|ASA Character||Action||ASCII Equivalent|
| ||Advance to next page (form feed)|| |
|blank||Advance 1 line (single spacing)|| |
| ||Advance 2 lines (double spacing)|| |
| ||Advance 3 lines (triple spacing)|| |
| || Do not advance any lines before printing,|
overstrike the previous line
Overstriking can be used to make boldface text by printing the same line again without advancing the paper. It can also be used to make underlined text by printing a line of underscore characters, followed by a second overstruck line of text.
Mainframe printers also have 12 channels (1 through 9 and A through C) that can be assigned a fixed position on the page, allowing the printer to skip a variable distance down the page to a fixed location. Normally only channel 1 is preassigned a special position.
ASA carriage control characters are still used in printer output from mainframe applications and software today, and is not limited to seasoned software or applications dating from the days of the line printer. ASA carriage control characters are interpreted by other software before being printed on modern computer printers.
Example output containing ASA carriage control characters:
This is the first line on the page This is the third line on the page This is the 6th line on the page
This is the 7th line on the page____ the - Overstrike the 7th line
Example as printed output:
This is the first line on the page
This is the third line on the page
This is the 6th line on the page
This is the 7th line on the page - Overstrike the 7th line