ST20-C1 datasheet(172/205 Pages) STMICROELECTRONICS

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A.4

Miscellaneous constants

This section lists the constants which are used in this manual.

Name

Value

Meaning

BitsPerWord

The number of bits in a word.

BytesPerWord

The number of bytes in a word.

ExceptionBase

#80000040

The base of the exception descriptor area.

ExceptionProc-

essType

Bit 0 of exception vector table entry for an exception.

false

The boolean value ‘false’.

HighestException

255

Highest permitted exception level.

LongMode

smacloop Q15 data format.

LowestException

-7

Lowest permitted exception level.

MaxTimesliceCount

Maximum value of timeslice count.

MostNeg

#80000000

The most negative integer value.

MostPos

#7FFFFFFF

The most positive signed integer value.

NotProcess

MostNeg

#80000000

Used, wherever a process descriptor is expected, to indi-

cate that there is no process.

ProductId

Depends on

processor type.

A value used to identify the type and revision of processor,

returned by the

ldprodid instruction.

SavedTaskDescriptor

#800000008

Address where user process exception is saved when a

schedule exception trap occurs.

SchedulerQptr

MostNeg

#80000000

The address of the process list data structure for the

scheduler list.

ShortMode

smacloop Q31 data format.

true

The boolean value ‘true’.

UserProcessType

Bit 0 of exception vector table entry for a user process.

Table A.7 Constants

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