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<1…14151617181920…28>
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... instrucitons for best understanding of GAL function.
    velesoft velesoft August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... ... the CLK input of the GAL doesn't seem to be ... a normal input. If this GAL is being used in combinatorial ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... about what's inside the GAL (click for full resolution)
    GAL as a combinational device, but ... two unused pins in the GAL. Of course, this is only ... /> I don't think this GAL is used in registered mode ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... ... the CLK input of the GAL doesn't seem to be ... a normal input. If this GAL is being used in combinatorial ...
    velesoft velesoft August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... the device powered, or is GAL fuse programming active even if ... , which use "real" fuses, but GAL's... don't they use ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... see more adress pins on GAL then port adressation can be ...
    velesoft velesoft August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... see more adress pins on GAL then port adressation can be ... , I've updated my proposed GAL schematic to fix the EPROM ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    Logic equations for GAL chip are complete. But I need verify it in compiler... :-)
    velesoft velesoft August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... =velesoft;644553]Logic equations for GAL chip are complete. But I ... about what's inside the GAL?
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... about what's inside the GAL?[/QUOTE]

    You have ... GAL programmer ?
    I can send ...
    velesoft velesoft August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    [QUOTE=velesoft;644559]You have GAL programmer ?
    I can send ... /> Yes, I've got a GAL programmer. I can make vector ... for comparing the "correct" GAL against your GAL, and/or test the ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    [QUOTE=mcleod_ideafix;644565]Yes, I've got a GAL programmer. I can make vector tests for comparing the "correct" GAL against your GAL, and/or test the proposed equations in the real device.[/QUOTE]

    See private message
    velesoft velesoft August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... real device with the original GAL:

    - Port FF6F uses ... level at pin 16 of GAL (about 4V). A "0" written ... happen). This confirms that the GAL has a latch implemented for ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... written my own version of GAL, based upon the schematic I ... 't work?
    - With original GAL, when the computer (128K toastrack ... in 128K BASIC. With this GAL, it boots in 48K mode ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... ( and GAL20V8 ) : after power-on GAL chip active internal pull-down ...
    velesoft velesoft August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... in log.1.
    Theoreticaly GAL randomly connect or disconnect messenger ...
    velesoft velesoft August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... and mines with the same GAL, a Lattice GAL16V8D-10LP . Note ... is different from the original GAL, a GAL16V8-25LNC (I don ... /> Could it be that the GAL I'm using is too ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... works ok with the original GAL, though.
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... works ok with the original GAL, though.[/QUOTE]

    Test ... of output signals on original GAL and new GAL prototype ;-)
    velesoft velesoft August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... the poweron conditions of the GAL with your equations or mines ... is configured for the exact GAL chip I'm using. That ... GAL is the same I'm ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    Just to make sure that my computer is not causing this, I've changed to a +2 grey. Now your GAL boots fine everytime (as mine), but in 48K mode. If I do a OUT 32765,0 it boots again with ROM 0, showing the menu. My equations too.
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    Video of +2 grey booting (reset button) with SAM Messenger, GAL in test:
    [url]http://www.atc.us.es/~rodriguj/plusgrey_booting_sam_messenger_gal_test.avi[/url]

    Here you will see that the computer seems to boot twice.
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... FETCHNMI any meaning for the GAL to lock or unlock the ... some test with the original GAL, the +2 grey has booted ... 're working on. With original GAL this has happened far less ... times than with the replacement GAL's though (one or twice ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    [QUOTE=obo;644851]Or could it just be to set a consistent state for the SAM to see?[/quote]
    Most probably :) I've just checked that the initial state of SERIALOUT isn't important during boot-up (checked with the original GAL)
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • Issue 2 Failed 48k to 128k upgradeI have been trying to upgrade my Issue 2 with the help of Velesoft, using this schematic; [IMG]http://i764.photobucket.com/albums/xx284/arioch1973/4…

    Where can i get the code of the GAL? i want to try it.
    flopping flopping August 2012 Hardware
  • Issue 2 Failed 48k to 128k upgradeI have been trying to upgrade my Issue 2 with the help of Velesoft, using this schematic; [IMG]http://i764.photobucket.com/albums/xx284/arioch1973/4…

    ... the code to program the GAL, send a private message to ...
    Johan1973 Johan1973 August 2012 Hardware
  • Issue 2 Failed 48k to 128k upgradeI have been trying to upgrade my Issue 2 with the help of Velesoft, using this schematic; [IMG]http://i764.photobucket.com/albums/xx284/arioch1973/4…

    [QUOTE=flopping;644913]Where can i get the code of the GAL? i want to try it.[/QUOTE]

    here:
    [url]http://velesoft.speccy.cz/other/48to128upgrade_with_ay.zip[/url]
    velesoft velesoft August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    ... /> [B]TESTED ONLY WITH ORIGINAL GAL[/B]

    I test ...
    velesoft velesoft August 2012 Hardware
  • Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…

    I modify MESSENGER rom for use in DIVIDE ram/rom. DivIDE yet need only MIDI ports and work as messenger. ZX+MESSENGER(with my GAL) < > SAM COUPE and midi transfer work same as with original GAL.
    velesoft velesoft August 2012 Hardware
  • Sending key presses to the spectrumfor a project I want to send automated keyboard presses to the ZX via a micro-controller. Is it possible to send these through the expansion slot? …

    ... can even use a small GAL to combine the 8-to ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
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