In 1988 Amstrad attempted to make the first affordable portable personal computer with the PPC512 and PPC640.
They ran MS-DOS on an 8 MHz NEC V30 processor, and had one or two internal 720kb 3.5″ Floppy drives. The built-in screen was a non-backlit CGA Monochrome unit that could emulate the Monochrome Display Adapter or Color Graphics Adapter standard. These machines were based on the Sinclair PC200, and the PC1512 rebadged as the Sinclair PC500.
The PPC640 was similar to it’s cheaper brother, the PPC512 except that it had 640Kb RAM and a built-in Modem.