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  • zx81: is there a 16kb ram limit for basic?first of all, sorry to all about posting a question about zx81 in a forum mostly about zx-spectrum - i didn't want to offtopic questions here anyway,…

    ... time were only predicting 16kb ram extension, and this may the ... 32kb, 48kb or 56kb of ram?
    nitrofurano nitrofurano April 2012 Sinclair Basic
  • TR4 is goneMy TR4 transistor is burned. Can I replace this transistor with a TIP31B or C ? My 4116 RAM ic?s are showing +0.05V, +5V and +8.49V... :) My Spectru…

    ... or C ?
    My 4116 RAM ic?s are showing +0 ... my Spectrum has the composite video mod. The LM works only ... colour even in the composite video?

    Could be the ...
    Turrican Turrican April 2012 Hardware
  • Experiments mixing ULA+ and Timex Hicolour featuresI'm trying to improve my Verilog skills, so I've written a description of a complete ZX Spectrum 128K (+2 grey ROMs), with AY-3-8912. I wanted to add…

    ... XC3S1000 FPGA. No double port RAM has been used to implement ... ://youtu.be/X7rZVUEpXzk]A small video[/url] that shows how a ...
    mcleod_ideafix mcleod_ideafix April 2012 Hardware
  • 128 toaster video artifactsHi Have 2 128k "toasters" ,but i need to connect them through composite,becasuse i live outside the uk, and rf is not an option on my tvs Made a ca…

    ... cable to pin 1 and video works ok,but on some ... games i get weird video artifacts/ random lines whick are ...
    danilop2k2 danilop2k2 April 2012 Hardware
  • Inefficient code in ROM, from ram-check to RAM-DONEHere is the inefficient code: [CODE] ;; ram-check L11DA: LD H,D ; Transfer the top value to the HL register LD L,E …

    ... ; pair.

    ;; RAM-FILL
    L11DC: LD (HL ... JR Z,L11EF ; forward to RAM-DONE if faulty.
    < ... />
    [CODE]
    ;; ram-check
    EX DE,HL ...

    ;; RAM-FILL
    L11DA: LD (HL ...
    antoniovillena antoniovillena April 2012 Development
  • 4116 Ram chip replacements?Hello. I am in the work of gathering replacement parts for my speccy 48k. And I would like to know what chips is good replacement for the 4116 ram ch…

    ... good replacement for the 4116 ram chips, and where can I ...
    Johan1973 Johan1973 April 2012 Hardware
  • The Spectrum Show (video)Just something I have been messing about with. Had a video project coming up at work and needed to get my video editing refreshed - so I made this li…

    ... about with.
    Had a video project coming up at work ... and needed to get my video editing refreshed - so I made ...
    Paul-J Paul-J April 2012 Announcements
  • Getting absolutely no video from a 128+I'm trying to get a friend's toastrack 128 to show video and I'm not having any luck. I'm in the US, so I don't have access to any TVs that can take …

    ... 's toastrack 128 to show video and I'm not having ... />
    I've tried composite video and RGB on all of ...
    papa_november papa_november April 2012 Hardware
  • Speccy 128 VideoI have had this problem for so long need to share now, to see if any of you can help i don't live in the uk, tvs here don't have scart i output vi…

    ... scart

    i output video from my 2 128 speccys ...
    danilop2k2 danilop2k2 May 2012 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 ... my amplifier which had a fault. It distorted the signal in ...
    ArtemKuchin ArtemKuchin May 2012 Hardware
  • Another Roger Jowett oneHello guys, I want print here the conversation with Roger Jowett. He is spamming all e-mails he can get hold of. Especially for the Spectrum30 show…

    ... then what the **** its a video for a
    sam coupe ... dont worry its never your fault is it
    its always ...
    Speccyman Speccyman May 2012 Sinclair Miscellaneous
  • Faulty Grey Spectrum +2 - help neededI have a faulty spectrum +2. I tested the voltaged inside - all check fine. Well, within some limit, +5 for example is 4.83, but all other voltages a…

    ... same?

    Here the video:
    [url]http://www.youtube ... -S3Mc[/url]

    So, video out is okay, CPU is ... . What's left? ULA and RAM.
    Cannot test ULA and ... how to search for back ram chip in such situation.
    ArtemKuchin ArtemKuchin May 2012 Hardware
  • Joystick Interface IssuesHi all, I use the WOS resources quite frequently but have very limited posts regarding the forum, however I have an issue and hoped some of you may …

    ... /> I have:
    2 x RAM Kempston compatible interfaces
    1 ... keyboard is fully responsive. The video is clear.

    I ...
    Melted Melted June 2012 Hardware
  • Odd versions of the Multiface One.I've been looking through the adverts for the Multiface One and it's clear that there were a number of versions available. Note the earliest advert …

    ... has a compsite video output and 2K of RAM!

    It ... of the interface? The 2K RAM and Kempston Disc versions must ...
    Jmk Jmk June 2012 Hardware
  • Replacing Upper RAM in 48KHi Folks Well, my fun continues :) After sorting the display issues with this machine I found I couldn't load software meant for 48K machines. Havin…

    ... looks like an upper memory fault.

    Before I start ...
    spookt spookt July 2012 Hardware
  • Issue 1 ram connectors....Hi Does anyone have the pinout of the Issue 1 internal RAM connectors, for the 16K-> 48K upgrade board, as I'd like to try and make myself a board, a…

    ... of the Issue 1 internal RAM connectors, for the 16K-> ...
    prime prime July 2012 Hardware
  • 48K and wavy lines.It seems all Spectrum related things are breaking here at casa de Don Pedro. After the problem with my old ZX81, I went over to my issue 2 ZX Spectru…

    ... . This one is also showing video nasties. Both were on the ... the "wavy lines across screen" fault I read about.

    pmsr pmsr July 2012 Hardware
  • More RAM for BASIC (ZXSE required)Ok, here it is: [url]https://dl.dropbox.com/u/15659782/48KBASICSE.zip[/url] Use it as an IF2 ROM with a ZX Spectrum SE. It's a version of the 80x2…

    ... similar mod for the standard video mode that would work on ...
    chev chev July 2012 Sinclair Basic
  • The video circuitryDo you know which electronic parts make up the video circuitry in Spectrum 128k +2?

    Do you know which electronic parts make up the video circuitry in Spectrum 128k +2?
    George George July 2012 Hardware
  • Interesting Keyboard FaultWhy-oh-why do I keep buying half-dead Speccys off fleabay. Bought this one as a source of spares, it was listed as having a non-working keyboard due…

    ... due to a possible ULA fault, I had a correct (but ...
    napoleonblownaparte napoleonblownaparte August 2012 Hardware
  • ULA bug and snowI am tryng to improve the snow emulation in FBZX wii but I do not have a real spectrum to test the results. I used the information taken from Harele…

    ... is writing in the ULA video register the second screen byte ... not get latched into the RAM but the previous latched row ...
    Oibaf Oibaf August 2012 Emulators
  • Faulty 128K toastrack keeps resettingHi. I have this toastrack which worked nicely for let's say 40 minutes and then a weird fault showed up. It keeps resetting over and over, sometimes…

    ... minutes and then a weird fault showed up.

    It ... advice? I can post a video somewhere showing the problem if ...
    pkersey pkersey August 2012 Hardware
  • RAM Turbo without a slot?Hi! I got this RAM Turbo joystick interface which surprisingly came without a cartridge slot inside. Would there be any reason someone should cripple…

    Hi! I got this RAM Turbo joystick interface which surprisingly ...
    pkersey pkersey August 2012 Hardware
  • copying between RAM pagesSay I'm storing stuff in RAM pages 0,1,3,4 which gets used in 6,7 (which I am) and I might want to transfer up to 7kb at a time (which I do) and I do…

    ... I'm storing stuff in RAM pages 0,1,3,4 ...
    Battle Bunny Battle Bunny August 2012 Development
  • Issue 3 board - Free to good homeI have an issue 3 board that someone could scavenge for spares or even repair if they're willing to pay the p&p. I got it off someone on Amibay in a…

    ... fault, failing to mention that at some stage most likely a RAM ... NEC z80 and socketed upper ram. I'd rather turn this ...
    napoleonblownaparte napoleonblownaparte August 2012 Sales
  • ZX 48 issue 4S no s-video possible?No s-video on ZX 48 issue 4S possible? I have had this mod on my issue 4A. But this did not work with my 4S. On C65 is no chrominance signal. Here …

    No s-video on ZX 48 issue 4S ... to pin 4 on s-video socket.
    The Luminance (B ... /W video) signal is taken from input ... to pin 3 on s-video socket.
    Pin 1 & ... ; 2 on s-video socket is soldered to ground ...
    -Micky -Micky August 2012 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... for a reason: the component video signals originally generated by the ... as output (and incidentally, S-Video)

    So, at ... piece of wire to get video output. For ULAPlus compatibility, a ... clocks, and enough fast block RAM to implement an extra memory ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • A new ZX spectrum cloneOver the past 12 months i have been developing a new spectrum clone as a hobby project to waste my spare time on. It is still not fully complete yet …

    ... cycle accurate)
    512K RAM plus 64K video RAM
    Stereo AY sound ... for BASIC extensions
    4 video modes (spectrum, spectrum with 2x4 ... /> ULAPlus mode available in all video modes
    SD card FAT32 ...
    mspec mspec August 2012 Hardware
  • kNIGHTMARE VIDEOHello. Here is a video of stage7 of the game. [youtube]6YAb6QEFf-E[/youtube] Regards

    Hello.

    Here is a video of stage7 of the game.


    [youtube]6YAb6QEFf-E[/youtube]


    Regards
    climacus climacus September 2012 Development
  • +2 (Grey) S-video?I have a pretty good Composite/S-video to VGA adapter that does a nice work of running my retro machines on an old LCD screen. However, it looks best…

    ... a pretty good Composite/S-video to VGA adapter that does ... feed it with a S-video signal instead of a Composite ...
    Johan1973 Johan1973 September 2012 Hardware
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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
    harriusherbartio on April 21
  • +3 Disk drive motor
    AndyC on April 21

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ram 12.6K 21.4K
fault 4.2K 4.8K
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