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  • 128K Spectrum - can't figure out what's wrongLong time no post :) So I have this 128K Spectrum (+2 ROMs) that I cannot for the life of me figure out where the problem lies. Let's take a look a…

    ... .

    Must be the ULA you say? Tried 2 different ...
    Phu Phu December 2014 Hardware
  • ZX Evolution -- contended memory and raster emulationFresh bleeding update for [url=http://www.nedopc.com/zxevo/zxevo_eng.php]ZX Evolution[/url] [url=https://code.google.com/p/pentevo/source/list]Baseco…

    ... /list]Baseconf[/url] -- raster and ULA contended memory emulation for original ...
    lvd lvd January 2015 Hardware
  • Joytsick Interface damaged SpectrumHello All, Sob.. I am a plonker, I did the cardinal sin, I was testing a bunch of joystick interfaces that I got off ebay and one didn't have the ke…

    ... inner, but I checked the ULA and it's fine.
    Korinel Korinel January 2015 Hardware
  • Zero 0.7.1/0.6.6 releasedA quick update with fixes for a bunch of issues: ? Fixed issues in load and save binary dialog boxes (serbalgi) ? Fixed issues with going fullscreen…

    ... ) (0.7.1)
    ? Fixed ULA Snapshot (SZX) not loading correctly ...
    Arjun Arjun January 2015 Emulators
  • ZX Spectrum+ DivMMC EnJOY! Grundig 16" LCD TV and books.The Spectrum is in very good condition. Composite video mod. New mambrane (bought in November 2014 from rwap_software [url]http://www.sellmyretro.co…

    ... , 3 V P-P at ULA pin 28 on executing command ...
    pitu pitu January 2015 Sales
  • What influence the number of stripes during initialization?Hi for All! After some adventures, with other rare old computers I'm back here to my favourite forum. :) Recently I got some ISSUE 2 boards from Ben…

    ... that it depends on the ULA type, but there are two ... have the same 5C112E-3 ULA (dated 8314). One shows four ... eight. As I exchanged the ULA between the boards the number ... the same board, so my "ULA dependence theory" seems to be ...
    jimre jimre February 2015 Hardware
  • Loads of Microdrive cartridges on Ebay plus Vortex RAMI?ll be selling three bundles of eight Microdrive cases with four, used cartridges each, means 32 cartridges per bundle, here?s one of them [img]http…

    ... RAM expansion with CPU and ULA for the Amstrad CPC
    schombi schombi February 2015 Sales
  • Spectrum 48K Ferranti ULAIs there anywhere to get hold of the ICs in the subject? Martin

    Is there anywhere to get hold of the ICs in the subject?

    Martin
    martinw martinw February 2015 Hardware
  • Three Spectrum main boards (Issue Two, 3B and 4A)I will be offering three partially tested Spectrum main boards (Issue Two, 3B and 4A) on Ebay. All boot to the Sinclair (C) message. All fully popula…

    ... populated. Three different flavours of ULA.

    Ebay auction starts ...
    schombi schombi February 2015 Sales
  • New version emulator ZEsarUX-2.1Hi I have uploaded a new version of my ZX80/81/Spectrum/Z88 emulator on http://sourceforge.net/projects/zesarux/ Changes are: Added Cocoa…

    ... /> Fixed Gigascreen colours
    Fixed ULA port reading priority.
    Fixed ...
    chernandezba chernandezba May 2015 Emulators
  • ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…

    ... electrolytics capacitors, TR4 and TR5, ULA - checked, Z80 - checked, ROM - checked ...
    zxuser zxuser May 2015 Hardware
  • Just Speccy 128What about this Serial 001 board?<br><br><a href="http://www.sellmyretro.com/offer/details/4260" title="Link: http://www.sellmyretro.com/offer/detail…

    What about this Serial 001 board?

    http://www.sellmyretro.com/offer/details/4260

    Is complete with all chips (ULA too!!!).

    Wow!!!
    ranma_simon ranma_simon May 2015 Sales
  • Understanding contentionI'm trying to understand contention and its implications when some "weird" bus cycles (such as I/O cycles with I/O addresses in the contended memory …

    ... to be enlarged until the ULA has performed its video memory ...
    mcleod_ideafix mcleod_ideafix May 2015 Hardware
  • New version (v0.31) of ZX DiagnosticsHi all,<br><br>Just wanted to let people know that I've released a new version of the Spectrum Diagnostics into the wild.<br><br>These were originall…

    ... nice features as a rudimentary ULA test, testcard for tuning VR1 ...
    balford balford June 2015 Hardware
  • ZX81 Composite Mod<p>I've done a simple composite mod to my Issue 3&nbsp;ZX81 following a basic schematic I found on one of the ZX81 forums. Mod consists of a BC547, 1…

    ... input from Pin16 of the ULA, 5V, ground and a video ...
    retrogamemart retrogamemart June 2015 Hardware
  • Spectrum+ refurbished by a noob!Sorry if I'm slightly spamming the forum with threads about my Spectrum+, but this is the last one (for now!) as it is all fixed up and I just wanted…

    ... . Attached a heatsink to the ULA. [Thanks [url="http://store.retroleum ...
    Mousey Mousey July 2015 Hardware
  • TV Pal, odd and even framesI have been researching, but haven't found any real interesting information on this subject, so far. What I mean is, since TV PAL signal is interl…

    ... frame (odd or even) the ULA is currently pushing out ?"
    ULA snow effect, and maybe prevent ... external hardware, matching the addresses ULA is fetching at the end ... />
    I have bought the ULA book, but have not started ...
    RMartins RMartins August 2015 Development
  • I feel they could have done this.After reading the ZX Spectrum ULA, I learned about how the ULA detects if the Z80 if going to access memory in the next cycle and stops it if the ULA…

    ... stops it if the ULA also wants to. Thinking ... contended.
    Alternatively, the ULA could provide some interface between ... memory, so that the ULA can read whenever it ... CPU's perspective, the ULA is a "write only" ... not write to the ULA too often (that buffer ...
    wilsonsamm wilsonsamm August 2015 Hardware
  • Interface 1 repair?Can the Interface 1 be repaired? The problem is that it is not recognised by (several) Spectrums, including ones that it worked on the last time I t…

    ... activity.
    Is this a ULA issue in the interface?
    Paul-J Paul-J August 2015 Hardware
  • My experience with a ZX Spectrum clone called Elwro 800 JuniorAfter a long break in using this forum (modellrailroading is my main hobby) I'm back and want to tell something about an interesting ZX Spectrum clon…

    ... functionality of ZX Spectrum's ULA. Please note, that because engineers ... make an exact copy of ULA and as so, there are ...
    brian-82 brian-82 August 2015 Hardware
  • Bit of cosmetic surgerySince my +2's ula gave up loading tapes I decided to get rid of the redundant cassette deck and give the speccy a make over, using some silver wheel …

    Since my +2's ula gave up loading tapes I ...
    madvanman madvanman August 2015 Sinclair Miscellaneous
  • [NEW] Retro Virtual Machine v1.0.0 for OSX released!!!!Here it is! Retro Virtual Machine v1.0.0 RELEASED!!!! Many thanks first to Patrik Rak for the PZX format and for their Z80 tests without which RVM…

    ... to pixel accuracy in the ULA emulation.

    Tape emulation ...
    jcgamestoy jcgamestoy September 2015 Emulators
  • Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …

    ... video modulator ripped out , the ULA and ROM missing as well ...
    harriusherbartio harriusherbartio September 2015 Hardware
  • Help: Not loading anythingBought a ZX Spectrum +, having some problems with it. The ear is not working at all, not even a searching tone (not sure of the correct terminology) …

    ... the IC1 (which is the ULA), this means a useless spectrum ...
    Van_Dammesque Van_Dammesque September 2015 Hardware
  • Replacement speakers for 16/48K SpectrumsThought I'd share a source of replacement speakers for the 16/48K machines: http://uk.rs-online.com/web/p/miniature-speakers/7903975/ (Equivalent…

    ... are driven directly from the ULA (no TR7), so if fitting ... series to avoid loading the ULA ear/mic pin too much ...
    balford balford September 2015 Hardware
  • New version emulator ZEsarUX 3.1Hi I have uploaded a new version of my emulator ZEsarUX on http://sourceforge.net/projects/zesarux I have improved accessibility support, no…

    ... --quickexit

    Fixed Inves ULA Colour Delay. It only affects ...
    chernandezba chernandezba October 2015 Emulators
  • I recapped my 128K toastrack, installed stereo kit and detached audio from video, but...Hello fellow forumers! I'm seeking for help: I've finally decided to change all electrolytic capacitors of my 6U (with all Panasonics 105oC)... Af…

    ... of the stereo kit to ULA pins 34 and 35 was ... sure I didn't heat ULA much. However I may heated ...
    geosiou geosiou October 2015 Hardware
  • My Games and KeymapsI have made available keymap files for all of my game plus re-built a few to support ULA plus (because the Vega uses that and it made a few of them l…

    ... -built a few to support ULA plus (because the Vega uses ...
    Paul-J Paul-J October 2015 Vega
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