Sanyo MPC-2300
This page was last modified 15:40, 5 December 2021 by Gdx. Based on work by Mars2000you 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 used in network with the MPC-2500FD.

The switch probably allows to initialise the serial port. It is unknown to what refers the C8 part added on the label.

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 + CF 7700B
Keyboard layout JCUKEN/Cyrillic
Extras Serial port + switch + terminal software
Emulation ROMs dumped but machine not emulated (firmware ROM needs to be checked deeper)


From MSX-BASIC, the terminal software can be launched with CALL INIT or _INIT.


Sanyo MPC-2300
Sanyo MPC-2300 label
Sanyo MPC-2300
Sanyo MPC-2300 inside
Sanyo MPC-2300 PCB
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.

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