AWCTTYPA@UIAMVS.BITNET ("David A. Lyons") (01/09/89)
>Date: Sun, 8 Jan 89 00:32:24 GMT >From: Seymour Joseph <elbereth.rutgers.edu!joseph@RUTGERS.EDU> >Subject: Re: AppleTalk >in addition, GS/OS comes with special appletalk drivers that allow >some pre-Appletalk applications to print to appletalk printers. You >use the provided chooser application and then tell the old >application that your printer is in slot seven. GS/OS fools the app >into thinking there is an old super serial card in 7 while it pumps >the data out to the networked printer.... Just to be a little picky, the "ImageWriter emulator" (IWEM) has been on GS System Disks for quite a while, and it's not really GS/OS (or ProDOS 16 on older system disks) that's doing the work (although you need to boot _through_ a 16-bit OS to get all the stuff loaded). Once you've booted & used the Chooser to get the ImageWriter emulator downloaded into your laser printer (if you're using a laser printer), you can print to slot 7 _even from ProDOS 8_, when GS/OS is not in memory. The AppleTalk firmware in ROM is set up to look like a super serial card (GS/OS can't change how the ROM looks to the application), but that firmware is smart enough to go through "hooks" in RAM so that (major-sized) patches can be loaded from disk when you boot. >Seymour --David A. Lyons bitnet: awcttypa@uiamvs DAL Systems CompuServe: 72177,3233 P.O. Box 287 GEnie mail: D.LYONS2 North Liberty, IA 52317 AppleLinkPE: Dave Lyons