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  • 5C series NTSC ULA 5C114E 8248Not sure if this has been mentioned before; I haven't seen anything about it online. Chris Smith's book discusses 6C011E as the NTSC ULA sold in Spec…

    What's odd about that picture is the modulator. UM1233 is ... those 48k, I got 16 rom cartridges, (5 different titles) already ...
    rga24 rga24 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…

    ... directly change between Test Rom and Speccy Rom as they occupy the ... dark, compared to the usual picture I get with a SPECTRA ...
    Simon_Carr Simon_Carr April 2014 Hardware
  • Something I made in Minecraft...So, this is what I do in my spare time these days (when I'm sure a lot of you will be screaming for me to come back to Speccy-land; I assure you I wi…

    ... that the ZX80's 4K ROM used - and as I'd ... />
    Really impressive your ZX80 picture! I had a go of ...
    malczx malczx May 2014 Chit chat
  • Spectrum Plus display issueHi, does anyone know if this is fixable at all by someone with no experience? From looking on a similar post on World of Spectrum forum they mention…

    ... say, since you have TV picture, ULA chip is probably ok ... . But because picture is not uniform (i.e ... you have to reseat the ROM chips (if they are not ... can fetch data correctly from ROM chips. Tell me if you ...
    Jimmy Falcon Jimmy Falcon May 2014 Hardware
  • Dot crawl?Hi, As I'm rather new to the hardware of the spectrum, just to confirm: is this video showing "Dot crawl" ? [url]https://www.youtube.com/watch?v=_U…

    ... them with Interface 2 type ROM socket and I'm satisfied ... , just because of the excellent picture quality (see below).

    jimre jimre May 2014 Hardware
  • Dot crawl?Hi, As I'm rather new to the hardware of the spectrum, just to confirm: is this video showing "Dot crawl" ? [url]https://www.youtube.com/watch?v=_U…

    ... hear that! That crystal clear picture without the dot crawl is ... 't know why but AMI ROM in the newer mainboard models ...
    jimre jimre June 2014 Hardware
  • Diagnostic Board (Winston designed) PCB'sHi everyone, I had these made earlier in the year, built mine then promptly mislaid the others until now :) and I'd like to offer these to the commu…

    ... welcome :) Regarding the 2nd picture, what ROM were you using? If it ...
    balford balford June 2014 Sales
  • Diagnostic Board (Winston designed) PCB'sHi everyone, I had these made earlier in the year, built mine then promptly mislaid the others until now :) and I'd like to offer these to the commu…

    ... "The Gosh Wonderful ZX Spectrum ROM - Version 1.32" as second ... rom in this machine :)
    I ... , have some bars on screen, picture is stable, when I put ...
    gorski gorski June 2014 Sales
  • Latin-1 font for FZXI'm currently creating some [URL="http://en.wikipedia.org/wiki/Latin-1"]Latin-1[/URL] (ISO 8859-1) characters to be added into [URL="http://www.world…

    ... opinion. Anyway, there is a picture of them (look the samples ... , a non printable character (Spectrum ROM doesn't follow ASCII standard ...
    TK90XFan TK90XFan June 2014 Development
  • MISSING M1 LINE ON +48????I was posting questions about my DIVMMC enjoy not working on one of my +48`s and have now got round to testing if its cpu related.Trouble is the one …

    ... sometimes may work, but have picture artifacts).

    Also note ... have it's own ROM (or EEPROM, Flash ROM or EPROM). In ... then switch it's own ROM into the memory map of ... time switching out the Sinclair ROM.

    For some Z80 ...
    1024MAK 1024MAK July 2014 Hardware
  • Help Me Identify Mystery Speccy PlzI was Given A box of speccy stuff and in it i got a nice surprise it included a really nice spectrum but ive not seen it before its a cross between …

    ... and i looked at the picture that was posted in this ... a uk keyboard and uk rom
    which ties in with ... the keys but heres a picture to enjoy let me know ...
    zedexspectrum zedexspectrum July 2014 Hardware
  • Help Me Identify Mystery Speccy PlzI was Given A box of speccy stuff and in it i got a nice surprise it included a really nice spectrum but ive not seen it before its a cross between …

    ... and i looked at the picture that was posted in this ... a uk keyboard and uk rom
    which ties in with ... the keys but heres a picture to enjoy let me know ... , but I did test the rom in a spare +2 grey ... it also was a UK rom. The rom IC was an odd ...
    Your Spec-chum Your Spec-chum July 2014 Hardware
  • ZX Spectrum 48K AV IssueOK so I dugout my old 48K Speccy today and decided to AV mod it. I did the mod (pretty easy) but the picture I am getting is this. [url=http://posti…

    ... on the data bus as picture information. I wonder whether the ... CPU from properly accessing the ROM might also cause this. Though ...
    Zorn Zorn August 2014 Hardware
  • Question for ZX81 GurusI have an ISSUE 1 ZX81 with a 2C184E ULA. If I ever need to change it, can I use one of the newer 2C210E ULAs? If I can, are there any other mods th…

    ... OK and gives a good picture.

    The Issue 1 ... with the board - dead ULA, ROM or Memory - I've already ... faulty 184 leaving only the ROM and memory if it still ...
    rune rune August 2014 Hardware
  • Next step for fixing my speccy?Hi guys, I've picked up my faulty Spectrum aiming to fix it. So I followed the excellent JouledperCoulomb videos on Youtube for the basics and I am …

    ... shows that the CPU and ROM are working, and any failed ... /> Could you post up a picture of the display, or better ...
    balford balford August 2014 Hardware
  • Next step for fixing my speccy?Hi guys, I've picked up my faulty Spectrum aiming to fix it. So I followed the excellent JouledperCoulomb videos on Youtube for the basics and I am …

    ... shows that the CPU and ROM are working, and any failed ... /> Could you post up a picture of the display, or better ...
    Spekkie Spekkie August 2014 Hardware
  • Skool Daze & Back To Skool discussionFollowing my video of Back To Skool ( [url]http://youtu.be/4K2ZUkTOT0g[/url] ) I just wanted to see if these two games are still fondly remembered b…

    ... , so a copy of the ROM and the screen would be ... .

    Just noticed the picture of the teacher on the ...
    Ritchie333 Ritchie333 August 2014 Games
  • ZX81 ULA questionRecently, I got a nice bundle of kit comprising of a ZX81, Memotech keyboard, PSU and brand new 16K Sinclair Memory pack. The ZX81 has a ULA with no…

    ... in ROM.

    As for the resultant screen display, a picture ...
    balford balford August 2014 Hardware
  • Better arrangement for video memory?While doing some documentation work for the ZX-Uno project, I compared the advantages of the weird layout of the ZX Spectrum against a linear layout.…

    ... uses when scanning the television picture to answer your question.
    The ROM, afair, does calculate the pixel ...
    mcleod_ideafix mcleod_ideafix September 2014 Development
  • Did you know.. Disciple edge connectorDid you know the edge connector used on the Disciple is actually identical to that from the Interface 1? [IMG]http://www.benophetinternet.nl/hobby/v…

    ... using an Interface 1 with ROM version 1 and blown ULA ... />
    I may post a picture later! It was a very ...
    geosiou geosiou September 2014 Hardware
  • Issue 4s - Not 'Jailbars' but lines alloverIt's not another 'Jailbars' question!, but I've got this Issue 4S that aside from the 'Jailbars' on the Paper area of the screen which I can live wit…

    ... signal is interfering with your picture.

    First: the ... can be seen in the picture you posted with the (C ... />
    Third: judging by this picture, there are no visible interferences ... LOAD routine is stored in ROM, which is not contended. It ...
    mcleod_ideafix mcleod_ideafix September 2014 Hardware
  • ZX81 and Analogue TVsI recently bought a really nice ZX81 on ebay in amazing condition, but I'm having issues tuning in an old analogue TV to lock onto the signal. I und…

    ... ULA generate a TV picture which lacks the “back ... manufacturers for the mask ROM, and sometimes used EPROM ... code. The first (“old” ROM) code has a significant ... one byte of the ROM code so reducing the ... the “improved” or “new” ROM) corrects this bug. However, the ...
    1024MAK 1024MAK September 2014 Hardware
  • Sinclair Today...Based on your experiences and knowledge of how Sinclair Research operated back in the 1980s, if they were to announce a new Sinclair branded PC or La…

    ... used (the QL monitor mode picture is wider than most monitors ... of eight 64k bit chips), ROM again not too much of ... BASIC (SuperBASIC). In the final ROM's a significant number of ...
    1024MAK 1024MAK September 2014 Hardware
  • 'Interesting' Issue 2 modSo I've been lurking on this forum for a while and I've got to the point where I want to see if I can repair a speccy.. so I bought me a 'broken' one…

    ... Z80 and working ROM, you will see a structured picture, but the ... between the Z80 and the ROM/floating bus or random data ...
    1024MAK 1024MAK October 2014 Hardware
  • 'Interesting' Issue 2 modSo I've been lurking on this forum for a while and I've got to the point where I want to see if I can repair a speccy.. so I bought me a 'broken' one…

    ... Z80 and working ROM, you will see a structured picture, but the ... between the Z80 and the ROM/floating bus or random data ...
    blueowl0708 blueowl0708 October 2014 Hardware
  • Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…

    ... Spectrum+ had the same ROM checksum 7758 that was not ... interrupt 0001.

    Picture from the "faulty" Spectrum+

    Picture from the faulty Spectrum+:

    Picture from the "working" Spectrum+
    Korinel Korinel November 2014 Hardware
  • +2b borkedwell not completely I get this when I hit the NMI on my multiface 3 (so that negates the use of my divides too), the yellow/green stripes flash [IM…

    ... filling with 0x0039" when the rom is missing, but with different ... ? hard to tell from the picture but it looks like blue ...
    guesser guesser November 2014 Hardware
  • +2b borkedwell not completely I get this when I hit the NMI on my multiface 3 (so that negates the use of my divides too), the yellow/green stripes flash [IM…

    ... filling with 0x0039" when the rom is missing, but with different ... ? hard to tell from the picture but it looks like blue ... 'll have take a better picture, going to try the advice ...
    BiNMaN BiNMaN November 2014 Hardware
  • RobikHello to all, Is anyone experienced on this russian clone? I have one at hand with corrupted screen (but it boots and replies to keyboard inputs so …

    ... : check the voltages, RAM, Z80, ROM.

    There's a ... whenever they look at the picture you provided us with.
    pkersey pkersey January 2015 Hardware
  • Distributing speccy software with emulator: best choice?Hi, what emulator you would choose to distribute with your game? I know some emulators accept tap or file as parametr but was is the best emulator f…

    ... /> Iv re-Added the loading picture, since instant load obviously doesn ... = @TempDir & "\SpecInUse\" & "pentagon.rom"
    $Path4 = @TempDir & "\SpecInUse ... \" & "trdos.rom"
    $Path5 = @TempDir & "\SpecInUse ...
    kgmcneil kgmcneil February 2015 Development
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  • Is it possible to run a single BASIC line via a ROM CALL of the Standard ZX 48k ROM?On: https://cygnus.speccy.cz/popis_trdos-assembler.php<br /> <br /> I found the following code:<br /> [code]<br /> CHADD equ 23645 ; Location of…
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