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  • True Spectrum laptop (no emulation)[url]http://user.tninet.se/~vjz762w/[/url] Hi All, I have build a speccy laptop, battery part is not ready yet.... I did it on 2 days, I will put s…

    ... measure directly at the ULA replacement, because I can ... Measure at spectrum 9v DC input, amp meter in DC ... /> Then measure again without ULA rep. ....
    Figures is ... entirely correct since without ULA
    all ram ... the ground line to ULA socket
    on ...
    Cookie Cookie May 2008 Hardware
  • Spectrum more loved than C64It just occurred to me that the Spectrum must be more loved than the C64 these days. After all, it has been more than a year since an update was made…

    ... credible. Here's how to fix a keyboard though, even though ... if you are lucky dead ULA if not though one project ...
    dekh dekh May 2008 Chit chat
  • Can you see the Spectrum......in this auction? [url]http://cgi.ebay.de/ZX-Spectrum_W0QQitemZ160246792691QQcmdZViewItem?hash=item160246792691&_trkparms=72%3A445%7C39%3A1%7C65%3…

    ... logic rather than the 'second ULA' that the later boards had ... used to fix the colour on screen when the ULA gets too ...
    Phu Phu June 2008 Hardware
  • 48K games that don't work on a +2Not sure if there is already a thread about this but recently I've noticed some old 48K games will not run on my +2 - even in 48K mode. Examples are…

    ... developers to "see" what the ULA was doing. When port 255 ... data being generated by the ULA as it displays the screen ... 48 Mode or SPECTRUM will fix this.

    7) Z80 ...
    Jimmy Jimmy June 2008 Games
  • ANN: Spectaculator 7Spectaculator 7 is now available! More information is available in the [URL="http://www.spectaculator.com/news?ref=wos"]news section[/URL] on the web…

    ... switched ones. Dead easy to fix as well if you ebay ... the PC keypad for normal input.

    [quote=zxbruno;278915 ...
    Jon Needle Jon Needle June 2008 Emulators
  • Unknown ZX81 InterfaceThis interface was part of a lot with some TS1000 and ZX81 computers for parts, among other stuff. Since there are no instructions nor software, I wa…

    ... choke too on the power input to eliminate further noise from ... uses is compatible with the ULA, and it doesn't do ...
    Winston Winston June 2008 Hardware
  • 48K games that don't work on a +2Not sure if there is already a thread about this but recently I've noticed some old 48K games will not run on my +2 - even in 48K mode. Examples are…

    ... colors, etc.)
    -Fix port 255 issue
    -Fix sound?
    -Have ... previous models)
    -Add ear input to the back of the ...
    zxbruno zxbruno June 2008 Games
  • 48K games that don't work on a +2Not sure if there is already a thread about this but recently I've noticed some old 48K games will not run on my +2 - even in 48K mode. Examples are…

    ... colors, etc.)
    -Fix port 255 issue
    -Fix sound?
    -Have ... previous models)
    -Add ear input to the back of the ... shouldn't need any sound fix on a +2A - It doesn ...
    thingley thingley June 2008 Games
  • Is it possible to use external power supply for +-12; +-5 for ZX SpectrumRecently I acquired a damaged Sinclair ZX Spectrum, issue 3B. According to the maintenance manual I have to replace TR4 and TR5. These type of transi…

    ... getting abnormally warm. Only the ULA should get detectably warm.[/QUOTE ... transistors I've removed the ULA in order to save its ... connector is connected to the input (leftmost, to the side of ... of the DMM to the input of the 7805 and the ...
    65C02 65C02 June 2008 Hardware
  • RZX Player interface - Possible?If I have a Mass Storage interface and some media (CF, SD) with a couple RZX files, what would I need to play them on a real Spectrum? If the RZX fil…

    ... speed is controlled by the ula.

    If the rzx ... necessary, just observation of an input cycle and placement of the ...
    Alcoholics Anonymous Alcoholics Anonymous June 2008 Hardware
  • RZX Player interface - Possible?If I have a Mass Storage interface and some media (CF, SD) with a couple RZX files, what would I need to play them on a real Spectrum? If the RZX fil…

    ... a complete reengineer of the input side of the Spectrum - very ... require at least removing the ULA's INT output, and putting ...
    Winston Winston June 2008 Hardware
  • Sinclair Computer Club???We've nearly finished setting up the Commodore Computer Club (UK) - [url]www.CommodoreComputerClub.co.uk[/url], and I have the domain name for [url]w…

    ... I had the software to fix his disk drive. Together, we ... devices. Surely then you want input from Sami Vehmaa (creator of ...
    Philip Kendall Philip Kendall August 2008 Sinclair Miscellaneous
  • Running TZX off an IDE drive? Or streaming from a NAS?Hello. I know about the DivIDE project, and about the ZX Ethernet project, but not how far they've come or what they can do. So: 1. If I have a squ…

    ... high and inhibit the ULA. What the hardware peripheral ... IN instruction for the ULA (due to partial port ... decoding by the ULA, basically, an IN ... input onto the data bus that is consistent for what the ULA ... just presenting the right input to the CPU during ...
    Winston Winston September 2008 Hardware
  • Running TZX off an IDE drive? Or streaming from a NAS?Hello. I know about the DivIDE project, and about the ZX Ethernet project, but not how far they've come or what they can do. So: 1. If I have a squ…

    ... feed it somehow to the ULA to be demoded just as ... possible with a single 3 input OR gate controlling a single ...
    Winston Winston September 2008 Hardware
  • Issue 2 Board - CPU 'Patch'I've been wondering why my issue 2 board has been kicking out this signal when powered up... [IMG]http://www.drumfu.com/ResizedDuffIssue2.jpg[/IMG] …

    ... to pull the IORQGE input to the ULA high whenever address line ... ) is at logic 1. The ULA will therefore only be selected ... also need to check which ULA I have - from the [URL ... fitted with the Type 5C112 ULA have either a transistor (TR6 ...
    jp jp September 2008 Hardware
  • What's the RAND USR code for the test screen?And what versions of hardware does it work on? Ta!

    ... tape (connected to the audio input) and you should get a ... can test the ULA, keyboard, disk driver, tape input, etc. WARNING ! The ...
    Jimmy Jimmy October 2008 Sinclair Basic
  • +2a datacorder problemsHelloooo, how's it going? Reason I'm posting is that 1) I'm a massive speccy fan, it was the first range of computers I ever owned 2) I'm having rea…

    ... the ULA chip is damaged and its not recieving input from the ...
    gtsamour gtsamour October 2008 Hardware
  • +2a datacorder problemsHelloooo, how's it going? Reason I'm posting is that 1) I'm a massive speccy fan, it was the first range of computers I ever owned 2) I'm having rea…

    ... an output socket, not an input socket? Someone will have to ... socket is not an input socket, or the ULA is blown as ...
    Steez Steez October 2008 Hardware
  • +2a datacorder problemsHelloooo, how's it going? Reason I'm posting is that 1) I'm a massive speccy fan, it was the first range of computers I ever owned 2) I'm having rea…

    ... was present). It was tha ULA afterall, changed it and it ... feeding a song in the input (instead of a loading game ... say its definitely a faulty ULA.
    gtsamour gtsamour October 2008 Hardware
  • +2a datacorder problemsHelloooo, how's it going? Reason I'm posting is that 1) I'm a massive speccy fan, it was the first range of computers I ever owned 2) I'm having rea…

    ... you may be able to fix the datacorder, I had a ... /> Steez if its actually the ULA chip i find it very ...
    gtsamour gtsamour October 2008 Hardware
  • +2a datacorder problemsHelloooo, how's it going? Reason I'm posting is that 1) I'm a massive speccy fan, it was the first range of computers I ever owned 2) I'm having rea…

    ... socket would be wired for input because its a disk based ... not wired for input (which may mean that the ULA chip might ...
    Steez Steez October 2008 Hardware
  • Post your computer stupiditiesI used to check this site out quite a lot [url]http://www.rinkworks.com/stupid/[/url] but it doesnt get updated much. So i was wondering what stu…

    ... installed it. It seemed to fix the bug at first so ... machines wouldn't repond to input in a timely fashion. They ... they would phone me to fix it and then I'd ...
    sparkes sparkes October 2008 Chit chat
  • Interlace demoSorry to reference another thread like this, but in the thread: [url]http://www.worldofspectrum.org/forums/showthread.php?p=313428#post313428[/url] …

    ... same display using the UHF input.

    The effect cannot ... artifact of the ULA - but something the +3ś ULA doesn't "suffer ...
    Winston Winston November 2008 Sinclair Miscellaneous
  • Suggestions for Mr. Rich MellorRich, is there a chance any of these things could be available from you in a near future? -AY interface for 16K/48K Spectrums -PS/2 keyboard interfa…

    ... to fix Spectrums (sound fix on +3, memory replacement, ula replacement, hardware fix to ...
    velesoft velesoft November 2008 Hardware
  • microdrive problems and interface 1I am having problems with microdrive. Whatever I try, the motor starts for a second or two and error message shows up "microdrive not present". If I…

    ... so there was an easy fix (bad contact). I also hoped ... might be the same as ULA in 48K, but wiki says ...
    orange orange November 2008 Hardware
  • Retro-X Alpha availableChanges from WIP 7 (Alpha 3) to Alpha 4 ( 1.5.08 - 14.5.08 ). Requested by and help by - in brackets. Bugfixes: * Viewer: o File list not displaye…

    ... the view size of the input window, view size of output ... else Message requester I sould fix?

    [QUOTE]
    Why ...
    LCD LCD November 2008 Development
  • RGB on 48KIs it possible to get better picture (RGB, or at least composite video) from ZX 48K without opening it? (using the expansion port only) I think there…

    ... YUV conversion are made inside ULA, so you only get YUV ... PAL delay is made inside ULA, more-less accurate. It compensates ... we attach to S-Video input then no need for delay ... /> How you know that inside ULA is made RGB-YUV conversion ...
    piters piters December 2008 Hardware
  • 4116 DRAM for 48KSomeone told me I got faulty RAM in my broken 48K. They should be 150ns, right? What would be a good place to buy them from?

    ... , but screen data for the ULA got chewed up sometimes. Tried ... some critical moment when the ULA reads / writes to the lower ... voltage directly from the unregulated input, and voila: the whole (problematic ...
    RetroTechie RetroTechie December 2008 Hardware
  • Timex 1000 PAL conversionHi, a friend of mine sent me a Timex 1000 from the US. I was prepared for the NTSC/PAL issues so no surprise came to me when i got a shadowy dark scr…

    [B]TV/Tape ULA Pin 16[/B]: This pin ... ULA has an internal pull-up resistor that will drive the input ...
    Marcelo Marcelo January 2009 Hardware
  • Timex 1000 PAL conversionHi, a friend of mine sent me a Timex 1000 from the US. I was prepared for the NTSC/PAL issues so no surprise came to me when i got a shadowy dark scr…

    ... for programming special states in ULA. So I would remove them ... transistor (BC547) and the video input of the TV set.
    ingo ingo January 2009 Hardware
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