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<1…16171819202122…34>
  • Max RAM for ZX Spectrum gamesHow much RAM can be used for single level/whole game? On tape writing.

    How much RAM can be used for single level/whole game?
    On tape writing.
    Tymo6666 Tymo6666 October 2022 Development
  • blew up my 128i did it - damn. i accidentally reverted the polarity of the power power supply, so ended up with a blown 5v stabilizer, which i replaced, but there …

    ... . i am thinking of destroyed tr4 and tr5...

    mark
    mark mark December 2001 Sinclair Miscellaneous
  • Original rubber key 48k'sThis question is to some point academic; But i seem to remeber the original 48k Rubber Keys Speccy came in versions 1,2 & 3! (way back when, occasi…

    ... that one of the transistors (TR4) tends to blow up
    RAM and the appearance of little ...
    Mike Jeanes Mike Jeanes July 2001 Sinclair Miscellaneous
  • How do I know the RAM size?Just left my parents after cleaning out my pile of old stuff in their basement. Know what I found? My old ZX Spectrum.... Those were the days! Never …

    PRINT PEEK 23733
    255 => 48K
    12816K
    x16K with knackered 4116 ram chips(and your lucky it didn't crash at power on)
    john john February 2001 Sinclair Miscellaneous
  • 16k spectrum crash?Hi, I have just been given a spectrum 16k. I plugged it in and it worked, but after turning the machine off and connecting the 32k (cheetah) memory …

    ... of the lower ram has packed in - either 4116 or 5290 IC ... this can fail when the ram packs in.
    GP GP February 2003 Sinclair Miscellaneous
  • OopsToday is a sad day :confused: Poor old rubber keys has gone t**s up. :( All i get is a black screen with a white border. Any body got any ideas …

    ... of the -5v supply, faulty 4116 RAM (lower 16k), faulty ULA, faulty ... upper RAM (4532 32k) and faulty CPU ...
    GP GP March 2004 Sinclair Miscellaneous
  • Ecstasy & AgonyWhile checking out the area around Chennai Central station on Sunday, I came across this crowded narrow road taken up entirely by roadside vendors se…

    ... the -5v supply to the 4116 lower RAM ICs is faulty, or ... one of the lower RAM IC's themselves - I've ...
    GP GP March 2004 Sinclair Miscellaneous
  • Top 10 Games - All Formats (Pre Playstation era)Without being biased only towards Spectrum games what are your favourite 10 games? (Apologies if this has been asked before) My favourites: 1 Sensi…

    ... flow of the game.
    TR4 was the most impressive.. and ... the largest ( ex AOD )
    TR5 WAS PANTS!!! it was marketed ... liked but it was just TR4 GOLD edition. Nothing More ( I ...
    ZX Beccy ZX Beccy July 2004 Games
  • video problem with 128kHi. I bought a 128K (the one with the huge heat sink in the right side) some years ago. Everything seems to work properly except the screen. It doesn…

    ... switching transistors for faults. Check Tr4 and Tr5. I have a amstrad ...
    absorbentgnome absorbentgnome July 2005 Sinclair Miscellaneous
  • nec780 vs z80aHi everyone! Got a 48k issue 2 board with nec780 with a mts2369 at its back.(spider?) Between pin 11 of the cpu and pin 14 of ic 23 theres a resis…

    ... -5v, i measured at the 4116 and theres only -0,4 ... of the -5v at the ram.

    best regards
    odious odious September 2005 Sinclair Miscellaneous
  • How many Speccy's Did U Own?Hey guys, just wondering how many Spectrum's you lot owned???? I had 3....I used to smash them up when I got pissed off on a game...Seriously....tha…

    ... I meant. Actually the 32k ram kit is original I bought ... my original kit (after fixing tr4). The other 16k pcb is ...
    Timppa Timppa November 2005 Sinclair Miscellaneous
  • When is a clone not a clone?If a Spectrum is built from scratch, using new components where available, is it a clone, copy or something else? See, I won an unpopulated Spectrum…

    ... last post that the RAM is 4164/4116. Brand new - I suppose ...
    DEATH DEATH May 2006 Hardware
  • Speccy MTBFHi, Looking at the old (issue 1-2) PCBs, they do look like someone knocked them up in an etching bath/with a soldering iron in their shed but has th…

    ... experience, it's usually the 4116 RAM IC's that go wrong ...
    DEATH DEATH May 2006 Hardware
  • RAM Test ROM?Found a link to this: [url]http://www.retroreview.com/iang/TestSpec4.zip[/url] in another thread, and fired it up in SPIN, but I have no clue how to…

    ... =Timppa]Try piggypacking with working RAM. I had a problem with ... piggybacking. I have plenty of 4116 and 4164 chips "in stock ...
    trellis trellis September 2006 Hardware
  • Where to get Spectrum RAMSigh. Even obsolete nixie tubes seem to be easier to get hold of than Spectrum RAM. I've tried the usual suspects (eBay and google searches), but not…

    4116 RAM chips (for lower 16K of ...
    piters piters November 2006 Hardware
  • Where to get Spectrum RAMSigh. Even obsolete nixie tubes seem to be easier to get hold of than Spectrum RAM. I've tried the usual suspects (eBay and google searches), but not…

    Assuming 4116, Ebay - it's ... co.uk/Williams-Defender-Arcade-4116-ram-chips-NOS_W0QQitemZ190036399869QQihZ009QQcategoryZ3945QQrdZ1QQssPageNameZWD1VQQcmdZViewItem[/url]
    ... use as upper RAM (or 128/+2 RAM) is a ... again.

    4464 RAM for +2a/3 try old ...
    DEATH DEATH November 2006 Hardware
  • Speccy dead? :-(I've been playing around with my Speccy and a Discovery disc drive unit, and tried to do the NMI modification to allow a multiface to be plugged into…

    ... have ULA chips. The 4116/4164 RAM and the ROM are also ...
    DEATH DEATH December 2006 Hardware
  • Speccy dead? :-(I've been playing around with my Speccy and a Discovery disc drive unit, and tried to do the NMI modification to allow a multiface to be plugged into…

    [QUOTE=DEATH] The 4116/4164 RAM and the ROM are also ...
    Winston Winston December 2006 Hardware
  • Nooooo my speccy died!??!!Hi! I am quite sad. :( Tonight I got a kempston interface so I rushed home to try it on my spectrum+ The edge connector of the interface was narrower…

    ... a problem.

    ROM/RAM/Z80 are all possible faults ... available to the RAM. If good, then test the 4116 RAM chips, then ...
    DEATH DEATH December 2006 Hardware
  • Dead Spectrum diagnosis and desolderingI have two dead Spectrums - one I'm pretty sure is caused by bad memory, and the other - well, perhaps a bad ROM, perhaps a bad CPU (it gets halfway …

    ... 74LS157 multiplexer for the upper RAM) on the dead Issue 2 ... /> It could still be your 4116 chips giving problems, and it ... too. If you KNOW your 4116 RAM is ok, try changing the ... shorting out one of the 4116 chips, it could be a ...
    DEATH DEATH December 2006 Hardware
  • Component Equivalents/substitutionsA while ago, I mentioned to somebody in a thread that we should have a list of component equivalents and substitutions so that it's easier to fix our…

    ... 32KB static RAM chip and 74LS00.

    8x 4116 may be ... for +12 and -5V for RAM.

    Last but not ...
    piters piters December 2006 Hardware
  • Component Equivalents/substitutionsA while ago, I mentioned to somebody in a thread that we should have a list of component equivalents and substitutions so that it's easier to fix our…

    ... 32KB static RAM chip and 74LS00.

    8x 4116 may be ... for +12 and -5V for RAM.

    Last but not ...
    DEATH DEATH December 2006 Hardware
  • Nooooo my speccy died!??!!Hi! I am quite sad. :( Tonight I got a kempston interface so I rushed home to try it on my spectrum+ The edge connector of the interface was narrower…

    ... as:

    4116 lower RAM block 90% likely
    ... 4164 upper RAM block 50% likely
    ... voltages present at the 4116 chips before they did ... ok? then check each 4116 chip in turn. If ... />
    Then check upper RAM, then the Z80 and then ...
    DEATH DEATH December 2006 Hardware
  • 48k one dead, one dodgyhello everyone. I have 2 48k spectrum +'s (the one with the QL case). Both boards have issue 3B on them near the speaker. The first will power up …

    ... (particularly the weird supply the 4116 RAM needs - there are no less ...
    Winston Winston December 2006 Hardware
  • 48k one dead, one dodgyhello everyone. I have 2 48k spectrum +'s (the one with the QL case). Both boards have issue 3B on them near the speaker. The first will power up …

    ... in a row. These are 4116 RAM chips. What numbers etc are ... 4532.

    If the 4116 chips are in sockets, bought ...
    DEATH DEATH December 2006 Hardware
  • 48k one dead, one dodgyhello everyone. I have 2 48k spectrum +'s (the one with the QL case). Both boards have issue 3B on them near the speaker. The first will power up …

    ... 8 ram chips, all of them apart from IC11 are old 4116 ... code on it is HYB 4116 P3DH 8322 (looks liek a ...
    chammyman chammyman December 2006 Hardware
  • Black paper, white border. Ram fault?We have a speccy that wont work properly. When we power it up, we get white border around a black screen. We swapped the rom and ula with a working o…

    ... be the Z80, lower RAM or upper RAM.

    The best ... checking the voltages on the 4116 RAM first because you can immediately ...
    Winston Winston December 2006 Hardware
  • Best replacement for ZTX650?What is the best replacement transistor for the obsolete ZTX650? I've read that TIP31 will do the trick. Is there a decent equivalent from the BC or …

    ... draw excessive current - I think 4116 RAM could fail in that way ...
    Winston Winston January 2007 Hardware
  • Spectrum Issue two problemI managed to bring back to life a issue two spectrum (at least the power supply cirquit). The screen is now crystal clear (after replacing all the el…

    ... a couple more things than RAM, but if the machine does ... makes the CPU fill all RAM with 02 hex, then ... , then you have bad lower RAM.

    I had ... replaced the lower eight 16Kx1 RAM chips with a single 64Kx8 ... times. I don't think 4116 chips are easy to get ...
    Marcelo Marcelo January 2007 Hardware
  • Best replacement for ZTX650?What is the best replacement transistor for the obsolete ZTX650? I've read that TIP31 will do the trick. Is there a decent equivalent from the BC or …

    ... remove D15 to see if TR4 blows again. This will eliminate ... an open R59 will make TR5 open wide and send too ... into the base of TR4, which will open TR4 too much, and ... it.

    BTW: Is TR5 getting hot as well ?
    Pilsener Pilsener January 2007 Hardware
<1…16171819202122…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott 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
  • European Software Titles with an English version
    harriusherbartio 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
  • Celebrity deaths...
    mel the bell on April 20

HitBox

Word Docs Hits
ram 12.6K 21.4K
4116 933 1.4K
tr4 886 1.3K
tr5 555 806

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  • 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…
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