Apple Computer Inc duly announced its expected second generation line of laser printers yesterday, crashing the entry price to the line to $2,800. The company also finally embraced MS-DOS micros fully by adding AppleShare PC, available now in the US at $150, which enables MS-DOS micros as well as Apple machines to share data stored on an AppleShare file server; previously, Apple users could access data on the IBM machine but not vice versa. It also enables MS-DOS users to access Apple Laserwriters on the network. The new, fully upgradeable, printer line starts with the simple LaserWriter IIsc, which is usable only with a single Macintosh, but at $2,800 is priced one third below the previous cheapest LaserWriter. Next up, the IInt adds the Adobe Postscript page description language and more memory, and can be used on networks and by MS-DOS as well as Apple machines. It is $4,600. The top of-the-line IIntx has the same processing power and memory as the Macintosh II to make up pages faster and operate on large networks. It costs $6,600. The baby is available now in the US, the other two follow next month. Apple also announced Midi, the Musical Instrument Digital Interface, which links instruments to the Mac and the Apple IIgs so that melodies can be stored on the computer.