AV Serial Extension

Application file: 

AVSerialExtension-10.sit_.bin

This extension enhances the functionality of your Macintosh Quadra 840AV, Macintosh Quadra 660AV, or Macintosh Centris 660AV. Specifically, the extension corrects certain reported
problems. These include (a) difficulties when printing with the LaserWriter Select 310 printer; (b) a possible system error when both the serial port and an AppleTalk( network connection are being used heavily; and (c) a possible system crash when simultaneously receiving a fax and transferring
files over a network.

AV Serial Extension v1.0