LB Booster - Flashing text

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BASIC code examples (Moderator: Richard Russell)

Flashing text

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Topic: Flashing text (Read 152 times)

Richard Russell
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Flashing text
« Thread started on: Dec 16^th, 2017, 9:26pm »

Somebody asked about flashing text. This is cheating:

Code:

    print chr$(22); chr$(7);
    print chr$(136); "Flashing text"

Richard.

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RNBW
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Re: Flashing text
« Reply #1 on: Dec 17^th, 2017, 10:32am »

Hi Richard

It works in LBB, but I couldn't get it to work in any of the other BASICs I have access to.

How does it work?

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Richard Russell
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Re: Flashing text
« Reply #2 on: Dec 17^th, 2017, 12:56pm »

on Dec 17^th, 2017, 10:32am, RNBW wrote:

How does it work?

As I said, it's cheating! The first line:

Code:

print chr$(22); chr$(7);

is equivalent to Code:

VDU 22,7

which is equivalent to Code:

MODE 7

which selects the BBC Micro's Teletext/Videotex mode. The second line is just the Videotex control code for 'flash' followed by the text. Not really useful, but interesting (maybe).

Richard.

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