May 23, 2021 DOS Command learning manual
/c shows the occupancy of all memory resident programs, divided into normal memory and uppermemory
High-end memory footprint and display of total occupancy (general high-end reserved extended memory)
/p Pap display, inter-page pause
/m plus module name such as:/m msdos shows the footprint of dos system memory.
/d A detailed example table of general high-end reserved extended memory
Through analysis, you can see whether the memory footprint is reasonable, and whether the various programs load properly, thus on this base
Using memory optimization tool memmaker for a variety of management, while at the same time analyzing some program crashes
The reason, if some places show "???", it can be concluded that there is a virus in memory, conducive to the discovery and elimination.