Memotech MTX 512
 
The Memotech company started manufacturing expansion cards and high quality memory modules for the Sinclair ZX 81 home computer.
The British Memotech MTX 512 has a hardware which looks like the Sord M5. It also has characteristics, which are close to the MSX standard, but is not MSX compatible.
It uses a dedicated chip for video (Texas Instrument TM 9918 or 9928) and sound (TI 76489) and has a very nice mechanical keyboard and a nice black aluminum case!
Both models have the same characteristics, but the MTX 500 has only 32 KB RAM and the 512, 64 KB. It had no success and was replaced a short time later by the RS-128.
 
Data Sheet
OS   CP/M
Processor   4 MHz Zilog Z80 A
Sound   3 voices / 6 octaves
RAM   64 KB (up to 512 KB)
Resolution   max: 256 x 192
Color   16 maximum
IO Ports   RGB, Joystick (2), Cardridge, Tape, Audio, Centronics, User Port
Release Date   1983
Language   BASIC, LOGO, NODDY (interactive sequential controller, Z80 Assembler/Disassembler
   
Emulator
Mt. Xemu Release 1 is a good old win32 emulator.  Color, sound, game support - what else could a person want?  If this doesn't float your boat... MTX512 is also supported in MESS.

MESS BIOS File: MTX512

Download Emulator

 

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