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 UK: £149,99 |
| 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!
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
- RF output (with channel selector switch on Japanese version)
- RGB output RP13A connector or SCART connector
- Analog sound (stereo on Japanese version with Stereo/Mono switch) & Composite video
- RS-232C connector (DB-25) with ON/OFF switch
- Data Recorder connector
- Centronics compatible Parallel port for a printer
- 2 general connectors (Joysticks, Mouse, Paddle controlers, etc)
- 2 cartridge slots
- AC Power plug male
- Ground terminal (European versions only)
External links
- Blog post about the HX-22 (Korean)
Pages in category "Toshiba HX-22"
The following 4 pages are in this category, out of 4 total.