Sanyo MPC-2300
This page was last modified 15:46, 26 May 2023 by Mars2000you. Based on work by Gdx and Msxholder and others.




The Sanyo MPC-2300 is the adaptation of the PHC-23J computer, also known as the Wavy 23, for the Soviet Union. It was not sold in shops and could only be used in some schools or administrations.

This computer has a Russian keyboard and a non-standard modem with switch (CALL COMINI does not work). It was mainly used by students in network with the MPC-2500FD.

The switch probably allows to initialise the serial port.

It is unsure to what refers the C8 part added on the label, maybe it means "Class 8" and would be similar to the system on the Yamaha YIS-503IIIR and Yamaha YIS-805/128R2 computers: in the Yamaha MSX-Network, up to 8 student machines are connected to a teacher machine using one of the floppy disk drives for centralised file storage.

Brand Sanyo
Model MPC-2300
Year 1987
Region USSR
Launch price
RAM 128kB (? in slot 3-2)
VRAM 128kB
Media MSX cartridges
Video Yamaha V9938
Audio PSG (YM2149 integrated in MSX-Engine S1985)
Chipset Yamaha S1985 + Sanyo CF77099AFT
Keyboard layout JCUKEN/Cyrillic
Extras Serial port + switch + terminal software
Emulation ROMs dumped but machine not emulated (firmware ROM needs to be checked deeper)


The firmware is a communication terminal software that can be launched from MSX-BASIC with CALL INIT or _INIT.


Sanyo MPC-2300
Sanyo MPC-2300 label
Sanyo MPC-2300
Sanyo MPC-2300 chipsets
Sanyo MPC-2300 PCB
Sanyo MPC-2300 PCB underside
Sanyo MPC-2300 inside
Sanyo MPC-2300 back
Sanyo MPC-2300 right side


The MPC-2300 is a MSX2 with a Z80A from NEC (D780C-1) and an MSX-Engine S1985 from Yamaha.

The serial port can communicate up to 18600 bps.

Slot Map

Help needed
The below slot-map is an assumption, it needs to be checked on a real machine.
Slot 0 Slot 1 Slot 2 Slot 3-0 Slot 3-1 Slot 3-2 Slot 3-3
Page C000h~FFFFh Cartridge
Slot 1
Slot 2
Page 8000h~BFFFh
Page 4000h~7FFFh Main-ROM Firmware
Page 0000h~3FFFh Sub-ROM
  • The firmware ROM is a 8kB ROM - 4000h-5FFFh for the LAN.