Toshiba HX-R703
This page was last modified 14:45, 13 January 2022 by Mars2000you. Based on work by Gdx and Rderooy.


The Toshiba HX-R703 is a RS-232C interface, designed for the HX-34 computer.

It is the equivalent of the HX-R700 but without ROM. The BIOS 1.0 and RS-232C BASIC is already included in the HX-34 firmware.

The card provides a DB-25 port on which a RS-232C cable can be attached.

Brand Toshiba
Model HX-R703
Year 1985
Region Japan
Launch price ¥18,800
Package content RS-232C card, User's Manual
Emulation Not yet emulated


Toshiba HX-R703