我在DOS下运行一个DOS游戏的时候出现了错误，初步是内存分配的问题。用mem查看了一下，显示如下信息：
Memory Type Total = Used + Free
---------------- -------- -------- --------
Conventional 640K 111K 529K
Upper 0K 0K 0K
Reserved 0K 0K 0K
Extended (XMS) 1,833,66 4,336K 1,829,32
---------------- -------- -------- --------
Total memory 1,834,30 4,447K 1,829,85
Total under 1Mb 640K 111K 529K
Total Expanded (EMS) 33,152K (33,947,648 bytes)
Free Expanded (EMS) 32,768K (33,554,432 bytes)
Total Extended (XMS) 1,833,66 (1,877,671,936 byte
Free Extended (XMS) 1,829,32 (1,873,231,872 byte
Largest executable program size 529K (541,264 bytes)
Largest free upper memory block 0K (0 bytes)
Available space in High Memory Area 5K (5,312 bytes)
MS-DOS is resident in the high memory area.
以上信息有错误，一般来说UMB应该是384KB吧？而以上显示的为零。如何解决？谢谢！
Memory Type Total = Used + Free
---------------- -------- -------- --------
Conventional 640K 111K 529K
Upper 0K 0K 0K
Reserved 0K 0K 0K
Extended (XMS) 1,833,66 4,336K 1,829,32
---------------- -------- -------- --------
Total memory 1,834,30 4,447K 1,829,85
Total under 1Mb 640K 111K 529K
Total Expanded (EMS) 33,152K (33,947,648 bytes)
Free Expanded (EMS) 32,768K (33,554,432 bytes)
Total Extended (XMS) 1,833,66 (1,877,671,936 byte
Free Extended (XMS) 1,829,32 (1,873,231,872 byte
Largest executable program size 529K (541,264 bytes)
Largest free upper memory block 0K (0 bytes)
Available space in High Memory Area 5K (5,312 bytes)
MS-DOS is resident in the high memory area.
以上信息有错误，一般来说UMB应该是384KB吧？而以上显示的为零。如何解决？谢谢！