12-08-2015, 02:51 PM
The DS1287 is a well known problem unit when its battery starts to run down...
See http://www.mcamafia.de/mcapage0/dsrework.htm
and http://www.classic-computers.org.nz/blog...y-chip.htm
The problem is in the 50 bytes of RAM in the unit that are protected by the lithium battery - as the battery fails, their content becomes corrupt.
The standard replacement is the DS12887-series - however, the RAM will be blank
See http://www.mcamafia.de/mcapage0/dsrework.htm
and http://www.classic-computers.org.nz/blog...y-chip.htm
The problem is in the 50 bytes of RAM in the unit that are protected by the lithium battery - as the battery fails, their content becomes corrupt.
The standard replacement is the DS12887-series - however, the RAM will be blank
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