World of Spectrum
  • Categories
  • Discussions
  • FAQ
  • Sign In
Home › Search
Title Search
@title beer Word 'beer' in title
User Search
  • @user admin Only posts by Admin
Text Search
  • @body beer Word 'beer' in the text
Phrase Search
"Hello World" Exact phrase match
Exclude Terms
  • car -red Search cars that are not red
"Or" Searches
  • honda | bmw 'honda' or 'bmw' results
Multi-Field
@(title,body) hello Both contain 'hello'
WildCard
  • hond* civ* Match all with an astrix
Combination
  • @title bmw @user admin
See more supported syntax examples
Search Again :: Adv Search 1000 results in 0.016s
<1…18192021222324…34>
  • TIPP31 transistor questionYesterday I had the time to try and repair a 4S issue 48k spectrum I had. First of all I replaced all the electrolytic capacitors. The tr4 transistor…

    yes, you can use ZTX214 but why bother when I have sent you a ZTX750 :)

    You only need a general purpose transistor (pnp) for tr5. Tr4 is a different story - but you know then :D
    DEATH DEATH May 2007 Hardware
  • Is Ferranti still alive ?And if not......why should there be any restrictions on manufacturing the ULA ?

    Well.....I can get 4116 RAM, 4164 RAM, LM 1889 and the 74xxx ones.

    The problem seems to be the ULA and the ROM
    Pilsener Pilsener May 2007 Sinclair Miscellaneous
  • 48K Speccy not workingHey, A few months ago (hope it&#180;s not to late) I was loading a game into my speccy and from one moment to another it stopped working! I unplugge…

    ... quid that one of the 4116 lower memory chips has ... check the voltages to the 4116 memory to verify the ... the power supply to the 4116 memory:

    Put ... 16 of one of the 4116 RAM chips.
    Then test ... I'd change out the 4116 RAM for known good memory.
    Winston Winston May 2007 Hardware
  • Problems with TS2068sI bought 2 TS2068s, and this is what's happening: 1st computer: -The tv output doesn't work. The composite video output does* -The '7' key is dead.…

    If the Timex uses 4116 RAM, it probably has a little switch mode power supply to generate the -5v/+12v supply to the memory. It's probably the coil making that noise. The Speccy does that too.
    Winston Winston May 2007 Hardware
  • 48K Speccy not workingHey, A few months ago (hope it&#180;s not to late) I was loading a game into my speccy and from one moment to another it stopped working! I unplugge…

    ... /-5v/+5v supply at the 4116 RAM is a convenient place to ... .

    Incidentally, on bad RAM, don't bet on flashing ... . Don't forget that the 4116 RAM is arranged such that there ... message. All of the faulty 4116 chips in my collection cause ...
    Winston Winston May 2007 Hardware
  • 48K Speccy not workingHey, A few months ago (hope it&#180;s not to late) I was loading a game into my speccy and from one moment to another it stopped working! I unplugge…

    ... check (once again) the lower RAM voltages, because a common component ... (according to the TMS4116 datasheet, 4116 RAM will likely be killed if ...
    Winston Winston May 2007 Hardware
  • problem with sinclair zx 48 issue 6aHi all, I have the following problem when I turn on my sinclair without rom inserted. [url]http://217.79.64.145/sinclair/5.jpg[/url] when I turn o…

    ... use those)
    tr4 = ZTX650, ZXT651 (ebay)
    tr5 = ZTX750, BC213, ZTX213 ...
    gtsamour gtsamour May 2007 Hardware
  • Problems with TS2068sI bought 2 TS2068s, and this is what's happening: 1st computer: -The tv output doesn't work. The composite video output does* -The '7' key is dead.…

    ... ;188287]If the Timex uses 4116 RAM, it probably has a little ...
    odious odious May 2007 Hardware
  • Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…

    ... only fault is lower RAM, it's unlikely you ... 12v/-5v supplies to the 4116 memory, and check the ... />
    Since the 4116 RAM would have likely been damaged ... would desolder all the 4116 RAM and put them in ... fully functional and lower RAM can be completely goosed ...
    Winston Winston May 2007 Hardware
  • Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…

    ... think of where lower RAM has failed in such ... /-5v supplies to the 4116 memory, and check the ...
    [QUOTE]Since the 4116 RAM would have likely been damaged ... would desolder all the 4116 RAM and put them in ... fully functional and lower RAM can be completely goosed ...
    Avian Avian May 2007 Hardware
  • UlaI remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board. It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ? Thanks.

    BTW: My next Speccy project will be to make a small daughterboard that can replace 4532 and 4116 RAM... so if you don't get one soon, all is not lost.
    Winston Winston June 2007 Hardware
  • UlaI remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board. It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ? Thanks.

    ... the 4116 memory must be quite high if the upper RAM could ...
    Winston Winston June 2007 Hardware
  • UlaI remplaced an ULA 6c001-6 by an ULA 6c001-7 chip on issue 3B board. It is "crucial" to remove R32 and adding the 2x NAND gates ??? or not ? Thanks.

    ... the 4116 memory must be quite high if the upper RAM could ...
    Phu Phu June 2007 Hardware
  • Disable onboard memoryWould this work...? Access to onboard I/O can be disabled by holding IORQGE high. Would it be possible to create a MEMRQGE in a similar way to disa…

    The ULA controls the lower RAM (including contention by withdrawing the ... /CAS signal from reaching lower RAM when you want yours paged ... alone - and that way, lower RAM will continue to get refreshed ... /RAS for each row). The 4116 memory only reads or writes ...
    Winston Winston June 2007 Hardware
  • Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…

    ... there's a faulty 4116 (lower 16K RAM) chip. Occasionally, it can ...
    Winston Winston July 2007 Hardware
  • Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…

    Almost certainly the lower 4116 RAM. The ULA normally ... does so because the lower RAM went bad.

    4116 RAM. Refer to the diagram ... of one of the 4116 RAM chips, and check the ... Now try changing out the 4116 RAM. You'll probably find the ...
    Winston Winston July 2007 Hardware
  • Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…

    No don't do that. The lower 16k is the lower left row of 4116 chips. The higher ram chips are of different kind, the one cannot substitute the other.
    You'll probably cause more damage if you do that.
    gtsamour gtsamour July 2007 Hardware
  • Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…

    ... message if any of the 4116 RAM is non-intermittently bad ( ... ve found some instances of 4116 chips that work intermittently ... it's been bad lower RAM. (That's not to ... t cause that, but 4116 RAM doesn't seem to age ... would suggest swapping the 4116 RAM for known good ...
    Winston Winston July 2007 Hardware
  • Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…

    ... ) message if any of the 4116 RAM is non-intermittently bad (i ... 've found some instances of 4116 chips that work intermittently - the ... won't cause that, but 4116 RAM doesn't seem to age ... would suggest swapping the 4116 RAM for known good 4116 first.[/QUOTE]
    DEATH DEATH July 2007 Hardware
  • Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…

    ... it was most definitely the RAM. I also suspected the ULA ... procedure.

    Take your 4116 and bend up the top ... chip in safely into a 4116 socket.

    (What you ...
    Phu Phu July 2007 Hardware
  • Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…

    ... about on here.

    4116 RAM - these hold the contents of ... contains at least one blown 4116 chip. The problems a ... hot. Especially the 4116 RAM chips. Change any 4116 chips that get even ... /> Test the voltages on the 4116 chips and repair the onboard ...
    DEATH DEATH July 2007 Hardware
  • ZX81 power supplyFriend gives me ZX81 without power supply and i want to test whether he work or not. Can i use Spectrum p.supply for that purposes? I dont want to d…

    ... 16K RAM pack (or any other RAM pack that uses the 4116 ICs ...
    Phu Phu August 2007 Hardware
  • Alternative chips for upper RAM blockDoes anybody know of a way to use 4464 chips instead of 4164 for the upper RAM block in a 48K machine? If not 4464 then something a little more avai…

    ... of 4164 for the upper RAM block in a 48K machine ... for both upper and lower RAM. The 4464 is a 4 ... have quadruple redundancy RAM...

    If replacing a 4116, you will ...
    Phu Phu August 2007 Hardware
  • Alternative chips for upper RAM blockDoes anybody know of a way to use 4464 chips instead of 4164 for the upper RAM block in a 48K machine? If not 4464 then something a little more avai…

    ... have quadruple redundancy RAM...

    If replacing a 4116, you will ... was planning a daughterboard for RAM replacement and so as he ... />
    Old Amiga motherboards and RAM expansion cards could be a ... maybe use the extra RAM as a RAM disk of sorts - ...
    DEATH DEATH August 2007 Hardware
  • PC Power supply for SpeccyHi all, after 13 years with out playing spectrum games I am eager to play the old games. Thus I got up to the garret checking my old stuff. Two of m…

    ... Speccies here with the original TR4 etc - working perfectly after 25 ... so.

    If a 4116 is going to go down ... and cheaper to just replace TR4. If you have to re ...
    DEATH DEATH August 2007 Hardware
  • I want to build a new, super spectrum ;-)only kidding Andrew :-) my brain's going at a mile a minute at the moment, so I thought I should put some of the ideas down in case one of them is w…

    ... in turn kills lower RAM, which in turn can ... things if the lower RAM fails in an awkward ... Which in turn kills lower RAM. The TMS4116 datasheet says ... one for lower RAM, one for upper RAM, which use a ... around and replacing perfectly good 4116 and 4532 memory.
    ...
    Winston Winston September 2007 Hardware
  • Speccy just snuffed it while playing 3D Pinball :(I have two speccys but the one I use most has just given up the gost! :-( game froze up and now all I get is flashing patterns and lines:-( Everyt…

    ... /> Most likely a problem with RAM - so far, I've found ... - in the 48K models, the 4116 RAM.
    Winston Winston September 2007 Hardware
  • Speccy just snuffed it while playing 3D Pinball :(I have two speccys but the one I use most has just given up the gost! :-( game froze up and now all I get is flashing patterns and lines:-( Everyt…

    ... /> Most likely a problem with RAM - so far, I've found ... - in the 48K models, the 4116 RAM.[/QUOTE]

    I forgot ... have any other spares like ram chips etc (are they still ...
    +2MAN +2MAN September 2007 Hardware
  • Speccy just snuffed it while playing 3D Pinball :(I have two speccys but the one I use most has just given up the gost! :-( game froze up and now all I get is flashing patterns and lines:-( Everyt…

    ... you've got a duff 4116 lower memory chip. If you ... if it's dead upper RAM the Spectrum will still boot ... supply can also kill lower RAM, and it's a really ... are all present on the 4116 memory (if you have a ...
    Winston Winston September 2007 Hardware
  • Speccy just snuffed it while playing 3D Pinball :(I have two speccys but the one I use most has just given up the gost! :-( game froze up and now all I get is flashing patterns and lines:-( Everyt…

    ... supply can also kill lower RAM, and it's a really ... are all present on the 4116 memory (if you have a ...
    +2MAN +2MAN September 2007 Hardware
<1…18192021222324…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

Related Threads

  • 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…
  • Source of 4116 ramSomeone on eBay was selling 500 pieces of 4116 ram. The auction ended without bids, but he's willing to sell it in lots of 50 now. Someone in Spain a…
  • 4116 ram chipsI need some ram chips to fix my 48k + issue3b, I have done the composite video mod and it works, now i just wanna play games on it but its stuck on r…
  • Inefficient code in ROM, from ram-check to RAM-DONEHere is the inefficient code:<br /> <br /> [CODE]<br /> ;; ram-check<br /> L11DA: LD H,D ; Transfer the top value to the HL registe…
  • Help changing TR4 and TR5Hi all!<br /> Please, help me! :)<br /> I think I'm not understanding the correct pins of TR4/TR5 and the transistors.<br /> So, if anyone know the c…
  • 4116 Ram chip replacements?Hello. I am in the work of gathering replacement parts for my speccy 48k. And I would like to know what chips is good replacement for the 4116 ram ch…
  • 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…
  • 4116 Ceramic Ram ChipsHi all,<br /> <br /> I have a few 4116 Ceramic Ram Chips to sell.<br /> <br /> If you have any interest, please PM.<br /> <br /> Greetings,<br /> Ret…
  • TR4 or TR5?My issue two gives horizontal bars on bootup. Flicking reset takes it to copyright screen though. I measured voltages and got 4,9V, 11,99V and -4,3V.…
  • 65x used but tested and working 4116 RAM chipsFor any repairman: 65x 4116 chips, used but tested and working.<br /> Different brands, but ITT and STC mainly.<br /> <br /> ?25 + postage.<br /> <br…

Related Searches

  • rom to ram
  • modern ram
  • 4116
  • disable uper ram
  • disable upper ram
  • toastrack 12v tr4
  • opus rom ram size
  • opus rom 8k ram 2k
  • opus rom 8kb ram 2kb
  • ram upgrade
  • shadow ram
  • page 7 shadow ram
  • z88dk free ram
  • tr4 calibration
  • issue 2 color tr4 calibration
  • 2a ram
  • ram speed
  • dc converter tr4 tr5 coil
  • converter tr4 tr5 coil
  • ram 4116

Copyright © 2024 World of Spectrum