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  • one laptop per child projectI was looking at this mainly as a result of a word war between intel and others. I had heard about the project of course but this time decided to ha…

    ... , 256mb of ram and 1gb flash storage amongst other things).
    Toxitalk Toxitalk May 2007 Hardware
  • I wonder if . . .An M68k could emulate a ULA. You know, like the ZX80 used the cpu for rastering the picture on the screen. This would mean that the people who clone…

    An M68k could emulate a ULA.

    You know, like ...
    wilsonsamm wilsonsamm May 2007 Hardware
  • Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…

    ... I see here is that ULA will no longer access video ... . I can't just remove ULA from the circuit because it ... it possible to disable the ULA's video generation functionality (i ... you disconnect the oscillator from ULA?

    Also, can someone ...
    Avian Avian May 2007 Hardware
  • A Spectrum that fixes itselfWell, the modulator on my 128K toastrack machine fixed itself. It used to drift horribly within the first half hour or so of power up, but now it's a…

    ... nice toasty warmth of the ULA, and regular use (I only ...
    Winston Winston June 2007 Hardware
  • The Non Randomness of Sam BasicHows about this for weird. Hardly ever bothered with such simple stuff before but this is what I just did on the Sam ( as in a real one now I've got …

    ... end up with solid diagonal stripes of colours from black through ...
    DonkeyPong DonkeyPong June 2007 Sinclair Basic
  • Mercury Meltdown RevolutionI read that this Wii game had a ZX Spectrum inspired loading screen [url]http://www.youtube.com/watch?v=RWJRGCcxyVU[/url] Green border stripes anyw…

    ... [/url]

    Green border stripes anyway.

    Game looks ...
    Geoff Geoff June 2007 Chit chat
  • Disable onboard memoryWould this work...? Access to onboard I/O can be disabled by holding IORQGE high. Would it be possible to create a MEMRQGE in a similar way to disa…

    ...
    |
    Z80 MEMRQ +----+--/\/\/\/---+------>ULA, top 32K RAM
    | | |
    Jonathan Harston Jonathan Harston June 2007 Hardware
  • Doctor Who FinaleHello, all.. A slightly confused story, but at least it had a bit less of John Simm acting like a total and utter loon.. SPOILER SPOILER …

    ... of the endings - Three words: Flash Gordon ending :)


    hackersanon hackersanon June 2007 Chit chat
  • ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …

    ... output) or a faulty Ferranti ULA chipset?

    Unfortunately spectrum ... from tv.

    If ULA is the problem does anyone ... know if there are replacement ULA chips?I know that ferranti ... .uk/T34VG1-USSR-Made-of-ULA-Chip-for-Z80-CPU-ZX ...
    Msx2 Msx2 July 2007 Hardware
  • Fuse for Mac OS X beta releasesA beta version of Fuse for Mac OS X has been released at the dedicated sourceforge project: [url]http://sourceforge.net/projects/fuse-for-macosx/[/u…

    ... active, as the +2A/+3 ULA applies contention only when MREQ ...
    Fred Fred July 2007 Emulators
  • Home made SinclairsHi, I mentioned in another thread that I had made a ZX Spectrum out of spare parts. If you'd like to see my efforts, I've set up a simple web page o…

    ... anything clever like make the ULA circuit out of 74-series ...
    Phu Phu July 2007 Hardware
  • Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…

    ... are getting excessively hot. The ULA gets a bit toasty, but ... that was normal anyhow. The ULA is a Ferranti 6c001E7.
    gcallard gcallard July 2007 Hardware
  • Another spectrum saved! (almost)I'm feeling rather chuffed* I just mended my spectrum+ unfortunately several keys were dead, and on opening the keyboard up one of the membrane tails…

    ... replace a single chip - faulty ULA
    guesser guesser July 2007 Hardware
  • Spectrum +3 disk drive errorsHello!As i am waiting for the ula chips to fix my spectrum 128+ i received another spectrum +3 i bought from ebay. I changed the drive disk belt as …

    ... i am waiting for the ula chips to fix my spectrum ...
    Msx2 Msx2 July 2007 Hardware
  • Ebay complaintsDoes anybody know how to complain to Ebay about Ebay? They's just scrapped my auction for a ULA chip saying it was an illegal item :lol: So apart f…

    ... scrapped my auction for a ULA chip saying it was an ...
    DEATH DEATH July 2007 Chit chat
  • Spectrum Diagnosis: Purple is not my colour!Hi, I thought the self-fault-finding amongst you might appreciate my learning experience this afternoon in fixing my home-made speccy 48K. Yesterda…

    ... Memory Controller... no seems fine. ULA board... again clean. RAM board ...
    Phu Phu July 2007 Hardware
  • Harlequin ZX Spectrum Clone now 100% compatible!Hi all! The Harlequin ZX Spectrum clone now shows full timing compatibility with the ZX Spectrum! 8-) Both the ULA IO and memory contentions are fa…

    ... ! 8-)

    Both the ULA IO and memory contentions are ...
    csmith csmith July 2007 Hardware
  • Eprom blower for IF2 cartridgesI saw the other thread about eprom blowers, but this is somewhat different. I've been talking to Paul, the creator of the custom 128K keypad and cust…

    ... .uk/VP180-48Pin-Universal-Eprom-Flash-MCU-Programmer-USB_W0QQitemZ260142327746QQihZ016QQcategoryZ4663QQssPageNameZWDVWQQrdZ1QQcmdZViewItem[/url]
    zxbruno zxbruno July 2007 Hardware
  • Pentagon-1024 manufacturingI am finishing a trial assembly of 2 boards. Unfortunately getting components appears to be very time-consuming (it's difficult to obtain electronic …

    ... UV EPROM for now, no flash support. I have neither time ... no requests to design a FLASH card for it (however it ...
    Sonic Sonic July 2007 Hardware
  • Latest operating system for Z88 is releasedWe are proud to tell everyone that the beta version of latest operating system (OZ) for the Z88 is available on sourceforge. Update is really easy a…

    ... easy and requires only a flash card and more than 256K ...
    elpekos elpekos July 2007 Sinclair Miscellaneous
  • ANN: Tipshop updated Sunday, 05 August 2007Sunday 05 August 2007 A huge July (ahem! Ed) update in the form of massive amounts of tips, POKEs and maps - hurrah! * A new Good Egg called Archie …

    ... , Cyrox , Elvin the Elf ,
    Flash Gordon , Gunfright , H.A.R ...
    hackersanon hackersanon August 2007 Announcements
  • Anyone knows how ULAs were designed?Hi I just finished reading a very interesting article about [URL="http://arstechnica.com/articles/culture/a-history-of-the-amiga-part-3.ars"]history…

    ... />
    I'm guessing that ULA is a lot simpler that ...
    Avian Avian August 2007 Hardware
  • So many questions...I'm a regular reader of this forum and everyday I see so many questions people have. Questions regarding technological decisions made in the past. Qu…

    ... the company? How was the ULA designed? Etc., etc.

    georgedb georgedb August 2007 Hardware
  • Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…

    ... on 128k) cycles after the ULA has pulled the INTREQ low ... cycle after it happens). The ULA needs to fetch the screen ... on the bus when the ULA reads them, not later, especially ... a real machine but unfortunately ULA in my beloved 48k died ...
    Patrik Rak Patrik Rak September 2007 Emulators
  • Sam Revival issue 19 out now! [Sam CoupIssue 19 of Sam Revival is now out! Let's start off with what's on the coverdisk: Conquest. Written by Peter King in 1997 this originally had a lim…

    ... Atom interface for using Compact Flash cards with a built in ...
    Quazar Quazar September 2007 Announcements
  • Best 128k model to add CF IDE disk etcHi, i'm hoping to turn one of my speccys into more of a 'console' the plan is i'd like loads of speect games installed say on a compact flash card …

    ... installed say on a compact flash card mounted inside the speccy ...
    Interceptor Interceptor September 2007 Hardware
  • I want to build a new, super spectrum ;-)only kidding Andrew :-) my brain's going at a mile a minute at the moment, so I thought I should put some of the ideas down in case one of them is w…

    ... away from obsolete parts, the ULA is the obvious problem.
    ULA and ram I presume..). what ...
    guesser guesser September 2007 Hardware
  • Broken SpectrumsChaps ( & Mrs Death ), I was looking at getting some dynamic ram chips for the next phase of the Harlequin stuff, and I started thinking...... I've…

    ... />
    I've got the ULA off one of them and ...
    csmith csmith October 2007 Hardware
  • Multiface +3The other Multiface topic has reminded me about this... I may still have this lying about somewhere (although +3 i had at the time is long dead and …

    ... long dead and gone from ULA failure)

    I remember ...
    spider spider October 2007 Hardware
  • Job OfferThis is part of a job description I have just had from a slave trader. [QUOTE]As PHP Developer you will be working on innovative, interactive web …

    ... web site designs and a flash and PHP based content management ... (CMS) for creating animated, interactive flash banners and applications.[/QUOTE]
    ADJB ADJB October 2007 Chit chat
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Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
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