than a CPLD ... the internal memory of the FPGA, I've thought of some ... the CPU clock while in ULA contention. (Actually for a ...
    Winston Winston July 2010 Hardware
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... domain, although I have no idea how they could use it ... about?

    Wow the ULA Plus looking amazing and this ... explain in simple terms what FPGA is? There are numerous references ...
    Rebelstar Rebelstar December 2010 Hardware
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... an ideal world, the idea of developing a new British ... being for and against the idea.

    So ...

    - Using an FPGA is cheaper and smaller than ... - It would be a good idea to add support for the ... or portions of it? ULA plus is impressive. The ...
    Rebelstar Rebelstar December 2010 Hardware
  • Sam Coupe clonesAnybody know of any Sam Coupe clones? If they are available, are their any available to buy at the moment? Should of posted this in hardware. Sorry,…

    ... clone. Architecture of SAM COUPE ula is not so hard. I ... this project.

    My idea is:
    - compatibility with SAM ... Pentagon
    - ula implemented in big CPLD+SRAM or FPGA chip
    velesoft velesoft July 2011 Hardware
  • Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…

    ... emulator is well implemented). The idea in the demo is doing ... .
    2. The modification is ULA safe. So any old program ... minimal, probably need less FPGA space than in ULA+.

    Of ...
    antoniovillena antoniovillena October 2011 Development
  • Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…

    ... emulator is well implemented). The idea in the demo is doing ... .
    2. The modification is ULA safe. So any old program ... minimal, probably need less FPGA space than in ULA+.

    Of ...
    BiNMaN BiNMaN October 2011 Development
  • Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…

    ZX prism (FPGA Based Spectrum) will do ULA+ plus a number of ... Z80 (open core within the FPGA).

    HOWEVER
    ... originally planning on following the ULA+ idea of having something that ... daft - the FPGA was already replacing the ULA, CPU and to ...
    JeffB JeffB November 2011 Development
  • Add horizontal hardware scroll to ULA+In this case we must read a bit in the ULA+ for test if supported. And the future software that uses it must have to branch: 1. If hardware scroll i…

    ... ]ZX prism (FPGA Based Spectrum) will do ULA+ plus a ... Z80 (open core within the FPGA).

    HOWEVER
    ... originally planning on following the ULA+ idea of having something that ... 32 colours). ULA+ is also interesting in FPGA based designs like ...
    antoniovillena antoniovillena November 2011 Development
  • What happened to the Elite Systems Spectrum?Back in February of this year I read an article that Elite Systems were going to re-release the ZX Spectrum for the 30th Anniversary in 2012. Is thi…

    ... keyboard and connectors. :) Great idea![/QUOTE]

    Well ... soldered on. That's the idea anyway.

    ... you'll get the idea - but with MUCH ... peripherals such as ZXMMC+, ULA+, and hopefully expansion ... not FPGA either, but will be a modern day ULA, ...
    csmith csmith November 2011 Hardware
  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... ]it's a really nice idea, but I don't know ... this. As soon as the idea popped in my head I ... think it's an amazing idea and I'd certainly like ... with external RAM or an FPGA and you plug it in ...
    chev chev August 2012 Sinclair Miscellaneous
<1234567…34>

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