🚀 go-pugleaf

My wife and I recently have put together a PC-386/33 with SVGA, 8MB
memory and 162MB (formated) HD disk space. We load the bear system
with MS-DOS 5.0. The problem is this: once we loaded the DOS
(and nothing else) and used
    mem /c | more 
to check out the memory status, there would be two COMMAND file copies
located in the conventional memory. There two copies were of different sizes. 
As we understood, we only need one COMMAND file copy being loaded into
the memory. We don't know how did the second copy come into the memory.  

The second problem is that once we load the DOS, it would fail if we
try to switch to drive A (or B) in the case that there is no formated
flopy diskett in the drive. 
In some cases after responde to the
  "Abort, Retry or Fail", we would get the following message (in big font):

  NO ROM BASICS
  SYSTEM HALTED

Once this occurs we have to reset the machine.
As we understood, even if the A drive (or B drive) had no diskett in,
typping A: followed by RETURN should still bring us to the DOS prompt
A:\>.

 We thank for any advice in regard to correcting these two problems.
 Please forward your advices to xchen@caip.rutgers.edu.

 Thanks.

 -Chen