Opcodes A-3

pushTop

Description:

Pushes the current top of the stack onto the stack (that is, it reads the top of the stack and pushes the value onto the stack). The size of the push is determined by the size of the contents of the stack.

Storage Needed:

1 byte

pushSAGM

Description:

Pushes the source address group mask (SAGM) onto the top of the stack. The SAGM is a bitmap representing the groups to which the source address of a packet belongs. This instruction pushes 4 bytes onto the stack.

Each address group is represented by a single bit in the SAGM.

Multicast addresses (including broadcast addresses) are in all groups.

Storage Needed:

1 byte

pushDAGM

Description:

Pushes the destination address group mask (DAGM) onto the top of the stack. The DAGM is a bitmap representing the groups to which the destination address of a packet belongs. This instruction pushes 4 bytes onto the stack.

Each address group is represented by a single bit in the DAGM.

Multicast addresses (including broadcast addresses) are in all groups.

Storage Needed:

1 byte

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3Com 2200 manual PushTop, Byte PushSAGM, Byte PushDAGM