On Sat, 17 Apr 2004, James Dessart wrote: > In RS-DOSalikes, how does one detect the presence of extra RAM? Is it > using the INIT1 register at 0xFF91? > > James > In Ext. ADOS-3, it is done by swapping in a segment of the extra RAM, changing a byte in it, and seeing if that change ghosts elsewhere or not. Art