Re: Old 486 trying to fdisk etc. - MS-DOS

unix · #1 01-01-1970, 12:00 AM

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Date: 6 Aug 2005 16:51:54 -0500
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On 2005-08-06 michael.shergold@auntieclara.net said:

> Old PC now has NEC CD fitted and I am trying to boot from
> that but the BIOS is not giving the boot sequence option
> and the floppy Bootmaster program I have tried doesn't find
> it either.. Perhaps because the original C: drive was partitioned.
> Fdisk to the C: drive seems unsuccessful and the CD drive is still
> not found by the Boot program
> Any suggestions welcome
>
> Michael

I've never seen a 486 that has the native ability to boot from
a CD-ROM.

Re-partitioning the hard drive won't help. Problem is, the
normal 486 BIOS simply doesn't support booting from a CD-ROM.

See, neither the 486 BIOS nor DOS know anything about CD-ROMs.
That's why, when you're running DOS, it's necessary to load a
software driver for the CD-ROM drive itself, and then load
another driver which implements the 'CD-ROM Extensions' for
DOS to use (MSCDEX under M$-DOS, NWCDEX under DR-DOS, etc.).

'Fraid you're plumb outta luck, son. You'll have to boot from
a floppy disk -- the way God intended that a computer should
boot. Or from the hard drive, of course.

But by all means, do get rid of that 'boot manager' program
that's currently installed on the hard drive. It'll cause you
untold grief later on down the road.

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