Chipsets and Applications
The original Saturn CPU gave its name to the entire architecture. Later chips had their own code names:
CPU codename | Used in calculator models | Properties |
---|---|---|
Saturn | HP-71B, HP-18C, HP-28C | 640 kHz |
Bert | HP-10B, HP-20S, HP-21S | 640 kHz, 10 KB ROM, 256 Bytes RAM, LCD driver |
Sacajawea | HP-14B, HP-22S, HP-32S, HP-32SII | 640 kHz, 16 KB ROM, 512 Bytes RAM, LCD driver |
Lewis | HP-17B, HP-19B, HP-27S, HP-28S, HP-42S | 1 MHz, 64 KB ROM, LCD driver, memory controller, IR control |
Clarke | HP-48SX, HP-48S | 2 MHz, LCD controller, memory controller, UART and IR control |
Yorke | HP-48GX, HP-48G, HP-38G, HP-39G, HP-49G | 3.68 MHz, LCD controller, memory controller, UART and IR control |
The CPU codenames are inspired by members of the Lewis and Clark Expedition of 1804–1806, the first United States overland expedition to the Pacific coast and back.
Read more about this topic: HP Saturn (microprocessor)