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  • Issue 2 issue (...)Just acquired an issue 2 Spectrum 48 K, selled as working board, not working keyboard. Before testing it with a psu I opened the case and discovered …

    ... a board (that with 5c112 ula) is the same on all ... the 2 board without any fix, any great risk for this ...
    Cignale Cignale July 2010 Hardware
  • Cant DecideI have had a lot of spectrums in my time from the 16k to the +3 and as we all know they all have flaws. I am thinking about buying another and wanted…

    ... TC2048 is EAR path to ULA that was changing with each ... external.[/QUOTE]

    Or fix it up to use full ... decoding. There is no ULA in the TC2048. It's ...
    chev chev August 2010 Hardware
  • Speccy repairs?I've finally got round to testing all the various Spectrums that I seem to have accumulated over the years and discovered that "my" two machines (i.e…

    ... to the left of the ULA until the colours are right ... : bad keyboard membrane (trivial to fix, since brand new ones are ... /> I've never had to fix a +2 before, but again ...
    Winston Winston August 2010 Hardware
  • The Sadness of my Decaying Speccies.I've been avidly collecting ZX Spectrums since the late 90's and whilst at the time of the late 90's and early millennium my Spectrums and associated…

    ... about 2 years it died (ULA) although it was never 100 ... (despite my best efforts to fix back then, no internet resources ... shortly after the warranty period (ULA again, the square chip) so ...
    spider spider September 2010 Sinclair Miscellaneous
  • The Sadness of my Decaying Speccies.I've been avidly collecting ZX Spectrums since the late 90's and whilst at the time of the late 90's and early millennium my Spectrums and associated…

    ... to +12v). Fortunately, the Ferranti ULA turns out to be quite ... in a bit of a fix today. I suspect some day ...
    Winston Winston September 2010 Sinclair Miscellaneous
  • Do ULAs die?Thought I'd start this thread as people often think their ULA is dead, when it's actually the RAM or power circuits. Searching the forum in the futur…

    ... is not a 'how to fix my broken Spectrum" plea but ... died, some people have said ULA, others RAM, me I haven ... have thought the +3 ULA was robust as it was ... that it could be my ULA from the above description? ... from a +3 when its ULA does die? (sensible answers only ...
    ASM ASM October 2010 Hardware
  • Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…

    ... !!! They really could do to fix that issue as an absence ... or 1 used at the ULA correctly would be welcome :)
    Fred Fred November 2010 Sinclair Miscellaneous
  • What Spectrum to choose?Hi i'm new to the Spectrum. I read 'bout it in CDA (Polish game magazine) and watched LGR review of the 48k and it REALLY interested me. What model m…

    ... a new Z80 processor or ULA, among other things.

    fix with a modification. I haven ...
    Alien 8 Alien 8 November 2010 Hardware
  • What Spectrum to choose?Hi i'm new to the Spectrum. I read 'bout it in CDA (Polish game magazine) and watched LGR review of the 48k and it REALLY interested me. What model m…

    ... I attempted to fix, with some success back then. ULA eventually died ...
    spider spider November 2010 Hardware
  • Microdrive faultHi, After a chat with "Winston" at the R3PLAY show I have been able to fix my 48k spectrum faulty M1 signal. My problem with the microdrive is int…

    ... I have been able to fix my 48k spectrum faulty M1 ... the outputs on the IF1 ULA :(

    In other words ...
    guesser guesser November 2010 Hardware
  • What model next ?Hi All I already have two 48k rubber kyed 48k Spectrums and a Grey +2 What to get next. ZX Spectrum + ZX Spectrum 128 Toast Rack ZX Spectrum +3

    ... being completely trashed by the snow effect.[/QUOTE]

    ... version and work correct, no snow:
    [url]ftp://ftp. ... in internal structure (equations). Raining/snow effect will fixed if RFSH ... info about new GAL16V8 for fix ZX128/+2 memory layout (as ...
    velesoft velesoft December 2010 Hardware
  • What model next ?Hi All I already have two 48k rubber kyed 48k Spectrums and a Grey +2 What to get next. ZX Spectrum + ZX Spectrum 128 Toast Rack ZX Spectrum +3

    ... in internal structure (equations). Raining/snow effect will fixed if RFSH ... info about new GAL16V8 for fix ZX128/+2 memory layout ( ... /OUT instructions)
    - disable snow effect(raining) on videoram
    Snow effect in videoram is fixed ...
    velesoft velesoft December 2010 Hardware
  • Upgrading 16k MemoryHi All I have a fully working issue 2 16k spectrum and a broken issue3 48k spectrum (It's showing the black and white bars and some flashing blocks)…

    ... maybe not (between Z80 & ULA). When missing, you can check ... ULA might still be working & perhaps it's easy to fix ...
    RetroTechie RetroTechie December 2010 Hardware
  • New game coming soon: PhaetonI have thought that I'll announce it now to build some anticipation ;) I'm almost ready with my new Spectrum game called [B]Phaeton[/B]. It is a g…

    ... clearing and drawing sprites while ULA draws bottom border. This way ... with intro, cheats and Pentagon fix... You have my blessing guys ...
    Ralf Ralf December 2010 Games
  • 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…

    well no. I got other ZX48K to play with.
    also got another broken one, so I'll try to fix that.
    Anyway, it won't be easy to desolder the ULA PCB.
    orange orange January 2011 Hardware
  • zx81 rf outputHi All I'm not sure if this is an appropriate forum for the zx81, however I'll ask anyway;) I've connected my zx81 up to a mid 90's color tv. I can…

    ... describe is due to the ULA used in the ZX81 - there ... was a later ULA which fixed this issue, although ... motherboard, so not an easy fix).
    rwap rwap January 2011 Hardware
  • Testing memory/transistors etc with multimeterAnyone have a rough guide to show how to do this properly? Im using the diode setting on the multimeter to test various components, im touching the b…

    ... to fix em but unless it's lower ram or ula I ...
    hedge hedge January 2011 Hardware
  • Was the +3 a missed opportunity?I just wanted to gauge WOS opinion on this. Do people think that the +3 was a bit of disappointment that didn't really advance the hardware as much a…

    ... there as a fix in place of a ULA that never worked ... , the ULA that handles the ...
    Matt_B Matt_B February 2011 Hardware
  • Was the +3 a missed opportunity?I just wanted to gauge WOS opinion on this. Do people think that the +3 was a bit of disappointment that didn't really advance the hardware as much a…

    ... there as a fix in place of a ULA that never worked ... , the ULA that handles the ...
    Paddy Coleman Paddy Coleman February 2011 Hardware
  • Newbie question about my unwell Spectrum...Hi - I have had a couple of dud 48K Issue 3 Spectrums in the loft for 20 years or more. One would initialise sometimes but could not be guaranteed t…

    ... membrane, one keyboard faceplate, one ULA, and at least two memory ... still no guarantee that will fix it makes its repair not ...
    weathereye weathereye February 2011 Hardware
  • contended memory...so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct …

    ... /> could anything be done to fix the I/O contention and ... /OUT instructions)[/B]
    - disable snow effect(raining) on videoram
    velesoft velesoft April 2011 Hardware
  • Spectrum +3 Help pleaseI bought a +3 from a bootsale today, and when I got it back it didnt work (shock!) However after working out the +5V line on the PSU line was about …

    ... Eproms ?2.52 + ?1.30 pnp
    [img]http://i3.ebayimg ... 27C256B-12F1 (Qty10) ?11 free PnP
    [img]http://i.ebayimg ... CPU with one from a ULA death 48k everything worked fine ...
    Zetr0 Zetr0 April 2011 Hardware
  • Tape preservation toolsIn the latest MakeTZX thread of doom several people said that it would be good to have active development of tape decoding tools. I needed tape file…

    ... know this issue I'll fix this so that your existing ... /> I need to try the ULA stuff on Zero, I quite ...
    Andrew Barker Andrew Barker April 2011 Emulators
  • Code Masters CD on ebay[url]http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=330553816486&ssPageName=ADME:X:BOCOR:GB:1123[/url] He's selling it for ? 99.99 but accepts …

    ... machines the convertor cables to fix the 9 pin back to ... get the impression that the ULA is relatively prone to getting ...
    zub zub May 2011 Sales
  • ANN: Spud v0.210Ok guys, I've made you wait long enough. Here's a new version of Spud for you to love, hate, ridicule or ignore. [URL]http://bit.ly/iAhkXY[/URL] …

    ... is when I open the ULA pallette editor and click alternately ... quite work properly, I'll fix that but luckily no-one ...
    rich_chandler rich_chandler May 2011 Emulators
  • So what is the best Spectrum?I've had a search and even though i can remember a similar thread somewhere I'll twist it a bit. Whats the best "unmodified" Spectrum? (modification…

    ... modified ROM that attempts to fix a bug in the arithmetic ... ASIC-ish version of the ULA in the original ZX81. The ...
    chev chev May 2011 Sinclair Miscellaneous
  • 48k dots appear but not with CUB monitorToday I tried out an issue 3 and an Issue 2 with the CUB monitor, to my surprise they both worked flawlessly, now before when I tried them on any oth…

    ... usual, but as the ULA was getting hotter, more ... prototype-or-the-importance-of-ula-cooling[/url][/QUOTE]
    ... to do with the ULA generating timings for 4116 ... and their ula's had a timing fix which was ... remember this referenced in the ULA book)

    ...
    spodula spodula June 2011 Hardware
  • Getting marriedI'm getting married on 18 June! My lovely partner and I are really excited ! Wish me luck folks! :)

    ... was and that the only fix nowadays is via emulation coz ... understanding the Spectrum Z80 and ULA as much as our Joffa ...
    Hercules Hercules June 2011 Chit chat
  • Spectrum+ fault - lines on boot screen, freezesThe ZX Spectrum+ I bought in the car boot has a fault. When you boot it, it's displaying the Copyright screen, but each character position has a vert…

    ... I got the spare ULA. I tried to fix that one but ...
    Muzer Muzer June 2011 Hardware
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HitBox

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ula 7.3K 13K
snow 1.9K 2.6K
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