APPENDIXD. MEMORY CARD INTERFACE
When the capacity of a memory card is indicated, it usually represents an
unformatted capacity. The actually usable capacity of a memory card
slightly decreases after the card is formatted. This means that a memory
card that has a capacity larger than the total size of data and programs
actually stored needs to be used.
Example 1: When a battery backup file (with an SRAM size of 512KB)
is saved and restored in a batch, a memory card with a
capacity larger than 1MB is required.
Example 2: When a P–CODE macro program (with a size of 256KB) is
registered or saved, a memory card with a capacity larger
than 512KB is required.
When a flash memory card is used, the last 128KB of the memory card
is used as a buffer area, so that the usable capacity is further reduced by
Memory Card Capacity