last modified $Date: 2001/07/09 20:34:43 $
JFraCE is a framework of interfaces and classes.
The class diagram shows its kernel.
You can click on the interfaces (yellow boxes) and the
classes (green boxes) to get the corresponding JavaDoc description.
The backbone of JFraCE is the
AddressSpace. Eventhough it corresponds to the
hardware bus of a computer system, it is not an emulation of it.
Its main function is to map reading/writing requests
Devices. Such a request comes mainly from
can be any emulation of input/output devices (like keyboards,
terminals, graphic cards etc.) but also memory. Beside of
AddressSpace and an implementation of
interface at least an instance of
RAM is needed for a minimum computer system.
AddressSpace also holds the
may want to interrupt a
can be added or removed from an
AddressSpace. Objects interested in such
reorganizations of the system can implement the
AddressSpaceListener interface and subscribe
is the main class of the framework. It builds and emulates
a computer system. A configuration file tells the emulator how the
computer system has to be built (see
The emulator run the system by executing the
method of the
in a loop.
The emulator can also run inside the
In addition a monitoring GUI
can be attached to the emulator in order to view the
and the position of its program pointer in the
AddressSpace. The user can run the
emulator in single-step mode or slow-motion mode.