Visible control characters
Normally, 3270 start field characters are displayed as blanks. For debugging purposes, these characters can be made visible.
Codes
Control characters within a field are displayed using the host-specified field colors with an underline:
| Code | Meaning |
|---|---|
. |
EBCDIC NUL |
< |
EBCDIC SO (X'0E', shift to DBCS) |
> |
EBCDIC SI (X'0F', shift to SBCS) |
Start Field characters are underlined, yellow, and on wc3270, in reverse video, using special codes:
| Code | Visible | Protected | Highlighted | Selectable | Numeric | Modified |
|---|---|---|---|---|---|---|
| 0 | Visible | |||||
| 1 | Visible | Modified | ||||
| 2 | Visible | Selectable | ||||
| 3 | Visible | Selectable | Modified | |||
| 4 | Visible | Highlighted | Selectable | |||
| 5 | Visible | Highlighted | Selectable | Modified | ||
| 6 | ||||||
| 7 | Modified | |||||
| 8 | Visible | Numeric | ||||
| 9 | Visible | Numeric | Modified | |||
| A | Visible | Selectable | Numeric | |||
| B | Visible | Selectable | Numeric | Modified | ||
| C | Visible | Highlighted | Selectable | Numeric | ||
| D | Visible | Highlighted | Selectable | Numeric | Modified | |
| E | Numeric | |||||
| F | Numeric | Modified | ||||
| G | Visible | Protected | ||||
| H | Visible | Protected | Modified | |||
| I | Visible | Protected | Selectable | |||
| J | Visible | Protected | Selectable | Modified | ||
| K | Visible | Protected | Highlighted | Selectable | ||
| L | Visible | Protected | Highlighted | Selectable | Modified | |
| M | Protected | |||||
| N | Protected | Modified | ||||
| O | Visible | Protected | Numeric | |||
| P | Visible | Protected | Numeric | Modified | ||
| Q | Visible | Protected | Selectable | Numeric | ||
| R | Visible | Protected | Selectable | Numeric | Modified | |
| S | Visible | Protected | Highlighted | Selectable | Numeric | |
| T | Visible | Protected | Highlighted | Selectable | Numeric | Modified |
| U | Protected | Numeric | ||||
| V | Protected | Numeric | Modified |