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04.09. I need an Enhanced BIOS to access >504MB. How do I get one?




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This item is from the Yet Another Enhanced IDE/Fast-ATA/ATA-2 FAQ, by John Wehman and Peter den Haan with numerous contributions by others. (v1.92).

04.09. I need an Enhanced BIOS to access >504MB. How do I get one?

The options are: a new mainboard BIOS, add-on BIOS, or software.

o To upgrade your mainboard BIOS, either with a newer version of your current BIOS or using a custom made BIOS from firms such as Microid Research (MR BIOS), is probably the best option. It may or may not be more effective to replace the entire mainboard and get all the latest bells and whistles for $100 more.

o The next option is to purchase a card with an add-on BIOS that effectively replaces the harddisk portion of your mainboard BIOS. An example is LBA Pro from Storage Technologies, sold in the USA by Unicore software, or AMI's AMIDisk Extender. DataTechnology (DTC) also sell such a card.

o Most BIOSes on ATA-2 interfaces, if they have a BIOS at all, also do this. That may be a nice way to go if your present interface isn't up to snuff. For the ISA bus, there are a few "EIDE" interfaces that have a BIOS: examples are the Promise EIDEMax and the SIIG IDE Enhancer.

Either way, you will have to repartition and reformat the (large) harddisk.

o A final option is to use a software solution, like Disk Manager or EZDrive. Software is often supplied free with the drive and relatively easy to install, but has inherent drawbacks. See also Q6.8.

 

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