Epson PX-8 Notebook Computer
The Epson PX-8 a.k.a. Geneva was a small laptop computer made by the Epson Corporation in the mid-1980s.
It had a Z80 compatible microprocessor, and ran a customized version of the CP/M-80 operating system as well as various applications from a pair of ROM cartridge slots which were treated as drives. For file storage, it had a built-in microcassette drive.
The PX-8 did not have any internal disk drive, and instead allowed either memory to be partitioned into application memory and a RAM disk, or an external 60 KB or 120 KB intelligent RAM disk module to be attached (64K and 128K internally but some used for the processor). The intelligent RAM disk module had its own Z80 processor with a backup battery.
The PX-8 had an 80 column by 8 line LCD display, which was monochromatic and non-backlit. It used an internal nickel-cadmium battery, and had a battery life in the range of 6–8 hours when using word-processing software. An additional battery provided backup for the internal RAM.