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  • Mouse as Joystick?I've read somewhere that particular mouses can act as joysticks and can be plugged into standard Kempston Joystick port (i.e. on Interface II). Is th…

    I've read somewhere that particular mouses can act as joysticks and can be plugged into standard Kempston Joystick port (i.e. on Interface II). Is this true and which mouse models support this?
    tstih tstih April 2013 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…

    ... interface plugs into the expansion port of the Spectrum and connects ... software via an I/O port. Some of the new display ... not implement support for the ULA+ specification and it is not ...
    Fruitcake Fruitcake April 2013 Hardware
  • Games with time travel in themOn another forum the topic came up about time travel related video games, and it is disappointing how few games involve something as interesting as t…

    ... 360 it's the XBLA port of the N64 game, not ... who doesn't want to read spoilers.
    ewgf ewgf May 2013 Chit chat
  • 16K/48K Lower RAM (4116) replacement.You may want to read [URL="http://www.worldofspectrum.org/forums/showthread.php?t=37957"]this thread[/URL] for background information on the quest t…

    You may want to read [URL="http://www.worldofspectrum.org/ ... 2 Spectrum with a 5C ULA, consideration must be given to ...
    Zorn Zorn May 2013 Hardware
  • Timex 2048 + Interface 2When playing with ZXC3 cartridge (very nice piece of HW from Paul - highly recommended), I connected original Sinclair IF2 to TC2048 and... no joysti…

    ... this is due to different ULA in TC or other elements ... conflict due to internal Kempston port in TC. Let's see ...
    kpuchatek kpuchatek May 2013 Hardware
  • Another Grey +2 problemGot another grey in, weird problems, works pretty much fine until things are attached to the edge connector. So far this is what has been tried; [L…

    ... , 255's on the joystick port
    [*]Multiface 128: Usually works ... any difference, also tried another ULA to no effect. Memory checks ...
    Macc Macc May 2013 Hardware
  • Which ULA?Just a quick question, more of interest rather than immediate need... I am thinking ahead about the repair of an Issue 2 board, and also an Issue 6A …

    ... of which 'may' need replacement ULA chips.

    After a ... sure whether any ZX Spectrum ULA can be used, or whether ... each issue has specific ULA chip requirements. I'd be ... before heading down the new ULA route.

    Cheers,
    Simon_Carr Simon_Carr June 2013 Hardware
  • Contended Memory woes...Hello All, An iccle problem I have and was hoping one of you fine WoSers could bail me out again... :) I've noticed that my emulator is running sli…

    ... read
    RAM read (by byte)
    RAM write (by byte)
    Port read ...
    Port write

    I ...
    Korinel Korinel June 2013 Emulators
  • Interface 1 ULA - what does it do and what not?I heard a rumour a few weeks ago: that the Interface 1 ULA does not control the Microdrive, but mainly the ROM and network. Many of us (like myself)…

    ... that the Interface 1 ULA does not control the Microdrive ... almost always we suspect the ULA.
    So the ... is completely tied to the ULA.
    No question ... it certain that the ULA causes the most problems?< ... ensure it is indeed the ULA that fails mostly?
    bverstee bverstee June 2013 Hardware
  • Spectrum FPGA clone with HDMI video output by Jozsef LaszloThis clone is based upon the ULA core I wrote for opencores.org . It features a scandoubler and HDMI conversion engine. Jozsef has found that a 28MHz…

    ... clone is based upon the ULA core I wrote for opencores ... capable ULAplus device.

    Read his description here:
    [url ...
    mcleod_ideafix mcleod_ideafix July 2013 Hardware
  • Childhood moments with my SpeccyHey everyone. The other day I randomly came across a tumblr page called "Me and My ZX Spectrum" ([url]http://meandmyzxspectrum.tumblr.com[/url]) …

    ... us. We decided the expansion port must be where the tapes ... message on the screen that read: CONGRATULATIONS! You have escaped. Hahahahaha ...
    memrah memrah July 2013 Sinclair Miscellaneous
  • Writing to MIC portSo I had a new crazy idea: How about a stereo beeper engine? Since we can set bit 3 on port $fe to output to MIC, writing such an engine should be ra…

    ... can set bit 3 on port $fe to output to MIC ...
    utz utz August 2013 Development
  • Hardware description - BETA DISK interfaceExist more versions and clones of BETA DISK interface. Beta disk 48, beta disk 128, brasilian clones of beta disk 48, russian clones of beta disk 128…

    ... is set (only writing to port #7FFD work always). This ... br /> [CODE]
    ADRESS WRITE READ
    #1F(31) command ... data

    Control port #FF(255) for write

    Control port #FF(255) for reading
    velesoft velesoft August 2013 Hardware
  • Hardware description - DivIDE interface[B][U]DIVIDE interface / DivIDE 2k11[/U][/B] [B][U]The main description[/U][/B] DIVIDE is IDE interface with own external memory. Thanks to very goo…

    ... and next instruction byte will read from external memory. DIVIDE ... immediately connect and CPU read instructions from external divide ... />
    [B]Divide contol port: #E3(227) - write only[/B ... mode[/CODE]

    Control port function:

    - bits ...
    velesoft velesoft August 2013 Hardware
  • Hardware description - MULTIFACE 3[B]Hardware description - MULTIFACE 3[/B] This is description of MF3 clone, because I can't find more about original interface. Schematic and PAL ch…

    ... button interface detect if CPU read instruction byte from address #0066 ... ) return last data writed to port #1FFD
    - IN #3F3F ( ... ) return last data writed to port #3FFD
    - IN #5F3F ( ... ) return last data writed to port #5FFD
    - IN #7F3F ( ...
    velesoft velesoft August 2013 Hardware
  • MGT MOUSE - exist really ?I read disassembly of +D rom/ram code and from address #2249 is routine for read MGT MOUSE ports. I can't find any info about "MGT MOUSE". Exist real…

    I read disassembly of +D rom/ram ... address #2249 is routine for read MGT MOUSE ports. I can ... BC,#03FF The MGT mouse port?
    224C IN A,(C ...
    225D IN D,(C) Read mouse bits again.
    225F ...
    velesoft velesoft August 2013 Hardware
  • +3 with dead expansion portI bought a +3 from a WoS user. So far, the computer works as expected, but when an interface (e.g. DivIDE (configured correctly) or Multiface3) is co…

    ... at all, so the expansion port seems to be completely dead ...
    schombi schombi November 2013 Hardware
  • Peculiar joystick interfaceAt first glance, these two items look very familiar: [url]http://www.ebay.co.uk/itm/Sinclair-ZX-Spectrum-Vintage-Computer-Joystick-Interface-DK-Tron…

    ... />
    Two DK'Tronics two-port joystick interfaces. I've come ... the Spectrum edge connector to read the high byte of the ... just a one-port interface in a 2-port casing.

    joefish joefish November 2013 Hardware
  • Interesting 48K failureI thought I'd recount a failure I've not seen mentioned before that I saw tonight while fixing a 48K issue 6 board. The background: The initial fail…

    ... menu. The Spectranet monitors port 254 for the border colour ... the Z80.
    3. Intermittent ULA fault (easily testable - since ... preventing the ULA from seeing odd numbered I/O port addresses. This ... was never fixed inside the ULA - TR6 ...
    Winston Winston December 2013 Hardware
  • Quality of component video signals on 48K expansion portHi, What's the quality of the component video signals on the 48K Spectrum expansion port like? Could I directly connect them to three phono sockets…

    ... on the 48K Spectrum expansion port like?

    Could I ...
    mark_k mark_k January 2014 Hardware
  • Modifying port number on M128.Got an MF128 and want to change the page port number from 9F to 5F... I know i would have to change A7 to A6, but to which chip? A bit esoteric I k…

    Got an MF128 and want to change the page port number from 9F to 5F... I know i would have to change A7 to A6, but to which chip?


    A bit esoteric I know, but any ideas gratefully received.

    -Stacey
    Witbear Witbear January 2014 Hardware
  • Timex Compute TC2048 loading problems solvedHi everybody, I've just finally fixed a TC2048 that had numerous problems. Once I'd changed all the RAM, the CPU and the ULA (surface mounted, for a…

    ... RAM, the CPU and the ULA (surface mounted, for added joy ... 0.7V threshold that the ULA uses to detect a tape ... /> So, of course, the ULA just read a logic high all the ...
    Spirantho Spirantho January 2014 Hardware
  • Timex video mode & SamCoupe sound chip.Hi, people! I propose a solution which allows to use sound chip SamCoupe SAA1099 jointly with computers Timex 2048/2068. Everyone knows that these de…

    ... these devices use the same port #FF, and therefore incompatible. As ... ) you must change decoding clone port #FF Timex 2048/2068:
    PORT ADDRESS DECODING
    hex/dec A15 ... A0 A15 ... A0 READ WRITE ... , D1=0 is banned for port #FF Timex 2048/2068.
    Black_Cat Black_Cat February 2014 Hardware
  • 48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …

    I've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working 48k pluses now. :)

    Anyone else come across this?
    owdeuk owdeuk March 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, …

    ... make sure I got the ULA timing 100% right. We know ... reliable information about when the ULA actually fetches the screen bytes ...
    Patrik Rak Patrik Rak March 2014 Emulators
  • ULA pinsHi I am trying to figure out where on the ULA , among other things, the VYU pins are. I have been reading schematics , but I am really lost when I …

    ... figure out where on the ULA , among other things, the VYU ... good description of how the ULA reads from video ram from ...
    micken micken March 2014 Hardware
  • 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…

    ... to n the instruction will read n from memory and then ... to test if the address read from is the same as ... .

    Then the specific port ,within this set of 65536 ... ),n

    Now the port can be written to using ...
    Basher Basher March 2014 Hardware
  • Psycho Pigs UXB review! (a great read)Check out this really great review of Psycho Pigs UXB from the WOS forum's own [URL="http://www.worldofspectrum.org/forums/member.php?u=7000"]Atari_J…

    ... =7000"]Atari_Jetman[/URL]

    read it at [URL="http://www ...
    RetroYak RetroYak March 2014 Games
  • ULA 6C001EX-7Last night I visited a friend of mine and had a look at the ULAs in his Spectrums. He has a 5C102E 8220 in a 16K issue one, a 5C112E 8237 in a 16K is…

    ... issue one (definitely a replacement ULA, there was evidence of where ... />
    He also had a ULA I had never seen before ...
    rga24 rga24 April 2014 Hardware
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Latest Posts

  • I am currently watching.....
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    John Elliott on April 21
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