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中国DOS联盟论坛 » DOS疑难解答 & 问题讨论（解答室） » Why do I only have 19K of upper memory?? View 1,259　Replies 2

Original Poster Posted 2003-03-28 00:00　·　中国山东聊城教育网

viking

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Memory Type Total = Used + Free
---------------- ------- ------- -------
Conventional 640K 50K 590K
Upper 19K 5K 14K
Reserved 384K 384K 0K
Extended (XMS)* 15,341K 493K 14,848K
---------------- ------- ------- -------
Total memory 16,384K 932K 15,452K

Total under 1 MB 659K 55K 604K

Total Expanded (EMS) 15,680 (16,056,320 bytes
Free Expanded (EMS)* 15,088 (15,450,112 bytes

* EMM386 is using XMS memory to simulate EMS memory as needed.
Free EMS memory may change as free XMS memory changes.

Largest executable program size 590K (604,192 bytes)
Largest free upper memory block 11K (11,328 bytes)
MS-DOS is resident in the high memory area.

What settings do I need?

Floor 2 Posted 2003-03-28 00:00　·　中国广东佛山三水区电信

MYS

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You're using EMS (expanded memory), and it needs to use 64K in the reserved area for mapping. That by itself reduces UMB by 64K. Also, some other expansion cards may be occupying reserved memory. It's best to check it with DOS's MSD.

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Floor 3 Posted 2003-03-28 00:00　·　加拿大安大略省多伦多

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After I boot with my MS-DOS 7.10 boot disk (choose the second option, the UMBPCI method), I have 630K conventional memory free and a bit over 70K of UMB free:
http://newdos.yginfo.net/dosware/mdos71bd.zip

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