Category:Toshiba HX-22
This page was last modified 13:11, 21 May 2021 by Mars2000you. Based on work by Rderooy and Gdx.

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
HX-22 JP QWERTY/JIS RF, composite video and stereo audio, RGB RP13A
HX-22CH CH QWERTY with accent key RF, composite video and mono audio, RGB SCART
HX-22GB UK QWERTY with £ key RF, composite video and mono audio, RGB SCART
HX-22I IT QWERTY with accent key RF, composite video and mono audio, RGB SCART


Although it's a MSX1 computer, the Japanese model can use a part of the MSX memory to create a Memory Disk (feature generally reserved for MSX2 and higher computers).

Brand Toshiba
Model HX-22 / HX-22CH / HX-22GB / HX-22I
Year 1984-10-16 (Japan)
1985 (Europe)
Region HX-22: Japan
HX-22GB: United Kingdom
HB-22I: Italy
Launch price IT: L. 599,000
JP: ¥89,800
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)
Keyboard layout see table above
Extras firmware (Japanese Word Processor - Kanji-Kun v.2.0 or English Word Processor), RS-232C interface + switch + RS-232C BASIC, (only Japanese version) MemoryDisk BASIC + Printer BASIC + stereo PSG sound
Emulation ROMs dumped and emulated for the HX-22 and HX-22I versions. ROM dumps needed for the HX-22CH and HX-22GB versions. See this thread for details

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 probably also the other European versions), 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
Page C000h~FFFFh Cartridge
Slot 1
Cartridge
Slot 2
64kB
RAM
Mirror
Page 8000h~BFFFh Firmware
Page 4000h~7FFFh Main-ROM
Page 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 (also probably HX-22CH and HX-22GB)

Slot 0 Slot 1 Slot 2 Slot 3-0 Slot 3-1 Slot 3-2 Slot 3-3
Page C000h~FFFFh Upper
32kB RAM
Cartridge
Slot 1
Cartridge
Slot 2
Mirror
Page 8000h~BFFFh Firmware
Page 4000h~7FFFh Main-ROM Lower
32kB RAM
Page 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 4 pages are in this category, out of 4 total.

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