Main architecture

=MVS/AES=




 * Graphic multiplexer not shown
 * Graphic, audio and sound buses for data are separated. 68k can't access data.
 * Only difference with AES is I/O for cab stuff, dipswitches, gfx multiplexer onboard and backup RAM.

=CD=




 * Not sure about GPU organisation, Z80 RAM may be connected directly to Z80 -furrtek
 * LC89515/CD data transfers might be on the 68k bus
 * 68k can upload to DRAM with or without DMA.