The Korg A1 was a stereo effects processor made in the early '90. It uses a MCR-03 RAM card (the same as the M1). Unfortunately, it has a battery backed-up RAM which is volatile. If you lose battery power (after about 5 to 7 yrs.), you lose your presets, unless you have them backed up on RAM cards.
We may have a MCR-03 with A1 patches available for sale... I'll have to check and post you back..
Steve Martin
Ward Music Ltd.