  We will use EPICS toolkit [1] to build a prototype for upgrading BEPC control
system. The purposes are for the following three aspects: (1) Setup a network
based distributed control system with EPICS. (2) Study some front-end control
technology. (3) Merge the existing control systems into EPICS. The hardware
architecture consists of three physical layers. The front-end layer is VME
crate, PowerPC, VME I/O modules and interface boards (VME-CAMAC and Fieldbus).
The back-end layer is SUN workstation, which is used as application
development. The two layers are connected via the middle layer which is 100M
Ethernet. In order to preserve our investment in the hardware, the existing
CAMAC hardware will remain. The CAMAC will be connected to the VME via CAMAC
serial highway [2]. The operator interface will be developed with EPICS DM2K.
High-level accelerator control applications will be studied as well with EPICS
channel access and archive access.
