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  • Toastrack/Grey +2 physical memory layoutI'm looking to extend the functionality of the test ROM used with Winston's diagnostic board to also properly test the RAM of toastrack and grey 128K…

    ... to also properly test the RAM of toastrack and grey 128K ... write to screen the specific IC's that are suspect (once ... />
    [B]+2:
    [/B]RAM is in positions IC17-IC32 ... direction are bits mapped to IC's (e.g. bank 0 ...
    balford balford February 2014 Hardware
  • Buying ram for W7It's been a long time since I bought any ram for a PC (I think I bought a few DIMMs when they first appeared) so I thought I'd ask here to make sure …

    ... time since I bought any ram for a PC (I think ... /components/memory-pc/ddr2pc2-6400800mhz/ram-804gk.html"]these DDR2 DIMMs ...
    VincentAC VincentAC February 2014 Chit chat
  • 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 ... that stores the v$ dim RAM position.


    When ... readed from RAMPEEK v$ dir RAM...
    [INDENT]POKE dir,byte ...
    Hark0 Hark0 March 2014 Sinclair Basic
  • Referbished and modded ZX81When I had this ZX81 it wasn?t working very well. It would refuse to tune into my old CRT TV so I decided to get it up and running on modern TV's. I…

    ... the keyboard plus into were faulty. So I fitted new connections ... pictures comes with a 16k ram pack so you can get ...
    morcar morcar March 2014 Sales
  • ZX81 internal RAM upgrade?It's only a matter of time before I kill my ZX81 due to this slack ram pack :( Is there a tutorial available that will allow me to upgrade my RAM to…

    It's only a matter of time before I kill my ZX81 due to this slack ram pack :(

    Is there a tutorial available that will allow me to upgrade my RAM to 32k or maybe even more?
    stu232 stu232 March 2014 Hardware
  • HDMI generation by cloning video ram(coming from [url]http://www.worldofspectrum.org/forums/showthread.php?p=768257&posted=1#post768257[/url]). A thing I was brainstorming about.. Why …

    ... /microcontroller respond to any video ram change in the ZX Spectrum ... /> No analog circuits, no video ram reading and contention problems.
    ram, with HDMI output...

    bverstee bverstee May 2014 Hardware
  • Simple Question! RAM InterfaceI was messing around on my spectrum yesterday and blew it up! Im sure it has to do with the RAM joystick interface I bought but hadn't tested. Is the…

    ... has to do with the RAM joystick interface I bought but ...
    Taylod1974 Taylod1974 June 2014 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…

    ... But since this is in RAM we can later redirect ... best "safest" address in RAM for such a table?< ... (incl. Speccy) do a RAM test
    at startup. ... table before
    the RAM test / it will get overwriten ... Bummer. What if we replace RAM checking
    code with ...
    tstih tstih July 2014 Development
  • Bypassing bits of faulty ULAs: the LOAD!Hi everybody, Recently I had a sick Spectrum sent to me. The symptoms were that the machine would run fine, except that it wouldn't load. The border…

    ... loaded Automania (with a 32KB RAM pack, of course), so even ...
    Spirantho Spirantho July 2014 Hardware
  • Faulty(?) ZX81 plus ZX8-CCB boardHello, I have an apparently faulty ZX81 with a ZX8-CCB video out board for sale. It was working last time I had it put together, around this time las…

    Hello, I have an apparently faulty ZX81 with a ZX8-CCB ...
    pmsr pmsr July 2014 Sales
  • ZX81 + 16k RAM Pack + Original PSU... What's it worth?Hey guys Got my ZX81 this morning its in excellent condition.. [IMG]http://s30.postimg.org/iwetzxku9/IMG_20140818_142443.jpg[/IMG] However, my T…

    ... with original PSU & 16k RAM pack actually worth here? If ...
    dreamscape dreamscape August 2014 Sinclair Miscellaneous
  • For Sale?? Offers? Spectrum ZX81, PSU & 16k RAMHi all I've got a ZX81, 16k RAM pack & original PSU here I purchased sadly it won't work with my TV and I don't want to hack it apart to make compos…

    ... 've got a ZX81, 16k RAM pack & original PSU here ...
    dreamscape dreamscape August 2014 Sales
  • Wanted: ZX81 boxed with 16k RAM PackI'm looking for a clean, working and good condition ZX81 with original Sinclair 16K RAM Pack. Would prefer if it was in a box. Oh and if you have 3D …

    I'm looking for a clean, working and good condition ZX81 with original Sinclair 16K RAM Pack. Would prefer if it was in a box. Oh and if you have 3D Monster Maze that would be the icing on the cake, thanks.
    sj_howlett sj_howlett August 2014 Wanted
  • Is my ZX81 RAM Pack OK?Hi guys I've just taken my 16k RAM pack apart to give it a clean inside and out and i noticed these strange burn type marks!? [IMG]http://s7.postim…

    ... 've just taken my 16k RAM pack apart to give it ... this burn marks!? Is my RAM pack damaged I haven't ...
    dreamscape dreamscape August 2014 Hardware
  • 1st interface in 30 years (update)Hi all, Just a wee update to my "1st ZX interface in 30 years" project. Main IC's: 82C55 three 8-bit port I/O (configured for 12 dig in, 12 dig out…

    ... years" project.

    Main IC's:
    82C55 three 8 ... the status registers from the IC to verify it was working ... ZX interface is different, or faulty mem in the toastrack......who ...
    IanJ IanJ August 2014 Hardware
  • 48K Ram Check Command not workingI am trying to repair my Spectrum 48k. It is having issues loading games, sometimes they load all the way to launch and then the speccy resets. Oth…

    ... points me towards checking the RAM.

    I have entered ...
    wep855 wep855 August 2014 Hardware
  • Interfaces & ROMsHi everyone, I'm currently looking into the various modern interfaces for the Spectrum to allow me to run all my games from an SD card. I have a few…

    ... a Spectrum with a 16K RAM fault, I could boot from ... the RAM from it. I'd then know which chip was faulty ... TEST PROGRAMS
    [*]SPECTRUM 128 RAM TESTER
    [*]SPECTRUM ROM TESTER ... [/url]

    The 128 RAM Tester and ROM Tester won ...
    Tekno Venus Tekno Venus August 2014 Hardware
  • Spectrum stuff for sale (ZX81, RAM pack, Tapes... etc)Selling the following: [IMG]http://s26.postimg.org/uk0ntdsq1/IMG_20140902_205737.jpg[/IMG] [IMG]http://s26.postimg.org/ronkmioq1/IMG_20140902_20575…

    ... original too)
    ZX81 16k RAM pack - Working
    Spectrum tapes ...
    dreamscape dreamscape September 2014 Sales
  • Early ZX80/81 RAM Pack???Hey all I got given this RAM pack... It doesn't work (i know why now) but compared to my RAM pack this one is really strange... Is this a ZX80 RAM p…

    ... />
    I got given this RAM pack... It doesn't work ... now) but compared to my RAM pack this one is really ... strange... Is this a ZX80 RAM pack or something as it ...
    dreamscape dreamscape September 2014 Hardware
  • 48k - Why Won't it Buzzzz?Hi WOS ;) I bought a load of Spectrum games off eBay and thrown in for good measure was a 48k 1984 Issue 6a circuit board that I was told was for sp…

    ... /> The voltages around the lower RAM ICs are all wrong however ... appears I know the lower RAM is faulty (alternating black & white ... all work fine. The upper RAM has been removed and donated ...
    retrogamemart retrogamemart September 2014 Hardware
  • ZX81 internal RAM board?Just a quick question to Zorn (amongst others). What would the issues be with fitting one of Zorn's RAM boards into an unexpanded ZX81? Seems to me…

    ... fitting one of Zorn's RAM boards into an unexpanded ZX81 ... a lot of the official RAM pack's internal circuitry is ... one - preferably the 32K upper RAM board, 'cos I never had ...
    DEATH DEATH October 2014 Hardware
  • The complete Manic Miner RAM disassemblyHot on the heels of the [url="http://skoolkit.ca/disassemblies/jet_set_willy/"]Jet Set Willy disassembly[/url], here is [url="http://skoolkit.ca/disa…

    ... /manic_miner/"]The complete Manic Miner RAM disassembly[/url] (Bug-Byte version ...
    SkoolKid SkoolKid October 2014 Announcements
  • JHCon 2014Hello, not sure if this is the right category but JHCon 2014 will take place[B] from 28. to 30.11.[/B] at usual place - gymnasium in Jindrichuv Hrad…

    ... /> [URL="http://jhcon.ic.cz"]http://jhcon.ic.cz[/URL]

    RAM, POKE, PEEK) is forbidden! USRs ...
    Factor6 Factor6 October 2014 Announcements
  • Interface 1bis RAM Drive modificationAll Interface 1bis users I hope I am not interfering with Dan, but I saw on his site that he has a RAM Drive upgrade/modification for the Interface …

    ... site that he has a RAM Drive upgrade/modification for the ... have an on-board 128K RAM drive, the user must install ...
    Pierre Pierre October 2014 Hardware
  • Sinclair PC 200 Error: Faulty SYSTEM serial portHi guys, this is my first post but not a happy one. I have bought 2 weeks ago an Sinclair PC200, when powerd up it shows the following message: "[B]E…

    ... the following message: "[B]Error: Faulty SYSTEM serial port[/B]". Any ... this? Could be an mc1489a faulty chip? I would love to ...
    jcarvalho jcarvalho October 2014 Hardware
  • Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …

    ... I noticed that the RAM? (smallest socketed) IC on the Opus was ... .4S motherboard with Zorns lower RAM module and a composite mod ...
    rune rune November 2014 Hardware
  • I broke my 48k Speccy!!!!Hey guys, I am looking for some advice, I hope you can point me in the right direction. So, I went about replacing all the capacitors on my issue 4…

    ... /> The voltages on the lower ram are well out of whack ... , maybe one of them was faulty - they are all new.
    ram now due to the weird ...
    RSwipeCA RSwipeCA December 2014 Hardware
  • Ram Turbo Interface with Kempston and Sinclair/Amstrad joysticksHi! Do you know how to plug and use two different joysticks with the Ram Turbo interface? [url]http://www.worldofspectrum.org/infoseekid.cgi?id=1000…

    ... two different joysticks with the Ram Turbo interface?

    [url ...
    DaRkHoRaCe DaRkHoRaCe January 2015 Hardware
  • 80K RAM UpgradeAn 80K RAM upgrade has been listed on sellmyretro.com (not by me). It is based on the one originally designed by Sandy Electronics and has their p…

    An 80K RAM upgrade has been listed on ... /details/NEW-SCT-MODULE-EXPANSION-RAM-80K-FOR--ZX-SPECTRUM-4119 ...
    rwap rwap January 2015 Sales
  • Issue 1 16K RAM bankFolks, I recently had a chance to fix a couple of Issue 1 boards, and learned the hard way that the chips in the 16K RAM bank have a different place…

    ... the chips in the 16K RAM bank have a different placement ... from 2 up have the ram chips lined up the most ... meaningless reports from the Fruitcake RAM tester, I finally checked all ...
    Falco-F8L Falco-F8L January 2015 Hardware
<1…14151617181920…34>

Latest Posts

  • European Software Titles with an English version
    harriusherbartio on 12:06PM
  • How Do You Categorize Your Speccy Software and Games?
    harriusherbartio on 11:21AM
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
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HitBox

Word Docs Hits
faulty 2.3K 2.8K
ram 12.6K 21.4K
ic 1.5K 2.2K

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  • Diagnosing Spectrum 48k (faulty RAM chip?)I have a Spectrum 48k (I believe it may be an upgraded 16k model) that doesn't work, and never has ever since the owner gave it to me. When you turn …
  • Inefficient code in ROM, from ram-check to RAM-DONEHere is the inefficient code:<br /> <br /> [CODE]<br /> ;; ram-check<br /> L11DA: LD H,D ; Transfer the top value to the HL registe…
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  • How do I know the RAM size?Just left my parents after cleaning out my pile of old stuff in their basement.<br /> Know what I found? My old ZX Spectrum.... Those were the days!<…
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