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Tutorials | Is my BIOS flashable

Publish date: 18:52 Thursday, 28th July 2005
Written by: Postcode
Audience intended for: Hardware
Category: Computer Hardware

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To determine if your motherboard uses a CMOS chip that is flashable your going to have to examine the chip ID on the chip itself. In a lot of instances there is a sticker on the top of the chip that identifies the manufacturer. You can pull the sticker back gently to reveal the chip information. Replace the sticker once you have acquired the chip information. The following list contains chips that are flashable:

m29F010: AMD 5 volt flash ROM
Am28F010, Am28F010A: AMD 12 volt flash ROM
AT28C010, AT28MC010, AT29C010, AT29LC010, AT29MC010, AT49F002T: 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, W29C020C, W49F002U: 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, 29, or 49( the latest chip models) as the preceding numbers of the part number is most likely a standard ROM and not flashable.

 

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