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Debugger General Information
3
Terminal Input/Output Control
3-12
The 162Bug requires 2KB of NVRAM for storage of board configuration,
communication, and booting parameters. This storage area begins at
$FFFC16F8 and ends at $FFFC1EF7.
The 162Bug also requires a minimum of 64KB of contiguous read/write
memory to operate. The ENV command controls where this block of
memory is located. Regardless of where the onboard RAM is located, the
first 64KB is used for 162Bug stack and static variable space. The rest is
reserved as user space. Whenever the controller is reset, the target PC is
initialized to the address corresponding to the beginning of the user space;
the target stack pointers are initialized to addresses within the user space,
with the target Interrupt Stack Pointer (ISP) set to the top of the user space.
When entering a command at the prompt, the following control codes may
be entered for limited command line editing:
Note
The presence of the caret ( ^ ) symbol before a character
indicates that the Control (CTRL) key must be held down
while striking the character key.
^X
(cancel
line)
^H
(backspace) The cursor is moved back one position. The character
<DEL>
(delete or
rubout)
^D
(redisplay)
^A
(repeat)
The cursor is backspaced to the beginning of the line. If
the terminal port is configured with the hardcopy or
TTY option (refer to PF command), then a carriage
return and line feed is issued along with another
prompt.
at the new cursor position is erased. If the hardcopy
option is selected, a "/" character is typed along with
the deleted character.
Performs the same function as ^H.
The entire command line as entered so far is
redisplayed on the following line.
Repeats the previous line. This happens only at the
command line. The last line entered is redisplayed but
not executed. The cursor is positioned at the end of the
line. You may enter the line as is or you can add more
characters to it. You can edit the line by backspacing
and typing over old characters.
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