if there is no output typing, by the following sequence: depressing and releasing "code delete" (a lever above the keyboard), followed by a carriage return. If there is output typing, instead the red button on the control box in front of the keyboard must be depressed once. At present these consoles are only implemented for a single break character of carriage return.
| 12-bit mode | |
|---|---|
| input to the user program | In the columns for the appropriate console, the keys with the characters or control functions indicated, when depressed, generate a logical case and 6-bit code as a single 12-bit code. A keystroke causes no CTSS control action, with the exception of a break character or quit signal. In the case of the quit signal, no code is transmitted to the program. |
| output from the user program | The character or control function corresponding to the logical case and 6-bit code in the columns under the appropriate console is typed out. If there is no character shown for the code, nothing types out. |
| 6-bit mode | |
| input to the user program | In either of the columns for the appropriate console, depression of a key with an indicated character or control function produces the corresponding 6-bit input code; if a character or control function is enclosed in parentheses the character is ignored and no input code is produced. In the case of the delete-character (d.c.), delete-message (d.m.) and quit signals, no code is transmitted to the user's program and instead the appropriate control action is taken. All other characters or control function codes are transmitted to the user's program. (The end-of-command character (e.o.c.) is generated by CTSS as a terminal flag to mark the end of the command |
