In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:

The memory from $00 to $0F is global.
All other memory is "bank switched" using FSR.
$10 to $1F is a bank - This is the bank used by SX/B for normal variables, all other banks are for arrays
$30 to $3F is a bank
$50 to $5F is a bank

Note that $00 to $0F is always available not matter what value FSR has.
So if you want to use memory from $30 to $3F you would set FSR to #$20.

It's really confusing, and one of the major reasons why SX/B was created.

Bean.

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