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<1…12131415161718…34>
  • Question about ZX81 componentAfter I cleaned and replaced some components (7805, two electrolytic caps) with fresh ones, and replaced the RF board with a composite one, on an iss…

    ... is right next to the ULA the screen was coming back ...
    gtsamour gtsamour December 2010 Hardware
  • Interesting AuctionCheck out the speccy with a 'bank' of LEDs and the Atic Atac Poster. [url]http://cgi.ebay.com/SInclair-ZX-Spectrum-lot-parts-books-ula-feet-etc-/270…

    Check out the speccy with a 'bank' of LEDs and the Atic Atac Poster.

    [url]http://cgi.ebay.com/SInclair-ZX-Spectrum-lot-parts-books-ula-feet-etc-/270675478234?pt=UK_VintageComputing_RL&hash=item3f058406da[/url]
    beanz beanz December 2010 Sales
  • FS: My 48kIve decided to sell my personal, everyday 48k rubber key, reason being ive recently took delivery of another but this has nearly everything on the bo…

    ... ), new membrane and now working ULA in it (as supplied and ...
    Macc Macc December 2010 Sales
  • Ula 6c00ieHi is anyone will to part with 1 or 2 of these for ?10 ea? Ping me I you can help

    Hi is anyone will to part with 1 or 2 of these for ?10 ea?

    Ping me I you can help
    hedge hedge December 2010 Wanted
  • broken 48K, strange screenwell I finally socketed all lower 16K ram chips, (8 of them in a row near corner, not those 4 in two rows) and replaced them with new ones but it did…

    ... is turned on.
    strangely, ULA chip on this 48K is ...
    orange orange December 2010 Hardware
  • Error in the Schematics.Hi, i have been looking at a Speccy 48 PCB, and have figured out that all the Speccy schematics in the archive up to and including Rev 4a, contain an…

    ... to pin 37 on the ULA, not pin 27 as shown ...
    spodula spodula January 2011 Hardware
  • ZX Spectrum 48K,issue two - can't get it repairedI have an issue 2, which has some weird very small PCB hanging over the Z80. Some wire go to various places on the big PCB, two go to connections 36 …

    ... 36 and 37 of the ULA.

    Replaced TR4 and ... say:
    Z80 = working
    ULA = working (type is 5C102E)
    georgedb georgedb January 2011 Hardware
  • Not worth reading really - unless you have some spare time(Mods if you want to move it please do it does have a sort of hardware theme and a couple of recommendations at the end :) About two years ago now I…

    ... proud owner of a MicroDrive ULA - not many can say that ... on screen is nearly always ULA related. Anyway being into IT ... speccy had died was the ULA/lower ram, so what would ...
    hedge hedge January 2011 Hardware
  • ZX Spectrum 48K, issue - works fine till it gets hot (?)ZX Spectrum 48K, issue 2, works just fine, tested with Winston's diag board. At a certain moment in time however, it seems to run hot and stalls. Whe…

    ... .

    Voltage regulator and ULA both get very hot, but ...
    georgedb georgedb January 2011 Hardware
  • Iphone/Ipod touch gaming threadThought i would start a thread for this little gadget. I havent been this excited since the Speccy years. Never was keen on an Iphone, dont want a …

    ... Dreams, Warlock of Firetop mountain, Arkanoid, Crystal Maze.

    Racing ... ]

    Bejeweled, 3d brick (Arkanoid), ifruitBomb2 (Great fruit machine simulator ...
    psj3809 psj3809 January 2011 Chit chat
  • Issue 6a black and white problemGot a 6a board, no colour, black and white striped border (when it should be blue or red), and the display visibly judders left and right slightly ev…

    ... ?

    Composite modded, replaced ULA, checked memory, could this be ...
    Macc Macc January 2011 Hardware
  • Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…

    ... way of determining if the ULA or the CPU is reading ... signals are provided via the ULA, its a pain), Alas, its ...
    spodula spodula January 2011 Hardware
  • How the spectrum generates the video from ramHi everyon, I know that most people here allready know this but i think i found out how the spectrum acctually dispalys stuff and why the LD x, (HL)…

    ... order ram (> 16K) the ULA (or PIC in my case ...
    Robin Robin January 2011 Hardware
  • FA: Some more Stuf on eBay (denied games too)Hi there, some new Stuff for Speccy and ZX81 this week on eBay: [url]http://cgi.ebay.at/ws/eBayISAPI.dll?ViewItem&item=110639204518[/url] (ZX ASZMIC …

    ... Computer from 1978 and Tournament Arkanoid Board, but it is off ...
    LCD LCD January 2011 Sales
  • Collection of Spectrum 48K Games (49 in total)I have quite a few Spectrum 48K games (49 in total) wanting to go to a good home for sale. All in original boxes, instructions etc. Some are multi p…

    ... games) - Rastan, Slap Fight, Renegade, Arkanoid, Flying Shark, Bubble Bobble, Legend ... Of Kage, Arkanoid Revenge Of Doh
    Magnificent ...
    Stag77 Stag77 January 2011 Sales
  • Fully integrated ZX+Hi, I just want to show some inspiration for integration HW to ZX+ case ;-) - ZX48 issue 3 board, without all parts regarding video generating (pa…

    ... /> - scandoubler which catch data during ULA VRAM access
    - Divide with ...
    willcz willcz February 2011 Hardware
  • ZX spectrum +2 issue3 (gray) videoout problemHi! Have distorted flickering image on ZX spectrum +2 gray issue3. RGB connection thru sony CXA rgb->svideo coder (Good quality! but flickering) [ur…

    ... /plus2sch.png[/url]

    ULA sync malfunction?
    nikor4 nikor4 February 2011 Hardware
  • Smooth (vertical) scrolling on ZX SpectrumI was just thinking about this. You know, you have systems like Atari 2600 or Sega SG-1000 that have no hardware scroll, but they have games that sti…

    ... to do the tricks within ULA display time.

    I ...
    maiki maiki February 2011 Games
  • Is ZX80 really "Z80 only"?The Spectrum has ULA to generate video display. Does the ZX 80 have any kind of processing chips apart from Z80? How is the video display generated o…

    The Spectrum has ULA to generate video display. Does the ZX 80 have any kind of processing chips apart from Z80? How is the video display generated on ZX80? How does it compare to Atari 2600's CPU + TIA combo?
    maiki maiki March 2011 Sinclair Miscellaneous
  • ZX Spectrum Woes...In my endeavours to get my second Spectrum (Issue 3) working I have replaced the CPU, memory and lower ram. I have fitted sockets for the CPU and me…

    ... signal provided by the ULA is the 14MHz ULA clock signal divided ... shows pin 32 of the ULA as high and pin 6 ... wave. Pin 39 of the ULA is permanently high, although the ...
    weathereye weathereye March 2011 Hardware
  • Memory upgrade for ZX Spectrum 16/48This is external memory upgrade for ZX Spectrum models with 16kB ram. Can be connect also to 48kB models, but need remove 8 dram chips (from sockets …

    ... external ram pages are fast (ULA no slow down CPU and ...
    velesoft velesoft March 2011 Hardware
  • Faulty +2AHi! I have a +2A from a friend which is not working. I recently made a composite video output for it, using a small circuit from Sami Vehaama. When …

    ... ]

    I think the ULA is faulty... but it could ...
    Hernán Pablo Álvarez Hernán Pablo Álvarez March 2011 Hardware
  • Is this the infamous Dead CockroachCan anyone help me. I have an issue two spectrum that I want to list on ebay, but I want to know if this has the dead cockroach ULA fix. I would have…

    ... this has the dead cockroach ULA fix. I would have presumed ...
    flashbackgames flashbackgames March 2011 Hardware
  • Does the usual composite mod damage Speccies?Hi people, Just browsing eBay -as you do - and I noticed this auction: [url]http://cgi.ebay.co.uk/ZX-SPECTRUM-48K-GOOD-COND-COMPOSITE-OUTPUT-SINCLAI…

    ... usual "whack the line from ULA straight to the modulator output ... popular, because by wiring the ULA straight to the output (and ... ) you can apparently damage the ULA.

    Is this actually ... damaging my oh so precious ULA by doing this?
    Spirantho Spirantho April 2011 Hardware
  • Brief report about RetroEncounterAnother April... another retro event! (Firstly sorry for the quality of the photos, owing to not being able to find my camera battery before leaving …

    ... of an external FPGA-based ULA+ implementation) it was finally time ...
    Winston Winston April 2011 Sinclair Miscellaneous
  • ZX Spectrum 48k issue 3b power problem?Hi :) I was lucky enough to find a couple of ZX Spectrums at a car boot sale yesterday. I spent the evening fiddling about with one (issue 2) and t…

    ... up at all, including the ULA. Im wondering if this is ...
    vinnivee vinnivee April 2011 Hardware
  • ZX Microdrive errorToday I started some ZX Microdrive having in the closet, and only one has given me problems with the typical [B]Microdrive Not present[/B] error. As …

    ... there is no problem of ULA and the motor starts, I ...
    Mobutu Mobutu April 2011 Hardware
  • Amstrad Toast Rack?Hello there my fellow WoS'ers Recently I have been very lucky with my brother giving me a Sinclair Spectrum 128K+ (Toast Rack), it needed a little a…

    ... servicing, I noticed that the ULA is [B]Amstrad[/B]
    ULA, arguably suggesting a closer-tie ... are known to have Amstrad ULA's in some models.
    Zetr0 Zetr0 May 2011 Hardware
  • Grey+2 displays cyan instad og bright 0 whitehere's a weird one one of my grey+2's displays cyan instead of white, yet bright 1 white is ok I swapped a ULA out of a machine that is ok and it's…

    here's a weird one

    one of my grey+2's displays cyan instead of white, yet bright 1 white is ok

    I swapped a ULA out of a machine that is ok and it's the same

    this comes through both rf and scart, any ideas?
    BiNMaN BiNMaN May 2011 Hardware
<1…12131415161718…34>

Latest Posts

  • 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
  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade 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
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
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  • +3 Disk drive motor
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