2-7
2.2 Processor
The T2200SX CPU is an Intel 80386SX-20 microprocessor. The 80386SX operates in both, real
and protected modes. Real mode can only directly access 1MB of memory. The architecture is the
same as the 8086, but allows access to the 32-bit register set of the 80386SX. The protected mode
allows the 80386SX to increases the linear address space to access four gigabytes. This allows the
virtual memory to run programs of almost unlimited size. Virtual Memory management is based on
segmentation, four levels of protection, and an optional paging mechanism. For the details about the
80386SX hardware and its instruction set, refer to the Intel 80386SX Hardware Reference Manual
and Programmer’s Reference Manual.
2.2.1
Clock Mode
The 80386SX processor can operate at clock rates of 20MHz (high speed) and 10 MHz (low speed).
To switch between the two rates, hold down the
Fn
key, and press the
PgDn
key to select slow
speed; pressing the
Fn
and
PgUp
keys returns the processor to high speed. The slow speed may be
required by some software packages.
2.2.2
Sleep Mode
The 80386SX processor sleep function is executed by the HALT command from the CPU. When
the CPU executes the HALT command, the clock speed reduces to 5MHz to save power.
Содержание T-Series T2200sx
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Страница 42: ...2 26 2 13 Connectors Appendix B contains the pin assignments for the connectors within the T2200SX ...
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Страница 191: ...App 1 Appendices ...
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Страница 195: ...App 5 Appendix A System Board Layout A 1 System Board FSTFGx ICs Figure A 1 System board FSTFGx ICs front A D D C B ...
Страница 196: ...App 6 Figure A 2 System board FSTFGx ICs back G G G G E F J H I K ...
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Страница 199: ...App 9 A 2 System Board FSTFGx Connectors Figure A 3 System board FSTFGx connectors front M G I D B R K L L H N J O C F ...
Страница 200: ...App 10 Figure A 4 System board FSTFGx connectors back E A P Q ...
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Страница 203: ...App 13 A 3 System Board FSTFGx OSCs Figure A 5 System board FSTFGx OSCs front F G H E ...
Страница 204: ...App 14 Figure A 6 System board FSTFGx OSCs back A B C D ...
Страница 215: ...App 25 Appendix C ASCII Character Codes Table C 1 ASCII character codes ...
Страница 222: ...App 32 E 3 German Keyboard Figure E 3 German keyboard E 4 French Keyboard Figure E 4 French keyboard ...