MB03+ Ultimate is a next-generation, powerfull and compact ZX Spectrum interface that in all-in-one solution brings the functionality of a large number of hardware and system add-ons  for the ZX Spectrum and compatible computers. This modern device can be normally connected to the standard computer´s edge connector. MB03+ is based on modern and fast FPGA and other advanced chips, compatible with it's predecessor MB02+ and also with other popular interfaces such as divMMC and divIDE. The development of the MB03+ took me about 16 month , now I am working on new firmware features and system software improvements.

The MB03+ development is a non-profit and hobby project. I would like to invite you to visit the product website: http://128land.com/ and my the Facebook https://www.facebook.com/mb02plus/ and Twitter https://twitter.com/LMN1282 sites. You can also check out and read more MB03+ related articles, reviews and discussions on the forums https://www.worldofspectrum.org/forums/discussion/57047/mb03-ultimate and http://oldcomp.cz/viewtopic.php?f=39&t=6570&start=45 

Jan Kucera aka LMN128, author of the MB03+

User support available on the Telegram channel: https://t.me/+I6J9b7hdOVdiNjc8

Specifications :

• square shape 10x10cm board, connected to ZX edge socket in horizontal position

• powered by ZX Spectrum - very efficient switch power supply

• FPGA Xilinx Spartan7 - XC7S50 484pins, the main brain of the machine

• 16MBytes SRAM + 4MBytes Fast SRAM + 2MBytes FLASH + FRAM 8KB (system info, bios config); every RAM is expandable through expansion sockets;

• RTC DS3234 - extremely Accurate RealTimeClock with SRAM (a BIOS config storage) - emulation of RTC72421 via FPGA (ports, regs, etc.)

• CompactFlash(IDE) card and 2x microSD cards sockets.

• WiFi ESP8266 - wifi module.

• 2x USB ports, one for user friendly firmware update, second for K-Mouse

• Z80 DMA

• tremendous sound capabilities: 3xAY - TurboSound or TurboSound FM (2xYM2203), SAA1099, SounDrive/Stereo Covox/Specdrum, SID and General Sound.

• Digital video output to TV with audio.

• FADI compliant, fully compatible with all ZX Spectrum models (ZX 128 standard recommended for the best gaming and demoscene experience)

• Ultimate firmware - a quick startup with all basic options, switchable configurations

• expansions sockets

• MB02+, MBIDE and BSDOS308 compatible.

• divSD, divIDE, divMMC and esxDOS (UNODOS) compatible

• compatible with other systems, like Residos in the MB02+ mode 

• Custom ROM loader - DerbyPro e.g.

• ULAplus palette

• TIMEX Hi-Color and Hi-Res graphics modes

• GigaScreen (non flickering), scan line effects

• ZX-Uno's Radastan graphics

• HiResColour and HiResindeXedColour modes

Visions and possibilities for another SW coders and HW designers:

• in cooperation with Miguel - new powerfull esxDOS; with Busysoft - new BSDOS.

• huge capacity and great potential for many hardware and firmware extensions, e.g. large  LED display, even bigger RAM and flashRAM, more joystick ports and also real, old good floppy interfaces (Betadisk, Didaktik D40/D80, Plus D and Disciple, Diskface, Opus, MB02+...) 

Current status:  The last piece is sold.

At least 10 Speccy fans must express their interest to produce a next batch of the MB03+ Ultimate.