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  • 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
  • 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
  • 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
  • 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
  • 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
  • New ZXDS releaseHello, new ZXDS version is ready and will appear on [URL="http://zxds.raxoft.cz"]the site[/URL] in few hours time, so make sure you check back befor…

    ... adding support for the Pentagon timing, I have focused solely on ...
    Patrik Rak Patrik Rak December 2007 Emulators
  • ANNOUNCE: JSW64 Manic Miner: James BondTo celebrate "Two Double-Oh Seven" before it ends, I am delighted to announce the first gamma-release of [i]JSW64 Manic Miner: James Bond[/i] (v1.0),…

    ... -perfect jumps, sometimes with perfect timing. Each room is an intricate ...
    andrewbroad andrewbroad December 2007 Games
  • DRAM (:baffled:)Hi, Can someone explain to me the definitive rules on DRAM access times in terms of suitability for a particular speed of processor? Specifically, …

    ... the exact meaning of accessing timing regarding suitability.

    *drinks ...
    Phu Phu January 2008 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
  • Crystals...Anyone know a source of 14MHz crystals?? I've only been able to find 14.3**** crystals. If I/we want to build more Harlequin's, then we need 14Mhz …

    ... I have to do some timing magic to use slightly faster ...
    csmith csmith February 2008 Hardware
  • Another fusetest runWould anyone with a real machine be prepared to try the latest version of [url=http://www.shadowmagic.org.uk/spectrum/fusetest.zip]fusetest[/url], my…

    ... /Contended_memory#Timing_differences]"early" or "late" timing[/url] machines, but it's ...
    Philip Kendall Philip Kendall March 2008 Hardware
  • 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
  • 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
  • Questions about the Speccy and it's emulationOut of interest, and to raise another interesting discussion, I have some questions about the Spectrum and it's emulation; 1) Is everything known ab…

    ... , as they need such precise timing and border control, but what ...
    ewgf ewgf September 2008 Emulators
  • Your views on Technician TedAnother game the were I first bought for the Spectrum. I liked this game alot. It has very good graphics and sound, much better then JSW. It is a ve…

    ... you had to have perfect timing in some of the tasks ...
    Spectrumplayer Spectrumplayer September 2008 Games
  • The next update of FUSE?Uberjack (author of the great FUSE PSP) tells me that FUSE (PC/Linux) is due to be updated soon. I thought FUSE more or less did everything (except f…

    ... I can see the colour, timing, and border effects work in ...
    ewgf ewgf September 2008 Emulators
  • 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
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