Sanyo MPC-25
This page was last modified 04:16, 24 April 2019 by Mars2000you. Based on work by Gdx and Rderooy and others.

Contents

Description

The Sanyo MPC-25 a.k.a. Wavy25 is a computer that is very similar 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 and in 4 different versions:

Product Region Release Price VRAM FDD Extra
MPC-25FS JP 1985 (?) 128kB 1DD JIS1 Kanji "Macro Word Processor" on disk (?)
MPC-25F JP 1985-12 ¥118,000 64kB 1DD JIS1 Kanji "Macro Word Processor" on disk
MPC-25FD JP 1985-12 ¥135,000 128kB 2DD JIS1 Kanji "Macro Word Processor" on disk
MPC-25FK JP 1986-07 ¥125,000 128kB 2DD Address book software, Kanji-ROM Level 1 (JIS1),
connector for second external disk drive


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, diskdrive (and kanji) PCB has been placed inside the computer. However, the MPC-25FK model has a connector for a second external diskdrive.

The MPC-25FD has been localised for

Brand Sanyo
Type MPC-25
Year 1985~1986
Region Japan
Original price See table above
RAM 64kB in slot 3-2
VRAM 64kB (MPC-25F) or 128kB (other models)
Media MSX cartridges, 1DD floppy disks, (on FD and FK versions) 2DD floppy disks
Video Yamaha V9938
Audio PSG (YM2149 integrated in MSX-Engine S3527)
Chipset Yamaha S3527
Extras 360 or 720kB 3,5" floppy disk drive,
(only MPC-25F, MPC-25FD and maybe MPC-25FS) JIS1 Kanji "Macro Word Processor" on disk,
(only MPC-25FK) Kanji-ROM Level 1 (JIS1) and Address book software

Pictures

Model MPC-25FS

Sanyo MPC-25FS
Sanyo MPC-25FS back
Sanyo MPC-25FS
Sanyo MPC-25FS box
Sanyo MPC-25FS
Keyboard comparison: Philips NMS 8250/55/80 and Sanyo MPC-25/27
Sanyo MPC-25FS mainboard
Sanyo MPC-25FS inside

Model MPC-25FK

Sanyo MPC-25FK
Sanyo MPC-25FK back
Sanyo MPC-25FK

Specifications

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

On the MPC-25F version, 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
Slot
Mirror Mirror 64kB
RAM
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.

Connections

External links