For | more | information | on |
| techniques | to | conserve |
| conventional | memory, | ||||||||||
refer | to | the |
| following |
| topics |
| in | the | documentation | that | comes with | ||||||||
your | operating |
| system: |
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| DOS=UMB, |
| DOS=HIGH,UMB | (CONFIG.SYS |
| entry) |
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| This | command | enables | the | use | of |
| upper | memory | and | loads | DOS, | ||||||||
| MSCDEX, | and | the | IDE | device | driver | in | upper |
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| memory. |
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| HIMEM.SYS | (CONFIG.SYS | entry) |
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| This | is |
| a | device | driver |
| that |
| manages | extended | memory | (RAM | |||||||
| memory | above | 1 | MB). | Windows | automatically | loads | this | device | |||||||||||
| driver. |
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| EMM386.EXE | (CONFIG.SYS | entry) |
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| This | is |
| a | device | driver |
| that |
| allows the extended memory made | ||||||||||
| available | by | HIMEM.SYS | to | be | used | as | expanded | memory. | The | ||||||||||
| MSCDEX | /E | parameter | might |
| be | used |
| in | conjunction | with this | |||||||||
| device | driver | to |
| move | the |
| cache |
| allocated by MSCDEX into this | ||||||||||
| memory, | thus | freeing some |
| conventional | memory. |
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| MEM | /C |
| /P | (use | from | DOS | prompt) |
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| This | is |
| a | useful |
| DOS | utility | that | will | display | the | current memory | |||||||
| allocation |
| in | your |
| computer |
| to | help | you | understand |
| where | device | ||||||
| drivers | and | programs | are | located. |
| To | display | the |
| MEM |
| ||||||||
| parameters |
| available, | at | the | DOS |
| prompt | type |
| mem/? |
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Enhancing performance in DOS and Windows
The following two procedures can enhance
1. Allocate more MSCDEX cache (see /M parameter for MSCDEX).
2. Allow SMARTDRV to cache
| The | CDSETUP | program | disables | the |
| cache |
| data |
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| function. | Multisession | CDs | are | not | compatible | with | the |
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| SMARTDRV | caching | method. | If | you | do | not | plan | to | use |
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| PhotoCD or | CDs, |
| you |
| can | enable | caching | by | ||||||||
| removing | the |
| /U | parameter | from | the | SMARTDRV | line | in | your | ||||||
| AUTOEXEC.BAT |
| or CONFIG.SYS | file. | This | might improve | the | ||||||||||
| performance | of |
| some | applications. | You | must | have |
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| SMARTDRV | 5.0 |
| or | later | to | cache | data. |
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Updating | the | device | driver | for |
| a |
| DOS |
| network | server | ||||||
If | you | are | using | the | drive |
| in | a | DOS | Network | server | ||||||
you | need | to | make | the | following | changes: |
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1.Add the /S parameter to the MSCDEX line in the AUTOEXEC.BAT file.
2. | Verify | that | the | MSCDEX line is | located | after | the | line | that loads | |||||
| the | network | services | (NET | START | for | IBM | PC | LAN | program). | ||||
3. | Do | one | of | the | following, | depending | on | your | operating | system: | ||||
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| If | you | are |
| using | DOS | 3.3, | be | sure | you | havePC | Local | Area |
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| Network | (LAN) | Program | Corrective | Service | Diskette |
| level | |||||
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| IP00755 | or | later | installed. |
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Part 3: Appendixes |