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 25 page image

1-16 Technical InformationSERIAL INTERFACEThe RS-232C serial port is a 9-pin connector on the system’s rear panel. The serial portconsists of a 16550A compatible serial port controller with a programmable baud rate up to115,200 bps. The serial port connects an RS-232C device or an external modem. The de-fault serial port address is 3F8h and the interrupt level is IRQ04.NEC VERSA CHIP SETRefer to Table Section 1-3 for a quick summary of the chip types used in the system. Seethe Abbreviations section at the beginning of this manual for a translation of chip technolo-gies acronyms.Table Section 1-3 NEC Versa 2600 Series Chip Types and TechnologiesChip Manufacturer Description TechnologyIntel Pentium P54CSLMIntel Pentium P55CLIntelIntel133 MHz CPU150MMX320-pin TCP320-pin TCPN28F020-150 Intel 256k x 8 Flash ROM 32-pin TSOP82C557M Opti Viper N+ System Controller 208-pin TQFP82C556M Opti Viper N+ Data Path Controller 176-pin TQFP82C558E Opti Viper N+ PCI IDE ISA Xcelerator 208-pin TQFPPC87336VJG NationalSemiconductorDiskette Controller, IDE,Parallel Interface100-pin QFPH8/3434 Hitachi Keyboard Controller 100-pin TQFPC&T 65550B Chips &TechnologiesVGA Controller 208-pin FQFPOZ6730D O2 Micro PC Card Controller 208-pin PQFPESS1688 ESS Sound Controller 100-pin PQFPIntel Pentium P55CLM MicroprocessorThe 133 MHz Intel Pentium microprocessor used in the NEC Versa series computer is builton Intel’s advanced 3.3V BiCMOS silicon technology. The CPU has power managementfeatures. NEC adopted the chip specifically for its pipelined Floating Point Unit (FPU), andlocal interrupt management.256K X Flash ROMThe N28F020 flash ROM is a 40-pin, (TSOP). The chip allows easy updates to the system'sBIOS if needed. More specifically, the ROM is flashed electronically, installing the latestBIOS revisions to the system. It is possible to reprogram the BIOS up to 100,000 times.See Section 2, Setup and Operation, for BIOS update procedures.SOLD BY laptopia2005 DO NOT RESELL!!SOLD BY laptopia2005 DO NOT RESELL!!