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Search Again :: Adv Search 1000 results in 0.009s
<1234567…34>
  • Another 48k Speccy acting as a 16K model.Hi all, I originally was going to post asking for help to fix the new addition to my family a very nice condition Issue 2 sold on ebay as a 16K model…

    ... presume it was an upgrade (OKI ram chips Btw)
    She passed ... 's where it says for Oki ram to work with a Issue ... IC23 must go to ground..... (OKI ram low enabled)......ahhhhh maybe this ...
    povvercrazy povvercrazy April 2017 Hardware
  • Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …

    ... , are you SURE about the OKI RAM? I seem to remember two ... nototiously bad.

    4164 RAM - well, depends on the price ...
    Lloyd Lloyd October 2005 Sinclair Miscellaneous
  • Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …

    been awhile since I've looked, but I think the OKI ram has different control lines - there are a different set of jumpers to select between types, and another for selecting -3 or -4 4532s.
    GP GP October 2005 Sinclair Miscellaneous
  • Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …

    ... I cannot simply mix OKI and 4164 RAM then?

    I ... a spectrum with bad upper OKI RAM, can you simply replace with ... fit 4164 in place of OKI RAM now knows why it ain ...
    Lloyd Lloyd October 2005 Sinclair Miscellaneous
  • Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …

    ... (Mitsibushi M5K4164ANP -15) in an OKI based issue 2 machine. Works ... !

    There is no RAM (OKI/TI) select jumper in the ... I have seen both OKI and TI RAM (never mixed) used with ... /> Whether 4146 RAM works on other board issues with OKI RAM remains to ...
    Lloyd Lloyd October 2005 Sinclair Miscellaneous
  • 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…

    ... to find a dead 32Kbit OKI Ram Chip in the upper bank ...
    Marcelo Marcelo January 2007 Hardware
  • When is a 16k not a 16k ?Can anyone explain what this machine is supposed to be ? Speccy with a 16K sticker on the base. Doing a peek 23733 returns 255 so a 48K ? Opened …

    ... actually used to adapt the oki ram on the issue two board ...
    Pluto63 Pluto63 September 2013 Hardware
  • Understanding DRAMI think I am going slightly mad. My hardware knowledge has got more rusty than it should have done, and I am going to have to turn to the experts to…

    ... difference between the TI and OKI RAM supported in issue 3 and ... later Spectrums. The RAM type jumper selects whether the ...
    Zorn Zorn September 2013 Hardware
  • Help put this back to 16kSo this issue 2 arrived today and ive opened it up just to nosey and confirm that infact it is an issue 2. Now from the help offered in an earlier po…

    ... a few connections so that OKI RAM will work. The issue 2 ... default only supports TI RAM for the upper RAM.

    If ... this), remove all the upper RAM ICs along with whatever is ... just one of the upper RAM ICs will do the trick ...
    Zorn Zorn August 2014 Hardware
  • Issue 2 Fuzzy LinesHow can I improve this picture? the colors etc are good but the lines are rather annoying... I'd played with VR1/VR2 but apart from making it nice an…

    ... probably already found this, but OKI RAM doesn't work in an ... without modifications....

    TI RAM is the only (4532) type ...
    balford balford September 2014 Hardware
  • Issue 2 Fuzzy LinesHow can I improve this picture? the colors etc are good but the lines are rather annoying... I'd played with VR1/VR2 but apart from making it nice an…

    [QUOTE]but OKI RAM doesn't work in an ... be modded then because the RAM is working perfectly.

    dreamscape dreamscape September 2014 Hardware
  • Damaged S2 IC 26?I'm after more advice, pretty please :) On my S2 board there appears to be a damaged chip, it looks to be IC 26 and is marked as 74LS158PC, it appea…

    ... has been modified to support OKI upper RAM, which by default the ... mods were made to make OKI RAM work in issue 2's ... which i just dropped some OKI RAM into as before it had ...
    dreamscape dreamscape September 2014 Hardware
  • Damaged S2 IC 26?I'm after more advice, pretty please :) On my S2 board there appears to be a damaged chip, it looks to be IC 26 and is marked as 74LS158PC, it appea…

    ... how mine managed to take OKI RAM without any mods.

    dreamscape dreamscape September 2014 Hardware
  • Damaged S2 IC 26?I'm after more advice, pretty please :) On my S2 board there appears to be a damaged chip, it looks to be IC 26 and is marked as 74LS158PC, it appea…

    ... will work as the upper RAM in a Spectrum. However, ... the faulty half). The OKI variation requires a 7 ... up the upper RAM multiplexor wiring and RAM type selection ... of manufacture to use OKI RAM instead and some third ... the multiplexor connections for OKI RAM.
    Zorn Zorn September 2014 Hardware
  • Damaged S2 IC 26?I'm after more advice, pretty please :) On my S2 board there appears to be a damaged chip, it looks to be IC 26 and is marked as 74LS158PC, it appea…

    ... is beyond impressive! :P The OKI RAM in my issue 2 though ...
    dreamscape dreamscape September 2014 Hardware
  • Damaged S2 IC 26?I'm after more advice, pretty please :) On my S2 board there appears to be a damaged chip, it looks to be IC 26 and is marked as 74LS158PC, it appea…

    ... is beyond impressive! :P The OKI RAM in my issue 2 though ...
    Korinel Korinel September 2014 Hardware
  • Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…

    ... factory. It's to allow OKI RAM to be used as upper ... RAM rather than the Texas Instruments ... to select for TI or OKI upper RAM.

    Check for ... or more of the lower RAM ICs. It's a very ...
    Zorn Zorn December 2015 Hardware
  • Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…

    ... "]Also, the upper RAM chips are indeed OKI chips but the Spectrum ... sockets) is set for TI RAM. OKI RAM is supported directly if the ...
    Zorn Zorn December 2015 Hardware
  • Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…

    ... sockets) is set for TI RAM. OKI RAM is supported directly if the ...
    memrah memrah December 2015 Hardware
  • Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…

    ... it was supplied with a RAM upgrade kit, intended for issue ... link could be set for OKI RAM and the IC adaptor not ...
    Zorn Zorn December 2015 Hardware
  • Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…

    ... a simpler high or low RAM type selector, not near the ... it was supplied with a RAM upgrade kit, however. It seems ... -wire the address connections for OKI RAM when the appropriate link could ...
    Zorn Zorn December 2015 Hardware
  • Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…

    ... simpler high or low RAM type selector, not near ... it was supplied with a RAM upgrade kit, however. ... the address connections for OKI RAM when the appropriate link ... remove the socketed upper RAM chips and power it ... can rule out upper RAM failure if the Spectrum ...
    memrah memrah December 2015 Hardware
  • Another 48k Speccy acting as a 16K model.Hi all, I originally was going to post asking for help to fix the new addition to my family a very nice condition Issue 2 sold on ebay as a 16K model…

    OKI RAM is not supported by the ... /> It appears you must have OKI RAM chips which function as fully ... results they produce which upper RAM IC's are faulty.
    balford balford April 2017 Hardware
  • Another 48k Speccy acting as a 16K model.Hi all, I originally was going to post asking for help to fix the new addition to my family a very nice condition Issue 2 sold on ebay as a 16K model…

    [quote="balford;903720"]OKI RAM is not supported by the ... /> It appears you must have OKI RAM chips which function as fully ... results they produce which upper RAM IC's are faulty.[/quote ... could not access any upper ram with pokes, hence this was ...
    povvercrazy povvercrazy April 2017 Hardware
  • Upper RAM replacement module issues with the DivideI got my new upper ram replacement module from Zorn yesterday and seem to be having some issues. When the machine is without the Divide it boots up …

    I got my new upper ram replacement module from Zorn ... manages to boot, the ram passes the memory test i ... When I put the upper ram chips back in place, ...
    The upper ram are not on the "OKI" setting but on ... DMA to the upper RAM and uses unusual timings ...
    gtsamour gtsamour September 2013 Hardware
  • 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 …

    ... ZX81, though.
    3K om RAM, my friends!
    My question ... I tell what size of RAM I've got in my ...
    David David February 2001 Sinclair Miscellaneous
  • HELP 4532 or 4864 RAM wanted !Hello My real spectrum fell off yesterday I know that one RAM memory chip is out of order There was 8 X HM4864P-2 but I saw in the Spectrum schemati…

    ...
    I know that one RAM memory chip is out of ... here to set 16K of RAM so 32K are enough to ...
    patrick delvenne patrick delvenne January 2005 Wanted
  • RAM Music MachineBoxed RAM Music Machine Sampler (for 48K, Plus, 128K, Plus two) includes the tape, microphone, manual, even original mic stand! I last got this wor…

    Boxed RAM Music Machine Sampler (for 48K, ...
    racingroom racingroom March 2005 Sales
  • Boxed 32k Ram packPicked one up a few weeks ago at a car boot sale with a boxed 16k Speccy. Is the ram pack worth anything? Not seen any on Ebay. Thanks in advance, G…

    Picked one up a few weeks ago at a car boot sale with a boxed 16k Speccy. Is the ram pack worth anything? Not seen any on Ebay.

    Thanks in advance, Gnorman
    Gnorman Gnorman June 2005 Sales
  • ZX-81 Ram Pack problemHi! I know this is a ZX Spectrum forum, but I am hoping someone here might be able to help me out... I have posted this to c.s.s. but noone was able…

    ... which is probably normal since ram
    test takes a ... original
    Sinclair ZX 16k ram pack issue 3 .
    ram pack :

    ... a posibility of faulty RAM somewhere on the lower ... />
    Also when no ram pack is present I can ...
    Tom-Cat Tom-Cat September 2005 Sinclair Miscellaneous
<1234567…34>

Latest Posts

  • How Do You Categorize Your Speccy Software and Games?
    harriusherbartio on 11:21AM
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
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    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
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    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
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  • +3 Disk drive motor
    AndyC on April 21

HitBox

Word Docs Hits
oki 148 205
ram 12.6K 21.4K

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  • How do I know the RAM size?Just left my parents after cleaning out my pile of old stuff in their basement.<br /> Know what I found? My old ZX Spectrum.... Those were the days!<…
  • HELP 4532 or 4864 RAM wanted !Hello<br /> <br /> My real spectrum fell off yesterday<br /> I know that one RAM memory chip is out of order<br /> There was 8 X HM4864P-2 but I saw …
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