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<1234567…34>
  • ZX Spectrum ULA + Glue Logic in VHDL for EPM78128SLC84Hi. I'm wanting the VHDL code for the Spectrum ULA and Glue logic to pop onto a Alter MAX EPM7128SLC84 (CPLD) IC. I'm wanting it to perform : Memo…

    ... the VHDL code for the Spectrum ULA and Glue logic to pop ...
    Various other essential ZX Spectrum functions

    I know ...
    lezanderson lezanderson February 2013 Hardware
  • ZX Spectrum ULA + Glue Logic in VHDL for EPM78128SLC84Hi. I'm wanting the VHDL code for the Spectrum ULA and Glue logic to pop onto a Alter MAX EPM7128SLC84 (CPLD) IC. I'm wanting it to perform : Memo…

    ... the VHDL code for the Spectrum ULA and Glue logic to pop ...
    Various other essential ZX Spectrum functions

    I know ...
    lezanderson lezanderson February 2013 Development
  • Retroleum Nebula - A Spectrum ULA replacement moduleHey you guys.. Just wanted to mention a new Spectrum doobrie created by myself (Phil Ruston) and Alessandro Dorigatti: Namely, the Nebula - A Spec…

    ... wanted to mention a new Spectrum doobrie created by myself ... , the Nebula - A Spectrum 48 ULA replacement module. You can read ... .co.uk/electronics-articles/nebula-spectrum-ula-chip-replacement-module/
    ... to Chris Smith for the ULA book:)

    ...
    Retroleum Retroleum April 2016 Hardware
  • The ZX Spectrum ULA bookFound a copy of the ZX Spectrum ULA book by Chris Smith that I've never read. This is a new book that was given to me years ago and I've never got ro…

    ... a copy of the ZX Spectrum ULA book by Chris Smith that ...
    Mr Millside Mr Millside October 2020 Sales
  • 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 ... written a number of ZX Spectrum clones using: this core, a ... 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
  • Wanted Spectrum ULAI'm looking for a working replacement ULA for my Issue 3B Spectrum. Revision 6C001E-6 or 6C001E-7. Thanks!

    I'm looking for a working replacement ULA for my Issue 3B Spectrum. Revision 6C001E-6 or 6C001E-7.

    Thanks!
    protek protek April 2014 Wanted
  • Spectrum 48K / composite mod / LCD TV: voltages out of the ULAHello Spectrum World I have juste bought again my first computer on ebay... a Speccy 48k issue 2 with a 5C112E-2 ULA. Just had to replace TR4 and …

    Hello Spectrum World

    I ... 2 with a 5C112E-2 ULA. Just had to replace ... the great book "The ZX Spectrum ULA: How to design a ... /> Patrick

    My ULA Y output:
    [img]https ... ://i.postimg.cc/HxDsHvPC/ULA-Y.jpg[/img]
    ...
    paf paf November 2018 Hardware
  • zx spectrum ULA upgradei have a issue 2 zx spectrum 16k which i upgraded to 48k .. i believe the ULA is faulty (ULA5C112E-2) .. seems intermittent i know a later one can be…

    i have a issue 2 zx spectrum 16k which i upgraded to 48k .. i believe the ULA is faulty (ULA5C112E-2) .. seems intermittent i know a later one can be used but should some resistor values be changed to match it ?
    thanks mark ..
    mark8bit mark8bit January 2021 Hardware
  • 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 ...
    MARKZX MARKZX July 2007 Hardware
  • Who has an Issue 1 or Issue 2 Spectrum??Do you have an Issue 1 or 2 Spectrum (ie machines with 5C102E and 5C112E ULA's) ??? I'm doing a lot of research into the ULA and also the reasoning …

    ... or 2 Spectrum (ie machines with 5C102E and 5C112E ULA's) ... of research into the ULA and also the reasoning ... instance in the ZX Spectrum Service Manual) for what ... a free book "The ZX Spectrum ULA".

    One ... RAS line of the ULA _ever_ go high impedance ...
    csmith csmith November 2007 Games
  • Spectrum ULA replacement!Hi gang.. The Speccy 48 ULA Replacement is *almost* here ;) There has been lots of activity in building the CPLD board, sorting out some irritating…

    ... gang..
    The Speccy 48 ULA Replacement is *almost* here ;)

    Anyway, the machine with ULA replacement doesn't quite boot ...
    csmith csmith April 2008 Hardware
  • ULA Book - Target Audience?This is probably of most intrerest to hardware chaps, but a greater community input would be good. I've been turning all my ULA analysis into a love…

    ... called "The Sinclair ZX Spectrum ULA". I'm doing this ... ULA encapsulates.
    Do I pitch it at the Spectrum ... internals educated reader, and assume readers know what the ULA ... 't want to dulplicate the "Spectrum Hardware Manual"....

    ...
    csmith csmith May 2008 Sinclair Miscellaneous
  • Spectrum ULA Book AnnouncementFurther to getting inside the ULA, I've turned my ramblings and lab book into a more professional book that you can all own! I'm putting a lot of ef…

    Further to getting inside the ULA, I've turned my ramblings ...
    csmith csmith December 2008 Hardware
  • Where: ZX Printer ULA's and ZX interface I ULA'sIs there any source left for these ULA's? Alot of tings can be replaced, like the ZTX transistors and occasionally you can come accross a normal ZX S…

    Is there any source left for these ULA's? Alot of tings can be replaced, like the ZTX transistors and occasionally you can come accross a normal ZX Spectrum ULA, but I have never seen these anywhere?
    georgedb georgedb September 2009 Hardware
  • zx spectrum ULAis the ULA in the 16K the same as in the 48K could you take the 16K ULA and place it in a 48K I ask this because i have a speccy thats dogy with th…

    is the ULA in the 16K the same as in the 48K

    could you take the 16K ULA and place it in a 48K

    I ask this because i have a speccy thats dogy with the graphics and my 16K has keyboard issues

    thanks
    Robin Robin October 2010 Hardware
  • ZX Spectrum 48K clone and test resultsHi! This is my first post, so, first of all, I'd like to say hello to the whole community! I am Alessandro Dorigatti from Italy and I'm developing …

    ... 'm developing a new ZX Spectrum 48K clone based on the ... of Chris Smith "The ZX Spectrum ULA: how to design a microcomputer ...
    adorigatti adorigatti July 2011 Hardware
  • Chris Smith's ULA talk - live today (Sat Jul 23) 4pm BSTChris Smith's talk on the Spectrum ULA at Euskal Encounter will be broadcast live today on the Basque country public TV's website! Sorry about the sh…

    ... Smith's talk on the Spectrum ULA at Euskal Encounter will be ... , and the second about the ULA and its reverse engineering.
    Winston Winston July 2011 Announcements
  • How far are we from a single-chip 100% ZX Spectrum compatible solution?I really like to read about the projects of some geniusses here on WoS who are working on their ZX Spectrum clones. IMHO some main steps that have b…

    ... are working on their ZX Spectrum clones.

    IMHO ... complete description of the ZX Spectrum ULA
    2. the clones ... logic chips
    3. the ULA plus/SPECTRA solutions inside an ... which can act as ZX Spectrum, with complete hardware compatibility?
    bverstee bverstee December 2012 Hardware
  • Which ULA?Just a quick question, more of interest rather than immediate need... I am thinking ahead about the repair of an Issue 2 board, and also an Issue 6A …

    ... of which 'may' need replacement ULA chips.

    After a ... not sure whether any ZX Spectrum ULA can be used, or whether ... each issue has specific ULA chip requirements. I'd be ... before heading down the new ULA route.

    Cheers,
    Simon_Carr Simon_Carr June 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…

    ... some problems with the ZX Spectrum clock signal.
    With ... work properly on a ZX Spectrum 128K toastrack.

    ... of machines:
    - 1x ZX Spectrum 48K with unmodified NEC rom ... .


    [U]ZX Spectrum ULA differences[/U]
    As you ...
    bverstee bverstee September 2013 Hardware
  • 48k Spectrum ULA issue?Hi All, Have a couple of Spectrums Plus' with their orignal ULAs showing the failure as in screen 2 on the left. [URL="http://hardware.speccy.org/i…

    ... confirm this is probably the ULA? I get the same error ... in other Spectrums using the ULA's so I'm virtually ...
    owdeuk owdeuk May 2014 Hardware
  • 48k Spectrum ULA 6C001E-6 ChipAs title says, for sale: ULA 6C001E-6 Chip PM if interested.

    As title says, for sale: ULA 6C001E-6 Chip

    PM if interested.
    dreamscape dreamscape September 2014 Sales
  • Bizarre ZX Spectrum faults (also possibly relevant to Spectranet compatibility problems).I'm attempting to repair an issue 4A 48K ZX Spectrum and am encountering some very strange problems. For my own records I've given this computer the …

    ... less long winded than 'the Spectrum under repair' or similar). I ... 6C001E-7 ULA, taken from a working issue 6 Spectrum. The odd ... issue 6 Spectrum functioned perfectly when fitted with the ULA from ZX285 ... that so long as a Spectrum ULA is not faulty, it has ...
    Zorn Zorn February 2016 Hardware
  • Memory and Replacement ULA modules.Thought you might like to see my future proofed 48k version 6A with some upgrades fitted. Has had the following... Recap. Traco Power TSR 1-2450 p…

    ... ://zx.zigg.net/
    Nebula Spectrum ULA Chip replacement module from... http ... .co.uk/electronics-articles/nebula-spectrum-ula-chip-replacement-module/
    Runs ...
    RSwipeCA RSwipeCA August 2016 Hardware
  • New colour palette for Spectrum emulators, 16K/48K/+ machinesI’ve made a colour palette for 16K/48K/+ machines, based on the YUV voltage tables in Chris Smith’s book The ZX Spectrum ULA. This colour palette …

    ... Smith’s book The ZX Spectrum ULA.

    This colour palette ... suitable for ZX Spectrum 16K, ZX Spectrum 48K and ZX Spectrum+ machines, basically ... machines which use the original Sinclair Ferranti ULA ...
    rga24 rga24 February 2018 Updates
  • New colour palette for 16K/48K/+ machines, based on ULA YUV voltagesI’ve made a colour palette for 16K/48K/+ machines, based on the YUV voltage tables in Chris Smith’s book The ZX Spectrum ULA. This colour palette …

    ... Smith’s book The ZX Spectrum ULA.

    This colour palette ... suitable for ZX Spectrum 16K, ZX Spectrum 48K and ZX Spectrum+ machines, basically ... machines which use the original Sinclair Ferranti ULA ...
    rga24 rga24 February 2018 Emulators
  • Interface 1 ULAIs there a technical description of the functionality of the Interface 1 ULA, similar to the "The ZX Spectrum ULA" book? Specifically, what is the…

    ... the Interface 1 ULA, similar to the "The ZX Spectrum ULA" book?
    ULA? Superficially, ROMCS feeds into the Spectrum to disable ...
    Jonathan Harston Jonathan Harston December 2021 Hardware
  • Sinclair Spectrum ULA BookAnnounced in the Hardware forum, but might be interesting to others: [url]http://www.worldofspectrum.org/forums/showthread.php?p=324213[/url] Regar…

    Announced in the Hardware forum, but might be interesting to others:

    [url]http://www.worldofspectrum.org/forums/showthread.php?p=324213[/url]

    Regards
    Chris
    csmith csmith December 2008 Sinclair Miscellaneous
  • Is there any video input on expansion bus?Imagine you want to build a custom display hardware, for instance, to add hardware sprites to display. Is it possible to design such a device so that…

    Imagine you want to build a custom display hardware, for instance, to add hardware sprites to display. Is it possible to design such a device so that the video signal can go into Spectrum, ULA and then to standard RF socket?
    maiki maiki March 2010 Hardware
  • OMD at the Vintage Computing FestivalJust got this via Farcebook: (Also add to the list of speakers our very own [B]csmith[/B] on the Spectrum ULA) NEWS RELEASE A walk on the geek side …

    ... [B]csmith[/B] on the Spectrum ULA)

    NEWS RELEASE
    Winston Winston April 2010 Announcements
<1234567…34>

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