Takayama Fumihiko has updated DCGNUboy, here’s a list of changes since & the emu’s status:

• new sound emulation unit.
• frameskip (auto, x1.5, x2, x4)
• support screen adjustment.

status

Implemented

• emulate GB/GBC with sound.
  
• smooth sound with GBC.
  
• save/load support.
  
• quick state save/load support.
  
• VMU state save/load support.
  
• frameskip.
  
• screen adjustment.
  
• stable.

Not yet

• playable speed on later GBC games.
• source code cleanup.

You can grab the latest 1st_read.bin from tekezo’s DCGNUboy page. DJ & Nero images will be uploaded shortly.

Thanks to zemus for the news.