kelly@ipla01.hac.com (Keith Kelly) (10/08/90)
Could someone explain the difference between the MAC 512, 512K, 512KE and any of the other varients of the MAC 512? Thanks in advance. -- Keith Kelly Internet : kelly@ipla01.hac.com Hughes Aircraft Company UUCP : uunet!hacgate!ipla01!kelly Canoga Park, Calif Phone : (818) 702-2328
drz@po.cwru.edu (David R. Zinkin) (10/08/90)
The Mac 512 has the original 64K Mac ROM set found in the Macintosh 128.
It supports only 400k floppy drives and the original Macintosh File System
(flat-file, no folders). It's also called the Mac 512K or the Mac 512K
unenhanced.
The Mac 512KE has the same 128K ROM set found in the Macintosh Plus. It
supports the 800K floppy drives and the Hierarchical File System
(folders). It's also called the Mac 512E or the 512 enhanced.
I believe that these are the only "Mac 512" models ever made by Apple.
(Of course, I've been wrong before.) Neither is still manufactured, though
a 512-to-512KE upgrade kit, which must be installed by an "authorized
Apple dealer", is still available.
(Then again, remember *who* authorizes the dealers. Scary, isn't it?!)
---------------------------------------------------------------
David Zinkin -- Case Western Reserve University (Student) and
Rochester General Hospital Radiology Dept. (Consultant)
INTERNET: drz@po.cwru.edu BITNET: drz%po.cwru.edu@cunyvmdlugose@uncecs.edu (Dan Dlugose) (10/15/90)
In article <1990Oct8.035009.23730@usenet.ins.cwru.edu> drz@po.cwru.edu (David R. Zinkin) writes: >The Mac 512 has the original 64K Mac ROM set found in the Macintosh 128. >It supports only 400k floppy drives and the original Macintosh File System >(flat-file, no folders). It's also called the Mac 512K or the Mac 512K >unenhanced. This is not the whole truth about Mac 512's (or 128's). They can be made to support HFS and 800K drives without a ROM upgrade. Apple came out with HD20 disks before 128K ROMs, so they released a file called Hard Disk 20 to put in your System Folder. If it's there, the 128 or 512 unenhanced will support an external 800K drive and HFS disks. I'm sure hundreds or thousands of people wasted money on upgrades when all they wanted was an 800K floppy or a Hard Disk 20. I can email copies of this file. Dan Dlugose UNC Educational Computing Service -- Dan Dlugose Internet: dlugose@uncecs.edu UNC Educational Computing Service Box 12035, Research Triangle Park, NC 27709-2035