PETSCII control codes¶
Control codes recognized by the .seq decoder.
Row terminators¶
| Code | Meaning | Behavior |
|---|---|---|
$0D |
Return | Flush row, start new row |
$8D |
Shift+Return | Flush row, start new row |
$88 |
F7 | Flush row, start new row |
When any row terminator immediately follows an auto-wrap (a row that reached the column limit), the terminator is ignored to prevent a spurious blank row. All three codes are handled identically.
$88 is the F7 key code. C*Base uses it as a soft line break in message text — the BBS inserts it at word boundaries to wrap long lines before sending them to the terminal.
Color codes¶
| Code | Color | Index |
|---|---|---|
$90 |
Black | 0 |
$05 |
White | 1 |
$1C |
Red | 2 |
$9F |
Cyan | 3 |
$9C |
Purple | 4 |
$1E |
Green | 5 |
$1F |
Blue | 6 |
$9E |
Yellow | 7 |
$81 |
Orange | 8 |
$95 |
Brown | 9 |
$96 |
Light Red | 10 |
$97 |
Dark Grey | 11 |
$98 |
Grey | 12 |
$99 |
Light Green | 13 |
$9A |
Light Blue | 14 |
$9B |
Light Grey | 15 |
Color codes change the foreground color for all subsequent characters until another color code is encountered. The initial default foreground is Light Blue (index 14).
Special codes¶
| Code | Meaning | Behavior |
|---|---|---|
$12 |
Reverse ON | Characters drawn with foreground and background swapped |
$92 |
Reverse OFF | Normal character drawing resumes |
$93 |
Clear Screen | CLS boundary; optional green line when Show CLS ($93) is on |
Stripped codes¶
The following codes are consumed silently and produce no output:
$00 NUL, $03 RUN/STOP, $0A LF, $08 C=-Shift disable, $09 C=-Shift enable, $0E lowercase charset switch, $0F unused, $11 cursor down, $13 Home, $17 cursor right variant, $1D cursor right, $8E uppercase charset switch, $85–$87 F1–F3, $89–$8C F5–F8, $91 cursor up, $94 Insert, $9D cursor left.
Any other byte in the control range (< $20 or $80–$9F) not listed above is rendered as a placeholder middle-dot character (·).