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<1…19202122232425…34>
  • So many questions...I'm a regular reader of this forum and everyday I see so many questions people have. Questions regarding technological decisions made in the past. Qu…

    ... the company? How was the ULA designed? Etc., etc.

    georgedb georgedb August 2007 Hardware
  • A few things I want to sharePics of Paul Farrow's custom cartridges, pcb, populated pcbs (each with a different configuration), interface to allow the 48K to emulate the ZX80 an…

    ... a custom Spectrum emulator cartridge (Timex never released one here here ...
    zxbruno zxbruno September 2007 Hardware
  • Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…

    ... on 128k) cycles after the ULA has pulled the INTREQ low ... cycle after it happens). The ULA needs to fetch the screen ... on the bus when the ULA reads them, not later, especially ... a real machine but unfortunately ULA in my beloved 48k died ...
    Patrik Rak Patrik Rak September 2007 Emulators
  • I want to build a new, super spectrum ;-)only kidding Andrew :-) my brain's going at a mile a minute at the moment, so I thought I should put some of the ideas down in case one of them is w…

    ... away from obsolete parts, the ULA is the obvious problem.
    ULA and ram I presume..). what ...
    guesser guesser September 2007 Hardware
  • Broken SpectrumsChaps ( & Mrs Death ), I was looking at getting some dynamic ram chips for the next phase of the Harlequin stuff, and I started thinking...... I've…

    ... />
    I've got the ULA off one of them and ...
    csmith csmith October 2007 Hardware
  • Multiface +3The other Multiface topic has reminded me about this... I may still have this lying about somewhere (although +3 i had at the time is long dead and …

    ... long dead and gone from ULA failure)

    I remember ...
    spider spider October 2007 Hardware
  • ZX80 Collectors may be interested in....[url]http://cgi.ebay.com/Timex-Sinclair-ZX80-Computer-ZX-80-w-rare-software_W0QQitemZ320167933109QQihZ011QQcategoryZ4193QQssPageNameZWDVWQQrdZ1QQcmdZ…

    [url]http://cgi.ebay.com/Timex-Sinclair-ZX80-Computer-ZX-80-w-rare-software_W0QQitemZ320167933109QQihZ011QQcategoryZ4193QQssPageNameZWDVWQQrdZ1QQcmdZViewItem[/url]
    ADJB ADJB October 2007 Sales
  • Ports AccelerationOn ZX48 or 128/+2(grey) is contended and uncontended ports. For example: if you will read 512 bytes sector from IDE device to ZX ram via INI or INIR,…

    ... will contended (slow down by ULA). ULA stop CPU if adress bus ...
    velesoft velesoft October 2007 Hardware
  • ZX Spectrum and (real) B A S I CSometimes ago there was a thread "how spectrum changed your lives". Another thread dealt with "how to copy spectrum screens using basic not using co…

    ... to understand (maybe beside the ULA) and everyone who dealt with ...
    ingo ingo October 2007 Sinclair Miscellaneous
  • Group Order of Internal/External Kempston Turbo InterfacesI have contact Velesoft ([url]http://velesoft.speccy.cz/kmturbo-cz.htm[/url]) about the production of internal or external kempston turbo interfaces …

    ... ,+,128,+2,+2A/+3,Didaktik, Timex 2048 (need internal joy port ...
    Anestis Anestis October 2007 Hardware
  • ZX80 for over $1000[url]http://cgi.ebay.com/Timex-Sinclair-ZX80-Computer-ZX-80-w-original-box_W0QQitemZ320174148675QQihZ011QQcategoryZ4193QQssPageNameZWDVWQQrdZ1QQcmdZV…

    [url]http://cgi.ebay.com/Timex-Sinclair-ZX80-Computer-ZX-80-w-original-box_W0QQitemZ320174148675QQihZ011QQcategoryZ4193QQssPageNameZWDVWQQrdZ1QQcmdZViewItem[/url]

    He reallllly wanted a ZX80
    beanz beanz October 2007 Sinclair Miscellaneous
  • FPGA Spectrum is aliveMy FPGA Spectrum that I started to work on year ago is in 90% ready. I have fixed DDR controller so I can read from it and write to it. I've run som…

    ... .
    I've implemented also TIMEX graphics modes but they aren ...
    brian-82 brian-82 November 2007 Development
  • Who has an Issue 1 or Issue 2 Spectrum??Do you have an Issue 1 or 2 Spectrum (ie machines with 5C102E and 5C112E ULA's) ??? I'm doing a lot of research into the ULA and also the reasoning …

    ... machines with 5C102E and 5C112E ULA's) ???

    I'm ... lot of research into the ULA and also the reasoning behind ... free book "The ZX Spectrum ULA".

    One of the ... the RAS line of the ULA _ever_ go high impedance - this ...
    csmith csmith November 2007 Games
  • Who has an Issue 1 or Issue 2 Spectrum??Do you have an Issue 1 or 2 Spectrum (ie machines with 5C102E and 5C112E ULA's) ??? You're help is needed! PLEASE SEE THIS THREAD: [url]http://www.…

    ... machines with 5C102E and 5C112E ULA's) ???

    You're ...
    csmith csmith November 2007 Sinclair Miscellaneous
  • SCR file Quick Look Plugin for OS X 10.5I got a copy of OS X 10.5 last week, and I spent part of my Diwali holiday writing a Quick Look plugin for SCR files. It works with standard SCR file…

    ... standard SCR files, and the Timex high colour and high res ...
    JamesW JamesW November 2007 Announcements
  • 128 I/O portsIn The Spectrum Hardware Manual there is a small circuit on page 71/72 to allow 128 I/O ports by using IORQ+A7 to override IORQGE, so any I/O access …

    ... with A7=0 prevents the ULA from responding, so freeing ... high, ie, if the ULA is not being selected with ... high to doubly ensure the ULA is not selected. A ... working ULA responds when A0=0, ... and IORQGE=0. A faulty ULA responds when IORQGE=0, ignoring ...
    Jonathan Harston Jonathan Harston November 2007 Hardware
  • The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…

    ... loaded a bit by the ULA, which so I believe consists ...
    Winston Winston November 2007 Hardware
  • Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…

    ... timing. An explanation how the ULA replacement fetches the bytes without ...
    Patrik Rak Patrik Rak November 2007 Emulators
  • 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
  • Synchro-Sette magazine preservationI've just got hold of 6 tapes (out of 13) of the Timex tape magazine Synchro-Sette. Due to a lack of knowledge i'm not sure which machine they actua…

    ... (out of 13) of the Timex tape magazine Synchro-Sette.
    Timex machines are from the states ...
    ADJB ADJB February 2008 MIA/STP/SDP
  • Timex Sinclair TS2068 Speccy emu cartWell I'm cleaning up my retro stuff and and reluctantly parting with my TS2068 emu cart. I was gonna do US shipping only but a bunch of people want …

    Well I'm cleaning up my retro stuff and and reluctantly parting with my TS2068 emu cart.

    I was gonna do US shipping only but a bunch of people want international so if your interested in it let me know and Ill tell you what the shipping is etc ...
    beanz beanz March 2008 Sales
  • Some rare Spectrum stuff I got for saleAnd some not so rare ;P Links to the local auction site (Argentina) where I got them publicized, but you can deal with me privately :) Timex 2068 […

    ... with me privately :)

    Timex 2068
    [url]http://oferta ...
    Akira Akira March 2008 Sales
  • 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
  • Microdrive for ZX81/TS1000Interesting item on Ebay USA...... [url]http://cgi.ebay.com/Timex-Sinclair-1000-Hardware-Stringy-Floppy-Drive_W0QQitemZ130210531368QQihZ003QQcategor…

    Interesting item on Ebay USA......

    [url]http://cgi.ebay.com/Timex-Sinclair-1000-Hardware-Stringy-Floppy-Drive_W0QQitemZ130210531368QQihZ003QQcategoryZ4193QQssPageNameZWDVWQQrdZ1QQcmdZViewItem[/url]
    beanz beanz March 2008 Sales
  • 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
  • MIA books!not sure where to list these... anyway I've found some ZX Spectrum/Spectrum related books that are not listed on WoS (AFAICT) - I'll add more here i…

    ... />
    Exercices pour ZX Spectrum / Timex 2000 (Julien Levy, P.S ...
    ghbearman ghbearman April 2008 Infoseek database
  • 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
<1…19202122232425…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
    AndyC on April 21
  • Celebrity deaths...
    mel the bell on April 20

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