On 3 Nov 02, at 15:19, Tony Parker wrote:
BTW, I have noticed that Video Disk Mode accesses "Extended Memory Services". Is "Extended Memory Services" EMS or XMS?
XMS. EMS stands for Expanded Memory Services. Think of extended memory as extending the usually memory out further, e.g, adding the memory beyond 1024K into the memory range linearly. An app using XMS can see and work with the entire range of XMS available to it. Expanded memory doesn't extend the memory address range, it effectively sets up a vertical memory range of 64KB chunks that are made visible within a 64KB chunk of the real mode address space. An app using EMS has to figure out which 64K chunk of the EMS memory it needs, have that chunk mapped into the real mode memory slot set aside of EMS, then work with its data. David gnome@hawaii.rr.com