FT//ex 1000 & 1500 - parity problem with
16Mb SIMMs
A potential problem exists when fitting 16Mb SIMMs in FT//ex 1000 and
1500 systems only. The problem will be with 16Mb (4M x 36bit) 60nS SIMMs made by Micron
supplied as Mitsubishi Electric PC Division’s part number 15717331. They can be
identified as Micron MT9D436M-6.
It is possible for the same part number to be supplied as a Samsung part
– in this case the problem does not occur.
At power on the memory is counted, then a blue information panel at top
of screen is displayed followed by the error:-
RAM Parity Error
Press ESC to turn off NMI or other key to reboot.
This normally indicates that non-parity memory is fitted and pressing
ESC allows you to run without using parity.
The problem is isolated to fitting of the Micron part in sockets 1 and 2
only. For example a machine with four 16Mb SIMM’s fitted where Samsung parts are in
sockets 1 & 2 and Micron parts are in sockets 3 & 4 functions correctly.
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