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  • August sales[COLOR="Blue"]I have about everything listed here in stock. But some of it must be made ready (with custom wishes). [B]Buying directly will save you…

    ... ://benophetinternet.nl/hobby/vanmezelf/sales/ula.jpg[/IMG]
    [B]48K ... ULA (different types for issue 2 ...
    bverstee bverstee August 2013 Sales
  • Adding a pause key to ArkanoidHaving rediscovered the simple pleasure of playing 1980s games on genuine 1980s hardware, I've also remembered that emulation can provide a feature m…

    ... requires a read from the ULA port (0xFE) with the high ...
    stephenw32768 stephenw32768 August 2013 Games
  • Issue 4A black paper, white borderJust had one of these through, nice yellow pcb! Everything but the ULA soldered in. On power up I get black paper, white border and some intermitten…

    ... yellow pcb! Everything but the ULA soldered in.
    On power ...
    Macc Macc August 2013 Hardware
  • Corrupt paper on zx spectrum 48kHi. When I power up my spectrum (issue 3) I get the light grey border, but the paper is black and it switches between thin red vertical lines and thi…

    ... . Could it be a defect ULA, or one of the RAM ...
    zxviking zxviking August 2013 Hardware
  • spectrum issue 6a oddityMorning everyone Bought a speccy (rubber key) from ebay in near mint condition - couldn't tune in on analogue particularly well so did the comp mod …

    ... />
    I was thinking bad ULA but not sure - if so ...
    actualreality actualreality August 2013 Hardware
  • Spectrum 48k video and keyboard issueHi all, few days ago I experimented with battery supply for my speccy (48k issue 2), and I was measuring the voltage and how much current it used. A…

    ... hope it's not the ULA because replacements are hard to ...
    dimewos dimewos September 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…

    ... />

    [U]ZX Spectrum ULA differences[/U]
    As you ... +2 use the same ULA, but this ULA is very different from ... the 48K ULA.

    Allthough the toastrack ... connector comes directly from the ULA.
    The Z80 gets the ...
    bverstee bverstee September 2013 Hardware
  • Ben Versteeg's September sales[COLOR="Blue"][B][SIZE="6"]Add-ons[/SIZE][/B][/COLOR] [IMG]http://benophetinternet.nl/hobby/vanmezelf/sales/line.jpg[/IMG] [IMG]http://benophetinter…

    ... [/IMG]

    [B]48K ULA (different types for issue 2 ...
    bverstee bverstee September 2013 Sales
  • Faulty +3Hi all Hoping this isn't the 40077 dead on my +3 but....... [IMG]http://www.darrenwileman.co.uk/SPEC/Plus3.jpg[/IMG] Tried the following in anothe…

    ... /> Hoping this isn't the 40077 dead on my +3 but ...
    actualreality actualreality September 2013 Hardware
  • Another broken SpeccyHi all I have been given another ZX Spectrum, this time it has a really odd problem as you can see in the video: [URL="http://youtu.be/ZOSiBEYQD7w"…

    ... , works fine
    Checked the ULA on another Spectrum - all good ...
    actualreality actualreality September 2013 Hardware
  • Toastrack trouble[IMG]http://i44.tinypic.com/11lq7id.jpg[/IMG] Sorry about the picture size, cant figure out how to make it smaller! Anyway, the pic says it all, th…

    ... (that does work as intended). ULA gets extremely hot after about ...
    Macc Macc October 2013 Hardware
  • eBay 128K Spectrum RGB cables overheat the Spectrum!?Hi everybody, For a long time I've wondered why Spectrum 128K Toastracks were overheating when using my Retro Computer Shack RGB SCART cable. Today …

    ... the composite SYNC! The poor ULA is driving the RGB switching ... is too much for the ULA, and it gets too hot ... /> You can tell if the ULA is over-stressed by measuring ... pin 23 (CSYNC) on the ULA. It should be about 3 ... is my Spectrum 128K's ULA, and that's too high ...
    Spirantho Spirantho October 2013 Hardware
  • I've had better nights...So I got a broken issue 2 today, case in good nick but the diags board showing multiple failures in both lower/upper RAM. Never mind, good as a spare…

    ... random fill test. Replacing the ULA gets rid of the patterning ... other 4116's and a ULA... :-o

    Looking back ... :x plus the 5C112E-2 ULA's only good for issue ...
    balford balford November 2013 Hardware
  • Simulate errorshi, i would like to know if its possible to simulate errors on an emulator? Like bad memory or bad ULA. Salut

    hi,

    i would like to know if its possible to simulate errors on an emulator?
    Like bad memory or bad ULA.
    Salut
    landex landex November 2013 Emulators
  • Another way to add audio input on a +2 - No more low level sound problem !Hi all, Last week, with 3 friends, we participated to a modelism / games / hobbies meeting, and we made a retro computing stand... (big succes, I'll…

    ... ) that proceeding that way, the ULA is protected.
    The Speccy ...
    bugpat bugpat November 2013 Hardware
  • ZX Interface 1 ULAs FOUND !!Thanks to Ian Gledhill (of Mutant Caterpillar) we have now acquired a stock of replacement ZX Interface 1 ULAs. These are new old stock and have a d…

    ... a later version of the ULA.

    See [url]http ... /%2ARARE%2A-ZX-Interface-1-ULA-Chips---LA15-312-3481[/url ...
    rwap rwap November 2013 Sales
  • ZX Spectrum 48k - no CLK signalHello I'm trying to repair ZX Spectrum 48 mainboard issue 3B. When i check signal with oscilloscope on X1 or on ULA pin 39. I get stable 2V no clock…

    ... oscilloscope on X1 or on ULA pin 39. I get stable ... no clock pulses. Can broken ULA chip be the cause of ...
    gottrek gottrek November 2013 Hardware
  • Ben Versteeg's November sales[COLOR="Blue"][B][SIZE="6"]Almost ready[/SIZE][/B][/COLOR] [IMG]http://benophetinternet.nl/hobby/vanmezelf/sales/line.jpg[/IMG] [IMG]http://benophet…

    ... [/IMG]

    [B]48K ULA (different types for issue 2 ...
    bverstee bverstee November 2013 Sales
  • Spectrum +3e acting up...Hello, Well, my Spectrum +3e is starting to act up. All 48k games load fine but now no 128k games will load :/ In one 128k game, in the beginning r…

    ... there a memory test or ULA test, etc... for the +3 ...
    thomas3120 thomas3120 November 2013 Hardware
  • a few questions1. When will emulators use pc vga capabilities to emulate the uhf tv output accurately including phosphoric delay and crosstalk synchronization 2. W…

    ... hardware interlace like the spectra ula+ or zx prism

    morcar morcar November 2013 Sinclair Miscellaneous
  • Tricky ZX RepairHello guys, This time I put my hands on a very nice Issue 3 16K, upgraded to 48K. To bertter explain "nice", it is absolutely mint, not a scratch on…

    ... .

    Hmmmm... swapped the ULA, but it also worked perfectly ... puzzled. Apart from ROM and ULA, there's nothing else on ...
    Falco-F8L Falco-F8L December 2013 Hardware
  • Black Screen Spectrum 48kWas working ok, it came to me in a Fuller FDS keyboard, I had a nose inside and found a floating power lead connected to the keyboard, I removed that…

    ... />
    Update: Tried another working ULA and it's not that ...
    OttO OttO December 2013 Hardware
  • Interesting 48K failureI thought I'd recount a failure I've not seen mentioned before that I saw tonight while fixing a 48K issue 6 board. The background: The initial fail…

    ... the Z80.
    3. Intermittent ULA fault (easily testable - since the ... IOREQ high thus preventing the ULA from seeing odd numbered I ... was never fixed inside the ULA - TR6 instead became part of ... an NMOS output), causing the ULA to sometimes see spurious IO ...
    Winston Winston December 2013 Hardware
  • MISTER BEEP - the NEW ZX48 album 2014 "Chromospheric Flares"Hi mates. So. Here it is. Something like 2 years after the previous one - here is my new ZX Spectrum album "Chromospheric Flares". [img]http://mi…

    ... (jack) through 1-bit transducer - ULA chip.
    Sometimes it sounds ... of ZX SPECTRUM (jack) through ULA chip - the 1-bit transducer ...
    Mister Beep Mister Beep January 2014 Announcements
  • Using even ports for input?I've been looking for unused ports to use with my clashbasher interface. I understand that the spectrum only considers A0 when decoding its input p…

    ... socket.

    However the ULA is decoupled from the Z80 ... so the resistors between the ULA and the Z80 would be ... between the z80 and the ULA.

    As long as ...
    Basher Basher January 2014 Hardware
  • Which Windows Emulator will support SPECTRA?I want to start crossdeveloping games for SPECTRA, but it is a pain in the ass to save the TAP on USB Stick or SD Card and test them on my eMac SP Em…

    ... .html[/url]
    Everybody supports ULA+ which is still not available ...
    LCD LCD January 2014 Emulators
  • Timex Compute TC2048 loading problems solvedHi everybody, I've just finally fixed a TC2048 that had numerous problems. Once I'd changed all the RAM, the CPU and the ULA (surface mounted, for a…

    ... RAM, the CPU and the ULA (surface mounted, for added joy ... 0.7V threshold that the ULA uses to detect a tape ... .
    So, of course, the ULA just read a logic high ...
    Spirantho Spirantho January 2014 Hardware
  • Issue 2 with 5C102E + cockroach on eBay(Posted here and not sales as it's not mine :)) Came across [URL="http://www.ebay.co.uk/itm/151225493166"]this[/URL] earlier - early Issue 2 board, …

    ... 2 board, complete with 5C102E ULA and dead cockroach. Looks from ...
    balford balford February 2014 Hardware
  • Help with an issue 2Hello friends, Today, sadly, my issue 2 board lost his 5c112 ULA, and on my spares list I only had a 6c one that worked fine after swapping it. Now I…

    ... 2 board lost his 5c112 ULA, and on my spares list ...
    Pluto63 Pluto63 February 2014 Hardware
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Latest Posts

  • Minor British Sports that did become games on the ZX Spectrum
    dmsmith on 11:22PM
  • I bought an accoustic guitar. How do you play it?
    Maroc's Other Projection on 9:55PM
  • Goodbye Z80
    moggy on 9:07PM
  • Happy 40th Birthday to the Amstrad CPC464!
    AndyC on 6:29PM
  • Another Birthday! The Game Boy Is 35!
    dm_boozefreek on 6:17PM
  • I am currently watching.....
    Antiriad2097 on 5:05PM
  • 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
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21

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