Philips NMS 800
This page was last modified 21:32, 17 January 2021 by Mars2000you. Based on work by Rderooy and Gdx.



The Philips NMS 800 is a MSX1 computer, bundled with a joystick, data recorder and six tapes with 50 games, aimed at the Italian market. It has the text "MSX Compatible" instead of the MSX logo. The reason for this is likely because the system is not actually MSX compliant due to missing features, such as no cartridge slot or printer connector. We can therefore speak of a hidden MSX!

Text on the systemboard says CELINT(UK) LTD 1989, and some units say Made in Italy. The system is also build without an MSX-Engine. The system is in physical appearance very similar to the Philips Telematico NMS 3000 and 4000, which were Italian Videotel machines.

Contrary to the NMS 801, this model does not have a RF output, what's very uncommon on the MSX system. Early versions of the NMS 800 have the word COMPUTER on the case in white, while later versions had it in color.

There has been speculation that the NMS 800 had just 32kB RAM, but this has been refuted and the manual actually claims 64kB.

The box and computer did not have any label attached with any type indication, instead stickers were supplied with the machine that the user was meant to stick on it (which few obviously ever did). Only the manual indicates NMS 800.

The joystick has NMS 850 written on the bottom, but the data recorder also has no type indication, except for a label that says 'Made in China'.

The box indicates 'Compatible MSX-DOS', but it's just a lie, as it is impossible to add a disk drive to this computer. Another lie is displayed on the MSX-BASIC screen, announcing 'MSX BASIC version 3.0', while this machine is not a MSX2+.

Brand Philips (Manufacturer: Celint)
Type NMS 800
Year 1989
Region Italy
Original price
RAM 64kB in slot 3
Media cassette tapes
Video Texas Instruments TMS9129NL
Audio PSG (AY-3-8910)
Chipset none (separate IC's)
Keyboard layout QWERTY
Extras reset button, joystick, data recorder and 50 games on tape
Emulation Philips NMS 801 is emulated and should be the same. For validation a ROM dump would be needed. See this thread for details


Philips NMS 800
Philips NMS 800 open box
Philips NMS 800 with white logo
Philips NMS 800 manual
Philips NMS 800 PCB
Philips NMS 800 back
Philips NMS 800 box and content
Philips NMS 800 box


The Philips NMS 800 is a MSX1 with a Z80A from SGS (Z8400AB1).

Slot Map

Slot 0 Slot 1 Slot 2 Slot 3
Page C000h~FFFFh 64kB
Page 8000h~BFFFh
Page 4000h~7FFFh Main-ROM
Page 0000h~3FFFh


External Links