Panasonic fp2/fp2sh - Page 234

FP2/FP2SHIC Memory Card
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7.4 For Use as Expansion Memory
2) Using the remaining DOS formatted field
All of the remaining DOS formatted field can be used as expansion memory.
Example: When 512 kB is set as the DOS formatted field in a 1 MB card
Expanded memory field
512 kB
DOS
Address
0
262144
512 kB
1MB