Intermec PENKEY 6100 Programmer's Reference Manual page 293

APPENDIX B Common PEN*KEY 6000 Series Information
Standard PC Memory Overview
Extended memory
High Memory Area (HMA)
64k
Upper Memory Area
(UMA) 384k
1 Megabyte
Conventional memory
640k
Figure B 1
Typical Memory Organization
Definition of Terms
Conventional Memory
UMA
R
PEN*KEY 6100 Computer Programmer's Reference Guide B-13