and problem solved, ended up figuring it out
I now have it booting up just fine and have Open Transport 1.1.2 installed, now I can backup the 520 via FTP like the 520c and only need another AAUI transponder so I can do both at the same time, woohoo.
Welcome, new comrade! I'm glad you solved your problem, but I still have a couple of "peripheral recommendations" to help w/future problems.
1) Get a the proper cable, a/o adapter and a bootable, external Mac CD-ROM drive and start collecting the Disc Images you need to do boot/installs.
2) Get the SCSI Disk Mode Cable and a pass thru terminator to couple with the above cabling/adapter and you can back up any Problematic PB with that mode without
any working OS on the 'book. [
] ]'>
3) Using SCSI Disk Mode you can install
any system on a 'book from
any stable Mac w/OS compatibility. [
] ]'>
and I still have the install floppy turns out so I'm basically dumping the 520's drive in StuffIt archives to the 520c with the Zip and either leaving them there or FTPing them as .bin files to load in the emulator.