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  • 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…

    ... , based on the ideas behind ULA+ and SPECTRA. When the Z80 ... using a spare ordinary 48K ULA to turn the contents of ... Speccy cope with writing to ULA-contended memory of an external ... chippery, or just a spare ULA from a dead Speccy and ...
    joefish joefish April 2014 Hardware
  • Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…

    ... Timex-multicolour functions from the ULA+ specification[/B].

    ... we can actually get internal ULA+ upgrades, it would have ... probably be best if the ULA+ OUT commands that control the ... without much support. And yet ULA+ seems to be something people ...
    joefish joefish April 2014 Hardware
  • Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…

    ... wrong power supply as the ULA had a bit missing and ...
    Brian Brian April 2014 Hardware
  • what video leads were available for 128+toast rack at the timei just wondered if anyone knows what original video leads were available for the toast rack at the time it came out,were they sinclair or 3rd party a…

    ... safe leads that wouldnt blow ula`s or anything else up ...
    zedexspectrum zedexspectrum April 2014 Hardware
  • Toastrack key sound but no imageGot a toaster that had a bad ULA, replaced that with one out of a grey +2 (Im sure ive done this in the past and it was ok), now i get the menu up bu…

    ... toaster that had a bad ULA, replaced that with one out ...
    Macc Macc April 2014 Hardware
  • 48k no beeper sound (again!)Got three 48k+ here, all of which have the same exact problem, no sound out the beeper, same problem as detailed [URL="http://www.worldofspectrum.org…

    ... however the same solution, replaced ULA's to no avail and ... tried the original ULA's in a known worker ...
    Macc Macc April 2014 Hardware
  • Using VAC PSU in DC deviceHaving fixed the dead Issue 3B, I began to wonder about the PSU that came with it. It was pretty obvious what had killed the poor Spectrum as the PSU…

    ... and upper RAM, partially dead ULA and lifted trace from CPU.
    protek protek April 2014 Hardware
  • Yellow issue 4A keyboard madnessNote sure if this is a similar problem to the one CornishManicMiner has, but one of my yellow issue 4A boards is driving me crazy. I had it in variou…

    ... the Saga). I replaced the ULA and all was working when ...
    schombi schombi May 2014 Hardware
  • HDMI generation by cloning video ram(coming from [url]http://www.worldofspectrum.org/forums/showthread.php?p=768257&posted=1#post768257[/url]). A thing I was brainstorming about.. Why …

    ... /> No more need for a ULA ;)
    bverstee bverstee May 2014 Hardware
  • 48K: Half of copyright message in the middle of the screen?!Issue two. Has 74LS08 over the Z80, but the ULA is 5C112E-3 (I think this should be a 5C102E??? - I have one, but I'm not sure if it is working, at l…

    ... over the Z80, but the ULA is 5C112E-3 (I think ... not possible without (a) working ULA, CPU, ROM and lower memory ... added 74LS08 go to the ULA, but are loose. They were ...
    georgedb georgedb May 2014 Hardware
  • New version Emulator ZEsarUX-1.0Hi I have uploaded a new version of my Spectrum/ZX80/ZX81 emulator. This is a major stable version, with real timing for all the models and with hi-…

    ... memory, snow in border, colour ula delay, interrupt starts at video ... option to view CPU & ULA registers
    Added option to ...
    chernandezba chernandezba May 2014 Emulators
  • Spectrum items for saleI have many Spectrum items like Spectrum, Spectrum +, power adapters, Centronics Interface, Kempston Interface, Light Pen Interface(these are built b…

    ... they will still work), some ULA's,Z80 CPU,membranes, some ...
    techiecal techiecal May 2014 Sales
  • Spectrum+ keyboard issueHi I have a spectrum+ (issue 4s board) where the 1-5 keys do not work. I have replaced the membrane and checked for continuity. I have also tested …

    ... /> I have also swapped the ULA for a known woking one ...
    acsi acsi June 2014 Hardware
  • 48K keyboard issue48K issue 3b reads keys without... keyboard. Looking at recorded keys, problems seems to be with one data line - D1. It happens after a while since p…

    ... since powered. I will swap ULA, but any other ideas ?
    kpuchatek kpuchatek June 2014 Hardware
  • cause of 1 tstate differencethe sinclair faq, located at: [url]http://www.worldofspectrum.org/faq/reference/48kreference.htm[/url] says: "NB: Investigations in May 2004 have rev…

    ... with the same model of ULA. Some machines use the timings ... understood."

    After digging ULA for 10 years, I hope ...
    Arda Arda June 2014 Hardware
  • Microdrive-Microdrive incompatibility?Hi All! Finally I could get enough Microdrives and connecting blocks (or cable replacement) to make the largest storage configuration of the classic…

    ... the microdrives to check the ULA version/manufacturing date or the ... ISS4 board with LA15-302 ULA and edition 2 ROM. (the ...
    jimre jimre June 2014 Hardware
  • ZXDS 1.3.0Hello, I am really glad I can announce one more [URL="http://zxds.raxoft.cz"]ZXDS release[/URL] on this special day. The major new feature is the lo…

    ... feature is the long-demanded ULA+ emulation, which required way more ...
    Patrik Rak Patrik Rak July 2014 Emulators
  • New Spectrum User - Inveterate UpgraderI've been asking a few questions about my Speccy, which is the first I've owned despite my advancingh years. I was a C64 kid, but please don't hold …

    ... . I've also got a ULA heatsink on the way, and ...
    Wiffleplop Wiffleplop July 2014 Hardware
  • Bypassing bits of faulty ULAs: the LOAD!Hi everybody, Recently I had a sick Spectrum sent to me. The symptoms were that the machine would run fine, except that it wouldn't load. The border…

    ... are probably thinking "Argh! The ULA has gone!". And indeed, ... . When I plug the ULA into a working machine, ... to stop us bypassing the ULA altogether? So I did. ... tape input instead of the ULA's pin (by which ... buffer enable back to the ULA pin 33 again (otherwise ...
    Spirantho Spirantho July 2014 Hardware
  • The ULA6C001E-5...Hi everybody, I have been continuing my Quest for the Holy ULA, and have today taken delivery of a ULA6C001E-5. Now, the -6 was used in Issue 3 boar…

    ... my Quest for the Holy ULA, and have today taken delivery ...
    Spirantho Spirantho August 2014 Hardware
  • Great to be back....and with fun to comeHi all, 1982: I bought a new 16k issue 2 in 1982, eventually got microdrives and a dktronics keyboard (version 1). Built a home made eprom programme…

    ... mount parts (except for the ULA which will be the original ...
    IanJ IanJ August 2014 Announcements
  • Question for ZX81 GurusI have an ISSUE 1 ZX81 with a 2C184E ULA. If I ever need to change it, can I use one of the newer 2C210E ULAs? If I can, are there any other mods th…

    I have an ISSUE 1 ZX81 with a 2C184E ULA. If I ever need to change it, can I use one of the newer 2C210E ULAs?

    If I can, are there any other mods that need done at the same time for it to work?
    rune rune August 2014 Hardware
  • IO Ports (Spectrum)Hi all, Working on a new Spectrum interface card I have the prototype powered up and basically working.......but I want to play with the IO addressi…

    ... they are used by the ULA and the zx printer.......so ...
    IanJ IanJ August 2014 Hardware
  • Spectrum Issue 2 - TR6 ReplacementI've just got my hands on an Issue 2 ZX Spectrum, that needed some repairs. The picture quality after doing a composite modification was pretty shodd…

    ... addresses a problem with the ULA but nothing more specific.
    retrogamemart retrogamemart August 2014 Hardware
  • Short Circuit Damage?Hey Spectrum fans, Currently trying to diagnose what is wrong with my 48K Issue 4B ZX Spectrum. The initial problem was the fact it would not boot -…

    ... message.

    Testing the ULA in another Spectrum board showed ... the ULA worked fine.

    I ...
    Tekno Venus Tekno Venus August 2014 Hardware
  • Better arrangement for video memory?While doing some documentation work for the ZX-Uno project, I compared the advantages of the weird layout of the ZX Spectrum against a linear layout.…

    ... , what would happen if the ULA would have arranged the display ... performs better than the original ULA layout, at least for displaying ...
    mcleod_ideafix mcleod_ideafix September 2014 Development
  • 'Interesting' Issue 2 modSo I've been lurking on this forum for a while and I've got to the point where I want to see if I can repair a speccy.. so I bought me a 'broken' one…

    ... /> 2. Could I test the ULA chip in an Issue 3b ...
    blueowl0708 blueowl0708 September 2014 Hardware
  • My attempt to restore the CPU clock signalI know Winston has already got this, but I can't see any thread with details about it. Only wanted to share my (still early) results. I'm not taking…

    ... signal, filling the gaps where ULA stops it, and yet, maintaining ... in sync with the internal ULA and the CPU, without relying ...
    mcleod_ideafix mcleod_ideafix September 2014 Hardware
  • 48k - Why Won't it Buzzzz?Hi WOS ;) I bought a load of Spectrum games off eBay and thrown in for good measure was a 48k 1984 Issue 6a circuit board that I was told was for sp…

    ... ; bars). I've placed the ULA, ROM and Z80 in other ...
    retrogamemart retrogamemart September 2014 Hardware
  • Video fault on issue two ZX boardI've trawled the Internet and drawn a few blanks as to where to look to resolve the fault with my issue two board. I'm hoping a few of you knowledgea…

    ... I hope means that the ULA is all okay. The board ...
    Wiggs Wiggs September 2014 Hardware
<1…17181920212223…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
  • European Software Titles with an English version
    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
    harriusherbartio on April 21
  • +3 Disk drive motor
    AndyC on April 21
  • Celebrity deaths...
    mel the bell on April 20

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