I guess I'll be the bearer of bad news here... I am almost positive the A1000 does NOT have a jumper selection like the A2000 does that allows DF1: to boot. Also, the floppy drive in a 500 is much smaller and thinner than the 1000's. I do not believe they would be easily interchangeable. This and the buttons are different. Wider and thinner on the A500. You might have better luck simply tracking down an external 1010 floppy drive, remove its guts and swap out with the A1000...