I'm not sure if there even is a manual for it. The documentation for it is on a readme file with the installation disk. Mine has a 300mb Maxtor ide 3.5" disk in it. btw, the AT500 will only take one ide drive, so forget about cdrom. The nice thing about it though is you can put 8mb of 30 pin standard simms in it (you'll need four 4mb ones because there's only four slots). There also is a 2.5" ide header if you have one of those drives and of course there's the extra kickstart rom slot with an external switch. I have an older 1.3 rom there just in case and softkick mine from the 2.04 rom on the a500 m/b into 3.1 using Zkick/Skick???