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<1…13141516171819…34>
  • Shadow ROM partial decoding not implemented in emulatorsOr at least, not implemented in Spectaculator, and it seems that not in Fuse too. [URL="http://www.speccy.org/foro/viewtopic.php?f=8&t=408&start=53"…

    ... main ROM, not floating bus (ULA/FFh), of a mirror of ...
    mcleod_ideafix mcleod_ideafix June 2011 Emulators
  • Spectrum+ fault - lines on boot screen, freezesThe ZX Spectrum+ I bought in the car boot has a fault. When you boot it, it's displaying the Copyright screen, but each character position has a vert…

    ... I don't think the ULA had any reason to be ... it just be that the ULA isn't suitable for it ...
    Muzer Muzer June 2011 Hardware
  • Spectrum 128k+ Toastrack lower Beeper level?Does anyone know the easiest way of matching the AY and beeper levels? I'm guessing perhaps the easiest thing to do is lower the beeper line rather t…

    ... beeper comes out of the ULA and maybe drop the level ... the pin outs of the ULA for the 128k+ anywhere? No ... which pin out of the ULA the beeper comes from and ...
    RobeeeJay RobeeeJay August 2011 Hardware
  • ZXMMC+ emulation added to Z80p48K emulator for the V6Z80p+Hi friends! As time ago I've posted a thread about an FPGA clone for the V6Z80p board, I'd like to give an update about the status of the project. …

    ... described in "The ZX Spectrum ULA: how to design a ... 7MHz, 14MHz (experimental). The original ULA contention algorithm is always applied ... (PAL => PAL ULA, NTSC => NTSC ULA)
    - VGA 50Hz ... 50Hz => PAL ULA, VGA 60HZ => NTSC ULA)

    ...
    adorigatti adorigatti August 2011 Hardware
  • try to fix issue 4 board problemHi I try to fix speccy 48. All voltages are in place, ula 100% ok, cutted +5v from ic25 so far no luck. What next? ROM or upper memory? wojtek (i…

    ... . All voltages are in place, ula 100% ok, cutted +5v from ...
    cyborg50 cyborg50 August 2011 Hardware
  • Spectrum + and +3 Bath! Including SEXY photos!Continuing my "bath" projects: Today I repaired a 48K Spectrum + to working condition, an Issue 4 that is nice and stable. Took 4x Spectrums+ apart …

    ... ensure longer life of the ULA and Z80.

    [IMG ...
    Hedegaard Hedegaard September 2011 Sinclair Miscellaneous
  • Spectrum +128K Toaster Rack & a skanky Spectrum +2A Bath - Incl. naked pictures!Ok, so today was another productive day to complete 2x Spectrums with their baths and assembly. One fat and grey +2A and one sleek sexy 128K The grey…

    ... sink on her pus...uh....ULA!

    [IMG]http://i1193 ...
    Hedegaard Hedegaard September 2011 Sinclair Miscellaneous
  • Is this pure bulls@*t or what?Read [URL="http://www.ebay.co.uk/itm/SINCLAIR-ZX-SPECTRUM-PLUS-48K-REFURB-COMPOSITE-OUT-/170691876340?pt=UK_VintageComputing_RL&hash=item27be0755f4#h…

    ... the composite mod damaging the ULA, cant be true surely
    Macc Macc September 2011 Sinclair Miscellaneous
  • Dead Spectrum+Hi! Any suggestions where to start finding what's broken: Spectrum+ with issue 6A motherboard and nothing on TV. Top row of the upper memory chips g…

    ... hot (all 4) and also ULA. Regulator (7805CV) don't heat ...
    lillaolle64 lillaolle64 September 2011 Hardware
  • Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…

    ... to go from under the ULA to under the CPU.
    ULA pin 37 (A15)
    Pin ... fourth NAND gate) goes to ULA pin 36 (A14)
    Pin ... .e.+5V) will stop the ULA responding to I/O requests ...
    cmonkey cmonkey October 2011 Hardware
  • black +2 go awayHi, All what is my problem if i have the proper voltages inside my black Spectrum +2 black (+5v+12v) in all the important IC's , and not have any vi…

    ... if i put high level ULA go away, but i hope ...
    gorski gorski October 2011 Hardware
  • Little experiment in ULA+Just tried Image 2 ULAPlus and this is the result: View it: [url]http://jbacteria.antoniovillena.es/48s?scarlett.tap[/url] Download it (you must ex…

    Just tried Image 2 ULAPlus and this is the result:

    View it:
    [url]http://jbacteria.antoniovillena.es/48s?scarlett.tap[/url]

    Download it (you must execute in a supported emulator like SpecEmu):
    [url]http://jbacteria. ...
    antoniovillena antoniovillena October 2011 Development
  • Definitive Replay Attendance List 2011There's not too long to go until Replay 2011 in Blackpool, so I thought I would make a separate thread to list WOS members who say they're going to t…

    ... of the definitive ZX Spectrum ULA book, ISBN-13:978-0 ...
    Spector Spector October 2011 Announcements
  • ANN: Tipshop updated Monday, 31 October 2011Monday 31 October 2011 Happy Halloween, SpookChums (groan! Ed) * Fixed a corrupted ZIP file for the downloadable hack for Technician Ted: The Megam…

    ... /> * JP supplied corrections to the Arkanoid hack from YS Smash Tips ...
    hackersanon hackersanon October 2011 Announcements
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... />
    I have verified the ULA (5C112E-3) works by testing ...
    Spectrum and a working ULA from another Spectrum produces the ... back!) It does seem the ULA becomes slightly hotter than usual ... CPU and ROM
    and ULA, with the expected 470ohms resistance ...
    Zorn Zorn November 2011 Hardware
  • Sorry if I've become an irritant, heres another one!Sorry! Box 5 Auf wiedersehen Monty ? Gremlin ATF ? Digital Integration Asterix ? Melbourne House Army Moves ? Imagine Arkanoid ? Revenge of Doh ? Im…

    ...
    Army Moves ? Imagine
    Arkanoid ? Revenge of Doh ? Imagine
    Arkanoid ? Imagine
    Arcticfox ? Electronic Arts< ...
    jamorski jamorski November 2011 Sales
  • ANN: Tipshop updated Wednesday, 30 November 2011Wednesday 30 November 2011 Happy 16th Birthday, World of Spectrum!! * Hippy Smith sent in a huge pile of POKEs (deep breath): Confuzion, Cruising …

    ... as brand new hacks for Arkanoid - Revenge of Doh and a ...
    hackersanon hackersanon November 2011 Announcements
  • New ZX-ULA2An upgraded / replacement ULA for the Sinclair ZX81 is now available. The ZX-ULA2 is a direct replacement for the standard ULA used in the Sinclair …

    An upgraded / replacement ULA for the Sinclair ZX81 is ... direct replacement for the standard ULA used in the Sinclair ZX81 ... home computer.

    The ULA is a custom chip designed ...
    rwap rwap December 2011 Sales
  • Repairing another Issue 2 48K Spectrum.I said at the start of the other thread that I've got another one of these and I've started investigating it. The board is more-or-less exactly the …

    ... they were exactly the same. ULA unplugged, I applied power again ...
    Zorn Zorn December 2011 Hardware
  • ANN: Tipshop updated Saturday, 31 December 2011Saturday 31 December 2011 The last update of the year - Happy New Year when it comes! * GoodBoy sent in a cheat for Wacky Races. * Hippy Smith sen…

    ... Jon North's hack for Arkanoid.

    * Pavel Pl?va ...
    hackersanon hackersanon December 2011 Announcements
  • Faulty Interface one, IF1Dear all, as I have already mentioned in a different thread my IF1 stopped working for no special reason. I went through the service manual and chec…

    ... oscillator at pin 5 from ULA. There is 8Mhz available.
    maskenlos maskenlos January 2012 Hardware
  • Grey +2 video output and oddities.I've been experimenting with one of the above that I acquired years ago, but had just been buried at the back of a cupboard. I've connected it up to…

    ... the transistor that pulls the ULA's /IOREQ line high when ... like this or was the ULA bug corrected for the +2 ...
    Zorn Zorn January 2012 Hardware
  • divIDE x Spectrum clonesAnyone has a Spectrum clone and did a test with divIDE? Here in Brazil we have 2 Spectrum clones (TK90X and TK95) that are almost 95-99% compatible w…

    ... know that our ROM and ULA are slightly different of the ...
    Turrican Turrican January 2012 Hardware
  • Faulty rubber speccy - advice neededHello all speccy hardware gurus :) Recently I moved to a new flat and after a long time have some space (and time) to dig out my old Speccy hardware…

    ... lower ram chips... maybe even ULA...

    Of course, when ... them, and confirmed that the ULA from the faulty mbo worked ...
    deckard deckard January 2012 Hardware
  • SCRplusAnn: SCRplus 0.19, with a user-friendly GUI (based on GTK+). Converts images to ZX Spectrum format. Supports ULA+ format, Timex 8x1 attributes, YUV…

    ... to ZX Spectrum format. Supports ULA+ format, Timex 8x1 attributes, YUV ...
    AY Chip AY Chip January 2012 Development
  • Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…

    ... the basis for understanding the ULA, and all the timing quirks ... of the Spectrum ULA, and the later work Chris ... Smith did to produce the ULA book).

    Some pictures ...
    Winston Winston January 2012 Hardware
  • Collection Worth Saving?Hi, I've recently been reunited with my childhood collection of spectrum items - a boxed +2, original and a couple of Cheetah joysticks, loads of mag…

    ... /> American Football Full Price
    Arkanoid - Revenge of Doh Full Price ... Heels, Cobra, Short Circuit, Frankie, Arkanoid, Wizball, Great Escape, Yie Ar ...
    Repton Roo Repton Roo February 2012 Games
  • Broken +2 (Grey), need helpHello, I got a broken +2, and as I have tons of them working, I want to repair it without fear :D When I power up the machine the I see a horizontal…

    ... /> I replaced the ula first, and tested the ula on another board ...
    Arda Arda February 2012 Hardware
  • SpiffyBecause there aren't enough emulators already... [url=https://github.com/ec429/spiffy]Spiffy[/url] is my 48k Spectrum emulator, for Linux. Right no…

    ... ]

    Right now the ULA timings aren't perfect; to ...
    AY Chip AY Chip February 2012 Emulators
<1…13141516171819…34>

Latest Posts

  • 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
  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade 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
  • 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
    AndyC on April 21

HitBox

Word Docs Hits
arkanoid 1K 1.3K
ula 7.3K 13K

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