apple-pascal-1.3-manual

Table 2-1. Pascal Swapping LevelsTc SelectSwap Option OffLevel 1Swapping OnLevel 2Swapping OnType02To GetSwapping set to OFF. Set automatically atstartup or by typing 0 from the Swap command.First-level swapping set to ON to get 227 4 bytesof additional memory.Second-level swapping set to ON to gain 810more bytes of memory, in addition to thefirst-level memory gain.The third choice, second-level swapping, provides more memory space bymoving the GET and PUT procedures from disk to memory only when theyare needed by your program. For this reason, using GET or PUT for files onblock-structured devices will be slow when using this swapping option.READ and WRITE, which use GET and PUT, will also be slow. UNITREAD,UNITWRITE, BLOCKREAD, and BLOCKWRITE will be unaffected.One Disk Drive I When swapping is on, you must leave the system disk in the startup driveto perform all operations except the execution of Filer commands.For a description of how to use these swapping options from a programwhen chaining to another program, see Chapter 16 of Part III.Make ExecThe Make exec command is used to create exec files. You invoke thiscommand by typing M from the Command level. For a full explanation ofexec files see Appendix 2E of this Part.Quit-Typing a from the Command level restarts the system. Before it does, youwill be asked for confirmation:Do you wish to exit the Pascal system? CY/N)Read "What Happens During Start Up" in Part I for more description of thestartup process.The Command-Level OptionsII-17