UM8031 Key Features
- 4K x BROM
- 128 x 8 RAM
- Four 8-bit ports, 32 I/O lines
- Two 16-bit timer/event counters
- High-performance full-duplex serial channel
- External memory expandable to 128K
- Boolean processor
- Non-paged jumps
- Direct addressing
- Four 8-register banks