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Bitfields for feature byte 4

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Bit Description

7

IBM "private" (set on N51SX, CL57SX)

6

system has EEPROM

5 - 3

ABIOS presence
001 - not supported
010 - supported in ROM
011 - supported in RAM (must be loaded)

2

"private"

1

system supports memory split at/above 16M

0

POSTEXT directly supported by POST

See Also:

#00509,#00512,#00514