84PCE:Ports:1002
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Revision as of 13:47, 5 April 2015 by Calc84maniac (Talk | contribs)
Synopsis
Port Number: 1002
Function: Memory-mapped flash chip size.
Details
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.
