UMC Green CPU
A UMC U5SD microprocessor rated for 40 MHz motherboards. | |
| General information | |
|---|---|
| Launched | ca. 1990s |
| Common manufacturer | |
| Performance | |
| Max. CPU clock rate | 25 MHz to 40 MHz |
| Data width | 32 bits |
| Address width | 32 bits |
| Virtual address width | 32 bits (linear); 46 bits (logical) |
| Architecture and classification | |
| Technology node | 0.6 μm to 0.35 μm |
| Instruction set | x86-16, IA-32 including x87 (except for U5SD) |
| Physical specifications | |
| Package | |
The UMC Green CPU was an x86-compatible microprocessor produced by UMC, a Taiwanese semiconductor company, in the early- to mid-1990s. It was offered as an alternative to the Intel 80486 with which it was pin compatible, enabling it to be installed in most 80486 motherboards. All models had power management features intended to reduce electricity consumption.