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  • Upgrading a 16k ZX to a 48kHi First post here (usually on Amiga forums) so hello! I've got a dead 48k ZX Spectrum with a damaged motherboard and a fully working 16k ZX. The 1…

    ... of wire between the corresponding pads.
    mcleod_ideafix mcleod_ideafix October 2010 Hardware
  • ForthTrying to search for FORTH programs and FORTH articles within the forum is proving to be a complete nightmare!! If I search for FORTH in Infoseek I …

    ... right on the Spectrum (ie: pads are 32x32, not a 64x16 ...
    Jimmy Jimmy October 2010 Sinclair Miscellaneous
  • ZX Spectrum+ Problem - Need help -Greetings guys, I bought one ZX Spectrum+. This is what displays on the TV: [IMG]http://d.imagehost.org/0371/17102010_001.jpg[/IMG] When I switch …

    ... working. -5V is OK, DRAM 4116 are readable.

    If ...
    willcz willcz October 2010 Hardware
  • Do ULAs die?Thought I'd start this thread as people often think their ULA is dead, when it's actually the RAM or power circuits. Searching the forum in the futur…

    ... I find it's the 4116 memory and/or the powersupply ...
    guesser guesser October 2010 Hardware
  • Do ULAs die?Thought I'd start this thread as people often think their ULA is dead, when it's actually the RAM or power circuits. Searching the forum in the futur…

    ... the flashing colour blocks, indicating 4116 RAM.

    Perhaps at ...
    csmith csmith October 2010 Hardware
  • Do ULAs die?Thought I'd start this thread as people often think their ULA is dead, when it's actually the RAM or power circuits. Searching the forum in the futur…

    ... power circuit and/or bad 4116 memory seems to be the ...
    Winston Winston October 2010 Hardware
  • Do ULAs die?Thought I'd start this thread as people often think their ULA is dead, when it's actually the RAM or power circuits. Searching the forum in the futur…

    ... switching dc/dc converter. The 4116's survived, as well as ...
    riad riad October 2010 Hardware
  • Feedback need about a platform gameI've developed a few iPhone games based on 8-bit computer games and am now working on a stealth platformer for the iPad. I believe that 8-bit gamepl…

    ... of last resort. Physical D-Pads are excellent but virtual D ... -Pads are tricky for fast-paced ...
    takapa takapa October 2010 Announcements
  • ZX Spectrum+ Problem - Need help -Greetings guys, I bought one ZX Spectrum+. This is what displays on the TV: [IMG]http://d.imagehost.org/0371/17102010_001.jpg[/IMG] When I switch …

    ... working. -5V is OK, DRAM 4116 are readable.[/QUOTE]
    You ... indication that the lower 16K 4116 DRAM is working is that ... 's more likely that the 4116 DRAM is broken, as that ... indicate the Z80. However the 4116 may be affecting the databus ...
    csmith csmith October 2010 Hardware
  • ZX Spectrum+ Problem - Need help -Greetings guys, I bought one ZX Spectrum+. This is what displays on the TV: [IMG]http://d.imagehost.org/0371/17102010_001.jpg[/IMG] When I switch …

    I base my comment on paper picture.
    I am sure that picture come from data in DRAM it is init state of cells in memory, and than ULA is able to read data from 4116.

    You should got same picture when you remove CPU.

    Pavel
    willcz willcz October 2010 Hardware
  • Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…

    ... these new items - instead of 4116 and 4164 memory, it would ...
    Winston Winston November 2010 Development
  • Spectrum +3 doesn't workMy recently ebay purchased +3 arrived today, so I was quite excited to have one again. I plugged it in and all was well, except for a slightly worry…

    ... re-tinning the edge connector pads.

    I lightly sanded ...
    guesser guesser November 2010 Hardware
  • Spectrum +3 doesn't workMy recently ebay purchased +3 arrived today, so I was quite excited to have one again. I plugged it in and all was well, except for a slightly worry…

    ... re-tinning the edge connector pads.

    I lightly sanded ...
    Alien 8 Alien 8 November 2010 Hardware
  • Hacking the O.C.P Full Screen Editor/AssemblerIf you have been reading my posts recently then you will know that I am eager to have the sourcecode I wrote for the Spectrum during the period 1988 …

    ... assembler has fixed columns and pads out characters with spaces in ...
    ASM ASM November 2010 Development
  • New stereo audio board for fitting on AY chip - interested?Hi, I developed a small board that fits on the AY chip inside 128K ZX Spectrums: [IMG]http://www.benophetinternet.nl/hobby/vanmezelf/stereo_audio.j…

    ... ACB by short circuiting the pads of the switch.
    Shortcircuiting ...
    bverstee bverstee November 2010 Hardware
  • Programmable PC joystickI am after a PC compatible joystick that either uses the arrow keys and space as fire or is programmable so I can set it to suit. I would prefer some…

    ... of the buttons/triggers/sticks/pads to be mapped to any ...
    thehive thehive November 2010 Chit chat
  • ZX48K: KILLING keyboard membrane?Hi. My friend - JAD - decided to get back from C64 to ZX Spectrum 48K after some break (that's the man who coded this program [url]http://www.pouet…

    ... the data sheet for the 4116 RAM and test the voltages ... possible that you have dead 4116 memory.
    2. Less likely ...
    Winston Winston November 2010 Hardware
  • Rubber FeetHi All Anybody know where I can my hands on some genuine or good alternative ZX Rubber keyboard type, feet. Thanks.

    Yes I need a +3 rubber foot too. I expect they are interchangeable with +2A/+2B, if not the Grey +2 as well.

    For 48K and Spectrum + I have seen rubber pads from broken joysticks recycled before. Does the job just as well.
    Alien 8 Alien 8 November 2010 Hardware
  • Rubber FeetHi All Anybody know where I can my hands on some genuine or good alternative ZX Rubber keyboard type, feet. Thanks.

    ... a variety of stick on pads/feet.

    So basically ...
    beanz beanz November 2010 Hardware
  • Rubber FeetHi All Anybody know where I can my hands on some genuine or good alternative ZX Rubber keyboard type, feet. Thanks.

    ... a variety of stick on pads/feet.

    So basically ...
    Alien 8 Alien 8 November 2010 Hardware
  • 48k or 16K ?Hi All Something I do not recall, how do you tell a 48k rubber key Spectrum from a 16k ? Thanks for reading

    ... , try to replace the one(4116's) that burns your finger ...
    Arda Arda December 2010 Hardware
  • 48k or 16K ?Hi All Something I do not recall, how do you tell a 48k rubber key Spectrum from a 16k ? Thanks for reading

    [QUOTE=Arda;496503]faulty ram chip(s), as someone pointed out #somewhere, try to replace the one(4116's) that burns your finger when you touch it.[/QUOTE]

    Hi

    Thanks, yes I have resolved the problem :)
    Chris A Chris A December 2010 Hardware
  • I wonder how many still goingThere is always a healthy stock of 48k rubber keyed speccys on eBay. However whats the guess on the amount world wide that are still working/used? +…

    ... to the flakyness of the 4116 memory (possibly exacerbated by the ...
    Winston Winston December 2010 Sinclair Miscellaneous
  • Best built computer ever?All this grumbling about our equipment breaking down or blowing up on the inside,so what is the best built computer?,i looked at some old apple machi…

    ... robust once they stopped using 4116 memory, and the Amstrad built ...
    Winston Winston December 2010 Chit chat
  • Issue 2 Speccy faultHi Guys, I'm really hoping someone can help me with a fault that has just developed on my issue 2 speccy. After perservering for some time with usi…

    ... voltage is reaching the 4116 memory). The 4116 RAM requires 3 voltages ... the -5v will quickly kill 4116 RAM).

    Missing -5v ... /+12v to the 4116 usually indicates TR4 has failed ...
    Winston Winston December 2010 Hardware
  • Dumb question but deep answer wantedWhy is the ram on the 48k made up of 8 chips. Both upper 32k and lower 16k (4116) are set up like this. Taking the 4116 as an example this us a singl…

    ... upper 32k and lower 16k (4116) are set up like this ... . Taking the 4116 as an example this us ...
    guesser guesser December 2010 Hardware
  • Dumb question but deep answer wantedWhy is the ram on the 48k made up of 8 chips. Both upper 32k and lower 16k (4116) are set up like this. Taking the 4116 as an example this us a singl…

    Because a 4116 is organized internally as 16kx1. You supply a 16k address and it pops out 1 bit. You need 8 in parallel to get 8 bits of storage assigned to each 16k address (14 bit address in other words).
    Alcoholics Anonymous Alcoholics Anonymous December 2010 Hardware
  • Issue 2 Speccy faultHi Guys, I'm really hoping someone can help me with a fault that has just developed on my issue 2 speccy. After perservering for some time with usi…

    ... 16K memory chips shorting. These 4116 chips can still be found ...
    Macc Macc December 2010 Hardware
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... 150ns speed rating of the 4116 RAM. DRAM effectively has two ...
    Winston Winston December 2010 Hardware
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... an SRAM (because those antique 4116 RAM chips die like fleas ...
    RetroTechie RetroTechie December 2010 Hardware
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HitBox

Word Docs Hits
4116 933 1.4K
pads 734 942

Related Threads

  • 4116-15NL vs 4116-20NLProbably this has been asked before but I am not finding the answer..<br /> <br /> Can anyone explain the difference between the 15NL and 20NL chips,…
  • Advantage/Disavantage of Joysticks/PadsLong time from my last post... <br /> <br /> I use to play with keys in my speccy (cursors), but now I play games with my ngage phone, so I use pad/s…
  • Wanted 10 - 4116 Ram ChipsHi<br /> Can any one help I am trying to get hold of 10 4116 RAM chips for a 48K Spectrum. Does any one know who might stock them. I can get a minim…
  • 4116 and 4164 chipsI've just found the following supplier for 4116 and 4164 RAM chips.<br /> about $0.80 each.. not bad.<br /> <br /> [url]http://www.jameco.com/[/url]<…
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  • rubber key machine ,pads?the ones used on the bottonm of the PSU and the machine itself.<br /> <br /> no matter how nice the speccy is , i notice the rubber pads are 90% remo…
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