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Search Again :: Adv Search 1000 results in 0.016s
<1234567…34>
  • Ram test / diagnostic software for 128k?I need a ram test program urgently (as I have to bring this machine into the party place tomorrow) yet I couldn't find any in infoseek by typing "ram…

    I need a ram test program urgently (as I have ... infoseek by typing "ram test" :) And most of the test suites based on ... .

    Are there any ram test suite which runs from ...
    Arda Arda December 2012 Sinclair Miscellaneous
  • How to check the whole memory on a +2 greyHi everybody!!! I suspect that i have a bad memory chip on my +2 Grey. Does anybody know if exist any utility to check the whole memory? Thanks a …

    ... check section of the self-test code from the +3 ... that runs from the test screen after pressing "QAZPLM", ... [code]
    ; Spectrum +2 (not +2A!) RAM test
    ; assemble & run at ... page x" (RAM I/O error)
    [*]"RAM fail: address 0000 ...
    Battle Bunny Battle Bunny January 2013 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…

    ... Interface2/Cartridges/Interface2_RC_TestCartridges.htm"]Offical Test Programs[/URL][/B]
    RAM test from Zorn that you ... asm"]Spectrum +2 (not +2A!) RAM test[/URL][/B] (note that ... tap"]Spectrum +2 (not +2A!) RAM test TAP file[/URL][/B] ( ...
    1024MAK 1024MAK August 2013 Hardware
  • 128K+2A/+3 RAM layoutDoes anybody know how physical RAM is mapped to ZX 128k+2a/+3 address space ? There are four 64Kx4 chips IC4-IC7. IC4-IC5 seems to be contended (vide…

    ... know how physical RAM is mapped to ZX 128k+2a/+3 address ... be contended (video RAM). It would mean RAM banks 4-7
    RAM test program, can be on ROM ...
    kpuchatek kpuchatek July 2011 Hardware
  • General question about electronics I guess... (128k +2a)[Short question] When I very slightly put my finger on top IC15 on my +2A the TV picture becomes crazy and the spectrum acts if it just resets I don…

    ...
    [long question]
    My +2A stopped working and I think ... help
    my +2a stopped working right in front ... many resets sometimes the +2a boots into 48k mode< ... mode I made a simple RAM test that checked ok... at ... 2 ROM chips from another +2a
    I've ...
    Nuno2009 Nuno2009 August 2009 Hardware
  • TESTROM3 - utility/rom for test your ZXHere is TESTROM3 utility as 16kB ROM file + flasher for install this rom to divide eeprom (or mapram mode). Work also on ZX Spectrum without ROM and …

    ... (on ZX128 and +2A/+3 models)
    - test rom use only first ... basic with enable 128kB ram)

    TEST 128kB MEMORY
    =================
    TEST FAST RAM
    =============
    Test only fast ram memory (32768-65535). During test show ...
    velesoft velesoft August 2012 Sinclair Miscellaneous
  • +2A shows test screen and beepsNew day, new problem. A +2A, which seems to be in good condition, shows the colored test screen when powered-up and beeps about once every second. Am…

    ... +2A, which seems to be in good condition, shows the colored test ... second. Am I wrong that +2A/B service manuals are more ...
    schombi schombi October 2013 Hardware
  • Sinclair Spectrum System Test Rom CartridgeSinclair Spectrum System Test Rom Cartridge. [url="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=50224&item=8106735040&rd=1&ssPageName=W…

    Sinclair Spectrum System Test Rom Cartridge.

    [url=" ... Test, a Sound Test, a Colour Test, a Flash Test, a RAM Test and a Soak Test ... interpret the results of each test.

    The cartridge itself ...
    wadsterboy wadsterboy May 2004 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 bit more ... like 1 PRINT
    "test" - it works. But if ...
    Then I did a test where I moved the RAMTOP ... I did a small memory test program above RAMTOP like ... get a long memory test and couldn't enter ...
    Tom-Cat Tom-Cat September 2005 Sinclair Miscellaneous
  • 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
  • +2A PSU test helpIs it possible to test a PSU to see if it is dead any other way than plugging into the computer and the light not coming on/no power? I'd like to fi…

    Is it possible to test a PSU to see if ...
    Evil Stripe Evil Stripe October 2010 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. …

    ... , I had to assume this RAM test was regularly finding a problem ... this test did not decrement a value to zero, the RAM-READ ... highest working RAM location.

    I repeated this test about a ... the memory test successfully went a good way into upper RAM. I ...
    Zorn Zorn April 2012 Hardware
  • Rubber Key RAM - Repair?Hello there everyone! I'm a long-time lurker on here - ROMs, documentation etc. but yesterday I finally ponied up for my own speccy, just like the on…

    ... />
    I carried out the RAM test I found elsewhere on this ...
    KenDoddsDad KenDoddsDad August 2013 Hardware
  • Hooky - hook ZX ROM and rewire RST and NMI to RAM - rantThis is a rather long rant. Not for short tempered. :) The objective is to hook into RST "vectors" and NMI on a Spectrum without affecting the normal…

    ... (incl. Speccy) do a RAM test
    at startup. By ... table before
    the RAM test / it will get overwriten. ... . What if we replace RAM checking
    code with ...
    0x11EA JR Z,test)_2 ; bad value (zero ... "real HL" (where mem test ended)
    0x1203 LD DE ...
    tstih tstih July 2014 Development
  • Seriously weird Issue 2 issue... (RAM-related)Hi guys; I have been trying to fix up my Issue 2 and have run across a bizarre issue that I haven't seen elsewhere in the forums. Hopefully one of …

    ... /> 2. MEMCHK returned 32767, upper RAM fault. UPRAM85 returned 93, so ... "black screen and red bars" RAM test appears, after which the black ...
    Trafferth Trafferth August 2014 Hardware
  • Spectrum +2 (grey) RAM issueHi, I?ve got a ZX Spectrum +2 (grey) with what I think is a RAM issue. I used to be able to load games very reliably by playing converted TAPs and …

    ... what I think is a RAM issue.

    I ... that device is a 128K RAM test firmware.

    When ... I run the test, the screen border colour changes ... ], page 4) means that RAM page 5 has an issue ... broken as well since the test doesn?t seem to ...
    CRNorris CRNorris February 2015 Hardware
  • Spectrum 48k won't start any software but passes all RAM testsI have a rubber key 48k which will not start any software - it appears to work perfectly right up until the end of the tape and the program would sta…

    ... with the upper RAM however on running the soak test on the ... minutes. I also performed the RAM test detailed here http://www.worldofspectrum ... suggestions? Soak test for longer or look for non-RAM related issues?
    britain4 britain4 October 2016 Hardware
  • Spectrum 48+ 4S - Upper RAM issue, and now a self-created problem!I recently picked up a known-flaky spectrum off eBay, to have a bit of fun fixing it and reliving youth. It was labelled as 'keyboard duff, shows…

    ... version of Balford's ram test diagnostics said the whole ... removed all the upper RAM ICs, replaced with sockets ... />
    Given the lower RAM used to be okay, and ... The soldering & sockets test okay with the meter, ... of the data lines test as around 12k to ...
    Paulcatchpole Paulcatchpole December 2016 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, …

    ... RAM faults...[/QUOTE]

    On the +2a and +3 the self-test ... get the results of the RAM test.
    John Elliott John Elliott April 2009 Hardware
  • another faulty zx spectrum +2 to fix!!!Hello to all, I'm new here... I have got a faulty +2 (gray) and start to try fix it... I have read the treads of xaris_sm and Pluto63 as background…

    some little progress after rom ram test fitted in (with the two ... very hot ram installed)...

    this is ... board a +12V +5v (both 2A) generic PSU...

    I ...
    emilen72 emilen72 May 2013 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…

    The official Sinclair/Amstrad RAM test comes on a ... Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm"]RAM test program[/URL] (I should ... will not work for a +2A black, +2B black or ... have seen a pure software RAM test program for 128k machines - ...
    1024MAK 1024MAK August 2013 Hardware
  • DivMMC Enjoy - I'm not enjoying it!My DivMMC Enjoy arrived today. Excitedly I rushed home to plug it into my +2a. I have quite a few SD card/CF solutions for my computers so I know wha…

    ... although it needed two 80ns ram chips on position IC3-IC4 ... -bit IDE interface.
    [B]+2a Z70830 Issue 2:[/B] This ... worked ok and passed all ram test (paul farrow's cartridge ones ... ), but it needed two 80ns ram chips on positions IC5-IC6 ...
    BCH BCH February 2015 Hardware
  • DivMMC Enjoy - I'm not enjoying it!My DivMMC Enjoy arrived today. Excitedly I rushed home to plug it into my +2a. I have quite a few SD card/CF solutions for my computers so I know wha…

    ... it needed two 80ms ram chips on position IC3- ... IDE interface.
    [B]+2a Z70830 Issue 2:[/B] This ... worked ok and passed all ram test (paul farrow's cartridge ... was expecting that the +2A/+3 is also susceptible.
    test on it yet.
    ...
    guesser guesser February 2015 Hardware
  • Are 128K games more likely to crash than 48K ones?Hey, guys. I've been doing some experimenting with various games and even some music demos and apps, and I'm beginning to reach a conclusion that …

    ... switches ROM and/or RAM banks into/out of ... 32K of ‘upper’/‘expansion’ RAM still comes from the other ... set of 64K byte RAM chips.

    ... to load in a diagnostic/RAM test program.

    BTW ... ROMs.

    The +2A, +2B, +3, +3B are ...
    1024MAK 1024MAK February 2022 Games
  • What happens during a reset?I always used to wonder about this, but only thought a bit more about it last night when noticing after all these years what actually happens. Obvio…

    ... during a reset: the entire RAM is set to value 2 ... , why? Is this just a RAM test to make sure all addresses ...
    Gwyn Gwyn February 2006 Sinclair Miscellaneous
  • Problem upgrading 16K SpectrumHello Spec-chums, I've been a long time Commodore user, but also a long-time Speccy admirer (and emulator user). I've recently got hold of a Issue 2…

    ... machine froze on start-up RAM-test, showing a white border and ... any one of the 4164 RAM chips allows it to ... /> I've tried juggling the RAM chips about a bit. Now ... m guessing one of the RAM chips is buggered. Is ... one? Or if not the RAM chip, where else could ...
    Layden Layden October 2008 Hardware
  • 48K Speccy Repair Log.Some people may know my love for writing up my repairs of arcade PCBs on various forums so thought I would do the same for this little fella. Had th…

    ... />
    So on to the RAM test, there are two types, short ... Interface 2 which has a RAM test, the original fault when I ... FFFF and the short ram test failed with "RAM Error @8000 BTS 8 ... ROM cart and running the RAM test finally gave me this..
    Womble Womble August 2010 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…

    ... a 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
  • Issue 2 problemHeres a video of what happens when I fire up an Issue 2 board ive had hanging around for ages, this is with Paul Farrows RAM test cart in btw If this…

    ... , this is with Paul Farrows RAM test cart in btw
    If ... spares but if its lower RAM ill give it a go ...
    Macc Macc November 2012 Hardware
<1234567…34>

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