[BBC-Micro] Using a TFT screen for Beeb output

[Dominic Beesley]

I'm no expert on the BBC ouput hardware but would it be possible to hack the hardware to output the same line twice at double speed or would this be asking too much of the hardware? I've often wondered when I've been rearranging all the monitors on my desk!

Dom
  ----- Original Message ----- 
  From: Alex Taylor 
  To: bbc-micro at lists.cloud9.co.uk 
  Sent: Thursday, July 12, 2007 4:41 PM
  Subject: Re: [BBC-Micro] Using a TFT screen for Beeb output


  On 7/12/07, neil f <faz at nildram.co.uk > wrote:


    I have a TFT screen that has two switchable inputs, one of which
    is currently unused. Both inputs will accept 1V RGB and
    composite sync according to the spec. Vertical bandwidth starts
    at 50Hz, with horizontal starting at 30kHz. Assuming I attenuate 
    the Beeb's signals as necessary, is there any way I could get
    the monitor to produce some sort of display? 

  I'm not an expert on this, but going by the figures you've just given, I'm thinking that this isn't going to work. This is based on the 30kHz figure you've given, the Beeb's PAL output having a line rate of 15kHz. Unless of course you use some kind of scan-doubling device - I'll leave discussion of those to others :-) 

  -- 
  Alex Taylor



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