【 Weak current College 】 DOS command in Visual FoxPro (8)

(5) view the current memory state MEM command

1 function: displays the current memory usage

2 types: external commands

3 formats: MEM [/C] [/F] [/M]

4 instructions for use:

(1) choose the/C parameter lists into conventional memory and the file of the CMB length and also memory space usage and most free space;

(2) choose the/F parameter lists current conventional memory remaining byte size and UMB available area and size;

(3) use/M parameter displays the module uses memory to address, size and nature of the module;

(4) selects the/P parameter to specify the output more than one screen, pause for a user to view.

(6) MSD display system information command

1: display the system hardware and operating system.

2 types: external commands

3 formats: MSD [/S]

4 instructions for use:

(1) use the/i parameter, does not detect hardware;

(2) choose the/B parameter, start MSD in black and white;

(3) choose the/S parameter, the system displays a concise report.

IX. the dos = high [| low [umb | noumb]]

Dos = high, umb is dos itself into high memory (high) and management of upper memory (umb).

Noumb no management host memory.

In write dos = umb high and should be loaded before himem.sys device =

To the program or driver into upper memory, you must use the dos = umb, province out of most of the conventional memory.

Can be anywhere in the config.sys to write on the dos = high, umb if display hmanotavoiable or loaddownlow indicates that you cannot use the upper memory.

X. doskey records previously struck DOS commands, you can use F7 to display, use "↑ ↓ to select, use F9 to enter the

Select the order number.

Doskey/restall reload once the previous command line undo.

Doskey/history display memory all the commands, you can ">" display to another file, the abbreviation "/H".

Cls is hammer doskeydir = into dir is equivalent to the cls.

Doskey macros to display all/the macro definitions, you can use ">" to redefine it to a file, can be abbreviated "/M".

Doskeydir = dir can be revoked on the macro definition.

doskeyp=dir$tdir*.exe/p$tdirc:\t$tdirc:\t$*

$ T is a command specifier, but the $ * is a command terminator

Doskey/insert (overstrike)? in the re-enter the command, modify the old command is inserted or cover

Cover status (default).

11, emm386.exe

Provides extended memory management that enables applications like to use conventional memory as to be able to use it.

Common usage in the config.sys

device=c:\dos\himem.sys

device=c:\dos\emm386.exeram

D = 64 to DMA memory quantity is set to 64 k

Noems provides upper memory access, but does not provide access to extended memory.

It should be noted that on Windows it is better not to use it, because windows has managed to extend memory

Program-should be used in Windows Explorer.

12. fc/fc command bdt.datdt2.dat > b (for binary comparison)

Compares two files, generally used as an access schedule, modify the game store file.

The actual code location should be 0100 as: 000005E4: 0067

Actual debug-e modifications should be 0100 i.e. 000006E4: 0067

Followed by the redirection file "> P" comparison results can be output to the p file.

13. format/q/u/s/n: sectors/f: size/c

/Q parameter: quick format, only scan the file allocation table and the root zone, only the formatting of the disk.

Should be used to ensure that the format did not increase after the new bad road.

/U parameter: unconditional format, and do not save the information on the original disk, you can prevent the unformat ".

/S parameters: formatted as the system disk, you can also use the sys command.

/F: sizesize can 160180320360720120014402800

/N: sectorn can be 1Format for single-sided disc, capacity 160k180k

For 4 to 5 inch high density disk drive formatted 360k

Can be 8 to 5 inch high density drive eight sector format.

/C retest bad sectors, the default time if a sector marked as "bad", later format without logging in from new

Discussion, the only tag, use the/C "is available from the new test.

14, unformat command

On the format format, and not use the/u parameter of the command works, you can use it to repair the damage already

Bad hard disk partition table, but the network disk do not work.

unformatdrive:[/l][/test]

/L displays each discovered by unformat files and subdirectories, without this switch, displays only those

Fragmentation of files and subdirectories, you can use ctrl + s to pause, press any key to continue.

/Test only a test, not to the actual repair work, for the simulation process.

/P side test side printing.

Note: this method does not guarantee repair all files, and in particular the format and then added a data disk.

The recovered files are stored in a subdirectory subdir1....2....3, etc.

15. interlnk syntax interlnkg = e, it can through the serial port or parallel port to communicate between two machines.

On the server-side e drive mapped to the client's g drive, later on the client, all on the g

Operation means that access to the server, remove the mapped alternatives to interlnkg =

Separate input and displays all the interlnk maps.

Note: interlnk must load the interlnk.exe device driver before you can use.

The drive letter and config. Sys set number in lastdrv.exe. can make a for a

-To 25-pin, plug the other end to 9-pin serial cable connection mode to achieve, as follows:

5-72-15

3-23-13

7-44-12

6-65-10

3-36-11

8-515-2

4-2013-3

9-pin to 25-pin 12-4

10-5

11-6

25-25

25-pin to 25-pin