LR33020 GraphX (LR33K) is a processor designed for X-Terminal systems by LSI Logic. It features:
- R3000 CPU core
- Integrated caches
- Write buffers
- Memory controllers
- Dedicated 2D graphics hardware as COP2. (PS/2 port too)
- 64-bit data path
Other built in hardware include:
- BitBlt coprocessor
- DMA channels,
- Video FIFO
- PS/2 ports
- Support for ethernet.
- It supports mono, 2-bit and 4-bit grayscale and 8-, 16- and 32-bit color.
The processor has probably no MMU or FPU.
The original LSI's PMON firmware contains some support for this CPU. The lr33020.h header file looks interesting.