keep old sd_card.sv as image_card.sv
increase read buffer of UART from 16 to 64 bytes allow selection of UART baud rate allow selection of sd controller or image controller update readme.md with more explanation of above and more detail on MultiComp use specifically for CP/M
Add 6502 Basic and 6802 Basic accessible by the OSD MiSTer menu.
Initial Commit of the MuliComp. MuliComp is a port of Grant Searle's MultiComp to the MiSTer
