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Port Number: 1002

Function: Memory-mapped flash chip size. This port is only applicable to older devices which feature a parallel flash chip.


Bits [2:0]

Sets the flash chip size. 06 is the default (4 MB). 07 will map 8 MB, which will cause the 4 MB to be mirrored twice. Smaller values map less flash, possibly down to 64 K.

Bit 3

When this bit is set, the flash mapping is forced to 64KB (the equivalent of a 0 in bits 0-2).

Bits [7:4]

Writes have no apparent effect, value does not latch.