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  • Faulty +2 Grey :(Hello everyone... i was trying to fix a +2 grey board the other day, i had it for some time now. It gave a black screen (paper and border) with two …

    ... known working rom, z80 and ULA on it and made no ...
    gtsamour gtsamour November 2007 Hardware
  • Where shall I start to look ?I got hold of a faulty 48k, Issue 6. It displays a picture like shown below: [URL]http://www.gjelberg.no/miscpics/speccyfault.jpg[/URL] Some of the…

    ... also tried to swap the ULA with a known working one ...
    Pilsener Pilsener December 2007 Hardware
  • Faulty Spectrum (help requested)I have an issue 6a specci. It's Z80 has the fault m1 line problem (Multiface 128 does not work). So I decided to put in a new Z80 but unfortunately i…

    ... were made with a working ULA and Z80 from another Spectrum ...
    UTom71 UTom71 February 2008 Hardware
  • ANNOUNCE: BASin r14 is up. New SCREEN$ paintbox included.Hi all, Well, I can't sit on this any longer - so I've released it. Let's all get a good testing session going, eh? You can get the new BASin [url=…

    ... is space for in the palette.
    Fixed - A bug which ...
    Dunny Dunny February 2008 Emulators
  • Fuse for Mac OS X 0.9.0 ReleasedA new version of Fuse for Mac OS X has been released at the dedicated sourceforge project and shortly here on WoS: [url]http://sourceforge.net/proje…

    ... active, as the +2A/+3 ULA applies contention only when MREQ ...
    Fred Fred March 2008 Emulators
  • No colourHi! I'm trying to fix a 6A 48K machine that outputs no colour and shows the characters as if they were in bold. So far, I've done a couple of thing…

    ... of things:

    Changed ula with a known working one ...
    odious odious April 2008 Hardware
  • SENDING beeper music from Z80 to AY?Hello. According to [url]http://z80.e-demo.pl/[/url] Z80 sends music-data to ULA (the 1-bit transducer). I was wondering if it's possible to send…

    ... ] Z80 sends music-data to ULA (the 1-bit transducer).
    ULA).
    At first, to make ...
    Mister Beep Mister Beep April 2008 Sinclair Miscellaneous
  • list of ZX games with raining effect(ula snow)If you know any ZX games with raining effect in screen, then add game name to list. I know about this games only: (tested on real ZX128+2 - grey) 4x…

    If you know any ZX games with raining effect in screen, then add game name to list.

    I know about this games only: (tested on real ZX128+2 - grey)
    4x4 puzzle
    at4open
    black raven
    breditor
    death valley
    gambit< ...
    velesoft velesoft April 2008 Games
  • Trying to add a play lead to my +2(grey)I know this has been discussed at length and rediscussed again but I'm still not sure how to do it! I just want to add a line in so that I can turbo …

    ... one of these fries my ULA if I get it wrong ...
    thingley thingley April 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…

    ... not possible in Median cut Palette calculation mode
    o SAM ...
    LCD LCD April 2008 Development
  • Socket to me..Specchums ! I'm laying out the PCB for the ULA replacement, and I need to know how common it is for the following IC's to be socketed (all to the ri…

    ... out the PCB for the ULA replacement, and I need to ... to the right of the ULA):

    Issue 2 - IC25 ... /> Capacitor C28 next to the ULA might pose a problem, so ...
    csmith csmith May 2008 Hardware
  • A good site with Z80 ZX Spectrum 48K tunesI found this good site; [url]http://z80.e-demo.pl/[/url] ; I listened to a few tunes yet, and I am [B]AMAZED![/B][B]To me it sounds WAY BETTER THAN A…

    ... second dedicated Z80 chip and ULA for beeper and so enable ... there were two Z80 and ULA chips that would provide stereo ...
    m1omg m1omg May 2008 Sinclair Miscellaneous
  • One's speccy is unwell, can anybody help?Hi chaps! This would be my first post here, so hello to all :smile: I've got a 128+ heatsink speccy that seems to have a display issue whereby after…

    ... anything to do with the ula getting a bit too hot ...
    Yeti Yeti June 2008 Hardware
  • Timing... in the CSS faqI was looking at the CSS faq for something completely unrelated and noticed: [quote] Then the 192 screen+border lines are displayed, followed by 56 …

    ... placing a cooler onto the ULA has been observed to remove ... vary slightly with temperature. The ULA dissipating heat into the PCB ... period of time. Preventing the ULA from getting as warm as ...
    Winston Winston July 2008 Hardware
  • ZX-style gameLooking at the new Spectrum games, like Vera, I surprised. Two pages of discussion in your forum and twelve in Russian one ! Other new games has the…

    ... original ZX screen size, original palette. But my game will be ...
    Tuapse Tuapse September 2008 Games
  • A video interface for the Spectrum, MSX compatibleSo you can use the same code for displaying sprites, tiles, characteres, and so no, on both the Spectrum and the MSX. That is, the Spectrum now has a…

    ... -screen" feature: the well known ULA video output, and a TMS9929 ...
    mcleod_ideafix mcleod_ideafix October 2008 Hardware
  • Another badly behaved RAM upgradeI have a 48K issue 4A board (yellow it is) that was a 48K machine from new, but only reports 16K working with the Sinclair ZX Test ROM in an Int2. H…

    ... swapped in a known good ULA chip just coz its an ...
    Womble Womble November 2008 Hardware
  • 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…

    ... fix on +3, memory replacement, ula replacement, hardware fix to add ...
    zxbruno zxbruno November 2008 Hardware
  • Sinclair Spectrum ULA BookAnnounced in the Hardware forum, but might be interesting to others: [url]http://www.worldofspectrum.org/forums/showthread.php?p=324213[/url] Regar…

    Announced in the Hardware forum, but might be interesting to others:

    [url]http://www.worldofspectrum.org/forums/showthread.php?p=324213[/url]

    Regards
    Chris
    csmith csmith December 2008 Sinclair Miscellaneous
  • Cro S2008Hi everybody!!! I hope this is right thread? :-) I want to share with you my new project. I call it ?S2008?? The idea was to build Spectrum48K clo…

    ... good staff already built in? ULA, Z80, LM1889 must stay in ...
    zboskovi zboskovi January 2009 Hardware
  • IN 255 behaviour not emulated in Spectaculator and ZXSpinI'm not speaking about "normal" IN 255 behaviour. All of you know what I'm taking about: IN 255 can be used to "read" screen data as it's retrieved f…

    ... from memory by the ULA to draw the screen. ... to detect when the ULA has finished generating the ... contended memory, and the ULA stops the Z80 clock until ... Z80 resumes operation, the ULA has been released the ... the mentioned range, AND the ULA is accessed (A0 = ...
    mcleod_ideafix mcleod_ideafix January 2009 Hardware
  • Dead microdrive advice plsHi, I recently got a box of bits off ebay, and one of the items is a dead microdrive. Now assuming the motor inside it works (I havnt tried putting…

    ... -solder incase I fry the ULA) what are the likely causes ...
    Paul_esx30 Paul_esx30 January 2009 Hardware
  • Help with faulty +2ahi everyone I'm Nuno from Portugal I think I made poopoo with a 128k +2a motherboard I had spare for testing purposes This motherboard has always …

    ... to 48k I think the ULA is working no?
    the ... ula on amstrads is that square ...
    Nuno2009 Nuno2009 January 2009 Hardware
  • R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…

    ... Res?arch r$...
    The ULA gets very hot.

    ULA ferranti #7, all new electrolytic ... some custom fit heatsinks for ULA, Z80, etc...
    I seem ...
    thomas3120 thomas3120 February 2009 Hardware
  • SRAM replacement for lower 16KSome time ago I wondered if it were possible to replace the lower 16K RAM of a 16K/48K Spectrum with a single SRAM chip. You know, those pesky 4116 D…

    ... issue 4B (rubber keys)
    [*]ULA inside is of type 6C001E ... case with other issue boards, ULA versions, or SRAM types. Right ...
    RetroTechie RetroTechie February 2009 Hardware
  • Component count/modern replacementsThere is a thread/project for replacing the old memory with simms There is also the ULA replacement. There's DEATH's composite replacement. What els…

    ...
    There is also the ULA replacement.
    There's DEATH ...
    dekh dekh February 2009 Hardware
  • Yay. Found an issue 1!I've had a Speccy sitting about the house for a while, unused as it only ran as a 16k (a sticker seal on the casing suggested either a 48k upgrade or…

    ... 1 16k (with the little ULA daughterboard).

    Thing is ...
    liveinabin liveinabin March 2009 Hardware
  • +2 datacorder noise eliminationHello :-) I have recently bought a gray +2, and as expected, it is plagued with the "datacorder noise in sound output" problem. I have found a few …

    ... by motor reaching and destroying ULA if the whole datacorder circuitry ... is wired straight into the ULA without any buffering and a ... the possibility of killing the ULA if the voltage applied exceeds ...
    memrah memrah March 2009 Hardware
  • issue 6a faultyHi All I got issue 6a pcb from ebay with status faulty pcb had bad voltages when I power up I changed tr4 ztx650 and all voltages got back on ic6 I h…

    ... 74ls04 (old one working too), ula working fine - I have 2 ...
    gorski gorski March 2009 Hardware
  • Sprinter 2000A while ago I bought the Sprinter 2000 from the now defunct St. Petersburg-based company Piters Plus. It is one of the last five or so of the 120 or …

    ... IDE disk support.
    The ULA is kept inside an FPGA ...
    wilsonsamm wilsonsamm April 2009 Sales
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Latest Posts

  • I bought an accoustic guitar. How do you play it?
    dm_boozefreek on 7:51PM
  • Goodbye Z80
    zx1 on 7:11PM
  • 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

HitBox

Word Docs Hits
ula 7.3K 13K
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