This book doesn't contain any logic gate level designs but covers general computer organisation issues thoroughly. It is only 670 pages approximately and covers instruction set design, CPU structure (ALU + control unit), I/O (such as SCSI, FireWire and RAID), Bus systems (PCI, Futurebus+) and operating systems etc. There are numerous comparisons made between Intel Pentium and PowerPC. It is a good book to start with a very good bibliography for more detailed books on each chapter's subject.