#Backspace character for mac using java driver#
#Backspace character for mac using java manual#
#Backspace character for mac using java software#
#Backspace character for mac using java code#

#Backspace character for mac using java code#

EGA/VGA fonts, as fonts used by Win32 console, usually have the 'house' symbol ⌂ at 127 (0x7F) code point, see Code page 437 for details. In Windows the delete key maps to VK_DELETE (0x2E).

#Backspace character for mac using java driver#

The BIOS keyboard driver produced Backspace when the backspace key was typed and NUL with scan code 0x53 when the delete key was typed. Most Unix terminal emulators can be configured to send either Delete or Backspace when the backspace key is pressed.ĭOS/ Windows never used this character in any way. However, most modern programs bypass this and use libraries such as readline which accepts both codes.

The terminal driver still cannot be programmed to take both this and Backspace: one must be chosen. Unix-like operating systems can still use it as the erase character, i.e., to delete the previous character in the line mode. To make sure they don't delete backwards, the key marked 'Delete' on many terminals does not send DEL and instead sends an escape sequence such as ^ Current use

#Backspace character for mac using java software#

Depending on the type of terminal the designer used, software would sometimes make the shortcuts Ctrl+ H or Ctrl+ ? do something, even though these sent the same code as BS and DEL, assuming the backspace key was sending the other code.Ī key marked Backspace ← that sends BS is by far the most common on modern terminals and emulators.

Unix, in particular, had an annoying problem that in it could only be programmed to erase the previous character for one of these (not both), thus requiring the user to reconfigure the terminal driver for each brand of terminal. Other terminals designed for systems that did not have a history of using Teletypes would usually make a key at this position send BS, leading to much confusion.

#Backspace character for mac using java manual#

On later terminals, such as the VT510, the key is labeled ⌫ (called backarrow in the manual ) and by default sent DEL, but could be set up to send BS. On VT100 compatible terminals, this is the character generated by the key labeled Delete. Video terminals designed to replace the teletype then had to place a key that produced this code where Backspace would be expected, in particular in products from Digital Equipment Corporation. Therefore, a number of less-expensive computer systems that used Teletypes used this key (and thus the Delete code) to ignore the previous mis-typed character. The Teletype Model 33 provided a key labelled RUB OUT to punch this character (after the user backed up the tape using another button), and did not provide a key that produced the Backspace character (BS). This character could also be used as padding to slow down printing after newlines, though the all-zero NUL was more often used. In hexadecimal, this is 7F to rub out 7 bits ( FF to rubout 8 bits was used for 8-bit codes).

If a character was punched erroneously, punching out all seven bits caused this position to be ignored or deleted. This code was originally used to mark deleted characters on punched tape, since any character could be changed to all ones by punching holes everywhere. 'Delete' along with some other ASCII control characters and space as they appear on punched tape