Dataman S4 Manual page 67

DATAMAN S4 MANUAL
The algorithm is a 15-bit left-shift with the least
significant bit
being the XOR of previous bits 0 and 14. This
sequence repeats every
32,767 shifts. The lower 8 bits are used. Every
byte will look like
a left shift of the preceding byte, except for the
LSB which is unpredictable.
<$IKEY;ESC edit (system
RAM)>FUNC EDIT = Edit System
Ram<$&FUNCEDIT>
@COMPUTER TEXT = <R>
>><R>
>>EDIT SYSTEM RAM<R>
08A00
<$IEditing;System - The TPA>System memory
space can be seen and altered
using a FUNC version of EDIT. System memory
space is where the working
program is stored when loaded from a LIBRARY
ROM, in the Transient
Program Area which extends from 8000 to FFFF.
If the FUNC key is pressed
from the command prompt, the prompt changes
from a >> to a *. EDIT
then works on system memory. The LCD behaves
exactly as the normal
edit routine.
WARNING *EDIT allows changes to the working
program and system variables.
S4 can be crashed by editing the running program,
if indiscriminate
<$IKEY;ESC edit (system RAM)>FUNC
EDIT = Edit System 67