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  • Flicker fixer for ZX 48KHas anyone the schematics for the flicker fixer: [URL]http://8bit.yarek.pl/computer/zx.48/[/URL] Micky

    ... be able to detect a contended memory access, and will cause ...
    mcleod_ideafix mcleod_ideafix April 2010 Hardware
  • Flicker fixer for ZX 48KHas anyone the schematics for the flicker fixer: [URL]http://8bit.yarek.pl/computer/zx.48/[/URL] Micky

    ... in IORQ cycle speed-up contended ports adress (OUT/IN instructions ...
    velesoft velesoft April 2010 Hardware
  • IM2 Loading on +3EHi there Speccy Guru's, As some of you know, I've spent a while building the ultimate image for +3e, it's currently at 6000+games and demos and i've…

    ... done on a machine with contended screen memory (it requires too ...
    gasman gasman April 2010 Development
  • IM2 Loading on +3EHi there Speccy Guru's, As some of you know, I've spent a while building the ultimate image for +3e, it's currently at 6000+games and demos and i've…

    ... done on a machine with contended screen memory (it requires too ...
    Tom-Cat Tom-Cat April 2010 Development
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... , and TC2068 ( older brother of TC2048 ) was my first Spectrum "compatible ... throught the internal speaker of TC2048, at least in the 2 ... the service manual for the TC2048 from h**p://www.retroreview ...
    retrorepair retrorepair April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... throught the internal speaker of TC2048, at least in the 2 ...
    Mister Beep Mister Beep April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    I have one TC2048 and one TC2068 and they're both silent when loading or saving. My cousin had one TC2048, same thing. The ones at school, same thing. It's by design. It was one of the few things about the Timex that I didn't like back then.
    zxbruno zxbruno April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... /> TC2068 has different EAR input, TC2048 seems to have the same ...
    kpuchatek kpuchatek April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... /> TC2068 has different EAR input, TC2048 seems to have the same ...
    retrorepair retrorepair April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... naszemu :)

    Też mam TC2048 i też na nowszym telewizorze ...
    Bricabrac Bricabrac April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... throught the internal speaker of TC2048, at least in the 2 ... worth I have a Timex TC2048 and Timex TS2068, so I ...
    Fred Fred April 2010 Hardware
  • Disconnecting speaker in TC2048Hello, Does anyone know how speaker in Timex is connected to motherboard? Can it be just unplugged? I would like to disable it somehow (and pass the …

    There are at least three revisions of TC2048.
    My Timex is opened now and speaker is soldered to board with two cables, very easy to disconnect.
    I can make good photo if anybody interested.
    kpuchatek kpuchatek April 2010 Hardware
  • Disconnecting speaker in TC2048Hello, Does anyone know how speaker in Timex is connected to motherboard? Can it be just unplugged? I would like to disable it somehow (and pass the …

    ... control volume without opening the TC2048, consider the use of simple ...
    zxbruno zxbruno April 2010 Hardware
  • Resolution & Memory Question ...Hi, I'm hoping someone with some experience writing an emulator, or a vast knowledge of all things Spectrum can help me answer the following questio…

    ... Data
    0xOFFSET2+1 - 0xOFFSET3 : Contended Memory
    0xOFFSET3+1 - 0xFINAL ...
    micpringle micpringle April 2010 Emulators
  • Resolution & Memory Question ...Hi, I'm hoping someone with some experience writing an emulator, or a vast knowledge of all things Spectrum can help me answer the following questio…

    ... + attribute) which is also the contended memory.
    32768 to 65535 ...
    Arjun Arjun April 2010 Emulators
  • Resolution & Memory Question ...Hi, I'm hoping someone with some experience writing an emulator, or a vast knowledge of all things Spectrum can help me answer the following questio…

    ... . Quite right. I inadvertently clubbed contended memory with the display memory ...
    Arjun Arjun April 2010 Emulators
  • Resolution & Memory Question ...Hi, I'm hoping someone with some experience writing an emulator, or a vast knowledge of all things Spectrum can help me answer the following questio…

    ... -0x3FFF ROM
    0x4000-0x7FFF (Contended) User RAM
    0x8000-0xFFFF ... RAM

    Within the contended user RAM:

    0x4000 ... certain times. This is the 'contended memory'.

    The remaining ...
    joefish joefish April 2010 Emulators
  • 48k Timing Tests...Here's v1 of the timing tests for the 48k Spectrum, with a little background [IMG]http://www.zxspectrum4.net/images/timing_test_v1.jpg[/IMG] [URL="…

    ... failed two tests (12 contended and 27 contended). It had warmed only ...
    Metalbrain Metalbrain April 2010 Development
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... ,

    Can somebody with TC2048 give me output of IN ...
    kpuchatek kpuchatek April 2010 Hardware
  • Retro Gaming Love or Profiteering - A DiscussionI'm having a debate on a forum for a popular MAME (arcade emulator) front end (Hyperspin). I'm questioning the ethics of a site called EmuMovies.co…

    ... 16MBps home connection (which is contended and has only 800Kbits or ...
    Winston Winston April 2010 Chit chat
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... ,

    Can somebody with TC2048 give me output of IN ...
    retrorepair retrorepair April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    Hi,

    I am waiting for scope. I'm looking also for second, working TC2048 to compare with mine.

    BR,
    Michal
    kpuchatek kpuchatek April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... ,

    Can somebody with TC2048 give me output of IN ...
    retrorepair retrorepair April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... logic was changing with every TC2048 issue.

    [QUOTE]The ...
    kpuchatek kpuchatek April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... logic was changing with every TC2048 issue.




    If you look into TC2048, the letters printed on ULA ...
    retrorepair retrorepair April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    [url]http://bromba.republika.pl/images/Tc2048.jpg[/url]

    Red or green ? My meter does not show any connection to D17 from them. But I can trace starting from ULA.
    Which issue of tc2048 I have ?
    kpuchatek kpuchatek April 2010 Hardware
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... ]http://bromba.republika.pl/images/Tc2048.jpg[/url]

    Red ... ULA.
    Which issue of tc2048 I have ?[/QUOTE]

    retrorepair retrorepair April 2010 Hardware
  • Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…

    ... .
    Pages 4-7 are contended in that the Z80 and ...
    ajmoss ajmoss April 2010 Hardware
  • Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…

    ... say the same banks are contended so how can that be ...
    Woody Woody April 2010 Hardware
  • Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…

    ... .

    If (HL) is contended, two passes of the loop ... to 50 T for non-contended RAM.

    A fairly ...
    ajmoss ajmoss April 2010 Hardware
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HitBox

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