Toshiba HX-33
This page was last modified 02:00, 20 August 2019 by Mars2000you. Based on work by Rderooy and Manuel and others.

Contents

Description

Computer

The HX-33 is the first MSX2 computer in the third serie with the "Pasopia IQ" label. The PSG sound output is stereo, with a switch at the back. This computer was aimed at the Japanese market, with as option a RS-232C interface with switch.

Brand Toshiba
Type HX-33
Year 1985
Region Japan
Original price ¥99,800
RAM 64kB in slot 3-0, 2kB SRAM
VRAM 128kB
Media MSX cartridges
Video Yamaha V9938
Audio PSG (YM2149F)
Chipset Toshiba TCX-2001 and TCX-2002
Extras firmware (Japanese + English Word Processor), Kanji-ROM level 1, stereo PSG sound, Printer BASIC, (optional) RS-232C interface + switch + RS-232C BASIC

Firmware

The built-in firmware is a Word Processor in 2 versions: Japanese and English. From BASIC, the Japanese version can be launched with CALL JWP or _JWP and the English version with CALL EWP or _EWP. It includes the additional BASIC commands for RS-232C and printer.

The Japanese Word Processor is actually version 3.0 of the same software available in versions 2.0 and 2.5 on the Toshiba HX-2x serie.

The English Word Processor is the same as on the International versions of the HX-20 and HX-22 machines, but the option to leave the program has been removed. As it was already the case with the Japanese Word Processor, you need to reboot the computer.

Pictures

Computer

Toshiba HX-33
Toshiba HX-33 back
Toshiba HX-33 main PCB
Toshiba HX-33 box

Firmware

Toshiba Japanese Word Processor 3.0 - Intro screen
Toshiba Japanese Word Processor 3.0 - Menu
Toshiba English Word Processor - Menu on HX33/34

Specifications

The HX-33 is a MSX2 with 2 cartridge slots (one at the top, one at the back), a Z80A from Sharp (LH-0080A) and 2 unusual MSX-Engines, the Toshiba TCX-2001 and TCX-2002. The 2 joystick ports are located on the right side of the computer, as well as the data recorder connector.

Slot Map

(note: the mapper of the firmware ROM in slot 3-3 needs to be checked)

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
Firmware
Page 8000h~BFFFh
Page 4000h~7FFFh Main-ROM
Page 0000h~3FFFh Sub-ROM
  • The firmware ROM is actually a 80kB ROM

Connections