The format of the records represented in this topic is:
| Offset |
Size (bytes) alignment (bits) |
Field name |
Description |
|---|
| Dec |
Hex |
|---|
| |
|
|
|
|
The meanings are:
- Offset
- The numeric address of the field relative to the beginning of
the data area.
- Dec Hex
- The first number is the offset in decimal, followed by the hexadecimal
equivalent in parentheses. Example: 16 (10).
- Size (bytes)
- The field size in bytes.
- Alignment (bits)
- This column also shows the bit settings of switch fields. Significant
bit settings are shown and described. Users should not use the reserved
bits. The alignment or state of the bits in a byte is as follows:
- .... ....
- The eight bit positions (0 through 7) in a byte. For ease of
scanning, the high-order (left-hand) four bits are separated from
the low-order four bits.
- .x.. ....
- A reference to bit 1.
- 1... ....
- Bit zero is on.
- 0... ....
- Bit zero is off.
- .... ..11
- A reference to bits 6 and 7.
- Field name
- A symbol that identifies the field.
- Description
- The use of a field. Where the field's use relates directly to
a value coded by a user, the coded value is shown. Where the hexadecimal
code for a particular bit setting would be helpful, it is shown separated
from the rest of the description.