JANUS 2050 Vehicle-Mount Computer User’s Manual (4MB)
39
nugget
A
B-8
Types of Memory Used in the JANUS 2050
The JANUS 2050 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.
Address
Contents
Description
FFFFFF
E00000
No Physical Memory
End of 386SX Address Space
C00000
APPLICATION DISK
Drive D
2MB Flash
880000
Unused Address Space
No Physical Memory
(3.5MB)
800000
USER FLASH
Drive C
512K Flash
400000
No Physical Memory
(4MB)
110000
3MB DRAM
Extended Memory
Contains 256K Drive E:
HIMEM is included in this 3MB
100000
HIMEM, 64K
MS-DOS 6.2 Loaded
1MB Real Mode Boundary
FFFFF
FFFF0
RESET VECTOR
(10H Bytes)
Bootstrap Vector
10H ASIC BANKED
F2000
BIOS & PM
(56K)
BIOS Flash, Shadowed
F0000
INT13/19
(4K, 8K allowed)
E0000
BIOS Extensions
(64K)
BIOS Extensions, Shadowed
D0000
Scanner/Decodes
(64K)
Upper memory block
C0000
PC Card Window
(64K)
Can be used for optional upper memory
Содержание Janus 2050
Страница 1: ...P N 065716 001 User s Manual JANUS 2050 Vehicle MountComputer 4MB ...
Страница 2: ...P N 065716 001 User s Manual JANUS 2050 Vehicle MountComputer 4MB ...
Страница 21: ......
Страница 22: ...Getting Started 1 ...
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Страница 40: ...Operating the JANUS 2050 2 ...
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Страница 64: ...Using the JANUS 2050 Software 3 ...
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Страница 96: ...Configuring the JANUS 2050 4 ...
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Страница 112: ...Using PC Cards 5 ...
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Страница 132: ...Communicating With the JANUS 2050 6 ...
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Страница 164: ...Working With IRL 7 ...
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Страница 184: ...code 39 nugget helcond Troubleshooting 8 ...
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Страница 210: ...Command Reference 9 ...
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Страница 220: ...Configuration Commands 10 ...
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Страница 316: ...Advanced Operations 11 ...
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Страница 324: ...Configuration and Full ASCII Charts A ...
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Страница 354: ...Specifications B ...
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Страница 366: ...Software Utility Reference C ...
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Страница 382: ...Glossary G ...
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Страница 406: ...Index I ...
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