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<1…891011121314…34>
  • 48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …

    ... /> Altogether that makes six versions of the Spectrum ULA.

    5C102E ...
    rga24 rga24 March 2014 Hardware
  • 48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …

    ... /> Altogether that makes six versions of the Spectrum ULA.

    5C102E ... left like the 6C001E-6 ULA? The 5C112E screen matrix looks ... />
    For the changes to ULA I/O port ($FE) reads ... of the imperfections of the ULA (non-centred screen, etc.) but ...
    zub zub March 2014 Hardware
  • Joystick Interfaces on +2AJust found out that my DK'Tronics joystick interface doesn't want to play with my +2A (black). The Kempston port works OK, but not the Sinclair port…

    ... will be determined by the ULA. Actually, I'm not sure ... , there needs to be two versions of every software release anyway...
    joefish joefish April 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…

    ... to pin 36 of the ULA and the other to pin ... two (or miaybe even hgher versions?) thay can be interchanged?
    georgedb georgedb May 2014 Hardware
  • Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…

    ... . However, the screen has duplicate versions of whatever is on the ... high voltages produced by the ULA when a corresponding address multiplexer ...
    Zorn Zorn May 2014 Hardware
  • New Game: Ninjajar!Yes, it's here! We had some late hour problems with +2A models and had to switch to a machine code loader (as the game takes up the whole 128K, even …

    ... />
    I'm uploading updated versions with a couple of bugs ... sorted out and the ULA snow problem reduced to a ...
    na_th_an na_th_an May 2014 Brand new software
  • Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…

    ... tape and I found some ULA snow in the options menu ... memory, there's still that ULA snow effect there, but, after ... .

    However, the digitised versions of the tape here preserved ...
    Neil Parsons Neil Parsons June 2014 Games
  • Spectrum 128 malfunctioning with DIVMMCI recently got myself a spectrum 128 (toastrack) and a DIVMMC card so I could load games from it. It all works fine until it has warmed up and then t…

    ... voltage regulator followed by the ULA. Other chips such as the ... Spectrums (rubber key and Plus versions).

    So what is ... , use a heatsink on the ULA. Most of the chip as ...
    1024MAK 1024MAK June 2014 Hardware
  • ZX Spectrum Clock Signal Restorer Circuit[SIZE=5][U][B]ZX Spectrum Clock Signal Restorer Circuit[/B][/U][/SIZE] The circuit below is an experimental circuit. It has only been "tested" using…

    ... The /clk signal from ULA is coupled using 1 kOhm ... /clk output of the ULA. Therefore the level drops ... heatsink computers and the Amstrad versions +2, +2A/B, +3 ... . The Amstrad versions have real TTL level at ... big load at the /clk ULA output.

    ...
    ingo ingo June 2014 Hardware
  • Why is the scene less participative now? or at least, a bit hollow...I have found out in the last months, that despite of having a huge number of new games with a huge quality, a great number of hardware projects, and …

    ... , and is also creating international versions of various typefaces. Einar ported ... Chris Smith reverse engineered the ULA and found he had enough ...
    chev chev July 2014 Sinclair Miscellaneous
  • Clashbasher a new interface to reduce colour clashI've been working on this for a while now. [IMG]http://markamy.uwclub.net/cauldron.JPG[/IMG] Basicly its an add on for a 48k spectrum, which reinte…

    ... connector. I plan to reimplement ULA+ and the every ink pixel ... work out how to produce versions of the SP0256-AL2 allophones ...
    Basher Basher August 2014 Hardware
  • ZX81 + 16k RAM Pack + Original PSU... What's it worth?Hey guys Got my ZX81 this morning its in excellent condition.. [IMG]http://s30.postimg.org/iwetzxku9/IMG_20140818_142443.jpg[/IMG] However, my T…

    ... -CCB

    Some versions of the ULA seem to need a ...
    rwap rwap August 2014 Sinclair Miscellaneous
  • Ben Heck modifies a Zee X Spectrum.Gahh, one of the differences between Americans and Europeans right there in the title. Anyway, we know better ;) ...and this isn't about that anyway.…

    ... is a Z80 CPU, a ULA, a ROM or EPROM containing ... other heavily modified or rewritten versions.
    1024MAK 1024MAK August 2014 Hardware
  • Ben Heck modifies a Zee X Spectrum.Gahh, one of the differences between Americans and Europeans right there in the title. Anyway, we know better ;) ...and this isn't about that anyway.…

    ... is a Z80 CPU, a ULA, a ROM or EPROM containing ... other heavily modified or rewritten versions.[/QUOTE]

    Well then ... Sinclair didn't produce any versions of Sinclair BASIC for Z80 ...
    chev chev August 2014 Hardware
  • Ben Heck modifies a Zee X Spectrum.Gahh, one of the differences between Americans and Europeans right there in the title. Anyway, we know better ;) ...and this isn't about that anyway.…

    ... Sinclair didn't produce any versions of Sinclair BASIC for Z80 ... in my earlier post, after "ULA" add: and for the Amstrad ...
    1024MAK 1024MAK August 2014 Hardware
  • ZX81 and Analogue TVsI recently bought a really nice ZX81 on ebay in amazing condition, but I'm having issues tuning in an old analogue TV to lock onto the signal. I und…

    ... boards had sockets for the ULA chips.

    ... are socketed. Sometimes the ULA, the Z80 CPU and ... br /> There are three ULA chips, two types are ... Both this ULA and the earlier 2C158E ULA generate a ... there are only two different versions of the code. The ...
    1024MAK 1024MAK September 2014 Hardware
  • Kempston joystick detectionIn both [url="http://skoolkit.ca/disassemblies/manic_miner/asm/34252.html#34332"]Manic Miner[/url] and [url="http://skoolkit.ca/disassemblies/jet_set…

    ... that some modern joystick interface versions allow extra fire buttons on ... happened to be on the ULA / "lower" RAM bus during the ...
    1024MAK 1024MAK October 2014 Hardware
  • Spectrum preservation/clean up questions.I&#8217;m sorting out my 5 Spectrums trying to make them look a bit better, and to package them up how they should be, and to get them to be reliable…

    ... versions of RGB cables which used the Sync pin on the ULA ... blanking signal make the ULA run substantially hotter, adding ... to stress on the ULA.
    15) Yes, ... desolder the ULA socket and solder the ULA directly ... from Maplin). The ULA wasn't designed to ...
    Spirantho Spirantho November 2014 Hardware
  • Please explain Spectrum FPGA-clones to meI've been using the great ZXDS-emulator on the DS XL so far, which is great. But I kinda missed toying around with hardware. I've tried bidding on a …

    ... signals. All of these versions might have been functionally identical ... ways and the first versions that went into production ... guarantee there were previous versions that would have been adequate ... other versions were merely pretending to be a Spectrum ULA or ...
    Alcoholics Anonymous Alcoholics Anonymous November 2014 Hardware
  • Tinkering with DMASo, some afternoon tinkering... [img]http://photo.alioth.net/tmp/dma_small.jpg[/img] The purpose of this all is to see what's possible using the Xi…

    ... speccy though you have the ULA in the picture too and ... CPU clock, and when the ULA gates the clock, it works ... right so the various different versions of the logic that controls ...
    Winston Winston November 2014 Hardware
  • Please explain Spectrum FPGA-clones to meI've been using the great ZXDS-emulator on the DS XL so far, which is great. But I kinda missed toying around with hardware. I've tried bidding on a …

    ... t suddenly 'become' the Spectrum ULA. An FPGA doesn't spontaneously ... do the video). Without the ULA, the logic would have ... logic elements that the 1980 ULA had are not the ... perform functionally identical to previous versions.

    [quote]
    ...
    Alcoholics Anonymous Alcoholics Anonymous November 2014 Hardware
  • What is the Speccy? exUSSR edition.In exUSSR 8 years ago have been solved all these issues, and developed a General opinion. All who do not agree with this opinion, are incompetent peo…

    ... reverse-engineered clone of the ULA. Main differences where slightly improved ... the Czerweny and Microdigital official versions like the Timex models?[/QUOTE ...
    Einar Saukas Einar Saukas November 2014 Hardware
  • Detecting flash mode inversionsIs is possible to detect with certainty when flashing characters change from normal to inverted and vice-versa?

    ... it doesn't reset the ULA's FLASH cycle after a ... ? Whichever one of the various versions I try I don't ... " and this coincides with the ULA starting its 16-frame inverse ...
    Battle Bunny Battle Bunny November 2014 Development
  • 128K Toastrack - Missing coil?Hiya! I recently acquired a fleabay 128K, and before putting power through it, I thought i'd open it up to see if anything looked obviously wrong (e…

    ... I see with an AMSTRAD ULA. I'm asking because Miles ... !) that the very last toastrack versions were produced by AMSTRAD and ...
    geosiou geosiou December 2014 Hardware
  • 128K Toastrack - Missing coil?Hiya! I recently acquired a fleabay 128K, and before putting power through it, I thought i'd open it up to see if anything looked obviously wrong (e…

    ... I see with an AMSTRAD ULA. I'm asking because Miles ... !) that the very last toastrack versions were produced by AMSTRAD and ... in 85/86 has Amstrad ULA. I remember that it broke ... time, and I found this ula.

    For this reason ...
    Jose_Leandro Jose_Leandro December 2014 Hardware
  • ZX81 ULA Swap questionHi Can someone remind me if all three versions of the ZX81 ULA are electrically compatible? I just bought a ZX81 with an older ULA, so it lacks the …

    ... to throw away the old ULA. I know the dark screen ... malfunctioning. The two older versions of the ULA are just not designed ... that Zeddy has the 2C210E ULA, so I am guessing that ... after I swap out the ULA.

    So did the ...
    memrah memrah January 2015 Hardware
  • Dan Dare 2 is a bad game ... or is it?I am a huge fan of Dan Dare 1 (one of the few games I can complete on Speccy) and I really like Dan Dare 3. I absolutely hate Dan Dare 2. It looks a…

    ... />
    There are two Ula plus versions (second one is my humble ...
    Pegaz Pegaz February 2015 Games
  • Features that are still wanted in Spectrum emulation.Features that are still wanted in Spectrum emulation. 4 USB joystick/gamepad input for real multiplayer games - Yes, Bomb Munchies.... - Sinclair 12…

    ... frame has elapsed so the ULA has refreshed the display. Although ... display what position is the ULA (the electron beam actually) redrawing ... will include this in next versions ;)
    chernandezba chernandezba February 2015 Emulators
  • Spectrum 48K Ferranti ULAIs there anywhere to get hold of the ICs in the subject? Martin

    Just found 2 ULAs (5C112E-3 versions from an Issue 2) on eBay. ?18 each

    [url]http://www.ebay.co.uk/itm/Ferranti-Spectrum-ULA-5C112E-3-issue-2-Spectrum-/321673024457?pt=LH_DefaultDomain_3&hash=item4ae534d3c9[/url]
    Tekno Venus Tekno Venus February 2015 Hardware
  • Interface 1 putting me in 48kHi All, I have a 128 toasty with interface 1 connected to a PC via serial. If I save a basic program using 'SAVE *"b" LINE 10', all is well. If I …

    ... (equipped with different IF1 ROM versions Ed1 and Ed2), all of ... ISS3 grey +2 the CPU, ULA, ROM, and the multiplexer chips ...
    jimre jimre February 2015 Hardware
<1…891011121314…34>

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