<What might be fun would be an S-100 card to serve as an interface to a <Monochrome/Hercules equivalent card and an IBM-style keyboard, since these They do exist! Hercules made cards for the s100 machines that ran DOS! <Fire). One of those little switch boxes would serve just fine. The 8.0 MH <Z80 wouldn't be sufficient to drive a VGA, so no need for anything fancy. Why not? I'm currently planning to use ISA16 and herc video for a z280 system. Z280 has a 16 bit bus mode. The only thing needed to support herc using a z80 is a MMU to allow mapping the display out of the address space so that you have room for CP/M. I've done some testing to verify this will work. <It could even support two short ISA cards. More if you buffer the bus! Allison