Lenovo ThinkPad 560E TP 560Z Technical Reference Manual - Page 6
Attention, ThinkPad 560Z Preface, When the contents of a register are changed,
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Attention The term Reserved describes certain signals, bits, and registers that should not be changed. Use of reserved areas can cause compatibility problems, loss of data, or permanent damage to the hardware. When the contents of a register are changed, the state of the reserved bits must be preserved. If possible, read the register first and change only the bits that must be changed. vi ThinkPad 560Z Preface
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Attention
The term
Reserved
describes certain signals, bits, and registers
that should not be changed.
Use of reserved areas can cause
compatibility problems, loss of data, or permanent damage to the
hardware.
When the contents of a register are changed, the
state of the reserved bits must be preserved.
If possible, read
the register first and change only the bits that must be changed.
vi
ThinkPad 560Z Preface