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<1234567…34>
  • Error Message on memory testI have just tried PRINT PEEK 23732 + PEEK 23733 * 256 on what I think is a 48K rubber key machine and instead of getting either (a) for a 48k unit…

    ... /> Is this indicative of screwed memory ?
    ADJB ADJB November 2008 Hardware
  • Memory upgradeHi! I bought a 16K rubber key Spectrum. It's said in the box and memory test program also said it's 16K machine. Strange thing is that there is yell…

    ... said in the box and memory test program also said it's ... (so no soldering needed) for memory upgrade. There is also 4 ...
    lillaolle64 lillaolle64 October 2010 Hardware
  • 48K Upper memory issues?Having more issues with the 48K spectrum I just fixed that had the black screen in this thread [URL="http://www.worldofspectrum.org/forums/showthread…

    ... end.

    Ran the memory test
    PRINT PEEK 23732 + PEEK ...
    whoremoan whoremoan November 2014 Hardware
  • Spectrum +2a memoryHi all, Happy New Year. A quick question, I have a Spectrum +2a that I am seeing a very intermittent fault, once every 20 - 30 power ups. I plug…

    ... to fail the lower 16K memory test.

    Does anyone know ...
    bagpuss22 bagpuss22 January 2015 Hardware
  • Longest Speccy Game?Most games were a memory test, 3 lives and back to the start if you failed. Longevity came from repeating the whole thing until you got bored complet…

    Most games were a memory test, 3 lives and back to ...
    Unique Unique February 2005 Games
  • 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…

    ... start to type in the memory test program
    it ... I didn't have 16k memory pack present). AND
    memory test program above RAMTOP like ... NO ERRORS whatsoever - all memory from 19456 o 32767 was ... would get a long memory test and couldn't enter ...
    Tom-Cat Tom-Cat September 2005 Sinclair Miscellaneous
  • 128K Guru requiredThe answer eludeth me, and I seeketh a higher knowledge! I'm in the process of putting together a very simplistic emulation testbench of my laptop s…

    ... . But still, it hangs mid-memory-test.

    I have a ...
    Phu Phu May 2008 Hardware
  • Very simple 128k memory test?Just an idle thought, but... If on a 48K machine: [INDENT][B]PRINT PEEK 23732 + PEEK 23733*256[/B] [/INDENT]yields the last reliable RAM address, …

    Just an idle thought, but...

    If on a 48K machine:

    [INDENT][B]PRINT PEEK 23732 + PEEK 23733*256[/B]

    [/INDENT]yields the last reliable RAM address, then what would be the appropriate command to execute on a 128K/+2/+3 ...
    szeliga szeliga April 2009 Hardware
  • 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…

    ... see thin red bars from memory test. It stops here with black ... ,TR5), so I suspect upper memory block. I dont know how ... IC27 instead to disable upper memory block ?
    emes30 emes30 July 2010 Hardware
  • Opinion: Good game design or bad game design?.. thanks to John Elliot for directing me to this series of videos. The below link is a 12 minute playthrough of part 4 of Grannys Garden on the Spe…

    ... makes it a very good memory test and test of taking notes.
    takapa takapa August 2010 Games
  • Spectrum hangs upWhat might be problem when my ZX Spectrum 48K (rubber keys) hangs up after few minutes play? It had memory problems but i changed (or an expert did i…

    ... few minutes play? It had memory problems but i changed (or ... expert did it;)) the upper memory chips.
    There is no ... up after game load) and memory test programs says that everything is ...
    lillaolle64 lillaolle64 August 2010 Hardware
  • R-Type: Good or horrible?I know, right? R-Type. The jaw-dropping poster child for Speccy brilliance? How could I even suggest such a thing. Well, here's the thing. It is…

    ... route to take. Becomes a memory test. Final boss is a hateful ... shooting becomes secondary to the memory aspects. Boss is a prick ...
    Bluce_Ree Bluce_Ree July 2011 Games
  • 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. …

    ... byte that the ROM's memory test process deemed to be ... the ROM's start-up memory test works. The relevant section of ... starts again, testing the next memory location. Otherwise, the loop ... the logic analyser showed the memory test successfully went a good way ...
    Zorn Zorn April 2012 Hardware
  • Intermittent reset on 48K (issue 4S)I'be been fighting an intermittent selfreset the whole day. Changed ULA - did not help. Tested TR6 as i could and compared the reading with another…

    ... short program. For example RAM test from the archive (which is ... in german). It runs RAM test okay. Nothing bad happens.

    Memory test runs find for a long ...
    ArtemKuchin ArtemKuchin May 2012 Hardware
  • Possible dodgy +2 - resets when loadingSo I have a grey model +2 with a recently refurbed tape deck (new belts and cleaned heads). It might be a product of bad loading, but from what I ca…

    ... this? I suspect there are memory test programs I can use, but ...
    blueowl0708 blueowl0708 August 2013 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 …

    ... boot, the ram passes the memory test i perform with the TESTPROG ...
    gtsamour gtsamour September 2013 Hardware
  • Spectrum +3e acting up...Hello, Well, my Spectrum +3e is starting to act up. All 48k games load fine but now no 128k games will load :/ In one 128k game, in the beginning r…

    ... ROMs, I have some new memory set aside and tried those ... />
    Is there a memory test or ULA test, etc... for the +3 ...
    thomas3120 thomas3120 November 2013 Hardware
  • Born again Speccy user with problemsHello all, Firstly I'd like to say a big hello - this is my first post! When I was 8 or 9 or so my dad bought a ZX Spectrum 48K and a whole bunch o…

    ... />
    I then did a memory test that I found somewhere on ... ]
    [*]Did I do the memory test correctly? Is IC16 my problem ...
    namtip namtip January 2014 Hardware
  • Issue 3 ULA ProblemsI've been given an Issue 3 48k to fix. It was producing no video and no picture on the TV. The coil was buzzing so it was getting power and all the v…

    ... , sound and program loading works. Memory test shows no bad IC's ...
    retrogamemart retrogamemart November 2014 Hardware
  • 48K Not booting properlyBought another faulty spectrum from Ebay. This one, when you turn it on, it looks like it's going to boot OK, but when it gets to the point where it…

    ... then tried to load the memory test program from Zorns website but ... guesing I still have a memory fault somewhere? Anyone got any ...
    whoremoan whoremoan January 2015 Hardware
  • 128k toast rack diagnosisHi - I recently won a 128K toast rack, and have got a Retroleum smart card. I've tried a couple of games and all seems fine...-ish.<div><br></div><di…

    ... /> However, on running the diagnostic test ROM I get a few ... like the membrane?2. 128K Memory test runs through up to bank ... **"
    3. 128k Video page test "Test failed if this text remains ...
    stevebrowne stevebrowne June 2015 Hardware
  • Bizarre ZX Spectrum faults (also possibly relevant to Spectranet compatibility problems).I'm attempting to repair an issue 4A 48K ZX Spectrum and am encountering some very strange problems. For my own records I've given this computer the …

    ... the BASIC portion of the memory test program that was running become ... , though I note that the test program itself never reported finding ... , though, load and run the memory test program again and stopped it ...
    Zorn Zorn February 2016 Hardware
  • Issue with loading on a +2 (Grey)Hello together, I have a problem with my newly aquired (and first ZX Spectrum + 2 Grey). It isn't possible to load any game at all, because the…

    ... flawless.
    - I did a memory test with the TAP File from ... fine and even a soaking test with multiple tries is successful ...
    r3h0k3 r3h0k3 January 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…

    ... , again no problem, did the memory test....oh dear 16k.
    So ... for any info on logic test points in the 48K service ...
    povvercrazy povvercrazy April 2017 Hardware
  • A couple of random questions......because, why not? (1) USR0 mode on the +3/+2A/B I know of its existence, I know how it's used, and I have some games that require it to work o…

    ... - I found a small ZX80 memory test program that holds a small ...
    The Mighty Dopethrone The Mighty Dopethrone March 2020 Sinclair Miscellaneous
  • Built a ZX Spectrum that works, but can't get the upper RAM to work?Like the title says I finished my Spectrum 3B board, and it boots, but it doesn't see the upper 32k of RAM. When it boots, the lower 16k works f…

    ... /> I also tried a simple memory test:
    1 CLEAR 24999
    DistantStar001 DistantStar001 June 2022 Hardware
  • Whats wrong with my spectrum 48 kWhen i startup, instead of copyright messsage i get gray screen with black square in middle.

    But if it is the RAM then it must be the range 16384 to 32768 (?) for it doesn't start and gives wrong values on screen. If it were higher adresses then the Spectrum would start, but will not use all memory due to the memory test.
    Dr BEEP Dr BEEP September 2002 Sinclair Miscellaneous
  • Spectrum problemHi I've just been trying to resurrect my 48k spectrum. I'm having some problems loading some of my games, but if it does completely load, it crashe…

    ... tried the PRINT PEEK 65535 memory test and got a 0 back ...
    clare_bear26 clare_bear26 April 2003 Sinclair Miscellaneous
  • compatibility between ZX computers?Hey all, I'm new here :) I was wondering about compatibility between ZX computers. Is it possible to run a game made for ZX80 on a ZX Spectrum? Or a …

    ... ZX81-ROM and perform the memory test. In the upperbanks #8000-#FFFF ...
    Dr BEEP Dr BEEP July 2003 Sinclair Miscellaneous
  • 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…

    ... . how do I run the memory test from the rom ?

    Tom-Cat Tom-Cat September 2005 Sinclair Miscellaneous
<1234567…34>

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