Problems modding Shuttle SN68SG2 Award bios.

[prime]

Hi all,

I have an old Shuttle SN68SG2 system, which I'd like to put two floppy drives in....to archive old disks for retro computers.

The hardware on the motherboard of this machine supports two floppies, and if I boot into Linux and tell it's floppy driver that there is a second drive there it will access it successfully.

However there is only the option for one floppy in the BIOS, so I took a copy of the latest bios and used modbin on it and enabled the option for a second floppy. Whilst I was about it I also added back the options for 1.2MB and 360K drives.....

I flashed the updated bios and all went well I can go into the bios, the option for a second drive is there and I can enable the second drive without problems. I exit the normal way using save settings and exit, but the second drive is still not detected Going back into the bios it's settings have been reset to 'none'.


I even tried directly edititing the cmos ram with out instructions from DOS, remembering to set the checksum at $2F correctly too. But on reboot the settings get reset.

Does anyone have any clue what might be causing this?

Original unmodified bios :
  SN68SS0Q.BIN (Size: 512 KB / Downloads: 0)
Modified Bios :
  SN68S_DB.BIN (Size: 512 KB / Downloads: 1)


Cheers.

Phill.