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<1…14151617181920…34>
  • zx spectrum without TR6 (ZTX313)Hi is it possible that a zx spectrum 48 issue 2 works without TR6 (ZTX313)? Should be very interesting.

    ... take a few of my Issue 2 boards out over the weekend ... ]This improved ULA (5C112) has no spider modification, but has either ...
    landex landex October 2013 Hardware
  • zx spectrum without TR6 (ZTX313)Hi is it possible that a zx spectrum 48 issue 2 works without TR6 (ZTX313)? Should be very interesting.

    ... to the 6C001E on the Issue 2 boards, namely R 47, R ... /> It also shifts the screen picture with one character width to ... left. If you put two Issue 2 boards, one with a 5C112 ... , then you will see the picture of the 6C001E is more ...
    Pierre Pierre October 2013 Hardware
  • +2a double vision - uncommon problemHelloo - I was helped by Guesser on a previous occasion on a toastrack, so many thanks to him for that! Today's problem is the RGB display from a +2a…

    ... tried different scarts - no probs with toastrack or spec issue 2 48k - just ... the toastrack and the grey +2 are slightly different in their ... going to work on a +2. The internal resistors are ... different and also the +2 incorporates the BRIGHT signal on ...
    skagon skagon November 2013 Hardware
  • Timex 2068 hi-color / hi-res modes.Hello. I know this is not a Timex forum but since it is a very close relative of the Speccy I thought I'd ask my question here. Does anyone know …

    ... backwards compatibility?[/QUOTE]

    No. It's 100% backwards compatible ... and works fine in an issue 2 Speccy. Sinclair were using the ...
    chev chev November 2013 Sinclair Miscellaneous
  • Timex 2068 hi-color / hi-res modes.Hello. I know this is not a Timex forum but since it is a very close relative of the Speccy I thought I'd ask my question here. Does anyone know …

    [QUOTE=aowen;733826]No. It's 100% backwards compatible. ... and works fine in an issue 2 Speccy. Sinclair were using the ...
    Paddy Coleman Paddy Coleman November 2013 Sinclair Miscellaneous
  • Some problems with 2 ZX Specturm board'sHi, last week i got some ZX Spectrum stuff. Also 2 ZX Spectrum 48K's, one in the orginal case the anoter one in a DK'tronixs case. Both have problem'…

    ... i got some better picture on my issue 2 board.
    Now the ...
    Reinier Reinier November 2013 Hardware
  • Some problems with 2 ZX Specturm board'sHi, last week i got some ZX Spectrum stuff. Also 2 ZX Spectrum 48K's, one in the orginal case the anoter one in a DK'tronixs case. Both have problem'…

    ... /> About the issue 2 board, after tweaking i got some beter picture.
    Reinier Reinier November 2013 Hardware
  • "Press any key" detectionWhat would be the simplest way to detect if *any* key is being pressed? No LAST_K trickery, I can't rely on that. It has to be reading the keyboard p…

    [QUOTE=Dr BEEP;735021]In BASIC it is reading IN 254 and test on value 191 or 255. Both false then key pressed.[/quote]

    The Timexen return 95 on IN 254 when no key is pressed. Not sure what issue 2 machines do.
    chev chev November 2013 Development
  • Two more faulty onesCould I get your opinion on these two faults, please? Understanding these two cases would be very beneficial for my ZX education. Thanks! - A Spectr…

    ... had been applied to the issue 2 5C112E ULA and altered the ... effect of shifting the television picture slightly further to the left ... /> [/RIGHT]
    [/QUOTE]So any issue 3 machine and up will ... exhibit this shift compared with issue 1/2 Spectrums.

    ...
    balford balford November 2013 Hardware
  • "Press any key" detectionWhat would be the simplest way to detect if *any* key is being pressed? No LAST_K trickery, I can't rely on that. It has to be reading the keyboard p…

    [QUOTE=aowen;735032]The Timexen return 95 on IN 254 when no key is pressed. Not sure what issue 2 machines do.[/QUOTE]

    I'm getting 31 on my TS2068s.

    The issue 2 returns 255, the issue 3 returns 191.
    rga24 rga24 November 2013 Development
  • Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…

    ... a circular copper pad, with no solder mask on them - I ... .

    Part number Z70830 Issue 2 board.
    DEATH DEATH December 2013 Hardware
  • "Weird" Spectrum +3Hi folks. I've just dicovered that one of my +3's has an Issue 1 board, with all the mods that are mentioned on guesser's website - the other has (w…

    [QUOTE=guesser;742814]This is on the Issue 2 board?[/QUOTE]

    No, it's the Issue 1 board that has the 'U' ROMs, the Issue 2 has the regular, "sans U" ROMs
    The_Bert The_Bert December 2013 Sinclair Miscellaneous
  • New CPU and Spectranet oddity.I have no reason to suspect this problem is due to a fault/poor design of the Spectranet, but understanding what it does at system initialisation may…

    ... /> My Spectranet interface is an ISSUE 2 SUN R405, S/N(?): QT100441 ... CPU socket. It is an ISSUE 6A board (ULA 6C001E-7 ... Zilog Z80A processor I had no problems. With the Z80 CMOS ... I have seen with the ISSUE 3B board. I got purple ...
    jimre jimre January 2014 Hardware
  • Born again Speccy user with problemsHello all, Firstly I'd like to say a big hello - this is my first post! When I was 8 or 9 or so my dad bought a ZX Spectrum 48K and a whole bunch o…

    ... I found it needs about 2.8 V peak-to- ... ...

    [QUOTE=DEATH]Issue 4B board in an '83 ... - I'd expect an issue 2 or an early issue 3 board [/QUOTE ... datecoded '84 so there is no way this could have been ... easy to replace (I wasted no time in ordering a new ...
    namtip namtip January 2014 Hardware
  • Weird tv output by spectrum 48kI recently got a spectrum 48k and hooked it up to my tv. After finding channel 36, I get a really weird picture for the spectrum, why is that? Below…

    ... /> Change the membrane if preferred (no cost if you provide the ... on the colour circuit on Issue 2 machines if necessary (the old ... /> .Check colour quality (usually only Issue 2 machines, but I have stocks ...
    Spirantho Spirantho February 2014 Hardware
  • Issue 2 with 5C102E + cockroach on eBay(Posted here and not sales as it's not mine :)) Came across [URL="http://www.ebay.co.uk/itm/151225493166"]this[/URL] earlier - early Issue 2 board, …

    Hi, no I think. It is very good price for this rare Issue 2 version.:-)
    Many thanks for information Balford ! Now I must only wait for delivery :wink:
    MiH MiH February 2014 Hardware
  • Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …

    ... electrolytic capacitors regardless (as the issue 2 board means the machine is ... fact that you have a picture also means that the ULA ...
    1024MAK 1024MAK March 2014 Hardware
  • 48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …

    ... reckon it's good for issue 1-3 machines. Not a ... /> I'd say till Issue 2 then, as your picture shows one, until ... it's confirmed to be compatible with Issue ...
    bverstee bverstee March 2014 Hardware
  • 48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …

    ... ]I'd say till Issue 2 then, as your picture shows one, until ... it's confirmed to be compatible with Issue ...
    guesser guesser March 2014 Hardware
  • 48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …

    ... /> 5C102E
    5C112E
    5C112E-2
    6C001E-5
    6C001E ... possibilities.

    There's no 5C112E-1... so would the ... plain 6C001E and 6C001E-1/2. Possibly the conversion to the ... , Fuse has an option named 'Issue 2 keyboard', which is obviously a ...
    zub zub March 2014 Hardware
  • The Spectrum Resuscitation ThreadKicking off this thread as a place where people who are fixing/restoring Spectrums (or indeed any other piece of related hardware) can show off their…

    ... this thread:

    An issue 3B Spectrum bought from AmiBay ... connected it and there was no picture as I had been told ... 't get any kind of picture. I measured voltages from the ... rail was fine but still no life on -5V and +12V ...
    protek protek April 2014 Hardware
  • Issue 4S washed out pictureEvery single one of these ive had has a washed out display, no where near as crisp as the other issues ive had, Samsung did something there that has …

    ... inside an issue 2 of all things, this however had no cockroach or ... spider mod etc, upon firing the issue 2 up ... the 6C in, there was no need to do that.
    Macc Macc April 2014 Hardware
  • Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…

    ... The voltages between PIN 2-3 and 2-4 of the ... 3mV -> +0mV
    PIN 2-4: +28mV -warmup-> + ... increased, while the PIN 2-4 voltage decreased.
    ... The voltage between PIN 2-3 changed more during the ... a state, where there was no picture (AV mod) in cold ...
    jimre jimre April 2014 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…

    ... "? ;)

    @Ingo: I get no picture from composite, which I guess ... hole" ones.

    Actually no one demanded a revision "G ... then there will be an issue at the board. You should ... make sure that there is no short.

    BTW: I ...
    ingo ingo May 2014 Hardware
  • New user with a dead 48k issue 2Hello all I've found my way here from watching some excellent youtube videos by Joulesper Coulomb in an attempt to fix a issue 2 rubber key 48k I bo…

    ... markings are wrong on the Issue 2!), then rechecking voltage and going ... more knowledgeable than me will no doubt be along shortly with ...
    balford balford May 2014 Hardware
  • 48k issue 2I have an issue 2 spectrum 48k and wanted to know if i wanted to change the z80 is ther any fix so i dont have that 1 component hugging the z80 [img…

    ... transistor on the Z80 in issue 2 boards is there to fix ... put it.
    There is no electrical reason the transistor has ...
    1024MAK 1024MAK June 2014 Hardware
  • Plus board to 48kThis will sound daft to some no doubt, but is it ok to put a + mainboard into a 48k rubber keys one and expect the keys to work correctly? I have a …

    There is no special version of the board ... its keyboard membrane.

    Issue 2 boards need to have a ...
    Zorn Zorn July 2014 Hardware
  • Spectrum Show Magazine #2The Spectrum Show Magazine issue 2 is now available to download from my blog. Been a bit of a slog, but finally finished :smile: All the issues coul…

    ... ;778476]The Spectrum Show Magazine issue 2 is now available to download ... with adding to WOS, but no idea when that will happen ...
    gabriele amore gabriele amore July 2014 Announcements
  • New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…

    ... , and S-video on one +2. No fried TEA2000s so far and ... others and there's really no need to power up the ... with the cover off. The picture quality is gorgeous, and it ...
    rga24 rga24 July 2014 Hardware
  • X=Y=ZFirst public outing of X=Y=Z for the 48K Spectrum, a 4-level demo which can be download from: [as TZX] [URL="http://www.bobs-stuff.co.uk/extras/xyzd…

    ... the "Issue 2 Keyboard" setting ticked and unticked -- it made no difference ... ).

    It works fine in SpecEmu (with either Issue 2 ... or Issue 3 keyboard selected) so ... this is a Fuse issue or something else. I ...
    ccowley ccowley August 2014 Announcements
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Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
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    John Elliott on April 21
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