BANK WRITE bank FROM address1 TO address2 SIZE size
This instruction can be used to write a number of bytes to an out-of-memory bank from main memory. You must therefore indicate one of the available banks, the memory address from which you want to copy, the size in bytes and finally the destination address (the $0000 implies the beginning of the bank), which will be the bank memory.
BANK WRITE 1 FROM $0100 TO $2000 SIZE 128
BkW#
If you have encountered a problem using this command, if you think there is a bug or the explanation is unclear, please open an issue for this keyword on GitHub. Thank you!