Is my BIOS chip flashable?
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
There are newer BIOS chips coming out all the time. if your computer was made after 2000 the chances are that the BIOS is flashable.
NOTE: it is not always advisable to FLASH. in some cases a chip is perferable. weather because some boards are more likely to fail during flash or because you have already tried to flash and failed. in these cases it is perferable to change the chip.
