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<1…25262728293031…34>
  • Spectrum Video Circuitry.Wotcha, I've looking at the circuit diagram of the speccy video circuitry (Hey, I'm snowed in, and theres only so much Civ IV i can stand :p), and I…

    ... purpose of VCC2 from the ULA?

    Thanks ...
    spodula spodula January 2010 Hardware
  • General help needed with setup of CRT TV and PS2...I have been given an LG Flatron to work with my PS2. Its 4:3 CRT and its model is: CL (or Ci?)-21Q20ET. I have plugged the PS2 in AV1 with an RGB ca…

    ... PS2 in AV1 with an RGB cable.

    I'm ...
    HonoredShadow HonoredShadow January 2010 Chit chat
  • Cyberbig (Animagic S.A.)So, on dm_boozefreek's semi-recommendation (he's bored of it now) I've been playing [url=http://www.worldofspectrum.org/infoseekid.cgi?id=0010481]Cyb…

    ... , and this is with standard ULA emulation.

    So has ...
    Vertigo Vertigo January 2010 Games
  • flickering noisy screenI have just replaced the ram and ULA. The spectrum boots up OK but the screen is very noisy/wobbly/flickering really annoying :) I am wondering how …

    ... just replaced the ram and ULA. The spectrum boots up OK ...
    hedge hedge January 2010 Hardware
  • ULA Book Price - Feedback PLEASEThe book is coming together very nicely, and I am in the process of kicking off all the administration tasks like getting ISBN numbers and setting up…

    The book is coming together very nicely, and I am in the process of kicking off all the administration tasks like getting ISBN numbers and setting up with the printers.

    In order to do this, I need to set the price. The intention is to try and ...
    csmith csmith February 2010 Sinclair Miscellaneous
  • IF1 and 48k Capacitor QuestionsHi, I am not very knowedgeable about electronics but I am willing to give stuff a go.. I have a microdrive that is not performing and for various r…

    ... assume is leg1 of the ULA through to a leg on ...
    hedge hedge February 2010 Hardware
  • ZX Demos and the wow factorI remember reading a few comments in the past 3 years regarding demos. Some comments included how boring it was to see this or that effect again, how…

    ... good."? The DivIDE and the ULA+ are good examples of this ...
    zxbruno zxbruno March 2010 Development
  • Is there any video input on expansion bus?Imagine you want to build a custom display hardware, for instance, to add hardware sprites to display. Is it possible to design such a device so that…

    Imagine you want to build a custom display hardware, for instance, to add hardware sprites to display. Is it possible to design such a device so that the video signal can go into Spectrum, ULA and then to standard RF socket?
    maiki maiki March 2010 Hardware
  • Someone can help me to fix my Zx Spectrum?I did a video about the startup: [url]http://dl.dropbox.com/u/1566495/ZXSPECTRUM03.mp4[/url] I have replaced the ULA with a working one (same proble…

    ... />
    I have replaced the ULA with a working one (same ...
    gibs gibs March 2010 Hardware
  • Have a real 48k Speccy? yes ? I need your help.Im looking to run this quick test on as many [COLOR="Red"](only)[/COLOR] 48k Spectrums as possible [B][COLOR="Red"]files moved[/COLOR][/B] [URL="ht…

    ... the board issue, the CPU, ULA you have inside please report ... ="red"]Zilog Z80A[/COLOR]
    ULA: [COLOR="red"]6C001E-7[/COLOR ...
    Richard_Butler Richard_Butler March 2010 Development
  • 8 pin DIN to Component RGBSpectrum +3. OK, my monitor has red, green and blue component RCA input on it. Could someone please tell me how to wire an 8 Pin DIN to the 3 RCA cab…

    Spectrum +3. OK, my monitor has red, green and blue component RCA input on it. Could someone please tell me how to wire an 8 Pin DIN to the 3 RCA cables? Would I need any capacitors? Is this even possible?
    wootlanter wootlanter April 2010 Hardware
  • Static vs stacked local variables in z88dkHello everyone. I'm doing a program for Spectrum 48KB with z88dk v1.8 (XX Mar 2008), and I eventually discovered that if your local variables in fun…

    ... address 32768, far from the ULA's hands, while the stack ...
    Ricardo Cancho Ricardo Cancho 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…

    ... TV out, nor Composite works. ULA fault ?
    It seems TC ...
    kpuchatek kpuchatek April 2010 Hardware
  • Tricks with IN 31It's generally considered unwise to use a Kempston joystick's fire button to start a game, because the floating bus effect can make arbitrary data ap…

    ... read IN 31 while the ULA is still drawing the upper ...
    ajmoss ajmoss April 2010 Hardware
  • Fixed schematic of zx128+2 (grey)This is new fixed schematic of ZX Spectrum 128+2 (grey model) [url]http://velesoft.speccy.cz/other/zx128plus2-iss3-schematic%28corrected_v01%29.png[/…

    ... and absent signal IORQGE in ULA part....

    This is ...
    velesoft velesoft April 2010 Hardware
  • Spectrum 2+ R/F Box issues.Hi people, Not done alot here but looks as-if I may need some assistance with my +2 I recently bought. I was testing the machine out and all was ok…

    ... am aware there is an RGB solution and can see the ...
    tokyoracer tokyoracer April 2010 Hardware
  • OMD at the Vintage Computing FestivalJust got this via Farcebook: (Also add to the list of speakers our very own [B]csmith[/B] on the Spectrum ULA) NEWS RELEASE A walk on the geek side …

    ... ]csmith[/B] on the Spectrum ULA)

    NEWS RELEASE
    Winston Winston April 2010 Announcements
  • Video problems in a +2BI was looking for the original thread, but I didn't found it... I've got a +2B with video problems through RF modulator (nothing special, all of my …

    ... had time to build a RGB cable, and tested the +2B ...
    Zup Zup April 2010 Hardware
  • Spectrum+ from ebayI recently received a Spectrum+ that I bought off ebay for about ?10 including postage. I have not tested it yet but had a quick look inside through …

    ... can remember. Spectrums were all ULA, transistor and RAM faults, or ...
    alien8r33d alien8r33d May 2010 Hardware
  • Soo... if I wanted to get a Speccy again...after all these years without one, how would I go about getting things fairly similar to how I have things with an emulator? I don't mean all featur…

    ... in via scart for possibly RGB or something similar for best ...
    HonoredShadow HonoredShadow May 2010 Sinclair Miscellaneous
  • +3 FaultsI have some Spectrum +3s for testing - looks like they all need drive belts. One will not start up and shows a screen of yellowy green, then one of …

    ... . Ah I thought - maybe the ULA - the other +3's case ...
    rwap rwap May 2010 Hardware
  • Re-inventing the wheel......TROOPER: POINT 5 First an apology, my level design sucks (well I'm not happy with it) so Trooper is taking an age to do. Anyway this game comes …

    ... , I ws thinking of a ULA+ version but the loading screen ...
    BiNMaN BiNMaN May 2010 Development
  • +3 ProblemsI have been having a few problems with my +3 and I am wondering if anyone can help or give me some advice: 1. I have 2 blank disks which I have save…

    ... all TV's not being RGB compatible and it seems both ...
    Spectrum +3 Spectrum +3 May 2010 Hardware
  • Why only 2 colors ?Maybe this question dont go on this part of the forum, but dont know what other part to ask. Why the Spectrum only can show 2 colors at time in the …

    ... memory. Maybe not the same ULA ?

    Do you really ...
    arfgh arfgh June 2010 Sinclair Basic
  • How to make a comp video cable for +2 greySorry to bog, maybe the clue is just laiden on another thread but.... I have just obtained a 128 +2 grey, fully working BUT the aerial signal is bad…

    ... /> begin to think to the RGB DIN socket. I've read ... about making
    an "RGB socket to SCART plug" cable ... is sufficent to use on RGB din socket pin 2 for ...
    Cignale Cignale June 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'…

    ... 14MHz clock that drives the ULA... so I think for anyone ...
    Winston Winston June 2010 Hardware
  • testing if speccy is fully functionalHi, There is so much mention of T states but still confused. Does this mean if an instructin is out by a T-state or more then the speccy is faulty?…

    ... to check the CRC of ULA, the basic rom and the ... that checks the basic rom, ULA, and Z80 processor and memory ...
    naz2000007 naz2000007 June 2010 Sinclair Miscellaneous
  • 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…

    ... a single chip or new ULA's, extra RAM or anything ...
    ADJB ADJB June 2010 Hardware
  • VCF report and photosNot sure where to put this, exactly...but here it is, what went on at the Vintage Computing Festival at Bletchley Park last weekend. Finally I've fo…

    ... and faithful to the 48K ULA - all the timings and other ... effects of the ULA are the same.

    Winston Winston June 2010 Sinclair Miscellaneous
  • RFC: ZXI hardware interface standardisationReposted from c.s.s to reach a wider audience [QUOTE=Andrew Owen] You may have noticed that there are more people making add-ons for the Speccy than…

    ... how bad it is, the ULA uses 32768 ports. Most of ...
    guesser guesser June 2010 Hardware
<1…25262728293031…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
  • European Software Titles with an English version
    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
    harriusherbartio on April 21
  • +3 Disk drive motor
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