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Storing large LCM bitmap data in ROM

J.D. Chang

Hi,
As we knowed, a classsical 8051 supports a maximum of 64K bytes of code space.
When we have a large const data about screens( more than 64K bytes) and like to store them in ROM, which way of we can take?

thanks,

Parents
  • 0 in reply to J.D. Chang

    Where can I get the information about page register?

    I have no idea where anyone discuss a page register.

    Basically if you connect A16-A23 to port 1, port1 becomes your page register.

    Using a pager register instead of banking (while soooo much faster) does require some care. You need to have every 'entity' totally within a page or the code using page rerister becomes equally cumbersome for the processor to banking.

    Erik

Reply
  • 0 in reply to J.D. Chang

    Where can I get the information about page register?

    I have no idea where anyone discuss a page register.

    Basically if you connect A16-A23 to port 1, port1 becomes your page register.

    Using a pager register instead of banking (while soooo much faster) does require some care. You need to have every 'entity' totally within a page or the code using page rerister becomes equally cumbersome for the processor to banking.

    Erik

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