Category:Toshiba HX-22
This page was last modified 11:38, 26 March 2018 by Rderooy. Based on work by Gdx and Mars2000you.

Contents

Description

The HX-22 is an improved version of the HX-21 computer as it comes with a built-in RS-232C interface with switch. The following models exist:

Product Region Keyboard Video and audio out
Toshiba HX-22 JP Japanese QWERTY RF, composite video and stereo audio, RGB RP13A
Toshiba HX-22GB UK QWERTY with £ key RF, composite video and mono audio, RGB SCART
Toshiba HX-22I IT QWERTY with accent key RF, composite video and mono audio, RGB SCART


Brand Toshiba
Type HX-22 / HX-22GB / HX-22I
Year 1985
RAM 64kB in slot 3-0 (HX-22) or split between slots 0 and 3-0 (checked on HX-22I)
VRAM 16kB
Media MSX cartridges
Video Texas Instruments TMS9928A or TMS9929A
Audio PSG (AY-3-8910A)
Chipset Toshiba TCX-1010 in HX-22, Toshiba TCX-1012 in HX-22I (and probably HX-22GB)
Extras firmware (Japanese Word Processor or English Word Processor), RS-232C interface + switch + RS-232C BASIC, (only Japanese version) MemoryDisk BASIC + Printer BASIC + stereo PSG sound

Pictures

Check also the pages about the different models!

Toshiba HX-22
Toshiba HX-22 back
Toshiba HX-22 PCB
Toshiba HX-22I
Toshiba HX-22I back
Toshiba HX-22I PCB
Toshiba HX-22GB
Toshiba HX-22GB back

Specifications

The HX-22 is a MSX1 with 2 cartridge slots (one at the top, one at the back) and a a Z80A from Sharp (LH-0080A).

The 2 joystick ports are located on the right side of the computer, as well as the data recorder connector.

In the HX-22I (and maybe the HX-22GB), the 64kB RAM is split in half between the slots 0 and 3-0, a configuration that can cause poorly written software to crash. Also, with this layout, the POKE-1,(15-PEEK(-1)\16)*17 trick to workaround buggy software that does not handle subslots properly will not work on this machine.

Slot Map on HX-22

Slot 0 Slot 1 Slot 2 Slot 3-0 Slot 3-1 Slot 3-2 Slot 3-3
Bank C000h~FFFFh Cartridge
Slot 1
Cartridge
Slot 2
64kB
RAM
Mirror
Bank 8000h~BFFFh Firmware
Bank 4000h~7FFFh Main-ROM
Bank 0000h~3FFFh Mirror
  • The Firmware ROM is a 32kB ROM - 4000h-BFFFh, which is mirrored (4000h-7FFFh is mirrored to C000h-FFFFh and 8000h-BFFFh is mirrored to 0000h-3FFFh)

Slot Map on HX-22I (and probably HX-22GB)

Slot 0 Slot 1 Slot 2 Slot 3-0 Slot 3-1 Slot 3-2 Slot 3-3
Bank C000h~FFFFh RAM Cartridge
Slot 1
Cartridge
Slot 2
Mirror
Bank 8000h~BFFFh Firmware
Bank 4000h~7FFFh Main-ROM RAM
Bank 0000h~3FFFh Mirror
  • The Firmware ROM is a 32kB ROM - 4000h-BFFFh, which is mirrored (4000h-7FFFh is mirrored to C000h-FFFFh and 8000h-BFFFh is mirrored to 0000h-3FFFh)

Connections

External links

Pages in category "Toshiba HX-22"

The following 3 pages are in this category, out of 3 total.

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