Can Promise Raid read HPT370 mirror

I have a dead ABIT KG7 Raid MB (HPT370
Raid controller on the board) with a Raid 1
mirror set (probably working just fine).
I just bought an ASUS A8V-DX MB to replace
the dead KG7. The A8V-DX has a Promise
PDC20378 Raid controller onboard.
Both Raid controllers are parallel ATA, IDE,
ultra133.
Can I move the two mirrored drives from the
KG7 to the A8V-DX? Will the files remain
intact?
If not, can I take just one of the mirrored drives
out of the old system and use it as a single,
non-Raid drive, without losing data or going
through some sort of conversion? Will the disk
be damaged if I try to read it on the plain old
IDE bus?
THANKS for any advice you can give me!!