NEC Versa 2600 Series Service Manual

Also see for 2600: Specifications Owner's manual Service guide User guide

Contents

NEC Versa 2600 Series Service Manual Manual pdf 26 page image

Technical Information 1-17The N28F020 provides the system upgrade capability as well as the following: 256 KB memory Quick-Pulse Programming Algorithm 150 nanoseconds (ns) maximum access time ETOX Nonvolatile flash technology CMOS low power consumptionROM BIOSThe system uses a Flash ROM known as the system's ROM BIOS to store machine lan-guage programs. The BIOS size is 256 KB, consisting of the system utility (for PC cards,Auto Setup), system BIOS, video BIOS, and power management.The BIOS programs execute the power-on self-test (POST), initialize CPU controllers, andinteract with the LCD indicator panel, diskette drive, hard drive, communication devicesand peripherals. The system BIOS also contains Auto Setup and provides VGA controllersupport. The ROM BIOS is copied into RAM (shadowing) for optimum performance.The ROM BIOS contains both the system and video BIOS. The system BIOS is located inthe upper portion of the device, video BIOS is located in the lower portion. System BIOS islocated between F000h-FFFFh.The BIOS often changes after the product release to provide enhanced features or bugfixes. To acquire the latest BIOS release, the ROM is flashed electronically allowing theBIOS update to occur without removing the ROM. See Section 2, Setup and Operation, forBIOS upgrade procedures.VGA ControllerThe Chips and Technologies 65550B is a PCI 64-bit Graphics Accelerator. The integratedprogrammable linear address feature accelerates the graphics user interface (GUI) perform-ance. The controller also supports Hardware Multimedia and VESA interface standards.The controller provides advanced power management that helps to minimize power usagein: normal operation Standby (sleep) mode panel off power saving modes.SOLD BY laptopia2005 DO NOT RESELL!!SOLD BY laptopia2005 DO NOT RESELL!!