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  • 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…

    ... :
    - improved analog paths especially ground and VCC - additional capacitors
    video switching, audio on scart
    1024MAK 1024MAK August 2013 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…

    ... :
    - improved analog paths especially ground and VCC - additional capacitors
    video switching, audio on scart
    flopping flopping August 2013 Hardware
  • ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…

    ... +12V feed to the RGB / Video port. Use a convenient point ... the PCB for the 0V ground connection to the PSU.
    video out DIN connector, check if ...
    1024MAK 1024MAK August 2013 Hardware
  • ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…

    ... +12V feed to the RGB / Video port. Use a convenient point ... the PCB for the 0V ground connection to the PSU.
    video -menu presented - in black & ...
    DenisM DenisM August 2013 Hardware
  • ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…

    ... +12V feed to the RGB / Video port. Use a convenient point ... the PCB for the 0V ground connection to the PSU.
    1024MAK 1024MAK August 2013 Hardware
  • spectrum issue 6a oddityMorning everyone Bought a speccy (rubber key) from ebay in near mint condition - couldn't tune in on analogue particularly well so did the comp mod …

    ... as at least party a video problem. "The" videomod should insure ...
    roko roko September 2013 Hardware
  • Clashbasher a new interface to reduce colour clashI've been working on this for a while now. [IMG]http://markamy.uwclub.net/cauldron.JPG[/IMG] Basicly its an add on for a 48k spectrum, which reinte…

    uploaded a new video

    [url]http://youtu. ... -32
    jp enter
    loop
    ld l,e
    pop de
    jp pe,loop
    ret

    right ...
    Basher Basher September 2013 Hardware
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... . I have a 226T delay loop that could be replaced with ... play when writing into the video RAM? If so, that's ...
    stephenw32768 stephenw32768 September 2013 Development
  • 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…

    ... mini DIN RGB video socket:
    1 = 0V Ground
    2 = ... 150R
    4 = Green video
    5 = Audio out ... br /> 6 = Red Video
    7 = Blue Video
    8 = CSync ... they may be S-Video types (although the sellers ... ). If they are S-Video types, then these would ...
    1024MAK 1024MAK September 2013 Hardware
  • Didaktik video connectorI know it sounds a bit stupid, but what type are the Didaktik video connectors on the right hand side of the picture (link below)? One is labeled "TV…

    Hmm, feet back on the ground. Worked great on the Didaktik ... the TV nor on the video connector. I even tried an ...
    schombi schombi October 2013 Hardware
  • Video problem on grey +2I have a bad video problem on grey +2. The computer is in a poor shape, but the major problem is with the video. With a (known good) SCART cable I ca…

    ... fed 12V on pin 11, ground is on pins 9 and ... RGB signals and synthesise Composite Video for the modulator.
    If ... of hack, like feeding Composite Video on pin 20 (typically CSync ... switching between RGB and Composite Video modes. That scenario is entirely ...
    skagon skagon October 2013 Hardware
  • Video problem on grey +2I have a bad video problem on grey +2. The computer is in a poor shape, but the major problem is with the video. With a (known good) SCART cable I ca…

    ... (for example, pulling down Composite Video through a resistor).

    Video from pin 1 of the RGB socket (and ground from ...
    skagon skagon October 2013 Hardware
  • Video problem on grey +2I have a bad video problem on grey +2. The computer is in a poor shape, but the major problem is with the video. With a (known good) SCART cable I ca…

    ... Composite Video from pin 1 of the RGB socket (and ground from ...
    schombi schombi October 2013 Hardware
  • Assembly - Loops bigger than 255Hi, It looks like it's a bit difficult to make loops with more than 255 cycles on Z80 machine code, since the 16-bit decrements (DEC) do not alter a…

    ... ,loop_high
    loop:
    LD (HL),62 ; Fill the video memory with ... ; Loop length = 1024
    loop:
    LD (HL),62 ; Fill the video memory ... video memory with this number
    INC HL
    DJNZ loop ; inner loop ...
    Einar Saukas Einar Saukas October 2013 Development
  • I know it's part ZX81 but what's the rest of it?You can see the ZX81 motherboard in the corner but I have no idea what the rest does, it powers up but I haven't managed to get the screen to tune in…

    ... required is to route the video out that usually goes to ... (other connections are power and ground).

    At worst the ... be adjusted to ensure optimal video quality.

    B
    balford balford October 2013 Hardware
  • ZX48 svideo modI have modded a ZX48 to have svideo output. The end of C65 that goes to TR2 (its an Issue 2 zx 48 ) has been lifted to get Chroma. Luma is taken fro…

    ... . Luma is taken from where video signal is feed into the ... other end is connected to ground. Chroma and luma is fed ... you simply use the Composite Video input on the Modulator?
    Falco-F8L Falco-F8L October 2013 Hardware
  • One more grey +2 with video problemsI guess I need your help again to hopefully be able to do some proper troubleshooting myself one day. Here I have a grey +2, which could be a bottom…

    ... no time I had a video signal. Now TR9 stays cool ... , measure resistance between +12V and ground (probe both legs of C41 ... ), and between -12V and ground (probe both legs of C22 ...
    Falco-F8L Falco-F8L October 2013 Hardware
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... br /> ld a, 16 ; normal video
    out (c), a ; ... set video
    call set_init_pal ; set ... />
    ;THE 'MAIN EXECUTION' LOOP
    org 0x12a2
    main_exec ...
    jr z, wait_key1 ; loop if no key pressed
    chev chev October 2013 Development
  • Finders Keepers+I know a few of you are interested in this project so I thought it was about time I started a proper thread for it rather than just slipping bits int…

    ... could put in a delay loop to emulate the original speed ... unnecessary reads and writes in video contended memory as this was ...
    David Jones David Jones November 2013 Development
  • +3 with dead expansion portI bought a +3 from a WoS user. So far, the computer works as expected, but when an interface (e.g. DivIDE (configured correctly) or Multiface3) is co…

    ... push reset.
    - When the video test (that screen with a ... (I doubt you have serial loop plugs), but you'll be ...
    Zup Zup November 2013 Hardware
  • +3 with dead expansion portI bought a +3 from a WoS user. So far, the computer works as expected, but when an interface (e.g. DivIDE (configured correctly) or Multiface3) is co…

    ... push reset.
    - When the video test (that screen with a ... (I doubt you have serial loop plugs), but you'll be ...
    The_Bert The_Bert November 2013 Hardware
  • Small demo to show my sprite engine for ZX Spectrum 48KThis demo shows 13 sprites moving at 50fps totally flicker free: 12 enemies bouncing in edges and the main character, controllable with OPSA (note S …

    ... swap between normal and shadow video memory. The idea is first ... more than just a busy loop, but this is more work ...
    Alcoholics Anonymous Alcoholics Anonymous December 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…

    ... the loss of whichever non-ground supply line was shorted out ... connections via say the UHF/Video/Audio leads AND the 0V ...
    1024MAK 1024MAK December 2013 Hardware
  • Settings on oscilloscope to see composite video signalHello, Learning a bit more about my new Owon digital 2 chan. oscilloscope. Would like to know what settings I should use to view a composite signal…

    ... started being equipped with basic video displays. "Digital" RGB just ... Select the correct scale / range, ground the input, move the displayed ... you want the ground level to be, un-ground the input, ... the voltage difference compared to ground.

    To ...
    1024MAK 1024MAK December 2013 Hardware
  • Settings on oscilloscope to see composite video signalHello, Learning a bit more about my new Owon digital 2 chan. oscilloscope. Would like to know what settings I should use to view a composite signal…

    ... started being equipped with basic video displays. "Digital" RGB just ... Select the correct scale / range, ground the input, move the displayed ... the voltage difference compared to ground.

    To ... 'm using RGB and composite video for the Sync.
    ...
    thomas3120 thomas3120 December 2013 Hardware
  • 128K RGB Display problem.I have just got my hand on a toast rack, but when powered and connected to the telly the picture jumps horizontally at random intervals. Could it be…

    ... mode (NOT composite or S-Video mode), PAL colour (as some ... SCART plug. Connect the 0V/ ground/ negative (if using a separate ...
    1024MAK 1024MAK December 2013 Hardware
  • 128K RGB Display problem.I have just got my hand on a toast rack, but when powered and connected to the telly the picture jumps horizontally at random intervals. Could it be…

    ... mode (NOT composite or S-Video mode), PAL colour (as some ... SCART plug. Connect the 0V/ ground/ negative (if using a separate ...
    Lost Lost December 2013 Hardware
  • Beepola v1.08 AvailableA new version of Beepoa, v1.08, is now available for download from:- [url]http://freestuff.grok.co.uk/beepola/[/url] (1.76MB zipped exe, no installe…

    ... 't experimented) as the sound loop would end up taking a ... the size of the sound loop) if you have a purpose ... music of sorts by doing video stuff. I never looked into ...
    ccowley ccowley January 2014 Announcements
  • Almost no picture on a toastrack Issue 6UI?d need some help with a toastrack, that hardly shows any picture on both the RF and RGB. It?s totally distorted. I had this before and I remembered…

    ... reduce sound interference on the video picture...

    C121 is ... video output on pin 1 (and ground, pin 2) on the RGB/Video ...
    1024MAK 1024MAK January 2014 Hardware
  • New Game:Killer BeesI have ported one of my favourite games for the Phillips G7000 to the ZX Spectrum. Killer Bees, I spent hours playing this as a kid. The original g…

    ... instant, mucked with the video controller registers in some way ... as to mess up the video signal, then undid this ... I positioned some other video element on top of the ... in the rest of the loop. The strategy to defeat ... the robot into a tighter loop, or to move the ...
    BobHarris BobHarris February 2014 Brand new software
<1…19202122232425…34>

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