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<1…15161718192021…34>
  • converting ZX128 software for SAM COUPESAM COUPE is computer compatible with ZX48 model. Use same ports, same keyboard with compatible membrane, 64kB adress space with possibility connect …

    ... -6.png[/img]

    ZX games with palette ported from ULA ...
    velesoft velesoft June 2010 Games
  • 48 Issue 3b working but very hot ula and cpuSalve to everybody I bought from e*ay an Issue 3b 48k , fitted in a + case. Fixed the keyboard problem with a new keyboard membrane from good Rwap (w…

    ... if the 128+ and grey ULA is getting as hot as ... 14x14x8 made of copper.Only 6 euros per pack (8 heatsinks ... them on every speccy's ula i've got. Really easy ... with the heatsink on the ULA. The heatsink is just 8mm ... on the center on each ULA be sufficient or should i ...
    gtsamour gtsamour July 2010 Hardware
  • speccy colors ajnd pixels and stuffwhat are the speccy colours? specifically the RGB values of them. i suppose could just put a screen in photoshop and work it all out. also how big …

    Having just finished editing the ULA book, I can let you ... . The colours output by the ULA actually change as it heats ... /> 5 = 0 200 200
    6 = 200 200 0
    7 ... /> 5 = 0 240 240
    6 = 240 240 0
    7 ...
    chev chev July 2010 Sinclair Miscellaneous
  • "Sinclair" and "Sinclair Zx" TrademarksPlease, oh please, be patient... I known is a childish and probably stupid question, but.... No way to promote, all of us of WoS interested, a (hop…

    ... -the passion the decode the ULA, the way to decipher the ... respectful of original machine "philosophy", Ula and other circuitry modes designed ... on to your horses! The ULA book has only just been ... SoC.
    5. Cheap!
    6. Should support more than just ...
    csmith csmith August 2010 Sinclair Miscellaneous
  • Developing ZX Spectrum using 8 chipsHello. Sorry, my english is not perfect. I am developing new realising of ZX Spectrum. There are 8 chips in my sch. Central processor and video proce…

    ... frequency 21 MHz - it is 6 times faster then Z80 and ... ? :confused:

    The spectrum ULA can be implemented in a ...
    guesser guesser September 2010 Hardware
  • Developing ZX Spectrum using 8 chipsHello. Sorry, my english is not perfect. I am developing new realising of ZX Spectrum. There are 8 chips in my sch. Central processor and video proce…

    ... another 8 bit CPU @ 1/6'th that speed - so this ... /> A 21MHz AVR is not 6 times the speed of a ... of a problem. Emulating the ULA will be much harder; if ... the CPLD implementation of the ULA, and use that for the ...
    Winston Winston September 2010 Hardware
  • Help with broken SpectrumHi There, Just received a ZX Spectrum computer. It's an issue 3B (48k version). When I power it up (9V centre pin -V) nothing happens. It's complete…

    ... ] 'DC' voltage on ULA pin 32, Z80 pin 6 and video encoder ... things. Oh and pop the ULA out & re-socket it ... something. My gut says dead ULA but I prefer evidence... ;)
    RetroTechie RetroTechie September 2010 Hardware
  • emulatorsplease help can we see clearly which emulator emaulates which hardware is there any that has a pc function key for the mulitface nmi button and the +…

    ... (use F5)
    - Speccy 1.6 (use menu)
    - spectaculator (F5 ... around...

    5) The ULA+, as I understand it, will ... on a 128k version. The ULA+ device is a side project ... accurate spectrum clone)...

    6) On BBC Basic: [url]http ...
    kgmcneil kgmcneil September 2010 Emulators
  • Computer junkThought i start thread about this,after reading through the capacitor's thread it is true that components will exhaust themselves overtime,so for tho…

    ... or something to emulate the ULA.. get RWAP to make the ...
    Robin Robin October 2010 Chit chat
  • Computer junkThought i start thread about this,after reading through the capacitor's thread it is true that components will exhaust themselves overtime,so for tho…

    ... or something to emulate the ULA.. get RWAP to make the ... casings and BANG, the spectrum + 6 :)[/QUOTE]

    lots of ...
    guesser guesser October 2010 Chit chat
  • DMA interface for ZX Spectrum[url]http://velesoft.speccy.cz/data-gear.htm[/url] This is internal DATA-GEAR interface for any 8-bit computer with Z80CPU. Use Direct Memory Access…

    ... refresh and certainly no video ula ram contention to contend with ... for ntsc machines!
    pity ula+ not sam compatible and still ... get hmpr bits 5&6 to add 16 colours to ...
    Roger Jowett Roger Jowett October 2010 Hardware
  • emulatorsplease help can we see clearly which emulator emaulates which hardware is there any that has a pc function key for the mulitface nmi button and the +…

    ... 81 had pretty convincing ula interference but no dot ... crawl and ula snow - though these are ... spectrum emaultors please
    6. sim coupe has no tap ... br />

    7. ula+ is only for the harlequin ... or with the spectrum ula a whole third of ...
    Roger Jowett Roger Jowett October 2010 Emulators
  • emulatorsplease help can we see clearly which emulator emaulates which hardware is there any that has a pc function key for the mulitface nmi button and the +…

    ... (use F5)
    - Speccy 1.6 (use menu)
    - spectaculator (F5 ... around...

    5) The ULA+, as I understand it, will ... on a 128k version. The ULA+ device is a side project ... accurate spectrum clone)...

    6) On BBC Basic: [url]http ...
    Roger Jowett Roger Jowett October 2010 Emulators
  • emulatorsplease help can we see clearly which emulator emaulates which hardware is there any that has a pc function key for the mulitface nmi button and the +…

    ... expalantion on bits 5&6 of hmpr and how it ... for mode 4? pity the ula+ chap didnt get hold of ...
    Roger Jowett Roger Jowett October 2010 Emulators
  • Proof of time travel?A woman is seen at a premier of a Charlie Chaplin movie, in 1920, talking into a MOBILE PHONE!!! [url]http://uk.movies.yahoo.com/blog/article/57334/…

    [SIZE="6"]Oh no!!!!!![/SIZE]

    ... missing, and I need the ULA from that to power my ...
    ewgf ewgf October 2010 Chit chat
  • Vic 20 game better than Speccy version?Years ago, when I had my Vic 20 I had a game called Blitz, it was on the welcome tape in fact. Very simple game, but strangely addictive. For those t…

    ... issue is that the Oric ULA always had 3 lines of ... after a break of about 6 months. I'm just continuing ...
    Digital Prawn Digital Prawn October 2010 Games
  • Poll: The best spectrumIm putting this up as weve had quite a lengthy discussion discussing the highs and lows of all spectrum models so heres a poll for personal preferanc…

    ... the original design in about 6 weeks. However of the various ... proudest of. ROM, RAM, CPU, ULA, and that's it. Even ...
    chev chev December 2010 Hardware
  • 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…

    ... /> I have doubts that a ULA could die if the Z80 ... least normally.
    Anyway the ULA had a heatsink on it ... .... how can this resonator of 6.5Mhz generate the Z80's ...
    gtsamour gtsamour December 2010 Hardware
  • 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…

    ... .... how can this resonator of 6.5Mhz generate the Z80's ... . This is exactly half the ULA main frequency (the pixel clock ...
    mcleod_ideafix mcleod_ideafix December 2010 Hardware
  • 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…

    ... the original ceramic resonator of 6.5Mhz, I used a crystal ... circuit is part of the ULA it's not as simple ...
    guesser guesser December 2010 Hardware
  • 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…

    ... that point would be 6.4 (?) and 6.55 MHz. Which ... ), input signal into relevant ULA pin, and disconnect the ... other ULA oscillator (output) pin.

    6.5 MHz, I quickly ordered ... the same goes for those 6.5 MHz, 3-pin ...
    RetroTechie RetroTechie December 2010 Hardware
  • 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…

    if it's an issue 4 board or above it needs a 6C001E-7 ULA or it won't work reliably. A 6C001E-7 can be used in earlier versions.

    What issue board is it?
    guesser guesser December 2010 Hardware
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... possibility of attribute clash. The ULA+ makes the screen look like ... it has (IIRC) 6 bits per pixel, yet having ... per pixel.

    The ULA+ is within the spirit of ... , and a clone with a ULA+ is still very definitely a ...
    Winston Winston January 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 …

    ... TTL chips, not inside the ULA as in the +2A/B ... the PAL 10H8 pins 5, 6 and 7 this way:
    6 and 7.
    mcleod_ideafix mcleod_ideafix January 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 …

    ... TTL chips, not inside the ULA as in the +2A/B ... the PAL 10H8 pins 5, 6 and 7 this way:
    6 and 7.[/QUOTE]

    BiNMaN BiNMaN January 2011 Hardware
  • Where's it all going?[Rerouted from 'Assembler Intricacies' in Development Forum] [QUOTE=Timmy;506104]I don't think we're in disagreement here. As I've said it's a niche…

    ... conversion could take 5 or 6 months of solid coding but ... games that took 5 or 6 months to develop by full ... work and the deadline was 6 weeks away!
    [/quote]
    ula. Whether it ever gets done ...
    Alcoholics Anonymous Alcoholics Anonymous January 2011 Sinclair Miscellaneous
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... six weeks to develop the ULA.

    If you read ... you'll find that the ULA design really is a work ... AND fit in a 5C ULA with everything else that had ... to fit inside the ULA, AND met the design brief ... laid out) and he had 6 weeks in which to design ...
    Winston Winston February 2011 Sinclair Basic
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... six weeks to develop the ULA.[/QUOTE]
    Such excuses ... AND fit in a 5C ULA with everything else that ... had to fit inside the ULA[/QUOTE]
    Any alternative ... out) and he had 6 weeks in which to design ... patented then it's specific ULA content he made, but ...
    TVzombie TVzombie February 2011 Sinclair Basic
  • 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…

    ... pin 7 (A1) of ICs 6-13 is permanently low. Tests ... 7 and ground. Removing the ULA cleared the short. The short ... reappeared when the ULA is replaced. I guess this ... market for a good 6C00IE-6 ULA.

    Can anyone tell ...
    weathereye weathereye February 2011 Hardware
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