The LC 520 is pretty much an all in one version of the LC III. They can be upgraded to an LC 550 (boost up to 33Mhz from 25Mhz) or an LC 575 (with an 040 CPU) simply by swapping in the different logic boards.
Do your 520s have caddy or tray load CD-ROM drives? Manual or auto inject floppy drives? If the one has At-Ease installed, you may be able to bypass it by changing the SCSI ID and connecting it to another Mac so it's not the boot drive. Also try disconnecting the drive and doing a PRAM zap then boot from a floppy so you can have a look at how much RAM it has. Like the LC III and Performa 460/LC III+, the LC 520 and LC 550 have 4 megs RAM built in and one 72pin SIMM slot. Normally the biggest SIMM you can fit is 32megs, but MicroMac (and possibly others) make (way overpriced) SIMMs for them that go up to 128meg. ===== http://www.junkscience.com "All the Junk that's fit to Debunk!" __________________________________________________ Do You Yahoo!? LAUNCH - Your Yahoo! Music Experience http://launch.yahoo.com -- Vintage Macs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> Vintage Macs list info: <http://lowendmac.com/lists/vintagemacs.shtml> The FAQ: <http://macfaq.org/> Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
