The Epson QX-10 is a microcomputer running CP/M or TPM-III (CP/M-80 compatible) which was introduced in 1983. It was based on a Zilog Z80 microprocessor, running at 4 MHz, provided up to 256 KB of RAM organized in four switchable banks, and included a separate graphics processor chip (µPD7220) manufactured by NEC to provide advanced graphics capabilities. In the USA and Canada, two versions were launched; a basic CP/M configuration with 64 KB RAM and the HASCI configuration with 256 KB RAM and the special HASCI keyboard to be used with the bundled application suite, called Valdocs. TPM-III was used for Valdocs and some copy protected programs like Logo Professor. The European and Japanese versions were CP/M configurations with 256 KB RAM and a graphical Basic interpreter. The machine had internal extension slots, which could be used for extra serial ports, network cards or third party extensions like an Intel 8088 processor, adding MS-DOS compatibility. Rising Star Industries was the primary American software vendor for the HASCI QX series. Their product line included the TPM-II and III operating system, Valdocs, a robust BASIC language implementation, a graphics API library used by a variety of products which initially supported line drawing and fill functions and was later extended to support the QX-16 color boards, Z80 assembler, and low level Zapple machine code monitor which could be invoked from DIP switch setting on the rear of the machine. QX-11 The "Abacus" is a IBM PC compatible machine released in 1985 booting MS-DOS 2.11 from 64 KB ROM. It has a Intel 8086-2 CPU at 8 MHz, 128 to 512 KB of RAM and two 3½" floppy drives (360 KB format). The sound chip has 3 sound tones plus one noise channel with 16 independent volume levels, graphics are 640x400 and the joystick ports are Atari-2600 compatible. The was also support for custom ROM cartridges. QX-16 Its successor, the dual-processor QX-16, added a 16-bit Intel processor with Color Graphics Adapter enabling it to also boot MS-DOS 2.11. The case of the QX-16 was enlarged to provide enough physical space for an internal hard-drive in contrast to the QX-10's dual-floppy configuration. Valdocs VALuable DOCumentS by Rising Star Industries is a pseudo-GUI WYSIWYG integrated software/OS for document creation and management, written as a set of interactive application and system modules which ran only on Epson's QX-10 and QX-16 computers. A version designed to run on