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Search Again :: Adv Search 1000 results in 0.099s
<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
  • 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…

    Does anybody know how physical RAM is mapped to ZX 128k+ ... be contended (video RAM). It would mean RAM banks 4-7
    are mapped to IC4-IC5 and 0 ... . I am also looking for RAM test program, can be on ROM ...
    kpuchatek kpuchatek July 2011 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. …

    ... be faulty. I usually found 0 or 2, but sometimes 32 ... , I had to assume this RAM test was regularly finding a problem ... highest working RAM location.

    I repeated this test about a ... written a little machine language test routine and perhaps that would ...
    Zorn Zorn April 2012 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 …

    ... basic with enable 128kB ram)

    TEST 128kB MEMORY
    =================
    0=black).
    If detect bad ram then show ... /> TEST FAST RAM
    =============
    Test only fast ram memory (32768-65535). During test show ...
    velesoft velesoft August 2012 Sinclair Miscellaneous
  • 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…

    ... table before
    the RAM test / it will get overwriten. ... /> 0x0001 XOR A ; A=0
    0x0002 LD DE,#0xFFFF ... 0x11EC DEC (HL) ; 1-1=0
    0x11ED JR Z,uploop ... 0x11FD INC B ; B /prev. 0/ = B + 1
    0x11FE ... JR Z,1219 ; B is 0? (not initially)
    0x1200 ...
    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 …

    ... taken so far:

    0. Single-wire composite mod - successful ... /> 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
  • On a 48K issue 6A......how can i isolate the 32K block? I want to test if there is any fault on the 4116's , leaving the 4532's out of the equation. Will removing the …

    ... to run the lower RAM?

    Test TR3, that'll make ... the lower RAM appear dodgy if ... />
    Test IC28 74LS04 too.[/QUOTE]

    The lower ram voltages ... voltages are off (more than 0.5v, and the chip will ...
    odious odious March 2007 Hardware
  • Group Order of Internal/External Kempston Turbo InterfacesI have contact Velesoft ([url]http://velesoft.speccy.cz/kmturbo-cz.htm[/url]) about the production of internal or external kempston turbo interfaces …

    ... reset port 23 and set ram page 0 with write protect. If ... RESIDOS is install to other MB02 ram ... from page 0 and user can't return to correct ram page ... B,A
    AND 192 ;test danger value for hardware reset ...
    velesoft velesoft May 2008 Hardware
  • Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …

    ... then a second full RAM test by writing $00 and ... from the first 0.5K of screen RAM, where it resides ... anyway. (The above 80K test program only tests memory ... my program does not test extra RAM of the 80K ...
    It does not test 128K RAM.

    Once one ...
    Digital Prawn Digital Prawn January 2009 Games
  • Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …

    ... first does a preliminary test to determine if the ... and then a second full RAM test by writing $00 and ... failure modes of Spectrum RAM with that test. I have found ... alternate bits to 1 and 0). Note you can't ... the inversion test will be different (IIRC the RAM is 4 ...
    Winston Winston January 2009 Games
  • Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …

    ... /> Today I used PASMO 0.54 BETA again, since I ... . Just don't use version 0.53 :D

    RAM test routine today but my ... Added features:-
    BIT FADE test using inversion pattern.
    ... when running BIT FADE test - with barcode display ...
    Digital Prawn Digital Prawn January 2009 Games
  • Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …

    ... /> DB "16/48K RAM tester V1.3",0
    String2
    ... "48K RAM",0
    String3
    DB "LOOP $0000 - Test Passed",0
    ... String4
    DB "LOOP $0000 - Failed at $0000",0 ... to see other people's RAM test programs as well.
    < ...
    Digital Prawn Digital Prawn January 2009 Games
  • Test ROM Cartridge For SaleI'm selling another load of gear including a Sinclair Research Test ROM Cartridge. [url]http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=4000772…

    ... .

    6. The RAM Test.
    The RAM Test tests every location with ... indicate that the RAM refresh is not functioning properly - test blocks are ... or faint.

    0. The RS232 Test.
    Self explanatory. Check ...
    murtceps murtceps October 2009 Sales
  • 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…

    ... else changed the jumper to test if that worked.
    ... 16K page, so the RAM test that the ROM performs at ... with a test program specially written to test the low ... It's a very simple test, which involves LDIR'ing ... the chip responsible of bit 0 is faulty, the screen ...
    mcleod_ideafix mcleod_ideafix August 2010 Hardware
  • Speccy2010 - pentagon emulation using GlukIs anyone here familar with Speccy2010 (FPGA Russian Sinclair Spectrum clone). ? I'm using Pentagon mode on Speccy2010 (it uses something called Glu…

    ...
    RESET+two keys = keyboard test
    RESET+S = RTC setup ...
    RESET+C = RGB color test screen
    RESET+U = reset ... /> R = start Real Commander from ram page #17 (if this page ... /> ALL PAGES = erase 1MB ram
    CACHE 0-#65 = erase mem pages ...
    velesoft velesoft May 2011 Hardware
  • Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…

    ... 't deviate more than 0.01v so they seem ... with incrementing values from 0 to 255 and then ... , thereby doing a rudimentary ram test. I assembled it to ... to believe that upper ram is definitely suspect. Unfortunately ... address for a bad test or whether it gives ...
    cmonkey cmonkey October 2011 Hardware
  • Problems with my +3Hello everybody :) I, after almost 2 years, am back in spain and I was able to plug my +3 and play. The thing was going quite good until I inserted …

    ... QUOTE=orange;630009]I'd test the drive by formatting, ... br /> and run some simple RAM test.
    also there is ... that ROM test (forgot how to enter it ... do one of those RAM or ROM test in the +3?< ... worst, I have almost 0 free time here and there ...
    Ivanzx Ivanzx May 2012 Hardware
  • Issue 2 headache!Ive got an issue 2 here that firstly had a blown regulator (fixed), now its reading as a 16k machine (its fully populated), ive replaced and socketed…

    ... . Paul Farrows RAM test is still reporting bad address line 0 too, im ...
    Macc Macc August 2012 Hardware
  • 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", ... br /> ; Spectrum +2 (not +2A!) RAM test
    ; assemble & run at ... [*]"ROM fail: address 0000, page [0 or 1]" (ROM checksum error ...
    Battle Bunny Battle Bunny January 2013 Hardware
  • RAM Diagnostic ROMhi all, i burn this ROM from here [url]http://www.fruitcake.plus.com/Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm[/url] and i a…

    ... have an error on 0 data line or address ... i can identify the faulty RAM ic?[/QUOTE]


    The RAM test program gives a red border ... ") act as address line 0 for the RAM.

    ... trace), so check and test for open circuit and short ...
    1024MAK 1024MAK March 2013 Hardware
  • RAM Diagnostic ROMhi all, i burn this ROM from here [url]http://www.fruitcake.plus.com/Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm[/url] and i a…

    ... as the RAM chips are concerned, each RAM chip (of ... .

    The RAM test program gives a red border ... 5 on each) WHEN these RAM chips are fitted.
    ... ") act as address line 0 for the RAM.

    ... trace), so check and test for open circuit and short ...
    xaris_sm xaris_sm March 2013 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…

    ... I will do some test with the "RAM test ROM"...
    I ... now want remove the two ram chips... but with my ... replacement for the two dead ram...
    thanks to all ... +5V, plus or minus 0.25V, and you have 5 ... and then change the hot RAM chips, WITHOUT TRYING TO ...
    Falco-F8L Falco-F8L April 2013 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 ... seems not working this have 0,4 on out when connected ...
    emilen72 emilen72 May 2013 Hardware
  • Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…

    ... today. It has on bank 0 not the diagnostic rom code ... normally appears when the lower Ram is broken or the 12V ... recognized that there is no Ram test using this Rom. Is this ... which works and has upper ram and may be address logic ...
    maskenlos maskenlos October 2013 Hardware
  • Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…

    ... inserted is functional, switching between test mode and normal mode is ... still works OK (in the test mode) for about 15 minutes ... random tests in the ROM test program and it was still ... [/URL]
    Freezes after boot RAM test in PAPER 0 screen.
    Factor6 Factor6 April 2014 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…

    ... command.

    Running the RAM test program I found here I ... "23781": REM PAUSE \ or just 0 OK, 10:3
    Brian Brian July 2014 Hardware
  • +2 DIAGNOSTICSIs there a diagnostics test available for the spectrum 128 (+2) in tzx format? I've just obtained a spectrum +2 Grey and all looks fine with it on f…

    The +2 RAM test on startup checks ... />
    ; ---------------
    ; Fatal RAM Error
    ; ---------------
    ; Set the ... faulty:
    ; RAM bank 7 - Black.
    ; RAM bank 6 - ... ; RAM bank 2 - Magenta.
    ; RAM bank 1 - Red.
    ; RAM bank 0 - ...
    balford balford December 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…

    ... Exp
    32768 128 0
    32769 149 21< ... fault and not the upper RAM. Swapped the ULA over ... 2 and run the ram test program again with the ... few Upper RAM IC's, run the test program again ...
    retrogamemart retrogamemart December 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…

    ... store a test program in the battery backed RAM, but again ... ZXC4 with a ROM based RAM test. It's not cheap, ... can also be used to test RAM as well as be ... /zx-diagnostics
    That test program can run on any ... area of the BASIC ROM (0 to 16k) including the ...
    1024MAK 1024MAK December 2015 Hardware
<1234567…34>

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