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  • Spectrum FPGA clone with HDMI video output by Jozsef LaszloThis clone is based upon the ULA core I wrote for opencores.org . It features a scandoubler and HDMI conversion engine. Jozsef has found that a 28MHz…

    ... clone is based upon the ULA core I wrote for opencores ...
    mcleod_ideafix mcleod_ideafix July 2013 Hardware
  • Issue 2 black paper white borderGot an issue 2 here that has a 6c001e ULA, no cockroach, no transistor mod (although you can clearly see on the top of the z80 and on some legs, some…

    ... here that has a 6c001e ULA, no cockroach, no transistor mod ...
    Macc Macc July 2013 Hardware
  • Zero 0.6I'm pleased to announce that I've released Zero 0.6. There are some comprehensive changes in this release including moving to .Net 2.0, removing Slim…

    ... mode (Scotty, Arm73).
    - Fixed ULA Plus mode being disabled in ...
    Arjun Arjun July 2013 Emulators
  • Roger Jowett?Had this email to my ebay account, bearing in mind I had already replied that I only had 2 microdrive connectors left and I dont have any of the othe…

    ... info on these?
    spectra ula+ zx prism...


    Macc Macc July 2013 Sinclair Miscellaneous
  • The Spectrum Resuscitation ThreadKicking off this thread as a place where people who are fixing/restoring Spectrums (or indeed any other piece of related hardware) can show off their…

    ... the board, originals were socketed). ULA and CPU had also been ...
    balford balford July 2013 Hardware
  • 20-column multicolour: a half-baked ideaI was writing an email reply to one Mr Jowett about multicolour routines, and in that way that explaining something to someone else makes you think "…

    ... just before the ULA reaches them. While the ULA is busy ... row down. While the ULA is rendering that first pixel ... byte as soon as the ULA has passed it, and ... and finish just before the ULA catches up with us at ... fifth line, where the ULA caught up and redrew the ...
    gasman gasman July 2013 Development
  • Issue 2 crashes after about 30 minsHi Guys, I have an Issue 2 zx spectrum that seems to get graphic corruption after about half hour of playing, then finally falls over and crashes. …

    ... this anyway? Is there any heatsink type mod for this?
    gazj82 gazj82 July 2013 Hardware
  • Pimping an Issue 4SSo theres this 4S I have, its been a pain in the backside for ages, this and that going wrong then I stupidly broke it properly by inserting a keyles…

    ... to replace the regulator and heatsink, new transistors in TR1 and ...
    Macc Macc July 2013 Hardware
  • ZX Spectrum Pre-regulator DesignCarrying on from the "[URL="http://www.worldofspectrum.org/forums/showthread.php?t=44486"]Issue 2 crashes after about 30 mins[/URL]" thread... [QUOT…

    ... BD437 Rapid 81-0710
    Heatsink for TR1
    R1 ....... 68 ...
    1024MAK 1024MAK August 2013 Hardware
  • ULAs interchangeable across issuesHi all, Now that I'm retired, I'm looking again at 8 bit computing :) I'm attempting to revive a spectrum 48K. I'm going to swap chips in/out from…

    ... issue ?

    Should a ULA from an issue 6A work ... />
    If retrofitting a newer ULA, do you have to undo ...
    DenisM DenisM August 2013 Hardware
  • 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
  • Reading Swift Disc ContentHello All. I was the proud owner of a ZX Spectrum 128k+ (the heatsink model) as a kid and, amongst many peripheral devices during ownership, bought a…

    ... a ZX Spectrum 128k+ (the heatsink model) as a kid and ...
    Ultimate Ultimate August 2013 Emulators
  • Reading Swift Disc ContentHello All. I was the proud owner of a ZX Spectrum 128k+ (the heatsink model) as a kid and, amongst many peripheral devices during ownership, bought a…

    ... a ZX Spectrum 128k+ (the heatsink model) as a kid and ...
    Ultimate Ultimate 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
  • 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
  • First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…

    ... , nearest voltage - 105C near the heatsink etc.

    All i ...
    Edge Edge October 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
  • Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…

    ... two photos (with and without heatsink) to
    [URL="http://schombi ...
    schombi schombi 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
<1…22232425262728…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

HitBox

Word Docs Hits
heatsink 1.2K 1.7K
ula 7.3K 13K

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