u2-SX E15 HD - 2nd Generation MSX++ Console

🎬 Watch the Demo Video: u2-SX E15 HD - Official Demo on YouTube

What is it?

u2-SX E15 HDMI using the QMTECH EP4CE15F23 core board and based on SM-X HB Mini.

Unfortunately, QMTECH stopped producing the EP4CE15F23 core board in the first half of 2024. But I solved this problem and designed a compatible core board with the permission of QMTECH, which is the fundamental reason for the continuation of the project.

To improve VGA quality, I have added an external video DAC, and I changed the keyboard layout to US layout, and I also solidified the u2-SX startup logo.

So the firmware is not compatible with SM-X HB.

It is no surprise that Victor is the creator of SM-X, which means all the second-generation 1ChipMSX clones are based on SM-X.

• SX-2 is a partial clone of SM-X.
• SX-Lite is a full clone of SM-X HB Mini.
• SX-E is a combination of SM-X and MiST clones. This is similar to Victor's Multicore 2p.

Why did you make it?

To continue the legacy of the EP4CE15F23-based SM-X HB Mini platform with improved video quality, a custom compatible core board, and enhanced features — making it accessible again after QMTECH discontinued the original core board.

What makes it special?

Compared with first-generation OCM (such as uMSX) and other second-generation OCM hardware, it has the following characteristics:

• VGA + HDMI video output simultaneously. Audio can be output through HDMI and 3.5mm headphone jack at the same time.
• Cassette audio input function.
• Professional independent audio power supply, preamplifier and headphone amplifier chips — true audiophile-grade sound quality. The volume is adjustable.
• Independent video DAC chip eliminates all ripple and bleed.
• Franky firmware is pre-installed and can run a few SMS games.
• PS/2 Mouse Port, USB Keyboard Support.
• Professional 4-layer PCB layout and routing.
• Dual PSG, compatible with MegaFlash ROM SCC+SD standards.
• Midi Port by Joyport2.
• Slot-3 Expansion Bus Port Support.