Toshiba Tecra M2-S519 Maintenance Manual - Page 25
One AC'97Codec AD1981B chip and AC-Link controller embedded in ICH4-M
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1.2 System Unit Block Diagram 1 Hardware Overview Firmware Hub (FWH) • One STMicro M50FW080N1 is used. • This gate array has the following features: - Firmware hub hardware interface mode - Two configurable interfaces - Program/erase controller - Program and erase suspend - 8Mbits of flash memory for platform code/data nonvolatile storage - Address/Address-Multiplexed (A/A Mux) interface/mode - Case temperature operating range - Vcc: 3V to 0.36V - Vpp: 12V for fast programming • 8Mbits of flash memory are used as shown below: - 64KB are used for VGA-BIOS. - 288KB are used for system BIOS. - 8KB are used for plug and play data area. - 8KB are used for password security. - 16KB are used for boot strap. - 32KB are used for ACPI P code. - 48KB are used for LOGO. - 128KB are reserved for LAN BIOS. − 432KB are reserved. VGA Controller One nVIDIA NV34M chip is used. The video controller incorporates graphics accelerator and video accelerator. • Internal VRAM, 32MB/64MB DDR 250MHz • AGP bus R2.0 ×4 • LCD Interface LVDS 2ch • TV Encoder: Supports S-video • DVI Supported by Dock Sound Controller • One AC'97Codec AD1981B chip and AC-Link controller embedded in ICH4-M • SW sound TECRA M2 Maintenance Manual (960-468) 1-11