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Memory Mapping

Memory Mapping

This page came about after discussions in this discord thread:

Mapping Mechanism Priority

The MEGA65 has 3 mapping mechanisms:

  • HIGHEST PRIORITY = Register $D030

    • for mapping in C65 ROM chunks

  • LOWER PRIORITY = the “MAP” opcode mechanism

    • for more flexible mapping of ram/rom at a granularity of 8kb blocks

  • LOWEST PRIORITY = Register $01

    • for mapping in C64 ROM chunks

Overall Memory Layout

 

Register $D030