Types Of Memory Used In The Reader - Intermec Janus 2020 User Manual

Types of Memory Used in the Reader

The JANUS reader uses the types of memory described in this section. Memory
in the reader is similar to that of a PC in some ways, and very different in other
ways. One major difference is that the reader uses memory to simulate disk
drives. This memory map shows how the reader uses memory.
0E0000 - 0FFFFF BIOS and BIOS extensions
00500 - 005FF (256 bytes) DOS and Basic use
00300 - 003FF (256 bytes) BIOS stack/user vectors
001E0 - 002FF (256 bytes) User vectors
00000 - 001DF (480 bytes) Interrupt vectors
000000 Beginning of conventional memory
15FFFF End of extended memory
Drive E
Physical RAM drive
100000 - 10FFFF Extended memory/
High Memory Area (HMA)
0D0000 - 0DFFFF ROM DOS
0C0000 - 0CFFFF PC card memory
0B8000 - 0BFFFF CGA video memory
0A0000 - 0B7FFF Not used
09FFFF End of conventional memory
638K User
00400 - 004FF (256 bytes) BIOS data
BC
NF
Reader Specifications
DFFFFF End of application flash
320K
-64K
256K
64K
128K
64K
64K
32K
96K
80K
640K
512K
800000 Start of user flash
160000 - 79FFFF No memory
A
Drive D
Application flash
C14000 Start of application flash
C00000 - C13FFF ROM DOS
880000 - BFFFFF No memory
87FFFF End of user flash
Drive C
User flash
2020U.016
A-15