Intermec PENKEY 6100 Programmer's Reference Manual page 246

Reference, System Information
ROM DOS 5
shadow RAM
SHELL=A:\COMMAND.COM A:\ /P
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R
7-2 PEN*KEY 6100 Computer Programmer's Reference Guide
SHELL=D:\COMMAND.COM /P D:\
DOS=HIGH
DOS=HIGH
DOS=UMB
DOS=UMB
SECTION 7