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Search Again :: Adv Search 1000 results in 0.004s
<1234567…34>
  • ZX Spectrum + Issue 6A Repair attemptHello everybody! I got ZX Spectrum + which doesnt work properly. On power up I can see color mosaic, then paper goes black and i can see thin red ba…

    ... I suspect upper memory block. I dont know how to disable it ... power from IC27 instead to disable upper memory block ?
    emes30 emes30 July 2010 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…

    ... /> Some ZX Spectrum boards have upper ram chips in sockets then ... ZX48 without sockets must be disable upper ram 32kB (for example via ...
    velesoft velesoft January 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…

    ... , it will be in the "upper" RAM (if it is a ... not need to use the "upper" RAM. So sometimes the ROM ... the copyright display before the "upper" RAM fault causes the CPU ... ?
    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…

    ... of IC23, a 74LS32) should disable upper RAM, but I have a ... IC in either lower or upper RAM is jamming one of ...
    balford balford July 2014 Hardware
  • 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
  • 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
  • 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
  • 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 - like ROMCS ... , as then you could selectively disable CPU access to any piece ...
    Jonathan Harston Jonathan Harston June 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…

    Does 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 available than the 4164. Winston? Piters??

    TIA
    DEATH DEATH August 2007 Hardware
  • +3 compositve video out problemToday, I've tried to put a composite video out in my +3. I've built the circuit proposed [url=http://www.secarica.ro/html/plus3_hardware.html#composi…

    ... (I didn't want to disable the RF modulator), but in ... ? A RCA connector in the upper part and some sort of ...
    Zup Zup August 2008 Hardware
  • I cannot disable "Load Disks Automatically" in ZX SpinI want to disable the automatic loading of disks in ZX Spin, but cannot succeed. Every time that setting checks it back on by itself. Is this a bug …

    I want to disable the automatic loading of disks in ZX Spin, but cannot succeed. Every time that setting checks it back on by itself.

    Is this a bug somewhere, or I have to configure something elsewhere ?

    Cristi
    secarica secarica November 2009 Emulators
  • Looking for some 48k RAM (upper 32k bank)Greetings, I was wondering where I could find some upper RAM for a 48k (issue 4A). It's the Texas Instruments TMS4532-20NL4 P8419 (or any compatib…

    Greetings,
    I was wondering where I could find some upper RAM for a 48k (issue 4A).
    It's the Texas Instruments TMS4532-20NL4 P8419 (or any compatible RAM).

    Thanks,
    Thomas
    thomas3120 thomas3120 February 2010 Hardware
  • Spectrum lost upper memoryHi again, I have a Rubber key Spectrum(issue 4S) which lost it's whole upper memory. It's worked okay, but i forgot it on over last night. My son wa…

    ... ) which lost it's whole upper memory. It's worked okay ... another Spectrum which had also upper memory problems. So i wrote ... result 32767. This mean that upper memory is off. I loaded ... game.
    Where is my upper memory?
    lillaolle64 lillaolle64 September 2010 Hardware
  • Whole upper memory lostHi! I own a rubber key Spectrum with 48K RAM. Suddenly it lost it's whole upper memory. All diagnostic programs says that it's 16K model with workin…

    ... it lost it's whole upper memory. All diagnostic programs says ... Spectrums which also have had upper memory problems and the diagnostic ... fault ram. After changing faulty upper memory chips they have worked ... Board is Issue 4S and upper memory chips are TM4532.
    lillaolle64 lillaolle64 October 2010 Hardware
  • Spectrum 48K - upper memory MIAI have recently acquired a ZX Spectrum which, according to the sticker on the bottom, should be a 48K model. It's an Issue 3 board, with upper memory…

    ... an Issue 3 board, with upper memory chips (8xTI4532) and supporting ...
    unholy unholy February 2012 Hardware
  • Difficult to find upper RAM fault.I've recently repaired an issue 3B 48K Spectrum that had a tricky to diagnose upper RAM fault, so I thought I'd post a report of what I found here. …

    ... had a tricky to diagnose upper RAM fault, so I ... from testing lower RAM to upper RAM. Here is an ... right the first byte of upper RAM (32768 ) was tested ... first read from the upper RAM location retrieved the ... . were then established in upper RAM, but the system ...
    Zorn Zorn April 2012 Hardware
  • Spectrum 48K - upper memory problemsHi I have a ZX Spectrum 48K issue 3B which does not see upper memory. On PRINT PEEK 23732+256*PEEK 23733 i got result 32767. POKE 32768,85 and PRINT …

    ... 3B which does not see upper memory.
    On PRINT PEEK ...
    Edward Edward May 2012 Hardware
  • Replacing Upper RAM in 48KHi Folks Well, my fun continues :) After sorting the display issues with this machine I found I couldn't load software meant for 48K machines. Havin…

    ... here it looks like an upper memory fault.

    Before ...
    spookt spookt July 2012 Hardware
  • ZX Spectrum upper RAM module (4532/4164 replacement)Following the [URL="http://zx.zigg.net/LRR/"]lower RAM replacement module[/URL], there have been quite a lot of requests for something similar for th…

    ... for something similar for the upper 32K RAM in a Spectrum ... ) telling me you want the upper RAM module instead or one ... of trailing wires, so the upper RAM module uses almost the ...
    Zorn Zorn July 2013 Sales
  • 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 ... . When I put the upper ram chips back in place ... fine again.

    The upper ram are not on the ... someone that also has the upper ram module be so ... Divide attempts DMA to the upper RAM and uses unusual timings ...
    gtsamour gtsamour September 2013 Hardware
  • Upper case in INKEY$Hi, how I get upper case in INKEY$ ? Is there a POKE ? Thanks.

    Hi,
    how I get upper case in INKEY$ ? Is there a POKE ?
    Thanks.
    catmeows catmeows May 2014 Sinclair Basic
  • Double Buffer UtilityHi Folks, I've been experimenting with double buffering on a 48k Speccy for a small project I'm working on. After reading lots of good advice here…

    ... self.disableInterupts() #3 - Disable Interupts
    self.storeRegisters ... />
    #3 - Disable Interupts
    def disableInterupts( ... hexStr = '0x' + hexStr.upper()
    return(hexStr)
    ...
    KrazyKattapilla KrazyKattapilla August 2014 Development
  • Upper Memory LinksI've got an 1982 Issue Two Spectrum 48k with an upper RAM fault. I've narrowed down the faulty IC and I'm in the process of removing the 8 IC's, sock…

    ... Two Spectrum 48k with an upper RAM fault. I've narrowed ...
    retrogamemart retrogamemart September 2014 Hardware
  • Issue 2 Upper Ram, Loading & ResettingI have a 48k Issue 2 Speccy and for the life of me can't track down what the problem is with it. I initially thought that some of the uppe ram ic's w…

    ... went on to desoldered the upper ram ic's, socketed the ... have then replaced all the upper ram with known good ram ... it cant now be the upper ram as I swapped and ...
    retrogamemart retrogamemart December 2014 Hardware
  • ZX Evolution -- contended memory and raster emulationFresh bleeding update for [url=http://www.nedopc.com/zxevo/zxevo_eng.php]ZX Evolution[/url] [url=https://code.google.com/p/pentevo/source/list]Baseco…

    ... or 128k raster (shown in upper right corner just below time ... or 128k ROM set, first disable tape autostart in "Setup", then ...
    lvd lvd January 2015 Hardware
  • FUSE v1.1.1: How to disable red tape icon down on right side screenDoes somebody know how I can disable the red tape icon down on the right edge of the screen. I use Fuse SDL v1.1.1 on the Raspberry Pi (RetroPie). I …

    ... somebody know how I can disable the red tape icon down ...
    teller teller April 2016 Emulators
  • Howto disable Multiface on SpecEmu for taking native Beta48 Snapshot ?Is there a way to disable MF on SpecEmu for taking native Beta48 Snapshot in CBI-95 Disk Emulation (=Betadisk 48) ? Each time I send NMI Button o…

    Is there a way to disable MF on SpecEmu for taking native Beta48 Snapshot
    in CBI-95 Disk Emulation (=Betadisk 48) ?

    Each time I send NMI Button on SpecEmu, Multiface menu opens...
    Luzie Luzie May 2016 Emulators
  • Spectrum + 128K (Toastrack) Upper caseLooking for the upper part of the case for a Spectrum + 128K.

    Looking for the upper part of the case for a Spectrum + 128K.
    womagrid womagrid August 2016 Wanted
  • Upper memory issueZX Spectrum 48K, issue 2, boots fine. Lower RAM OK. When tested with the new test ROM in the Diagboard, for all upper RAM tests "FAIL" is shown. I…

    ... in the Diagboard, for all upper RAM tests "FAIL" is shown ...
    georgedb georgedb September 2016 Hardware
<1234567…34>

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  • Disable BREAK 128 basicDoes anyone know how to prevent BREAK in 128k basic?
  • Help! BREAK KEY disable?Someone has asked me... Is there a poke or routine to disable the Break key in 128K BASIC?
  • 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…
  • Q. on WinXP logon screen (how to disable?)Aaaargh!<br /> <br /> 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 scre…
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  • Disable onboard memoryWould this work...? <br /> <br /> Access to onboard I/O can be disabled by holding IORQGE high. Would it be possible to create a MEMRQGE in a similar…
  • 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…
  • Problem with replacing all upper memory with 4164 chipsGuys, i have a problem with the high memory of a 4B issue.<br /> <br /> At first the board had OKI chips for high memory and one of them was faulty. …
  • I cannot disable "Load Disks Automatically" in ZX SpinI want to disable the automatic loading of disks in ZX Spin, but cannot succeed. Every time that setting checks it back on by itself.<br /> <br /> Is…
  • Looking for some 48k RAM (upper 32k bank)Greetings,<br /> I was wondering where I could find some upper RAM for a 48k (issue 4A).<br /> It's the Texas Instruments TMS4532-20NL4 P8419 (or …

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