Here is a brief summary of the main basic features and functions the MB03+ currently provides:
Slots and connectors
CompactFlash(IDE) card slot
2x microSD card slots
USB port for PC connection and user-friendly firmware update
second USB connector for PC Mouse (K-Mouse emulation)
Display Port/HDMI video output
Stereo jack output
Buttons
Reset
Extra
NMI
Memory chips
4MBytes Fast SRAM
2MBytes FLASH
FRAM 8KB
all RAMs are expandable through expansion sockets
Memory layouts
MB02+ memory layout
divMMC memory layout
MB03+ and Ultimate memory layout
paging per 8K
ROM out + allram mode with memory write protection
Special chips and circuity
RTC DS3234 - Real Time Clock with SRAM
optional WiFi ESP8266 module
LED display
internal expansions sockets
FPGA implemented - mass storage interfaces
DivIDE
DivMMC
MBIDE
FPGA
implemented - video and graphics capabilities
FPGA implemented - sound interfaces
3xAY sound chip, incl. TurboSound
SAA1099 sound chip
Soundrive/Czech DA/Stereo Covox/Specdrum
General Sound
ULA sound (beeper)
FPGA implemented - special interfaces
legacy Real Time Clock - RTC72421
Z80-DMA (data storage and memory transfers accelerator)
K-Mouse (3 buttons)
LCU – HW calculator and LED display controller
Firmware
Ultimate firmware - a quick startup with options, switchable configurations
bios config storage in SRAM
BSDOS flashed and ready to run
ESXDOS for DivIDE flashed and ready to run
ESXDOS for DivMMC flashed and ready to run
TRDOS emulated via ESXDOS
ready to flash other systems: UnoDOS, +divide, ResiDOS and MDOS3
PC FAT-formatted media and PC-emulation file-formats supported in ESXDOS