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  • Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…

    Hmmm

    So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing with a little annoying thought "it would be much faster in machine code.. all the cool kids use ...
    wibble wibble August 2013 Development
  • Diodes placed the opposite way in +2A/+3 PCB'sI was just going to report this as a mistake in the schematics drawn by Guesser, but I saw a real board and realize that the schematics are right. […

    ... diodes that isolate the address bus from the keyboard row connector ... -MA7 also drive the address bus for non contended RAM. I ... or only for I/O bus cycles, or .. there's no ...
    mcleod_ideafix mcleod_ideafix September 2013 Hardware
  • New multi-interface for ZXI have in development new interface for ZX Spectrum. PCB size is similar as K-MOUSE interface and on board is CPLD (programmable logic), up to 1MB st…

    ... connector to pins of new expansion connecor (21 I/O pins ... + 2x GND + 2x 5V). For expansion connector will exist some modules ...
    velesoft velesoft September 2013 Hardware
  • Upper RAM replacement module issues with the DivideI got my new upper ram replacement module from Zorn yesterday and seem to be having some issues. When the machine is without the Divide it boots up …

    ... old caps replaced and the expansion port is very clean.
    gtsamour gtsamour September 2013 Hardware
  • Use PLAY without the 128 ROMHere's a little thing I wrote called SoftPLAY: [url]http://www.worldofspectrum.org/forums/showthread.php?t=45259[/url] Now you can use the PLAY comm…

    ... 48K and an external AY expansion, or in USR0 mode, say ...
    chev chev October 2013 Sinclair Basic
  • Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…

    ... connected a Cheetah 32K RAM expansion, Print Peek 23733 showed 255 ...
    schombi schombi October 2013 Hardware
  • 30 years ? Domesdos, not DomestosDomesdos was the working title of the operation system for the Sinclair ZX83 which eventually became QDOS for the Sinclair QL. In a CONFIDENTIONAL (…

    ... high probability that a 512Kbyte expansion will be available at launch ...
    QLvsJAGUAR QLvsJAGUAR October 2013 Sinclair Miscellaneous
  • Graphic card for ZX (with Nemo-Bus)Well, graphic/sound card in fact. Still in prototype, as far as I know. [url]http://speccy-live.untergrund.net/2013/11/ipvc/[/url] [img]http://spec…

    Well, graphic/sound card in fact. Still in prototype, as far as I know.
    [url]http://speccy-live.untergrund.net/2013/11/ipvc/[/url]

    [img]http://speccy-live.untergrund.net/wp-content/uploads/2013/11/ipavc.jpg[/img]

    And the ...
    Yerzmyey Yerzmyey November 2013 Hardware
  • Tricky ZX RepairHello guys, This time I put my hands on a very nice Issue 3 16K, upgraded to 48K. To bertter explain "nice", it is absolutely mint, not a scratch on…

    ... switch on the scope. Floating bus seems to behave okay. DMM ... 's nothing else on the bus. Logic levels on the Z80 ...
    Falco-F8L Falco-F8L December 2013 Hardware
  • 32K Expansion board for issue 1 SpectrumI realise these are as rare as rocking horse poo, but I'd really like to upgrade my issue 1 and use it a bit more than is possible currently. Don't …

    I realise these are as rare as rocking horse poo, but I'd really like to upgrade my issue 1 and use it a bit more than is possible currently.

    Don't mind if it's an original or third-party, or even if it's working.

    Thanks!
    B
    balford balford December 2013 Wanted
  • Interface1Bis CompatibilityI picked up a couple of 'faulty' Spectrum 128 +2/2A to use with my Interface1bis. Luckily both were very fixable, only needing new drive belts and on…

    ... the jumper positions, clean the expansion slots and tried in both ...
    rune rune December 2013 Hardware
  • DivIDE and Printer InterfaceHello, My situation is, i have a DivIDE 2k11 with through zx bus connector for my zx spectrum. Can i also connected a printer interface, for example…

    ... DivIDE 2k11 with through zx bus connector for my zx spectrum ...
    zxklaus zxklaus December 2013 Hardware
  • ****ing Awesome Spectrum Engine (FASE)This is a new engine (sprites, tiles, map) for all ZX Spectrum machines. The engine set ups a runtime enviroment that leave between 24K and 30K byt…

    ... implementation for each machine (floating bus in 48K, shadow screen in ...
    antoniovillena antoniovillena January 2014 Brand new software
  • Using even ports for input?I've been looking for unused ports to use with my clashbasher interface. I understand that the spectrum only considers A0 when decoding its input p…

    ... high byte of the address bus is used to select which ... be any contention on the bus because that's the whole ... a spectrum with a floating bus it should be fine shouldn ... through contention on the data bus? Are there othere models of ... done away with the floating bus.
    Basher Basher January 2014 Hardware
  • Please explain how a Kempston interface circuit works.Can someone help me understand how a Kempston joystick interface works, as I want to design and build my own as an experiment. I understand switches…

    ... is delivered to the data bus. I gather there's some ... , the data on the address bus connections is floating (unconnected), but ... 8 pins of the data bus are connected to +5V or ...
    joefish joefish January 2014 Hardware
  • ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…

    ... IR address put on the bus by the CPU interferes with ... in the last 4T the bus is idle (0xFF). After that ... memory, so it leaves the bus idle for the remaining 228 ...
    Hikaru Hikaru January 2014 Development
  • Cleaning a Currah microslot,Odd one this, I guess... For my main spectrum (my original 16k Issue 3 upgraded to 48k and put into a + case), I am hoping to set up the following c…

    ... , starting from the Spectrum's expansion port:
    1: Currah micro ...
    Simon_Carr Simon_Carr January 2014 Hardware
  • Compact Flash Card In "Memory Mode" - (Help)Hello my fellow WoS'ers I have been developing a Z80 8bit interface with a compact flash card port based on Pera's ZXCF "memory mode" interface for …

    ...
    [COLOR="Blue"][B]Data Bus Signals[/B][/COLOR]
    [code ...
    [COLOR="Green"][B]Address Bus Signals[/B][/COLOR]
    [code ... Z80:[/COLOR] [COLOR="Blue"]Data Bus[/COLOR][/B]
    [code ... Z80:[/COLOR] [COLOR="Green"]Address Bus[/COLOR][/B]
    [code ...
    Zetr0 Zetr0 January 2014 Hardware
  • Expansion slot standardCould anyone tell me which standard does this slot mechanically belongs to?

    Could anyone tell me which standard does this slot mechanically belongs to?
    Vector Vector February 2014 Hardware
  • New Game: "SPECTRA Blitz"Hi! No screenshots because there is still no Windows Emulator that supports SPECTRA advanced graphics modes (I was told, it is too hard to support al…

    ... , SPECTRA is a genial hardware expansion that deserves support and will ...
    LCD LCD February 2014 Brand new software
  • Port $28FF. Why 28?Testing floating bus behaviour for ZXUno, I've found that both Cobra and Arkanoid use this specific 16-bit port: $28FF. What is so special about putt…

    Testing floating bus behaviour for ZXUno, I've found that both Cobra and Arkanoid use this specific 16-bit port: $28FF. What is so special about putting the value $28 in A15-A8 during a read to $FF?

    Thank you very much in advance! :)
    mcleod_ideafix mcleod_ideafix February 2014 Hardware
  • New test for finding missing +2A/+3 ULA timing detailsHello, having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention pattern starts, …

    ... screen bytes. Obviously the floating bus can't be used to ...
    Patrik Rak Patrik Rak March 2014 Emulators
  • 4294967296 pseudo output portsIn an effort to avoid any hardware conflicts with the clashbasher interface I've been looking for an alternative to using the spectrum's ports for ou…

    ... sits passively on the spectrum bus. So the output only and ...
    Basher Basher March 2014 Hardware
  • Something I made in Minecraft...So, this is what I do in my spare time these days (when I'm sure a lot of you will be screaming for me to come back to Speccy-land; I assure you I wi…

    ... input, and the RAM pack expansion connector, I have yet to ...
    The Mighty Dopethrone The Mighty Dopethrone May 2014 Chit chat
  • RS232 on Spectrum 128KDoes anyone actually use the RS232 port on the Spectrum 128K? Is there anything useful that can be done with it? I know about the keypad with the Sp…

    ... 'm working on a 128K expansion for a Spectrum-like machine ...
    rga24 rga24 May 2014 Hardware
  • QL is 30 - Edinburgh - 11th October 2014The Edinburgh QLis30 event is booked for 11th October 2014. This was the date that most people wanted. The venue is the Gyle Hall of the St. Thomas …

    ... Edinburgh Airport and Glasgow. The bus service too and from the ... airport has a bus stop outside the church.
    bus route as the church but ...
    rwap rwap May 2014 Announcements
  • USB Keyboard Interface interest?Hi, I was wondering if anyone else out there is interested in a USB interface for the ZX Spectrum (particularly the rubber key models, though it sho…

    ... , through the opening for the expansion port, to a small box ...
    BarryK BarryK May 2014 Hardware
  • Interesting/Unusual ZX81Hello I am shopping for a ZX81 and while I was browsing Ebay today, I came across one that is described as "having a 64K chip." When I saw the ad t…

    ... it had a 64K RAM expansion but upon closer inspection of ...
    memrah memrah May 2014 Sinclair Miscellaneous
  • New version Emulator ZEsarUX-1.0Hi I have uploaded a new version of my Spectrum/ZX80/ZX81 emulator. This is a major stable version, with real timing for all the models and with hi-…

    ... ZX80/81
    Added idle bus port emulation
    Added option ...
    chernandezba chernandezba May 2014 Emulators
  • what do you get for the spectrum owner who has everything ?I thought this might be of interest to a few of the die hard collectors on here. they are 100% authentic.. I met Mr bubble bus (Sandy) today :) [ur…

    I thought this might be of interest to a few of the die hard collectors on here.

    they are 100% authentic.. I met Mr bubble bus (Sandy) today :)

    [url]http://www.ebay.co.uk/itm/271512837940?[/url]
    fog fog June 2014 Sales
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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

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