| Describes a memory mapping like the 0b111111111110 descriptor, but an entire range rather than a single page is mapped. Another 0b11111111100x descriptor must follow this one to denote the (exclusive) end of the address range to map.
|-
|-
| <code>0b111111111110</code>
| <code>0b111111111110</code>
−
| Mapping IO address
+
| Map memory page
−
| Bits 0-19: IO page index to map; Bit 20: Map read-only (otherwise read-write)
+
| Bits 0-19: page index to map (virtual address >> 12; the physical address is determined per-page according to [[Memory layout]]); Bit 20: Map read-only (otherwise read-write)