Sanyo MPC-25F
This page was last modified 21:19, 13 May 2021 by Mars2000you.



The Sanyo MPC-25 a.k.a. Wavy25 was first shown to the public at the Japan Electronics Show '85 (Oct 17-22).

It is a computer that is a precursor to the Philips NMS 8250, but has less RAM (64kB instead of 128kB) and only one cartridge slot.

This is not surprising, since both companies were working together, what explains the strong resemblances in the design of several MSX2 computers, while targeting different markets (Japan for Sanyo, Europe for Philips).

This machine comes with a separate keyboard.

Four different versions were released. Note that the drive can only format in the mentioned format:

Product VRAM FDD Extra
MPC-25F 64kB 1DD JIS1 Kanji "Macro Word Processor" on disk
MPC-25FD 128kB 2DD JIS1 Kanji "Macro Word Processor" on disk
MPC-25FK 128kB 2DD Address book software, Kanji-ROM Level 1 (JIS1),
connector for second external disk drive
MPC-25FS 128kB 1DD JIS1 Kanji "Macro Word Processor" on disk (?)

The main unit is always in white, the keyboard in gray and the special keys in black, the other keys can be gray or yellow.

While it may appear that there is space for a second internal disk drive, this space cannot be used as such due to the way the video and diskdrive PCB has been placed inside the computer.

Brand Sanyo
Type MPC-25F
Year 1985-12
Region Japan
Original price ¥118,000
RAM 64kB in slot 3-2
Media MSX cartridges, 1DD floppy disks
Video Yamaha V9938
Audio PSG (YM2149 integrated in MSX-Engine S3527)
Chipset Yamaha S3527
Keyboard layout QWERTY/JP50on
Extras 360kB 3,5" floppy disk drive, reset button, JIS1 Kanji "Macro Word Processor" on disk
Emulation ROMs dumped and emulated for the MPC-25FD. For other versions ROM dumps are needed. See this thread for details


Sanyo MPC-25F
Sanyo MPC-25F back
Sanyo MPC-25F right side
Sanyo MPC-25F label
Sanyo MPC-25F inside


The MPC-25F is a MSX2 with a Z80A from NEC (D780C-1) and an MSX-Engine S3527 from Yamaha.

SCREEN 7 and 8 can't be used because the VRAM size is only 64kB.

Slot Map

Slot 0 Slot 1 Slot 2 Slot 3-0 Slot 3-1 Slot 3-2 Slot 3-3
Page C000h~FFFFh Cartridge
Mirror Mirror 64kB
Page 8000h~BFFFh Mirror Mirror
Page 4000h~7FFFh Main-ROM Mirror Disk ROM
Page 0000h~3FFFh Sub-ROM Mirror
  • Sub-ROM is mirrored over other pages in slot 2.
  • The Disk ROM is a 16kB ROM - 4000h-7FFFh. However, the FDC registers are visible on all 4 pages. It's not a full mirror of the ROM.