Is the Game Boy Advance slot on the DS region-locked?

Dual-slot mode is a method of communication between a Nintendo DS game card and a Game Boy Advance game cartridge by

GameBoy Advance卡帶插槽立體聲耳機麥克風無線通訊功能 CPU 上螢幕內建背光功能解析度192 X 256 點距 26萬色下螢幕 3吋 TFT彩色

duit123 slot GameBoy Advance卡帶插槽立體聲耳機麥克風無線通訊功能 CPU 上螢幕內建背光功能解析度192 X 256 點距 26萬色下螢幕 3吋 TFT彩色

collapsed castle slot I'm looking at bitbanging the GBC cartridge slot with a 40MHZ PIC18 Is there a timing diagram that shows over what interval the LR35902