Sanyo PHC-28S
This page was last modified 02:45, 18 January 2021 by Mars2000you. Based on work by Rderooy and Gdx.



The Sanyo PHC-28S was aimed at the French market. However the keyboard is QWERTY instead of AZERTY as would be typical for the French market. This model is based on the MPC-5.

Contrary to the Japanese machine, this computer has an expansion bus slot: it can be used as third cartridge slot with an adapter, which was original meant for the MEB-01 slot expander, which in turn can be connected to the MPC-X, a Graphic Expander Unit which adds a MSX2 palette, high-resolution, superimposing, still function and zooming and supports a lightpen. Note however that Sanyo has never released the MPC-X in Europe.

This machine has also been released in France by the German company Olympia as the PHC-28 with an AZERTY keyboard.

Brand Sanyo
Type PHC-28S
Year 1984
Region France
Original price
RAM 16kB in slot 0
Media MSX cartridges
Video Texas Instruments TMS9929ANL
Audio PSG (AY-3-8910)
Chipset none (separate IC's)
Keyboard layout QWERTY with a "£" key
Extras Reset button
Emulation ROM dumped and emulated. The rear expansion port is handled like a regular MSX cartridge slot.


Sanyo PHC-28S box and content
Sanyo PHC-28S
Sanyo PHC-28S back
Sanyo PHC-28S left side
Sanyo PHC-28S right side
Sanyo PHC-28S box
Sanyo PHC-28S label
Sanyo PHC-28S PCB


THe PHC-28S is a MSX1 with a Z80A from Sharp (LH0080A). It was often proposed with a RAM extension of 16kB or 48kB.

Compared to the model MPC-5, a printer port and an expansion bus have been added, the RF output has been replaced by a RGB output.

Slot Map

Slot 0 Slot 1 Slot 2 Slot 3
Page C000h~FFFFh RAM Cartridge
Slot 1
Slot 2
Page 8000h~BFFFh
Page 4000h~7FFFh Main-ROM
Page 0000h~3FFFh