Sanyo PHC-28

The Sanyo PHC-28 expanded the company’s pre-MSX home-computer family with more memory, colour graphics and improved peripheral support.

It shows Sanyo’s transition from proprietary designs toward the shared MSX architecture introduced soon afterward.

Notable Features

• 64 KB class memory configuration
• Colour graphics and sound
• Cassette and expansion interfaces

Historical Significance

• It shows Sanyo’s transition from proprietary designs toward the shared MSX architecture introduced soon afterward.

Collector’s Notes

• Software, manuals and regional variants are scarce; confirm RAM and video standard from the model label.
• Memory, storage, displays and expansion hardware should be documented because configurations often changed during a system’s working life.

Specifications

Technical Information
Name	Sanyo PHC-28
Manufacturer	Sanyo
Launched	Saturday, January 1, 1983
Country	Japan
CPU	Zilog Z80A
Units Sold
Form Factor	Keyboard console
Power	External power supply
Networking	None
Operating System	Microsoft BASIC
Expansion / I/O	Cassette, joystick, printer, expansion and display outputs
Keyboard	Integrated keyboard
Storage	Cassette; optional floppy disk
Sound	Programmable sound generator
Colours	8
Graphics	Colour bitmap and character graphics
Display	Television or monitor
ROM	BASIC and system ROM
RAM	64 KB
CPU Speed	4 MHz