Align To Xx Byte Option - Agilent Technologies 1670G Series User Manual

Logic analyzers

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Symbol Utility Features and Functions

The OMF Symbol Browser Menu

Align to xx Byte Option

Most processors do not fetch instructions from memory on byte

boundaries. In order to trigger a logic analyzer on a symbol at an odd-

numbered address, the address must be masked off. The "Align to

Byte" option allows you to mask off an address.

The symbol "main" occurs at address 100F. The processor being probed

is a 68040, which fetches instructions on long word (4-byte)

boundaries. In order to trigger on the address 100F, the address must

be masked off to the nearest 4-byte boundary. The Align to Byte option

would be set to "Align to 4 bytes." The Symbol Utility masks the

address of the symbol "main" to 100C hex before it is used as a trigger