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Search Again :: Adv Search 1000 results in 0.015s
<1234567…34>
  • Spectrum RAM Paks...This jogged my memory (excuse the pun!!) : [url]http://cgi.ebay.co.uk/CURRAH-32K-RAM-PACK-BOXED-SINCLAIR-ZX-SPECTRUM_W0QQitemZ150057889352QQihZ005QQ…

    ... put one of these 32K Ram packs on a 48K Spectrum ... internal upper 32k and the RAM pack will be mapped to ... the Spectrums edge connector to disable internal RAM (unlike the ZX81), they ...
    MikeW MikeW November 2006 Sinclair Miscellaneous
  • 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…

    ... with Eprom 27C128
    and uper RAM with 62256 SRAM without any ... socket. I also changed lower RAM with
    2 x 4464 ...
    superfo superfo 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…

    ... with Eprom 27C128
    and uper RAM with 62256 SRAM without any ... socket. I also changed lower RAM with
    2 x 4464 ...
    DEATH DEATH August 2007 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…

    Added two more chip types that work in uper RAM position (IC15 - IC22)
    DEATH DEATH August 2007 Hardware
  • Memory upgrade for ZX Spectrum 16/48This is external memory upgrade for ZX Spectrum models with 16kB ram. Can be connect also to 48kB models, but need remove 8 dram chips (from sockets …

    ... /> Yes, but you must disable internal ram from 32768-65535. (remove dram ... chips from socket or disable memory ...
    velesoft velesoft March 2011 Hardware
  • TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…

    ... ZX Spectrum boards have upper ram chips in sockets then is ... ZX48 without sockets must be disable upper ram 32kB (for example via ...
    velesoft velesoft January 2013 Hardware
  • DivMMC EnJOY!Coming up... [IMG]http://benophetinternet.nl/hobby/vanmezelf/DivMMC_enjoy_first_render.jpg[/IMG]

    ... limit functionality thanks to big ram. (led can be removed). If ... use only 24kB ram(tr-dos emulation is disable because ram 3 is ... not usable as classic ram). As ... and thanks to new extra ram pages will system not limited ...
    velesoft velesoft August 2013 Hardware
  • DivMMC EnJOY!Coming up... [IMG]http://benophetinternet.nl/hobby/vanmezelf/DivMMC_enjoy_first_render.jpg[/IMG]

    ... limit functionality thanks to big ram. (led can be removed). If ... use only 24kB ram(tr-dos emulation is disable because ram 3 is ... not usable as classic ram). As ... and thanks to new extra ram pages will system not limited ...
    bverstee bverstee August 2013 Hardware
  • Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…

    ... to work out where physical RAM finishes. It is not ... CPU needs an area in RAM to store return addresses ... to use the "upper" RAM. So sometimes the ROM program ... display before the "upper" RAM fault causes the CPU to ... br /> Maybe easier to just disable upper RAM ?
    Brian Brian April 2014 Hardware
  • New user with a dead 48k issue 2Hello all I've found my way here from watching some excellent youtube videos by Joulesper Coulomb in an attempt to fix a issue 2 rubber key 48k I bo…

    ... IC23, a 74LS32) should disable upper RAM, but I have a feeling ... in either lower or upper RAM is jamming one of the ...
    balford balford July 2014 Hardware
  • West Bank only running with Kempston Joystick on ZX SpinI can get West Bank [url="http://www.worldofspectrum.org/infoseekid.cgi?id=0005664"]worldofspectrum.org/infoseekid.cgi?id=0005664[/url] only to run w…

    ... an OUT 32765,48 to disable 128k RAM paging because the game ...
    Luzie Luzie April 2017 Emulators
  • Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …

    ... yet replaced the faulty upper RAM chip . I have the ... it says now

    Uper Ram "Value is Unstable"


    Lower RAM error at $7FFF
    Bad ... further both upper and lower ram is bad .

    Suspect ...
    harriusherbartio harriusherbartio March 2020 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…

    ... in a similar way to disable all onboard memory - ... MEMRQ +----+--/\/\/\/---+------>ULA, top 32K RAM
    | | |
    | |
    ... then you could selectively disable CPU access to any piece ...
    Jonathan Harston Jonathan Harston June 2007 Hardware
  • Disable IF1 with switchOk probably silly question time but if you don't ask you'll never know, I have the JS128 which is great and has a jumper on the board to disable the …

    ... jumper on the board to disable the onboard DIVMMC(or whatever ... have to unplug my IF1,Ram Turbo and Ramprint, so i ... switch to the IF1 to disable it and the rest of ...
    thesender thesender March 2017 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
  • Help! BREAK KEY disable?Someone has asked me... Is there a poke or routine to disable the Break key in 128K BASIC?

    Someone has asked me... Is there a poke or routine to disable the Break key in 128K BASIC?
    chaosmongers chaosmongers July 2005 Development
  • Graphic issues with SpinOk, I've always meant to get this sorted out but never did for various reasons that I don't remember at the moment. I get choppy framerates with Spi…

    ... -colour effects, smoothing, and enable/disable (no diff) full screen and ... XP 2.8Ghz, with 512MB Ram, and an ATI Radeon 9600 ... AGP with 128MB Ram. Latest directX (9.0c) installed ...
    Arjun Arjun July 2005 Emulators
  • 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
  • R Register, Contended RAM and ClonesHi. I've had a quick look at the CSS FAQ but didn't spot quite what I'm looking for (also the CSS FAQ doesn't have much detail of the clones - there …

    ... is the effect of contended RAM on the R-register? I ... run any code in contended RAM, but I do make several ... , but then without the contended RAM the HALT would take place ...
    icabod icabod July 2006 Development
  • Z80 -- disable printing?Does anyone know a way (config setting or patch) to disable ZX Printer emulation in Gerton Lunter's Z80 version 4? Without disabling RS232 (print-to…

    ... (config setting or patch) to disable ZX Printer emulation in Gerton ...
    robert@fm robert@fm August 2006 Emulators
  • 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…

    ... this to determine which physical RAM chip needs replacing, and/or ...
    trellis trellis September 2006 Hardware
  • Q. on WinXP logon screen (how to disable?)Aaaargh! I am sitting in front of an annoying computer. It's driving me crazy! How the f-in A does one disable the stinking logon screen (the "cla…

    ... f-in A does one disable the stinking logon screen (the ...
    Skarpo Skarpo September 2006 Chit chat
  • 256K RAM chips in Spectrum 128KSince I have lot of 256K RAM chips, and my 128K has RAM error, I think about replacing all 16 RAM (64K ones) chips with 256K chips. Then it would be …

    ... have lot of 256K RAM chips, and my 128K ... has RAM error, I think about ... replacing all 16 RAM (64K ones) chips with ... be 'Spectrum 512K' - something like RAM in Pentagon.

    ... bank switching of that extra RAM - we need 2 bits ...
    piters piters October 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…

    ... get hold of than Spectrum RAM. I've tried the usual ... dead Spectrums with suspected bad RAM. It'd be nice to ...
    Winston Winston November 2006 Hardware
  • Spectrum RAM Paks...This jogged my memory (excuse the pun!!) : [url]http://cgi.ebay.co.uk/CURRAH-32K-RAM-PACK-BOXED-SINCLAIR-ZX-SPECTRUM_W0QQitemZ150057889352QQihZ005QQ…

    ... ebay.co.uk/CURRAH-32K-RAM-PACK-BOXED-SINCLAIR-ZX- ... with one of these 32K RAM paks!
    My poor ... 16K model with this 32K RAM pak.

    It ... them!

    16K RAM paks were very popular for ...
    itsallgood itsallgood November 2006 Sinclair Miscellaneous
  • Betadisk RAM modificationHello! I've ocassionally found this on the web: [url]http://www.nairam.sk/betadisk.html[/url] [url]http://www.nairam.sk/betadisk_02.gif[/url] Doe…

    ... it adds a little shadow RAM into betadisk to be paged ...
    Sonic Sonic 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…

    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 one, and we got the same result.

    is this a ram fault? How can we check ram chips?
    Arda Arda December 2006 Hardware
<1234567…34>

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  • 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…
  • 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 …
  • RAM Music MachineBoxed RAM Music Machine Sampler (for 48K, Plus, 128K, Plus two)<br /> <br /> includes the tape, microphone, manual, even original mic stand!<br /> <b…
  • 'Valkyrie 17' by Ram JamIf you still need this title, please drop me a line at wadsterboy/AT/hotmail.com.
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  • Help! BREAK KEY disable?Someone has asked me... Is there a poke or routine to disable the Break key in 128K BASIC?
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