option .10 1 (default) Enable the output suspension facility. option .10 0 disables. Note the period (.) indicating a decimal value, Alt S option .11 1 (default) Enable all special keyboard codes. option .11 0 disables. option .12 1 (default) Enables the output of a beep character when the system prints out an error message. option .12 0 disables. option .13 1 (default) Warm start upon bus or similar exception. option .13 0 is cold start (available from Version 3.1e on, previous default was cold start) Alt option .14 1 (default) Dumps contents of program counter and reg- isters, if the 68000 trace flag is set on.
You set the CPU trace flag in the 68000 status register with or.w #$8000.sr , and clear it using and.w #$7ffff.sr . option .14 0 disables PC and register output. option .15 0 If bit 0 (.15 1) is set, do not create .bak files in edit and Dr Doc . Bit 1 (Alt C interrupt ... broken) If bit 2 is set (.15 4), the key on the numeric keypad generates in non-numeric mode. option .16 .56 Set file creation mode, the default filemode mask. You are setting a bit pattern here. The normal default ensures all files have RWX permissions for all users. This can be altered for greater security when there are multiple users. Probably not available this time round.
option .17 1 Enable lower case pathnames, in directories. 5 Ctrl Q option .18 0 Set output video mode. If bit 0 is set (1), all escape code sequences are ignored. Characters are simply printed out. Remember, we are setting bits, not giving a value. Ifbit 1 isset (2),all control charactersremove their special meaning, even carriage return, line feed, etc. Obviously, if you set both bits 0 and 1 (3), the display goes into a monitor mode, and displays all characters sent to it (showing their ASCII equivalent where required). A ^L clears the screen if bit 2 is clear, and tabs overwrite characters. If bit 2 is set (4), the terminal emulation is closer to Televideo 950 standard.
^L moves cursor forward, while tabs are non-destructive, and move cursor to the next tab stop. 1616/OS Commands User Tutorial Manual Page 89