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the wiki is not a C primer
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This stores the ''System Mode'', ''Affinity Mask'' and ''Ideal Processor'' values in one byte. They are stored as follows:+ u8 Flag0 = (SystemMode << 4 | AffinityMask << 2 | IdealProcessor);+And can be retrieved as follows:+ u8 SystemMode = (Flag0>>4)&0xF;+ u8 AffinityMask = (Flag0>>2)&0x3;+ u8 IdealProcessor = (Flag0>>0)&0x3;+
==== Flag0 ====
==== Flag0 ====
−{| class="wikitable" border="1"
−|-
−! Bits
−! Description
−|-
−| 0-1
+| Ideal Processor
+|-
+| 2-3
+| Affinity Mask
+|-
+| 4-7
+| System Mode
+|}
In the exheader data, the IdealProcessor field is a bit-index, while in the accessdesc the IdealProcessor field is a bitmask. When the bit specified by the exheader field is not set in the accessdesc field, an error is returned. "if((1<<exheaderval) & accessdescval == 0)return error"
In the exheader data, the IdealProcessor field is a bit-index, while in the accessdesc the IdealProcessor field is a bitmask. When the bit specified by the exheader field is not set in the accessdesc field, an error is returned. "if((1<<exheaderval) & accessdescval == 0)return error"
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{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
−! Bit
+! Bits
! Description
! Description
|-
|-