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<1…17181920212223…34>
  • Printers for Spectrum +2 and +3It seems that the only printers availables for ZX Spectrum were ZX printers and compatibles (connected through the expansion bus), but Spectrum +2 an…

    ... through the expansion bus), but Spectrum +2 and +3 had centronics compatible ...
    Zup Zup April 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…

    ... most of the address bus to facilitate bus indirect mode. According to ... supports two parallel modes - bus direct mode (where the chip ... want to access, and address 3 is used to transfer data ... do two LDIRs if necessary). Bus direct mode means accessing registers ...
    Winston Winston November 2007 Hardware
  • Dangerous Allram Mode On +2a / +3ZX Spectrum 128+2A and +3 support allram feature on port 1FFD. On this ZX models is very dangerous set allram if is connect any interface with extern…

    ZX Spectrum 128+2A and +3 support allram feature on port ... both ROMOE signals on ZX bus and connect external memory rom ... /ram to data bus. If in this time is ... is without effect (ZX+2A/+3 can't disconnect ram) and ...
    velesoft velesoft December 2008 Hardware
  • 48K Speccy Repair Log.Some people may know my love for writing up my repairs of arcade PCBs on various forums so thought I would do the same for this little fella. Had th…

    ... spent the last 3 years at least floating round the toyroom ... ... the first test was a bus test, this tells the pseudo ... A14 error. With the bus test passing I moved ... that the databus and address bus were fine, or at ... least the address bus up to the lines ...
    Womble Womble August 2010 Hardware
  • Broken keyboard due to broken ULARecalling csmith's thread about dead ULAs, a thread appeared in the Zonadepruebas (Spanish) forum regarding... a dead ULA, but only a partially dead …

    ... there was weakness driving the bus, in other words that ... ULA puts on the bus wasn't sufficiently strong ... to put the circuit "floating" on top of whatever ... PIN 2 = IORQ;
    PIN 3 = RD;
    PIN 4 = ... tristate buffer plus a 3 input OR gate to ...
    Winston Winston October 2010 Hardware
  • DIVIDE PLUS - ZX bus protectorI make new ZX BUS PROTECTOR for use with DIVIDE PLUS interface. This is very small "convertor" for connection to new ZX BUS connector. PCB contain on…

    ... for connection to new ZX BUS connector. PCB contain only ... possible connect to new ZX BUS any interface (interface 1 ... signals on ZX 128/+2A/+3 is disconnect = external ... Spectrum 128+2A/+2B/+3 with DIVIDE/DIVIDE PLUS ... using allram mode on +3 will work with DIVIDE/ ...
    velesoft velesoft November 2010 Hardware
  • Which do I get? divide or Multiface 3?Hi, Having come back into the scene after s short 20 year break(!) I've obtained a +3 (needs new drive belt),+2 and a toast rack. tapes have been fi…

    ... break(!) I've obtained a +3 (needs new drive belt),+2 ... 3 for the +3 when what I've read about divide+ plus bus ...
    xbomber xbomber June 2011 Hardware
  • SPECTRA - RGB SCART Interface for 48K SpectrumSince the launch of the SPECTRA interface back in June 2012, some discussion of it has appeared in the forums in the past (mainly [URL="http://www.wo…

    ... signals available on the expansion bus. This allows the Spectrum ... , full width gold plated expansion bus.
    [*] A set of ... Disney) [8x1 DE mode] | Mass: Floating City (John Harris) [8x1 DE ... www.alisoneldred.com/thumbsJohnHarris-Prints-3-1.html"]John Harris[/ ...
    Fruitcake Fruitcake April 2013 Hardware
  • New ZX BUS PROTECTOR / +3 FIXER BOARDNew version of ZX BUS PROTECTOR: [URL="http://velesoft.speccy.cz/protector.htm"]http://velesoft.speccy.cz/protector.htm[/URL] [IMG]http://velesoft.s…

    New version of ZX BUS PROTECTOR:
    [URL="http://velesoft ... velesoft.speccy.cz/other/zx-bus-protector/IMGP6977-protector-universal-romoe1top ... php?t=31925&highlight=bus+protector"]http://www.worldofspectrum.org ... php?t=31925&highlight=bus+protector[/URL]
    velesoft velesoft August 2013 Hardware
  • 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 ... remain the same in the +3,... does this mean that ... the +3 gate array outputs the inverted ... MA7 also drive the address bus for non contended RAM. ... or only for I/O bus cycles, or .. there's ...
    mcleod_ideafix mcleod_ideafix September 2013 Hardware
  • Converting a 16K speccy in +3??Yes, you heard right. A new interface to convert a 16Kb speccy into a Spectrum+3 have been developed. [IMG]https://lh6.googleusercontent.com/N2eAoz5…

    ... 16Kb speccy into a Spectrum+3 have been developed.

    - Expansion for the bus.
    - divIDE compatible
    - Add ... a 16Kb speccy in a +3 is the floppy interface. It ...
    wilco2009 wilco2009 December 2014 Hardware
  • Fire Ruby - More HelpI cant pass the spikes in the fire ruby by lawrence creighton, can someone please help? [ This Message was edited by: welsh_brawler on 2003-08-08 21…

    ... and pluck a{6}floating tumbler from the water ... MESSAGE 3
    DONE

    IN BUS AT ...

    IN BUS AT 15
    CARRIED 18 ...
    BadBeard BadBeard August 2003 Games
  • InterruptsCan someone help with providing some info or a link about IM 2. I know I need to create a vector table and want to store this as high in memory as po…

    ... I*256+2/I*256+3. BUT, if odd ids were ... z80 reads whatever is floating on the bus at the time, usually ... $ff was always on the bus when the z80 was looking ... , R reg) on the address bus and this fools the ula ...
    Alcoholics Anonymous Alcoholics Anonymous February 2005 Development
  • Look what I got!Look what I just got in the post: [url]http://www.alioth.net/tmp/W5100.jpg[/url] But, please... don't hold your breath :-) Coming to an edge connec…

    ... /> Various schemes that have been floating through my head include: make ... memory mapped mode versus indirect bus mode doesn't really affect ... lines, and there's only 3 chips).

    But that ...
    Winston Winston October 2007 Hardware
  • Look what I got!Look what I just got in the post: [url]http://www.alioth.net/tmp/W5100.jpg[/url] But, please... don't hold your breath :-) Coming to an edge connec…

    ... /> Various schemes that have been floating through my head include: make ... memory mapped mode versus indirect bus mode doesn't really affect ... lines, and there's only 3 chips).
    [/QUOTE]

    LaesQ LaesQ October 2007 Hardware
  • Benchmark timeWell, the BASIC benchmark posted in Creative Computing back in the 80s came up as a topic on the AtariAge forums. The article is available online an…

    ... simply stating each machine's floating point representation in a table ... compared to the thousands of floating point operations inside the ... may also suffer from some bus contention caused by video refresh ... is no faster than the 3.5MHz Spectrum.

    ...
    Alcoholics Anonymous Alcoholics Anonymous December 2007 Sinclair Basic
  • 48K games that don't work on a +2Not sure if there is already a thread about this but recently I've noticed some old 48K games will not run on my +2 - even in 48K mode. Examples are…

    ... .

    4) The +3 (and therefore +2A/B) modified ... 255 is used the bus is left floating and will pick ... .

    11) The +3/+2A/B models have port ... between the 128/+2 and +3/+2A machines. Annoyingly the ... the 128/+2 and +3/+2A machines. This would ...
    Jimmy Jimmy June 2008 Games
  • My annoying computer threadAs i have just purchased my first computer i thought id start a thread where i can ask you all anoying and possibly simple questions. first off ive …

    ... PC to last at least 3-4 years of heavy gaming ... of dodgy capacitors that were floating around the world at the ... being caused by an obsolete bus, or obsolete processor socket, or ...
    The Starglider The Starglider August 2009 Chit chat
  • Mouse systems for ZX Spectrum[U][B]Mouse systems for ZX Spectrum[/B][/U] Okay, I have been reading the [URL="http://www.worldofspectrum.org/forums/showthread.php?p=688449#post68…

    ... level, or are some floating?[/QUOTE]
    Original old ... button port only 2-3 bits for sign buttons ... button
    D6- joy FIRE 3 / middle button
    D7 ... , Amiga and BBC Micro bus mice)?[/QUOTE]
    Russian ... K-MOUSE clones support 3 buttons and often also ...
    velesoft velesoft March 2013 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…

    ... data on the address bus connections is floating (unconnected), but when ... ” itself electrically from the data bus.
    [/LIST]
    ... method.

    Conditions 3 & 4 are easy. Use ... from the bus), neither low or high, but “floating”, hence ...
    1024MAK 1024MAK 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…

    ... g. the +2A/B and +3 use this method.
    [/ ... on the chip inputs floating to a high level ... is delivered to the data bus. I gather there's ... data on the address bus connections is floating (unconnected), but when ... diodes to "control" data bus bits D5, D6 and D7 ...
    1024MAK 1024MAK January 2014 Hardware
  • Features that are still wanted in Spectrum emulation.Features that are still wanted in Spectrum emulation. 4 USB joystick/gamepad input for real multiplayer games - Yes, Bomb Munchies.... - Sinclair 12…

    ... 55 is due to the +3 and +2A(black) will ... like the +2A and +3. The SAM’s built-in ... two of them with a bus splitter (MGT Two Face, ... another joystick interface and a bus splitter, if you wanted ... knowing which Z80 data bus lines are left floating by the various ...
    zub zub June 2015 Emulators
  • Joystick IssuesHi guys, I'm having a few issues getting joysticks to work well on my Spectrum 128k. I've got a Power Play Joystick interface and I've tried it with…

    ... with a Sinclair +2 or +3).

    Regardless of whether ... data bus at the time. This is either 0xFF (255) the floating ... value of the data bus, or the current ...
    1024MAK 1024MAK July 2017 Hardware
  • Its Saturday, my favourite day, and I'm going to celebrate by playing...[url="https://www.worldofspectrum.org/infoseek.cgi"]Yeti by Cybadyne, 1988[/url] I did a random pick and this is what I got...

    ... .cgi?id=0004383&loadpics=3"]Scumball[/url][/b]

    Bus+Software$"]Starquake[/url]. You play ... caves, is a collection of floating baddies who spawn from a ...
    Luny Luny October 2019 Games
  • New Version of MAME Emulator out with enhancements on Spectrum-EmulationNew Version 0.216 of MAME Emulator out with enhancements on Spectrum Emulation: [url="https://www.mamedev.org/?p=476"]https://mamedev.org/?p=476[/…

    ... .cpp: Improved emulation of bus contention. [holub]
    ... --------------------------------
    -spectrum48: fix floating int (#9637) [holub]
    -spectrum128/2A/3: Improved contention timing emulation ...
    Luzie Luzie May 2022 Emulators
  • +3 disks and pc'sHi, This is my first post, and was wondering if someone could help me. I have some +3 disks from my original +3 that I want to put on my pc to use i…

    ... . I have some +3 disks from my original +3 that I want ... it possible to connect the +3 3" disk drive directly to the ... that say people have got 3" drives connected, but I don ...
    Anonymous Anonymous February 2002 Emulators
  • ZX32 +3 mode software prob?Hi, I was wondering if anyone could assist moi? I downloaded the following file... AmstradPlus3Compilation.dsk.zip However, I cannot get it to ru…

    ... emulator (I set it to +3 mode).

    Can anyone ...
    Dude Dude July 2001 Emulators
  • Formating a Floppys for +3Hello, I have use the zx32 emulator in Spectrum +3 model. i have trying to format a 720 Ko diskfile, but it don't work. I get everytime a 180 Ko of…

    ... the zx32 emulator in Spectrum +3 model.

    i have ... am sure that a spectrum +3 can use the floppys of ...
    Maverick Maverick February 2002 Games
  • Plus 3 Disk ConversionIf anybody wants any commercial +3 disks converted to .dsk format, I've rigged a +3 up to my PC and can make .dsk images of nearly all commercially p…

    If anybody wants any commercial +3 disks converted
    to .dsk ... format, I've rigged a +3 up to my PC and ... nearly all commercially protected +3 disks,
    Alcatraz +3, Three Inch Loader ...
    David David May 2001 MIA/STP/SDP
  • +3 RGB OutI've jus get an +3 that works fine, but i would like to use my CPC RGB monitor with it. Does anybody know something about if it's possible or not?. I…

    I've jus get an +3 that works fine, but i would like to use my CPC RGB monitor with it. Does anybody know something about if it's possible or not?. Is possible to use this signal into a TV with a 21 pin Scart?
    Thanks in advance.
    Luis Antonio Gaite Luis Antonio Gaite February 2002 Sinclair Miscellaneous
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