Operating system direct to hardware using a
direct driver. Direct drivers, which bypass BIOS,
have the advantage of faster throughput, but the
disadvantage of limited error-handling capability and
reduced software and hardware compatibility and
flexibility. This method is not used in the IBM PC
Series systems.
Operating system to BIOS to hardware. This is the
recommended way. It's the most flexible because it's
independent of the hardware.
Applications to operating system to BIOS to
hardware. This method is inflexible and operating
system dependent.
Applications to BIOS to hardware. This method
has some flexibility but it is BIOS dependent.
Applications to hardware. This method is hardware
dependent and very inflexible, however, it is very fast,
very efficient, and it has no overhead.
Adding adapters to the System
When adapters are added to the system, an area in
memory has to be allocated to run its programs. This can
be done with either hardware switches or software
mapping.
If there is a conflict in software mapping:
The first device to attach to an IRQ, DMA, I/O
Address, or RAM location will probably function. The
second device will not be found.
Standalone diagnostics might function properly
because the device that was found is the only device
running.
Software configuration conflicts occur when:
Hardware is configured differently then the software
using it expects it to be.
Hardware memory address space is in conflict with
memory used by the application software.
System Resource Conflicts
System failures occur when there are system resource
conflicts with the:
Interrupt Request Queue (IRQ)
Direct Memory Access (DMA)
I/O Address
ROM and RAM Addresses
IRQ:
Assigns a unique interrupt request line to every I/O
device (line numbers range from 0 to 15).
Interrupts the processor to force it to service the
request.
Handles interrupts on a priority basis (low numbers
have the highest priority).
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IBM PC 300/700, IntelliStation Series HMM
Summary of Contents for 689912U - IntelliStation Z - Pro 6899
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Page 95: ...Notes Service Information 85...
Page 96: ...Type 6272 Parts 1 2 3 4 5 6 7 8 9 10 11 86 IBM PC 300 700 IntelliStation Series HMM...
Page 99: ...Type 6275 Parts 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Service Information 89...
Page 101: ...Type 6282 6284 Parts 1 2 3 4 5 6 7 8 9 10 11 12 Service Information 91...
Page 106: ...Type 6X7X Parts 10 1 2 5 4 6 9 7 8 3 96 IBM PC 300 700 IntelliStation Series HMM...
Page 107: ...Type 6X8X Parts 1 2 3 4 10 11 5 6 7 8 9 Service Information 97...
Page 117: ...Type 6560 Parts 1 2 3 4 5 6 7 8 9 Service Information 107...
Page 131: ...Type 6598 Parts 1 2 3 4 5 6 7 8 9 10 11 12 Service Information 121...
Page 133: ...Type 6862 Parts 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Service Information 123...
Page 141: ...Type 6893 Parts 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Service Information 131...
Page 275: ...Computer Exploded View Type 6282 6284 Reference Information 265...
Page 281: ...Computer Exploded View Type 6X7X Reference Information 271...
Page 282: ...Computer Exploded View Type 6X8X 272 IBM PC 300 700 IntelliStation Series HMM...
Page 283: ...Computer Exploded View Type 6560 Reference Information 273...
Page 292: ...Drive Cage Service Type 6562 282 IBM PC 300 700 IntelliStation Series HMM...
Page 315: ...Cage Removal Type 6889 Reference Information 305...
Page 321: ...Tab Removal Type 6892 Fan Removal Type 6892 Tab Hooks Reference Information 311...
Page 328: ...Cage Removal Type 6898 318 IBM PC 300 700 IntelliStation Series HMM...
Page 330: ...Unlock the cover before removing 320 IBM PC 300 700 IntelliStation Series HMM...
Page 331: ...Keylock Assembly Exploded View Desktop Models Reference Information 321...
Page 349: ...PC 330 350 Series Type 65X5 Pentium 60 MHz System Board Reference Information 339...
Page 470: ...460 IBM PC 300 700 IntelliStation Series HMM...
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Page 472: ...IBM Part Number 10L9181 Printed in U S A S83G 7789 16...