Sony XV-J770
This page was last modified 01:58, 26 June 2021 by Gdx. Based on work by Mars2000you and Rderooy.



The Sony XV-J770 is a video titler appliance, aimed at the Japanese market. The system is basically an MSX2, but without the MSX logo. It is very similar to the XV-J777.

The system is only meant to run the integrated video titler software, and as such does not have a Data Recorder, Floppy drive or MSX cartridge slot. As such to run MSX programs on it, other then the integrated software there are a few barriers to overcome.

This system appears to have been made by Mitsumi, the label on the back of the case says Mitsumi and so does the PCB. Despite this, all the ROMs are from SONY, most of them from the HB-F1XD.

Brand Sony (manufacturer: Mitsumi?)
Type XV-J770
Year  ?
Region Japan
Original price
RAM 64kB
VRAM 128kB
Video Yamaha V9938
Audio PSG
Chipset Yamaha S1985
Keyboard layout specific keypad
Extras Kanji-ROM, 16kB SRAM, IC memory card slot, Superimposer, Mouse (Sony MOS-1), special keyboard
Emulation ROMs dumped, but not yet emulated


Sony XV-J770 - Overview
Sony XV-J770
Sony XV-J770 - back
Sony XV-J770 - label with Mitsumi mentioned


Software side, this machine has MSX-BASIC 2.0


  • Keyboard connector
  • One Joystick (DB-9 male), meant for the mouse
  • IC Memory card slot
  • One GPI (General Purpose Interface) port
  • One set of RCA Video/Audio + S-Video output connectors on the rear
  • One set of RCA Video/Audio + S-Video input connectors on the front
  • Two sets of RCA Video/Audio + S-Video input connectors on the rear
  • power cable
  • Power outlet

Note: No Data recorder connector or MSX cartridge slot!

External Links