General Category > Discussion - EVE

Long text on BT 815

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FlorianG:
Hi,

do you know if it is possible to display long texts with the BT 815 chip?  I use the Gameduino 3x Dazzler so it is equipped with 8 mega of external RAM.  if I display too much text it crashes because I suppose I am saturating the list of instructions.  List which is too small and remains a big limitation on these chips. 

Ps. my CPU is at teensy 4.0

BRT Community:
Hi,

Could you advise what lengths of strings you were needing to use?

Best Regards, BRT Community

FlorianG:
Thank you for your reply. 
It can be long text of more than 2000 characters

BRT Community:
Hi,

In addition to a few instructions for the actual setup of the font bitmap properties, each character will require at least a Vertex command.

For characters which are beyond the reach of VERTEX2II (e.g. more than 511) there is also a CELL() instruction since EVE needs to use VERTEX2F and that needs a preceding command to set which cell/character.

Therefore, you should budget at least 4 bytes per character and 8 bytes in some cases.

if the text is fixed, you may be able to write it to a bitmap or display it and take a snapshot after start-up and that would save some DL space by displaying the sentence as a bitmap.

Best Regards, BRT Community

FlorianG:
Thank you for your response but I can't.  the text is dynamic.
we can't use the 8m of external ram?

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