Description

The HX-51 computer, also known as the HX-51I, has been designed as a very simple MSX1 computer, in a white case.

This model was aimed at the Italian and Spanish markets, but the keyboard is "international". This computer seems to be the 'remake' of the HX-30, with an obvious difference : the original case is black, while the HX-51 case is white.

Pictures

Toshiba HX-51 manuals

Toshiba HX-51 box

Toshiba HX-51

Toshiba HX-51 label

Toshiba HX-51 PCB

Toshiba HX-51 left side

Toshiba HX-51 right side

Toshiba HX-51 back

Specifications

The HX-51 is a MSX1 computer with 2 cartridge slots (one at the top, one at the back). All the main components (Z80A, VDP, PSG) are integrated in a MSX-Engine, the Toshiba T7937. It's actually the first time that such integration happens on MSX.

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

The integrated VDP is the Toshiba T6950, which does not support some undocumented features of the Texas Instruments TMS9918, TMS9928 and TMS9929 VDP's.

The 64kB RAM is split between slots 0 and 3, 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

Connections

• RF output
• Data Recorder connector
• Centronics compatible Parallel port for a printer
• 2 general connectors (Joysticks, Mouse, Graphic pad, Paddle controlers, etc)
• 2 MSX cartridge slots

Links

• Toshiba HX-51 schematic made by reverse engineering