MiTAC E-8590, Service Manual, Page: 15 / 252

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LCD PC E
LCD PC E
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8590 MAINTENANCE
8590 MAINTENANCE
snoop overhead. In addition, advanced features are supported such as snoop ahead, snoop filtering, L1 write-back
forward to PCI master, and L1 write-back merged with PCI post write buffers to minimize PCI master read latency
and DRAM utilization. Delay transaction and read caching mechanisms are also implemented for further
improvement of overall system performance.
The P4N266 North Bridge also integrates S3 Graphics’ Savage4 graphics accelerator into a single chip. The
P4N266 brings mainstream graphics performance to the Value PC with leading-edge 2D, 3D and DVD video
acceleration into a cost effective package. Based on its capabilities, the P4N266 is an ideal solution for the consumer,
corporate mobile users and entry level professionals.
The industry’s first integrated Pentium 4 AGP 4x solution to support DDR memory, the P4N266 combines AGP
4x performance with Microsoft DirectX texture compression and massive 2Kx2K textures to deliver unprecedented
3D performance and image quality for the Value PC mobile market. For sophisticated power management, the
VT8703 provides independent clock stop control for the CPU / SDRAM and AGP bus plus Dynamic CKE control
for powering down of the SDRAM. A separate suspend-well plane is implemented for the SDRAM control signals
for Suspend-to-DRAM operation. Coupled with the VT8233 south bridge chip, a complete power conscious PC
main board can be implemented with no external TTLs.
Featuring a new super-pipelined 128-bit engine, the P4N266 chipset utilizes a single cycle architecture that
provides high performance along with superior image quality. Several new features enhance the 3D architecture,
including single-pass multitexturing, anisotropic filtering, and an 8-bit stencil buffer. The P4N266 also offers the
industry’s only simultaneous usage of single-pass multitexturing and single-cycle trilinear filtering – enabling
stunning image quality without performance loss. The P4N266 further enhances image quality with true 32-bit color
rendering throughout the 3D pipeline to produce more vivid and realistic images. The P4N266’s advanced triangle
High-Performance 3D Accelerator