apple-pascal-1.3-manual

Using a Pascal-Formatted ProFileYou cannot start up Pascal on a ProFile until you format it as a Pascal diskand transfer system files to it from either the 3llz-inch or 51A-inch diskdrives. Do not attempt this until you have read all of Part IIUsing Altemative System ConfigurationsBefore using slot assignments that deviate from those recommended, thereare several things you need to consider. Be sure that you read the followingsection, and "How Pascal Assigns Volume Numbers", which follows later, ifyou use different arrangements.If you are using recommended slot assignments, you do not need to read thissection. You can skip to "What Happens During Start Up."Are You Using Earlier Vernions of Pascal?We have recommended that you put only 51A-inch disk drives in slot 6because earlier versions of Pascal required a 51A-inch disk drive in slot 6 asthe startup device. If you do not plan to use any earlier Pascal programs orany software that must start up from a 51A-inch disk drive in slot 6, you donot need to observe this limitation.About 5%-lnch Disk DrivesThe 51A-inch disk drives differ from other disk devices because they cannotinform the system of their status. Consequently, when you try to start upfrom a 51A-inch disk drive that does not contain a "boot" disk, the system"hangs" with the 51A-inch disk drive spinning. Disk devices of other sizesare able to send the system on to neighboring disk drives. Thus, you mighthave to start the system in two distinct ways depending on the way youarrange your drives and which drive you are booting from.The Startup ProtocolWhen you first turn on your system, its autostart ROM (speciallyprogrammed circuitry) tries to find and load startup information from thedisk in the first disk drive in the startup protocol. This process isI-8Getting Started