RE: Memory Implications of the PPC-210
2005-04-09 by Graham Pearson
Brian:
The PPC-210 increases the amount of memory
available for each of your user algorithms. With the PPC-210, you can
build more complex user algorithms that utilize both SDISC-1 (on the 2101's
motherboard) and SDISC-2 (on the PPC-210's board).
However, the amount of space available for
storing your user algorithms from one session to the next is not increased
with the addition of the PPC-210. You can think of the 2101 as having 2
kinds of memory.
The first is equivalent to the random access memory
(RAM) in your computer and is used only for the "current operation", i.e.
editing a user algorithm, loading and using the current program, editing
parameters for the current program, etc. It is this memory that is
increased when a PPC-210 is installed. Also, you cannot save anything in
this memory from one session to the next. When you power off, this memory
goes brain dead.
The second is equivalent to your hard drive on your
computer and is used for saving your user algorithms and programs from one
session to the next. This memory is the same no matter whether a PPC-210
is installed or not. This memory does not go brain dead when you power
off. There's a battery on your 2101's motherboard that keeps this memory
from one session to the next.
The bottom line is this. With a PPC-210 you
can create more complex user algorithms but typically you'll be able to save
fewer of them.
Wouldn't it be great if we could add hard drives to
our 2101? Perhaps this is a project for our 2101 hardware guru,
Dieter. Dieter, are you listening?
Best Regards,
Graham