IBM 560z Supplementary Manual
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.
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.
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ThinkPad 560Z Preface