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Search Again :: Adv Search 1000 results in 0.033s
<1234567…34>
  • The Complete List Of The Causes Of Lower Ram Failure?Well the aim is to get a comprehensive list.I ask this because I know very little about it . I know that failure of "power supply" related capacitors…

    Well the aim is to get a comprehensive list.I ask this because I know very little about it . I know that failure of "power supply" related capacitors can do this . But I suspect there are loads of other ways to damage lower RAM ICs? Any ideas?
    harriusherbartio harriusherbartio March 2020 Hardware
  • ZX Spectrum 48k Issue 2 Faulty Ram?Hi, I have a faulty ZX Spectrum Issue 2 motherboard. Looks in very tidy condition. Though I'm getting random columns of blocks and flashing cursors…

    ... read would indicate a lower ram failure. I have lightly touched the ... seem cool.

    The ram fitted is 8322 4116 2N ...
    serene serene June 2013 Hardware
  • From RAM to dim v$() "video buffer" SPEED UP!Hi! This question is related to "quick RAM copy using LET in Basic" ([url]http://www.worldofspectrum.org/forums/showthread.php?t=44296[/url]). Wel…

    ... question is related to "quick RAM copy using LET in Basic ... buffer".
    - A zone of RAM with 160 bytes corresponding to ... the v$ dim RAM position.


    When I start a ... readed from RAMPEEK v$ dir RAM...
    [INDENT]POKE dir,byte ...
    Hark0 Hark0 March 2014 Sinclair Basic
  • OT: Graphic Card problemAhem. It's me again with a computer problem! Last time I posted with a problem I was pleasantly suprised with some insightful answers that helped fix…

    ... . The display screen is corrupted when I enable full hardware acceleration ... Banshee. Everything worked OK but when I tried to run Quake ... card and said that the RAM was surely broken, these lines ... typical symptoms of a video RAM failure; so they gave me a ...
    cascarria cascarria November 2005 Chit chat
  • What's the most probable......cause for this on a grey +2? (z80 is excluded) [url]http://img376.imageshack.us/img376/8087/plus2hk9.jpg[/url]

    ... soldered one socket on the ram bank of the 128K and ... started testing each of the ram ic's of the +2 ... would explain getting no errors when cold booting but increasing with time ...
    odious odious March 2007 Hardware
  • R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…

    ... the dust the other day when I tried to power it ... on.
    When powering it on, it gave ... / Ohms...would this cause the failure? It did work flawlessly until ... suggest it's a lower RAM failure, but it could be the ...
    DEATH DEATH February 2009 Hardware
  • 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…

    ... Test.
    Failure here may indicate that the RAM refresh is not ... RAM, and corruptions are reported. It could also indicate a timing failure when ... full of text.
    Failure will be when the text is misprinted ...
    murtceps murtceps October 2009 Sales
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... />
    Removing the lower RAM was time consuming and fiddly ... a lower RAM failure (it only sometimes fully initialises and when it does ... the upper RAM putting stuff on the data bus when it shouldn ... white when I turn on the Spectrum with the lower RAM removed ...
    Zorn Zorn November 2011 Hardware
  • Faulty 48K Issue 3 motherboardHi I have a faulty Issue 3 motherboard and would appreciate it if somebody can steer me in the right direction of where to begin with the fault find…

    ... /> how did you check the RAM ic's ULA, CPU and ... with the Spectrum switched off. When I switch the Spectrum on ... , etc. as with a lower RAM failure.

    I tested the ... RAM IC's, ULA, CPU and ...
    Pierre Pierre April 2013 Hardware
  • SE BasicAfter 13 years of development I thought I'd run out of things to optimize, but it turns out I was wrong. However, I'm now running out of time to work…

    ... wasn't about on WoSf when SE Basic IV Anya v4 ... :
    [list]
    [*]128 RAM cleared on cold restart.
    [*]3 new ...
    chev chev October 2013 Sinclair Basic
  • 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…

    ... times) to indicate the lower ram failure
    - After that all LEDs ... me this means that all RAM chips are faulty which is ... page mentions that this happens when the address logic (IC 3 ... and all upper Ram chips

    128K Ram test ROM
    maskenlos maskenlos November 2013 Hardware
  • Spectrum Not Responding to Keyboard InputHello, sorry if this thread is not in the correct place, This is my first post and I'm not sure where to post this type of thread. :lol: Anyway, I r…

    ... with your Speccy.

    When the machine powers up, do ... would indicate a possible lower RAM failure (8 chips at the bottom ... or high.

    Also, when it does boot to the ... seen behaviour like the above when upper RAM is not behaving itself ...
    balford balford March 2014 Hardware
  • Spectrum Not Responding to Keyboard InputHello, sorry if this thread is not in the correct place, This is my first post and I'm not sure where to post this type of thread. :lol: Anyway, I r…

    ... down to a RAM failure of some sort.

    When you get ... way you can isolate upper RAM from the system to narrow ...
    balford balford March 2014 Hardware
  • Spectrum Not Responding to Keyboard InputHello, sorry if this thread is not in the correct place, This is my first post and I'm not sure where to post this type of thread. :lol: Anyway, I r…

    ... down to a RAM failure of some sort.

    When you get ... way you can isolate upper RAM from the system to narrow ... of this, except the "upper" RAM chips are disabled, not isolated ... being pedantic? Well, sometimes a RAM chip goes faulty in such ...
    1024MAK 1024MAK March 2014 Hardware
  • Spectrum 128 malfunctioning with DIVMMCI recently got myself a spectrum 128 (toastrack) and a DIVMMC card so I could load games from it. It all works fine until it has warmed up and then t…

    ... will conduct more current when hot compared to when cold. The voltage drop ... across a diode reduces slightly when it ... such as the Z80, the RAM, the ROM and the 74LSxxx ... so produces more heat than when it is just powering only ...
    1024MAK 1024MAK June 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…

    ... simpler high or low RAM type selector, not ... was supplied with a RAM upgrade kit, however. ... address connections for OKI RAM when the appropriate link could ... remove the socketed upper RAM chips and power ... can rule out upper RAM failure if the Spectrum initializes ...
    memrah memrah December 2015 Hardware
  • ZX Spectrum +3 repairI have my first +3 here, and it needs repairs. Hoping someone here can help me out. When I power it on I get this screen with black and white line…

    ... chips (including the ROM and RAM) in the system
    [/list ... , control or data bus failure, ROM failure or RAM failure will most likely result ... garbage it receives.
    Even when the CPU is in a ...
    1024MAK 1024MAK October 2017 Hardware
  • 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 …

    ... I started , as the lower RAM failure shown with the IC21 chip ... speak with just the upper Ram problem.

    This ... at IC21 . When it was retested it shower upper ram failure at IC15 ... . So something had caused lower RAM failure this time What a useful ...
    harriusherbartio harriusherbartio March 2020 Hardware
  • BASin Release 13 is now availableI'm still at it. BASin is now in it's 13th incarnation (disregarding the inter-version updates) and is now available at [url="http://homepage.ntlw…

    ... +2 manual that made the RAM Disk possible!)
    Added ... .
    Added - 128k RAM page bank switching mechanisms for ... 128k Errors were corrupting the RAM Disk when they triggered - SP was ... RAM Disk errors.
    Fixed - Some errors didn't display properly when ...
    Dunny Dunny January 2006 Emulators
  • BASin Release 13 is now available[unashamedly x-posted from Emulators forum] I'm still at it. BASin is now in it's 13th incarnation (disregarding the inter-version updates) and is …

    ... +2 manual that made the RAM Disk possible!)
    Added ... .
    Added - 128k RAM page bank switching mechanisms for ... 128k Errors were corrupting the RAM Disk when they triggered - SP was ... RAM Disk errors.
    Fixed - Some errors didn't display properly when ...
    Dunny Dunny January 2006 Sinclair Basic
  • Urgent!!!! Need help with saveHi guys, This is URGANT! I am making a turning moment program that uses many arrays. Each array is of size 500 and there are about 6 of them. The c…

    ... a 16k with 32k ram pack.

    When try to save ... has happend before, last night when i made a proto-type ...
    Robin Robin March 2010 Hardware
  • Childhood moments with my SpeccyHey everyone. The other day I randomly came across a tumblr page called "Me and My ZX Spectrum" ([url]http://meandmyzxspectrum.tumblr.com[/url]) …

    ... collection of photos of people (when they were kids) with their ... were at their place, playing, when they mentioned that their mom ... we were assembling a battering ram when even the instructions on the ... ACG key as a battering ram, although, when I look at it ...
    memrah memrah July 2013 Sinclair Miscellaneous
  • Black screen on 48k+Hello peeps Just bought a 48k+ was working fine then after leaving it off over night I turned back on to get a total black screen, no border etc. …

    ... seems to be an upper ram failure. ICs 15-22 apparently each ... easier way of finding which ram chip is responsible? Also. How ...
    jamiejoe jamiejoe May 2016 Hardware
  • What are the chances?Hi all, I've picked up an issue 3B, fairly clean board, no mods, wasn't starting correctly so I tried Brendan's diagnostic ROM and got this: [i…

    ... [/img]

    Total lower RAM failure? Before I start pulling all ... the RAM out, is it possible that ...
    Jet5y Jet5y June 2016 Hardware
  • 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…

    ... fine.
    Lower RAM OK.
    When tested with the new ... IC22 are reported.
    When I swap IC19 and IC22 ... more important for the lower RAM, are the voltages:
    when I remove IC22, both ... doesn't change things when I swap IC19 and ...
    georgedb georgedb September 2016 Hardware
  • bizarre error on a grey ZX Spectrum+2 - the long search for a small problemHi, I got a ZX Spectrum+2 that worked a bit but crashed while loading or running 128k games. I installed a 128k-test-ROM that told me about RAM fa…

    ... -ROM that told me about RAM failure at page 3. I desoldered ... 8 RAM chips that included page 3 as the failure seems ... to be located in several RAM cells not ... I removed the second 8 RAM chips - to save time I ...
    ingo ingo November 2016 Hardware
  • Possible bug in SpectaculatorI was recording a walkthrough of the text adventure Planet of Death in Spectaculator (version 6.20.0540). When I started a recording I entitled the R…

    ... not allowed in filenames (only when specifiying a driver letter) and ... have thought XP would return failure when trying to create such a ...
    Jon Needle Jon Needle April 2005 Emulators
  • ZXCF InterfaceI'm just trying to get an idea for the ZXCF interface, and to me, it looks a much cleaner design compared to divIDE (Of course, that's just my opinio…

    ... to only page its own RAM in when certain points are reached ...
    MikeW MikeW April 2006 Hardware
  • Speccy MTBFHi, Looking at the old (issue 1-2) PCBs, they do look like someone knocked them up in an etching bath/with a soldering iron in their shed but has th…

    ... because of triple power. With RAM failure usually voltage converter transistor died ... frequent. Then: CPU, ULA, 32KB RAM chips, modulator, power supply...
    piters piters May 2006 Hardware
  • ResiDOS v1.92 and +3e ROMs v1.30 releasedI've just updated ResiDOS to v1.92, and the +3e ROMs to v1.30. Full details can be found at: [URL="http://www.worldofspectrum.org/zxplus3e/"]http://…

    ... point of having 512K RAM is when you've got ... somewhere, so you need RAM of some description (just ... since you need some RAM for workspace). Other 16K ... BASIC, anybody? ;) )

    RAM is pretty useful to have ... multiple tasks, then the RAM comes in very handy ...
    glancaster glancaster January 2007 Hardware
<1234567…34>

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HitBox

Word Docs Hits
ram 12.6K 21.4K
failure 1.5K 1.7K
when 123.3K 161.1K
cold 3K 3.4K

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