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How do you determine if your system has a Flash Bios chip ?

Scan and find the right bios update!

Take the cover of the computer and look inside. Peel the sticker of the BIOS chip (28 or 32-pin DIP IC with the BIOS brand sticker on it). (source: c't 2/97/110)

  • Am29F010: AMD 5 volt flash ROM
  • Am28F010, Am28F010A: AMD 12 volt flash ROM
  • AT28C010, AT28MC010, AT29C010, AT29LC010, AT29MC010: Atmel 5 volt flash ROM
  • CAT28F010V5, CAT28F010V5I: Catalyst 5 volt flash ROM
  • CAT28F010, CAT28F010I: Catalyst 12 volt flash ROM
  • 28F010: Fujitsu 12 volt flash ROM or ISSI 12 volt flash ROM
  • HN58C1000: Hitachi 5 volt flash ROM
  • HN28F101, HN29C010, HN29C010B, HN58C1001, HN58V1001: Hitachi 12 volt flash ROM
  • A28F010, 28F001BX-B, 28F001BX-T, 28F010: Intel 12 volt flash ROM
  • M5M28F101FP, M5M28F101P, M5M28F101RV, M5M28F101VP: Mitsubishi 12 volt flash ROM
  • MX28F1000: MXIC 12 volt flash ROM
  • MSM28F101: OKI 12 volt flash ROM
  • KM29C010: Samsung 5 volt flash ROM
  • DQ28C010, DYM28C010, DQM28C010A: SEEQ 5 volt flash ROM
  • DQ47F010, DQ48F010: SEEQ 12 volt flash ROM
  • M28F010, M28F1001: SGS-Thomson 12 volt flash ROM
  • 28EE011, 29EE010: SST 5 volt flash ROM
  • PH29EE010: SST ROM Chip - Flashable
  • TMS29F010: Texas-Instr. 5 volt flash ROM
  • TMS28F010: Texas-Instr. 12 volt flash ROM
  • W29EE011: Winbond 5 volt flash ROM
  • W27F010: Winbond 12 volt flash ROM
  • X28C010, X28C010I, XM28C010, XM28C010I: XICOR 5 volt flash ROM
  • 29LVxxx - 3V Flash memory (rare)
  • 28Cxxx - EEPROM, similar to Flash memory
  • 27Cxxx - With window. EPROM: read-only, requires programmer to write and UV to erase.

Anything without a Window that doesn't have a 28 or 29 as the preceding numbers of the part #, is most likely a standard ROM.

Go back to our BIOS FAQ.