> >> Has anyone every tried/had any luck using a HD20 on any Apple2? I'm > >> thinking in particular about the 2c+. > >The wiring's different. Won't work, and it may damage something in both > >the HD20 and the Apple. > Yeah, everybody says that, but I thought for sure that it was an HD20 that I > had hooked up to an Apple IIe at school for years, before I went FOCUS and > CCFM. It used a Sandwiche II card in the iie as the interface card.
As I stated earlier, I don't think the hardware ports are so different. You can plug the same 800 kb drives to both the //c+ and any Macintosh. There is only one little difference between early Apple ][ DB-19 external drive connectors and the ones used in Macintoshes: the Apple ]['s didn't provide the motor speed and disk eject signals, both of them present in the Macintosh. But later Apple ][ models (the 'revised' //c, the //gs, the //c+ and the //e with a 3.5"-capable disk controller) provide both signals and thus can use the same drives as the Macintosh. Usually, the only difference between a Mac and an Apple ][ 3.5" external drive is the eject button - most Apple ][ software doesn't know how to eject a disk, and thus a manual eject button is needed. Anyway, this may proof the ports' hardware compatibility (I'm quite sure that a HD20 can be plugged into any 3.5"-capable Apple ][ without harm). But even if the harware is compatible, we need software to detect and handle it. In other words: we need an SmartPort or ProDOS driver capable of using the HD20. That would be, IMHO, the biggest problem for using an HD20 on an Apple //c+. If the //e you talk of had a non-Apple disk controller card, we can suppose that the card's ROM contained code to detect the HD20 and an SmartPort-compatible driver to allow it to work under ProDOS. If that is true, ProDOS would be able to happilly boot from it :-) . Greetings, Antonio Rodríguez (Grijan) <ftp://grijan.cjb.net:21000/> -- Apple2list is sponsored by <http://lowendmac.com/> and... / Buy books, CDs, videos, and more from Amazon.com \ / <http://www.amazon.com/exec/obidos/redirect-home/lowendmac> \ Support Low End Mac <http://lowendmac.com/lists/support.html> Apple2list info: <http://lowendmac.com/lists/apple2.html> --> AOL users, remove "mailto:"; 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/apple2list%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
