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Text File | 1993-03-31 | 14.6 KB | 237 lines

Θ$-Analyzes your setup and recommends configuration changes that will maximize the largest executable program size. OPTIMIZE [[d:][path]filename] [/M] [/P] [/n] filename File to write output to. /M Use monochrome video attributes. /P Output the results to the printer. /n LPT port to direct printer output to. $Requires DOS 5 or DOS 6 $Syntax: OPTIMIZE [[d:][path]filename] [/M] [/P] [/n] $Printer not ready $File could not be created $Error writing file to disk $ COMMANDEMMXXXX0386MAX$$ ╕ OPTIMIZE Browse: PgUp PgDn Home End Print: Ctrl-P Exit: Esc ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ ░ ░ ░ OPTIMIZE 1.1 Copyright (c) 1993 Jeff Prosise ░ ░ From: PC Magazine DOS 6 Memory Management with Utilities ░ ░ ░ ░ Lines marked with asterisks (*) indicate areas of ░ ░ memory in which further savings are possible ░ ░ ░ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ @STACKS Tests indicate that your PC was started with a setting of STACKS=%,%. You can add % bytes to the largest executable program size by switching to STACKS=0,0. If STACKS=0,0 causes DOS to crash due to internal stack overflows, restore the original STACKS setting and reboot. See Chapter 6 for details. Tests indicate that your PC was started with a setting of STACKS=0,0, eliminating the space that DOS sets aside internally to provide stack space for hardware interrupts. Additional stack space is not necessary on most PCs, so this a convenient way to economize on RAM usage. If STACKS=0,0 causes DOS to crash due to internal stack overflows, increase the STACKS setting and reboot. @LASTDRIVE DOS has reserved room for % logical drives, but only % logical drives are defined. You can save % bytes of RAM by adding the statement LASTDRIVE=x to your CONFIG.SYS file. See Chapter 6 for details. Currently, the highest drive letter defined in your system is x. Before you switch to LASTDRIVE=x, you will also need to modify any commands that create logical drives with drive letters higher than x (for example, SUBST commands and commands that create network drives) so that none of the drive letters exceeds the maximum you specify with LASTDRIVE. DOS has reserved room for % logical drives, and you have exactly % logical drives defined. This eliminates the wasted space that results when there are more slots reserved for logical drives than there are logical drives to fill them. @FCBS Your PC was started with a setting of FCBS=%, permitting up to % files opened with file control blocks to be open concurrently. You can save % bytes of RAM by switching to a setting of FCBS=1. Note that higher FCBS settings may be required to accommodate programs that use file control blocks to perform file operations. See Chapter 6 for details. Your PC was started with a setting of FCBS=1. This reduces to a minimum the space that DOS reserves for file control blocks in conventional memory, because the lowest FCBS setting DOS will accept is FCBS=1. Note that higher FCBS settings may be required to accommodate programs that use file control blocks to perform file operations. @FILES The system file table currently contains room for 8 entries, permitting up to 8 files opened with file handles to be open concurrently. Eight is the lowest FILES setting DOS will accept, so there's nothing more to be saved here. The system file table currently contains room for % entries, permitting up to % files opened with file handles to be open concurrently. DOS will accept FILES settings as low as 8. Use the FILEMON utility supplied with this book to determine if you can save memory by decreasing the FILES setting. See Chapter 6 for details. Tests indicate that your PC is configured to use upper memory, but that all of the system file table is located in conventional memory. You can use the UMBFILES utility supplied with this book to move part of the system file table to upper memory. Doing so could increase the largest executable program size by up to % bytes. See Chapter 3 for details. Tests indicate that your PC is a 386 or higher but that there is no upper memory available to DOS. When there is upper memory available, the UMBFILES utility supplied with this book can be used to move part of the system file table to upper memory. See Chapter 3 for details. The system file table currently contains room for % entries, permitting up to % files opened with files handles to be open concurrently. Of these entries, % are located in conventional memory and % are located in upper memory. This minimizes the impact that the FILES setting has on the largest executable program size and is an efficient way to put upper memory to work under DOS 5 and DOS 6. Note that Windows will not start in 386 enhanced mode on some PCs unless FILES is set to at least 10 or 12. The system file table currently contains room for % entries, permitting up to % files opened with files handles to be open concurrently. Of these entries, % are located in conventional memory and % are located in upper memory. You can add % bytes to the largest executable program size by decreasing the FILES setting in CONFIG.SYS to 8 and increasing the size of the system file table in upper memory by a commensurate amount. Note that Windows will not start in 386 enhanced mode on some PCs unless FILES is set to at least 10 or 12. @DOS HIGH/LOW Tests indicate that your PC is a 286 or higher but that DOS is loaded in conventional memory. You can add up to 60K to the largest executable program size by transferring DOS to the HMA. See Chapter 2 for details. Further tests indicate that there is an XMS driver installed and that the HMA is already allocated. If you choose to load DOS high, you should first disable the program that has allocated the HMA or configure it so that it does not use the HMA. Tests indicate that your PC is a 286 or higher and that DOS is currently loaded in the HMA. This adds up to 60K to the largest executable program size by minimizing DOS's footprint in conventional memory. Although DOS is loaded in the HMA, the disk buffers controlled by the BUFFERS command are not. You can add more than 20K to the largest executable program size by lowering the BUFFERS setting in your CONFIG.SYS file to 42 or less in DOS 6 or 44 or less in DOS 5. See Chapter 2 for details. Tests indicate that your PC contains an 8086 or 8088 microprocessor. As such, you don't have the option of loading DOS in the HMA, which would add up to 60K to the largest executable program size. @UPPER MEMORY Tests also indicate that QEMM-386 or QRAM is providing upper memory support. At present, there is %K of free UMB RAM in the upper memory area. The size of the largest free UMB is %K. If there are TSRs or device drivers remaining in conventional memory, you may be able to free up additional RAM by trans- ferring some of them to upper memory. See Chapter 7 for details. Tests also indicate that 386MAX is providing upper memory support. At present, there is %K of free UMB RAM in the upper memory area. The size of the largest free UMB is %K. If there are TSRs or device drivers remaining in conventional memory, you may be able to free up additional RAM by trans- ferring some of them to upper memory. See Chapter 7 for details. Tests also indicate that EMM386.EXE or another memory manager is providing upper memory support. At present, there is %K of free UMB RAM in the upper memory area. The size of the largest free UMB is %K. If there are TSRs or device drivers remaining in conventional memory, you may be able to free up additional RAM by transferring some of them to upper memory. See Chapter 3 for details. Further analysis indicates that there is %K of unused space in the upper memory area that could be converted to UMB RAM. Use the UMASCAN utility provided with this book to locate this space. See Chapter 3 for details. Tests also indicate that your PC is a 386 or higher, but that there is no UMB RAM available. By loading EMM386.EXE and adding the statement DOS=UMB to your CONFIG.SYS file, you can create upper memory blocks to load TSRs and device drivers into. Shifting these programs to upper memory increases the the space left for application programs in conventional memory. See Chapter 3 for details. Note that OPTIMIZE may be unable to detect the presence of upper memory blocks created by some third-party memory managers if your CONFIG.SYS file does not contain a DOS=UMB statement. If you use a memory manager other than EMM386.EXE, QEMM-386, QRAM, 386MAX, or BlueMAX, use the tools that came with it to determine to what extent upper memory is being utilized. Since your PC is not a 386 or higher, you can't use EMM386.EXE. If your PC contains EMS 4.0 expanded memory hardware or was built using a chip set that supports shadow RAM, you may be able to create upper memory to hold TSRs and device drivers using third-party memory managers. See Chapter 7 for details. @ENVIRONMENT You currently have % bytes of RAM set aside to hold environment strings. At present, only % bytes are used. You can add % bytes to the largest executable program size by loading COMMAND.COM with a /E:% switch. If you receive "Out of environment space" messages from DOS after decreasing the environment size, increase the number following the /E switch. See Chapter 6 for details. You currently have % bytes of RAM set aside to hold environment strings. At present, % bytes are used. Since environment space is allocated by DOS in multiples of 16 bytes, there are no further savings to be had here. If you receive "Out of environment space" messages from DOS, increase the size of the environment by loading COMMAND.COM with a /E switch specifying the desired environment size. You currently have 160 bytes of RAM set aside to hold environment strings. You can't save any more memory here, because the smallest environment size that COMMAND.COM supports is 160 bytes. If you receive "Out of environment space" messages from DOS, increase the environment size by loading COMMAND.COM with a /E switch specifying the desired environment size. @LARGEST EXECUTABLE PROGRAM SIZE Currently, the largest executable program size is %% bytes (this figure may vary slightly from the one reported by the MEM command). You might be able to increase this number by making a few minor configuration changes. Rerun OPTIMIZE after making the recommended changes to gauge the effect on the largest executable program size, and to determine if further savings are possible. % bytes. (this figure may vary slightly from the one reported by the MEM command). Congratulations! 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