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Spectrum FPGA clone with HDMI video output by Jozsef Laszlo

mcleod_ideafixmcleod_ideafix
edited July 2013 in Hardware
This clone is based upon the ULA core I wrote for opencores.org . It features a scandoubler and HDMI conversion engine. Jozsef has found that a 28MHz pixel clock HDMI output is accepted by HDMI capable equipment, although it's not a standard mode. This means that the screen refresh operation follows the same timmings as in the standard Spectrum, without the need of double buffering as Winston first suggested.

The FPGA used is a Spartan 6 device. The same kind of Spartan Winston wants to use for his HDMI capable ULAplus device.

Read his description here:
http://joco.homeserver.hu/zxpipi/
Post edited by mcleod_ideafix on

Comments

  • JeffBJeffB
    edited July 2013
    Interesting..... :)
  • WinstonWinston
    edited July 2013
    mcleod_ideafix wrote: »
    Jozsef has found that a 28MHz pixel clock HDMI output is accepted by HDMI capable equipment, although it's not a standard mode.

    Well that will save a bunch of CLBs and block RAM :-) An edge-connector based converter might fit fine in the smallest Spartan-6 potentially making it a pretty inexpensive adapter.

    Don't see the Verilog source for his project though. I'd like to port it to the Atlys board I have and play around with it a bit. I hope he's planning on releasing it.
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