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  • 48k spectrum restarts by itselfFirst of all hello from a newb and thank you for your help. This site has already offered me a lot of insight. I have a 48k spectrum that will boot …

    ... times. It is the only chip that is not soldered on ...
    hedge hedge January 2010 Hardware
  • Can ULA kill other componentsIn my search for a problem I used a ULA6C001E-7 on a board that had a ULA6C00IE-6 chip. Q1) Should this have worked? Q2) After this experiment both …

    ... that had a ULA6C00IE-6 chip.

    Q1) Should this ...
    hedge hedge January 2010 Hardware
  • ULA Plus and Interlace.May be a bit late to suggest this, but here goes. Did the original Speccy ULA actually output a proper PAL interlaced image, with timing pulses on a…

    ... ULA actually output a proper PAL interlaced image, with timing pulses ...
    joefish joefish January 2010 Hardware
  • ZXDS, DSi XL and R4 cardI am thinking of asking my family to chip in for a DSi XL for my birthday in a few week's time. Given that my main use of my current DS Lite is for…

    ... of asking my family to chip in for a DSi XL ...
    szeliga szeliga February 2010 Emulators
  • ULA equivalent?Gives it an ULA equivalent for the ZX 48K? Or not because the ULA is a custom chip. Micky

    Gives it an ULA equivalent for the ZX 48K? Or not because the ULA is a custom chip.


    Micky
    -Micky -Micky February 2010 Hardware
  • 8 bit AY samplesAny one here got a great big fat (sorry, phat) folder full of 8 bit sound chip samples in wav format that I can play around with, fancy making me a c…

    Any one here got a great big fat (sorry, phat) folder full of 8 bit sound chip samples in wav format that I can play around with, fancy making me a chiptune in Reason 4 :D
    Dave Fountain Dave Fountain March 2010 Chit chat
  • More stuff..Ok, another visit to my loft and I've found some more Speccy stuff! Huzzah! Here's the list and the pics: Finders Keepers The Zacaron Mystery Fairl…

    ... (cassettes only)
    Make A Chip (no box)
    A bunch ...
    evilpaul evilpaul April 2010 Sales
  • 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…

    ... 2048 uses MC 1377 as PAL encoder, maybe that one is ...
    kpuchatek kpuchatek April 2010 Hardware
  • ZX Spectrum colour palette - Equivalent 8-bit RGB values?I'm wishing to do some ZX Spectrum games screenshots on my Mac, but cannot find any information on the net which states what the equivalent 8-bit RGB…

    ... the Texas Instruments TMS9918 video chip (used in the ColecoVision, CreatiVision ...
    DarkAvenger DarkAvenger April 2010 Hardware
  • The quest for true 50 HzAfter experimenting with interframe blending on Sinclairean, I wonder if someone has ever managed to get a custom Spectrum-friendly 50 (or better, 50…

    ... run the emulator at true PAL refresh rate (better than interframe ...
    Madonna Mk 2 Madonna Mk 2 April 2010 Emulators
  • AY chip testingHi all I have 2 AY38912 and an AY38910, all are untested. Is some kind soul willing and able to test them for me? All costs met etc. Thanks S

    Hi all

    I have 2 AY38912 and an AY38910, all are untested.
    Is some kind soul willing and able to test them for me?

    All costs met etc.

    Thanks

    S
    Spex Spex April 2010 Hardware
  • Screen display but with static noisePicked up an sold as seen speccy+ on the bay,the screen on the ebay listing was garbage but i suspect it was due to the seller using his lcd tv so ma…

    ... something more sinister like faulty chip?,i tried the usual stuff ...
    JACK98 JACK98 May 2010 Hardware
  • FLASH EPROM programming on ZX SpectrumThis is photo of Winston's DIAGNOSTIC BOARD: [img]http://velesoft.speccy.cz/other/diagboard.jpg[/img] Schematic and flash utilities: [url]http://www…

    ... programming protocol for Am29F040B flash chip (or equivalent).

    I ...
    velesoft velesoft May 2010 Hardware
  • Noise channels on AY-3-8912?I'm trying to reproduce a tune that's a jazzed-up version of classical music - i.e. there are drum beats all over the place, to try and mask the low …

    ... the AY-3-8912 sound chip.

    As far as ...
    ajmoss ajmoss May 2010 Hardware
  • Most touching AY music on a Speccy?Speccy music composers have shown us that the the AY chip can do much more than it originally was meant for. There are many tunes that I like and adm…

    ... us that the the AY chip can do much more than ...
    zxbruno zxbruno May 2010 Sinclair Miscellaneous
  • a "few" games ;)well since ebay is chopping my limit to 100 items very soon.. heres 250+ and I know a few are not so common.. I combine post.. up to 5 single covers …

    ... by Mastertronic
    Make A chip by Sinclair
    Master Chess ...
    fog fog May 2010 Sales
  • New soundcard for zx spectrum[url]http://translate.google.com/translate?hl=cs&sl=ru&tl=en&u=http%3A%2F%2Fmicklab.narod.ru%2FZXMSoundCard.htm[/url] It's new sound card based on T…

    [url]http://translate.google.com/translate?hl=cs&sl=ru&tl=en&u=http%3A%2F%2Fmicklab.narod.ru%2FZXMSoundCard.htm[/url]

    It's new sound card based on TURBO-SOUND interface (2x AY chip) + SAA1099 (sound chip from SAM COUPE computer).
    velesoft velesoft May 2010 Hardware
  • So you need to double (or triple, or quadruple) the clock speed...No particular reason for posting this, other than I was looking at an eZ80 evaluation board that does this, and that jogged my memory of a project I'…

    ... . There's actually a chip to do all of this ... and VCO all in one chip) which I would have ... (which are connected together off chip and passed through the low ... as csmith's Harlequin :-) The chip on the top left is ... to the left of the chip.

    The bottom ...
    Winston Winston June 2010 Hardware
  • Hypothetically....If you were putting together a "Spectrum +4" what presently available hardware would you include. My criteria would be total comparability (or as ne…

    ... complete rebuild onto a single chip or new ULA's, extra ...
    ADJB ADJB June 2010 Hardware
  • "Programming the Spectrum in Assembly" series in Micro MartI see that Shaun Bebbington is starting a series of articles in Micro Mart magazine on how to program in assembly for those who might know a little b…

    ... about memory and the AY chip, but I heard that the ...
    Spector Spector June 2010 Sinclair Miscellaneous
  • LDIR timings in contended RAM?The 48K Spectrum technical reference page ([URL="http://www.worldofspectrum.org/faq/reference/48kreference.htm"]here[/URL]) describes the detailed ti…

    ... bytes) * (32T/byte) = 3.2 PAL TV frames = 64 milliseconds.
    ajmoss ajmoss June 2010 Development
  • Games only possible in 128K mode?In the thread: [url]http://www.worldofspectrum.org/forums/showthread.php?t=30145[/url] the discussion of 128K only games comes up, and it made me w…

    ... to write to the sound chip, I think?
    ewgf ewgf July 2010 Games
  • RGB to VGA convertor for ZX128/+2/+2A/+3David Luftner release source code (VHDL) of SCANDOUBLER for ZX128/ZX128+2/+2A/+3: [url]http://velesoft.speccy.cz/other/scandoubler-for-zx128_fixed_by…

    ... MHz from ZX board. ( ULA chip use 17.7345 MHz = 35 ...
    velesoft velesoft July 2010 Hardware
  • Silly question on Russian clonesIv a silly question to ask... Iv been looking at web links about Russian ZX clones with envious eyes, wondering if I might spend money on something…

    ... wondered whether such machines are PAL or NTSC based machines...< ... them across, since both are PAL based...

    ..now ... wondering whether Russian machines are PAL or NTSC based generally?...< ... confess to not knowing whether PAL/NTSC standards apply to ...
    kgmcneil kgmcneil July 2010 Hardware
  • I've got Disciple Replacement IC'sI've got a GAL replacement for IC 8, and IC 9. I had a broken Disciple and it turned out to be the PAL20L8 (IC 8 ). PAL's are hard to find so I've bo…

    ... the PAL20L8 (IC 8 ).
    PAL's are hard to find ...
    Cameraman Cameraman August 2010 Hardware
  • 48K Speccy Repair Log.Some people may know my love for writing up my repairs of arcade PCBs on various forums so thought I would do the same for this little fella. Had th…

    ... very primitive chips, each chip only stores 1 bit ... separate power supplies, each chip needs 12V, 5V and ... is the ULA chip, the only custom chip in the ... wouldn't, replacing the chip fixed the issue, I ... three connected, the suspect chip was was missing its ...
    Womble Womble August 2010 Hardware
  • Basic hardware developmentRecently I looked inside a SNES controller and it has two little IC's that take one bit of input from each of eight lines and outputs them on a line.…

    ... a COM port. But the chip in the SNES controller uses ... , or is there a different chip that would be better suited ...
    wilsonsamm wilsonsamm August 2010 Chit chat
  • Wanted: Spectrum ZX,48,Amstrad CPC, BBC Micro, acorns (USA!)Hello everyone, I help some friends put on some vintage computer gaming events (they are free events at a local library.) In addition to this, I b…

    ... taken an interest in the PAL micros that we missed out ... power (50hz versus 60hz) and PAL video.

    I'm ...
    telmnstr telmnstr September 2010 Wanted
  • ula bookula book is here: [url]http://www.zxdesign.info/book/[/url] can i post sam coupe stuff here - she kind of is a speccy if you stuff the speccy rom i…

    ... 3 dma to one audio chip whereas one dma could have ...
    Roger Jowett Roger Jowett September 2010 Hardware
  • Small CRT monitors - Possible for saleHi all I may and only may be getting some smallish (9") monitors from a TV studio, they are multi input, multi format (SECAM/PAL/NTSC x 2) so could …

    ... multi input, multi format (SECAM/PAL/NTSC x 2) so could ...
    Spex Spex September 2010 Sales
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Latest Posts

  • I bought an accoustic guitar. How do you play it?
    dm_boozefreek on 7:51PM
  • Goodbye Z80
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  • Happy 40th Birthday to the Amstrad CPC464!
    AndyC on 6:29PM
  • Another Birthday! The Game Boy Is 35!
    dm_boozefreek on 6:17PM
  • I am currently watching.....
    Antiriad2097 on 5:05PM
  • European Software Titles with an English version
    harriusherbartio on 12:06PM
  • How Do You Categorize Your Speccy Software and Games?
    harriusherbartio on 11:21AM
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21

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