.\" SCCSID: @(#)mem.4	8.1	9/11/90.\" SCCSID: @(#)mem.4	8.1	9/11/90.TH mem 4.SH Namemem \- physical main memory image.SH Description.NXR "physical main memory image".NXR "mem memory file"The.PN memis a character special file that is an image of the physical main memoryof the computer.It can be used, for example, to examine(and even to patch) the running system..PPByte addresses in.PN memare interpreted as physical memory addresses.References to nonexistent locations cause errors to be returned..PPExamining and patching device registers is likelyto lead to unexpected results when read-only or write-onlybits are present..SH RestrictionsThe.PN memmemory file is accessed one byteat a time. This may be inappropriate for somedevice registers..SH Files.PN /dev/mem.SH See AlsoMAKEDEV(8)