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  • 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
  • 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 ...
    Trafferth Trafferth August 2014 Hardware
  • 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
  • RAM issue for potential 48k buy?Hi guys I've got a 48k in my sight for ?20 but... it has an issue: [QUOTE]"I tested the computer and only displayed a distorted screen. Coloured …

    ... />
    Would this be faulty RAM chips? I've seen similar ...
    dreamscape dreamscape August 2014 Hardware
  • 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
  • Short Circuit Damage?Hey Spectrum fans, Currently trying to diagnose what is wrong with my 48K Issue 4B ZX Spectrum. The initial problem was the fact it would not boot -…

    ... in the lower 16K of RAM. Well, that was the problem ...
    Tekno Venus Tekno Venus 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
  • 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
  • Turbo Kart Racer: MASI'm confident that MAS on a loading screen of Turbo Kart Racer means Michael Sanderson: * He worked with Players on other projects too * Style is res…

    I'm confident that MAS on a loading screen of Turbo Kart Racer means Michael Sanderson:
    * He worked with Players on other projects too
    * Style is resembling his other works
    * He used MAS signature on other works.
    moroz1999 moroz1999 September 2014 Infoseek database
  • 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
  • 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
  • Turbo loading with iOS Speccy Tape AppHas anyone had any luck using this? It works perfect at normal speed but as soon as I try to whack the speed up in the settings - Nothing. Doesn't e…

    ... any luck using this to turbo load, I'd like to ...
    whoremoan whoremoan 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…

    ... that some of the uppe ram ic's were faulty ... on to desoldered the upper ram ic's, socketed the ... board and replaced the ram with known good chips. ... replaced all the upper ram with known good ram from another Issue ... cant now be the upper ram as I swapped and ...
    retrogamemart retrogamemart December 2014 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
  • 128K RAM tester as .TAP?I was sure that I've seen a RAM tester that can be loaded with e.g. DivIDE or DivMMC EnJOY! as .TAP. But I can't find it (been searching through the …

    ... that I've seen a RAM tester that can be loaded ... 128K machines, and if lower RAM works fine, and there is ... a small error in upper RAM.

    I have a ...
    bverstee bverstee January 2015 Hardware
  • New version emulator ZEsarUX-2.0Hi I have uploaded a new version of my ZX80/81/Spectrum/Z88 emulator on [url]http://sourceforge.net/projects/zesarux/[/url] Changes are: Added Ca…

    ... formats). It handles loading of turbo load tapes or any type ...
    Added option to emulate RAM refresh
    Added option to ...
    chernandezba chernandezba January 2015 Emulators
  • 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 used ... that device is a 128K RAM test firmware.

    When ... [/url], page 4) means that RAM page 5 has an issue ... the PCB is for which RAM page?

    I?m ...
    CRNorris CRNorris February 2015 Hardware
  • Loads of Microdrive cartridges on Ebay plus Vortex RAMI?ll be selling three bundles of eight Microdrive cases with four, used cartridges each, means 32 cartridges per bundle, here?s one of them [img]http…

    ... an untested Vortex SP 512 RAM expansion with CPU and ULA ...
    schombi schombi February 2015 Sales
  • Trying to remember the name of a driving gameIt look graphically a little like Turbo Esprit, but was more directly top down. There were black and red cars, and when you crashed into one, they sh…

    ... look graphically a little like Turbo Esprit, but was more directly ... into one, they shattered like glass. You may or may not ...
    MattLamb MattLamb February 2015 Games
  • New version emulator ZEsarUX-2.1Hi I have uploaded a new version of my ZX80/81/Spectrum/Z88 emulator on http://sourceforge.net/projects/zesarux/ Changes are: Added Cocoa…

    ... file type detection (standard or turbo, etc) on quickload
    Changed ...
    -Special words "ram" or "rom" to match ram or rom mapped ...
    chernandezba chernandezba May 2015 Emulators
  • Which games would you remake? Or like to see a mockup of?We all have a list of titles that we know or felt was not good enough or simply rushed to market without thought or effort. So which titles would you…

    ... few mockup shots of SF2 Turbo for the Spec and that ... because of the lack of RAM and I can appreciate it ...
    Rebelstar Rebelstar June 2015 New game ideas
  • K-MOUSE TURBO 2011 interface - next batchI plan make some pieces of K-MOUSE TURBO 2011 interface. It's mouse interface for ZX and compatible computers. [img]http://velesoft.speccy.cz/othe…

    ... some pieces of K-MOUSE TURBO 2011 interface. It's mouse ...
    velesoft velesoft September 2015 Sales
  • Another silly hardware idea - RAM Pack adaptorHow about a mini bit of PCB that adapts ZX81 RAM Packs to replace the address space of the Spectrum's ROM? I guess practically you'd need a way to…

    ... of PCB that adapts ZX81 RAM Packs to replace the address ... well just design your own RAM board.

    Could have ...
    joefish joefish September 2015 Hardware
  • Datel Turbo Ace - Manual ?I have acquired a [url="http://www.worldofspectrum.org/infoseekid.cgi?id=1000100"]Datel Turbo Ace[/url] Joystick interface, but have no detailed info…

    ... /infoseekid.cgi?id=1000100"]Datel Turbo Ace[/url] Joystick interface, but ...
    RMartins RMartins October 2015 Hardware
  • Testing a RAM packI had my Spectrum + today which is working, but i also had a ZX Spectrum 32k RAM Pack and i wanted to test it. Is there anyway i can test this on the…

    I had my Spectrum + today which is working, but i also had a ZX Spectrum 32k RAM Pack and i wanted to test it. Is there anyway i can test this on the Spectrum + and if so how ?

    thanks
    morcar morcar October 2015 Hardware
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Latest Posts

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