Toshiba HX-21F
This page was last modified 12:36, 20 December 2021 by Mars2000you. Based on work by Gdx.




The Toshiba HX-21F is the adaptation for France of the HX-21 - see HX-21 series for the technical details

It has a QWERTY keyboard, just like the HX-10F. A specific RGB connector (Peritel) replaces the RF, composite video and audio connectors, but these can probably be added on the video decoder board.

The PSG sound is mono instead of stereo.

An RS-232C interface as like that of the HX-20 can be added if you replace the IC3 ROM by the one from the HX-22CH, HX-22GB or HX-22I.

Note: The computer cardboard box is a generic HX-20 "universal" one. One side of the box shows the Toshiba HX-20 computer and the other side shows the pic of a Toshiba HX-22.


A menu proposing the firmware is launched when you start the computer, but you can skip it if you press ESC key while booting.

Compared to the HX-21:

  • the Memory Disk and RS-232C features have been removed
  • the additional MSX-BASIC instructions for the printer are not implemented
  • the Japanese Word Processor has been replaced by an English Word Processor



Toshiba HX-21F
Toshiba HX-21F main PCB
Toshiba HX-21F detail
Toshiba HX-21F inside
Toshiba HX-21F back
Toshiba HX-21F right side
Toshiba HX-21F boards
HX-21F video decoder PCB
Toshiba HX-21F box (side wih HX-22 picture)
Toshiba HX-21F label
HX-21F video decoder PCB back


Toshiba Intro screen
Toshiba Main menu
Toshiba English Word Processor
Toshiba EWP - Variables Sub-Menu
Toshiba EWP - Screen Variables
Toshiba EWP - Printing Variables