[7] The PPC640 was otherwise identical except that it had 640 KiB of memory, a built-in 2400 baud modem (unusually fast for its day), and its case was a darker shade of grey.

Both versions of the machine had an empty socket on the main circuit board so that an Intel 8087 coprocessor could be installed to permit hardware processing of floating point arithmetic.

A bank of six DIP switches was used to select whether the video hardware emulated CGA or MDA, and whether to use an internal or external monitor.

MS-DOS 3.3 was supplied with all PPCs, along with PPC Organiser – a memory-resident suite of utilities including a card file, diary, calculator and telephone dialler.

In late 1988 Amstrad created a desktop computer based on the PPC design, intended for the home market.