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  • 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
  • Ninjaman 8-way scrolling 50Hz multicolour demo :-)Here's a demo I've been working on for a while. The goal was to make the best scrolling routine possible on a humble 48K ZX Spectrum. I was origin…

    ... was to make the best scrolling routine possible on a humble ... /> - 50Hz redraw
    - 8-way scrolling
    - Multicolour backgrounds
    - No ...
    Kayamon Kayamon October 2015 Development
  • No contended memory?Sorry if this is a stupid question. But I'm trying to learn more about the ZX Spectrum. If I had a stock 48k Speccy and I could wave a magic wa…

    ... the ULA could grab an entire scan line during the horizontal blank ...
    cbmeeks cbmeeks November 2015 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…

    ... , the Nebula - A Spectrum 48 ULA replacement module. You can read ... .uk/electronics-articles/nebula-spectrum-ula-chip-replacement-module/

    ULA book:)

    Cheers,
    Retroleum Retroleum April 2016 Hardware
  • Currah Microsource ULA & ROMI have a few original (over one hundred) brand new (1986) Microsource ULA's and ROMs in prefect condition. Is anyone interested? My user name may …

    I have a few original (over one hundred) brand new (1986) Microsource ULA's and ROMs in prefect condition.
    Is anyone interested?
    My user name may help authenticate this post.
    dktronics1981 dktronics1981 April 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…

    ... .zigg.net/
    Nebula Spectrum ULA Chip replacement module from... http ... .uk/electronics-articles/nebula-spectrum-ula-chip-replacement-module/
    Runs ...
    RSwipeCA RSwipeCA August 2016 Hardware
  • How to turn OFF the "ULA Plus"??Hi. We've made a platform-game for 128k. While testing it on 2 machines with ULA+ we have noticed the colours are crap. Can You suggest h…

    Hi.

    We've made a platform-game for 128k.

    While testing it on 2 machines with ULA+ we have noticed the colours are crap.

    Can You suggest how to turn off the ULA+ in the code?
    Yerzmyey Yerzmyey September 2016 Sinclair Miscellaneous
  • How would you approach parallax?So ... there is this trick by Joffa that we all know...of waiting for the ULA to reach certain pattern on the screen using the IN command. And then s…

    ... know...of waiting for the ULA to reach certain pattern on ...
    tstih tstih November 2016 Development
  • Contended memory article on WikipediaYeah, apparently there's one. https://en.m.wikipedia.org/wiki/ZX_Spectrum_Contended_Memory [quote] However, the ULA must wait for a Z80 read or wr…

    ... />
    [quote] However, the ULA must wait for a Z80 ... the memory. As the ULA has no capacity to ... in progress when the ULA must read video data, ... also called. To avoid snow, some programs and games ... things together (e.g. snow is something else entirely), and ...
    Hikaru Hikaru December 2016 Sinclair Miscellaneous
  • Scrolling loader counter in 85 T-States?Would it be possible to write a scrolling loader counter in 85 T-States? I have a custom screen load routine that loads attribute first, then the …

    ... be possible to write a scrolling loader counter in 85 T ... I can fudge in a scrolling load counter in 85 t ...
    FrankT FrankT February 2017 Assembler
  • ZX-Paintbrush and global palette and ula+ supportHello, I think I need some help for the palette issue of ZX-Paintbrush. I want to check whether the way I'm about to clear the palette handling i…

    ... the user activates ula+ feature (by opening the ula+ palette editor, ... /> When I now enter the ula+ palette editor...
    [img ... with the new option "Deactivate ula+ palette". This switches back ... colours of the last selected ula+ palette unchanged. To reset ...
    clausjahn clausjahn March 2017 Software
  • No CLK on issue 2 ULA pin 32I'm trying to fix an issue 2. The symptoms are as follows:- Black and white bars on screen, colours near impossible to tune in, although these po…

    ... of CLK on the ULA, but the ULA's I'm using ... .
    Working back from the ULA I tested and changes the ...
    lesoleil70 lesoleil70 April 2017 Hardware
  • ULA+Does the ULA+ have to be on before writing a palette? In the examples I've seen, they all enable the ULA+ before writing the palette. Maybe I sh…

    Does the ULA+ have to be on before ... seen, they all enable the ULA+ before writing the palette.
    Alcoholics Anonymous Alcoholics Anonymous April 2017 Development
  • im looking for a horizontal scroll routinehi, im looking for a horizontal scroll routine. i read somewhere that you can do it with at 'to' statement, somewhere in a print routine. althoug…

    ... />
    im looking for a horizontal scroll routine. i read somewhere ...
    digital digital June 2017 Sinclair Basic
  • ZX 81 / TIMEX TC1000 2C210E ULA'sHi, up for sale: 11x tested 2C210E ULA's, for the ZX Spectrum ZX81 or Timex TC1000. Asking price £29 shipping included to EUROPE, £33 for the …

    ... :

    11x tested 2C210E ULA's, for the ZX Spectrum ...
    o0Nosferatu0o o0Nosferatu0o July 2017 Sales
  • ZX Spectrum 48k ULAlooking for a ZX Spectrum 48k ULA Thanks Phil

    looking for a ZX Spectrum 48k ULA

    Thanks

    Phil
    nama nama September 2017 Wanted
  • ZX Spectrum Issue 4S composite video fuzzy (horizontal blur)Dear people of WoS, Thank you very much for taking the time to read. I have an Issue 4S I recently acquired and planned to fix up as a gift for a…

    ... .67v (4)
    Reseated the ULA (6C001E-7 I don’t ...
    handsfelloff handsfelloff January 2018 Hardware
  • 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 …

    ... ’s book The ZX Spectrum ULA.

    This colour palette ... use the original Sinclair Ferranti ULA, 5C102E, 5C112E or 6C001E. It ...
    rga24 rga24 February 2018 Emulators
  • 6C001EE-7 ULA A ULA ID I haven't seen before, possibly a misprint? Found on an issue 6A board in a rubber key 48k. Any ideas? [img]https://pbs.twimg.com/media…

    A ULA ID I haven't seen before, possibly a misprint? Found on an issue 6A board in a rubber key 48k. Any ideas?

    [img]https://pbs.twimg.com/media/DbYC8aNXkAANAm4.jpg:large[/img]
    impomatic impomatic April 2018 Hardware
  • Fixing a poorly Issue 3 - Odd faults.Here's one for you Spectrum fixers, I warn you it's a long one. I've spent a couple hours this evening doing several repairs on a rubber keyed Speccy…

    ... missing on the emitter. The ULA was also getting hotter than ... strange behavior with the thick horizontal bar rolling down the picture ... resort I tried swapping the ULA with a known working one ... or two. Also relating the horizontal bar that interferes with the ...
    Your Spec-chum Your Spec-chum July 2018 Hardware
  • where can i get ula's from?i want a nebula ula from retroleum but they have sold out. i also googled it and had a look on ebay and i cant even find any normal ula's either.

    i want a nebula ula from retroleum but they have sold out. i also googled it and had a look on ebay and i cant even find any normal ula's either.
    digital digital October 2018 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 …

    ... 2 with a 5C112E-2 ULA. Just had to replace ... maybe a problem in the ULA could cause b) or ... great book "The ZX Spectrum ULA: How to design a ... br /> Patrick

    My ULA Y output:
    [img]https ... ://i.postimg.cc/HxDsHvPC/ULA-Y.jpg[/img]
    ...
    paf paf November 2018 Hardware
  • Spectrum 48k Plus - Scrolling horizontal linesI performed a standard composite mod on my Spectrum Plus. I followed the instructions to the letter and it went fine and the picture displays on both…

    I performed a standard composite mod on my Spectrum Plus. I followed the instructions to the letter and it went fine and the picture displays on both LCD & CRT TVs but there are a couple of dark, thick bars slowly rolling up the image. You can see the ...
    P5YCHOFOX P5YCHOFOX January 2020 Hardware
  • Zynaps scrolling - anyone ever reverse enginnered this?Zynaps has IMO some impressive scrolling - it utilises 18 character rows of the display file, so quite a large active play area, and scrolls 2 pixels…

    Zynaps has IMO some impressive scrolling - it utilises 18 character rows ...
    dmsmith dmsmith July 2020 Games
  • 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…

    ... copy of the ZX Spectrum ULA book by Chris Smith that ...
    Mr Millside Mr Millside October 2020 Sales
  • 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
  • New Version of ZEsarUX v9.3 Beta 1 availableNew Version of ZEsarUX v9.3 Beta 1 available Downloads: [url="https://github.com/chernandezba/zesarux/releases/tag/9.3-25062021"]https://github.co…

    ... : click (toggle breakpoint, change registers), scrolling up/down by using the ... window height
    Fixed Next ULA Scroll to use registers 0x26 ...
    Luzie Luzie June 2021 Emulators
  • 48k ULA heat sink required ?ULA heat sink worthwhile mod or just internet hype ? if worthwhile is a cheap heat sink going to cut the mustard ? i wonder if anybody has done any …

    ULA heat sink worthwhile mod or just internet hype ? if worthwhile is a cheap heat sink going to cut the mustard ?
    i wonder if anybody has done any before & after heat tests ?
    mark8bit mark8bit October 2021 Hardware
  • ZEsarUX 10.0ZEsarUX 10.0 is out! Download it from : https://github.com/chernandezba/zesarux/releases/tag/10.0 Changes: Version 10.0 - Clive Sinclair edi…

    ... : click (toggle breakpoint, change registers), scrolling up/down by using the ... window height
    Fixed Next ULA Scroll to use registers 0x26 ...
    chernandezba chernandezba October 2021 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…

    ... functionality of the Interface 1 ULA, similar to the "The ZX ... Spectrum ULA" book?

    Specifically, what ... the ROMEN lines of the ULA? Superficially, ROMCS feeds into the ...
    Jonathan Harston Jonathan Harston December 2021 Hardware
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