Re: Extended Memory and USB2

[Patricia M Godfrey pmgodfrey@xxxxxxxx]

Paul Breeze wrote: ≪memory space that would normally be allotted to
extended memory. ≫

Extended? Or Expanded? According to the docs, XyW uses expanded memory,
and the guys at TTG several times told me it doesn't use extended. (On
the other hand, I have considerable anecdotal evidence that the
installation routine at least does use extended.) Mind you, both as far
as I can see are legal fictions in 32-bit Win. Windows sets aside a block
of memory and tells DOS apps that it's the RAM addresses they're
expecting. Open a DOS prompt and type MEM /C (if that works in the NT
flavors; it mayn't). Here's what I get on my (98SE) system:

Modules using memory below 1 MB:

 Name      Total      Conventional    Upper Memory
 -------- ----------------  ----------------  ----------------
 MSDOS    18,896  (18K)   18,896  (18K)     0  (0K)
 HIMEM    1,120  (1K)   1,120  (1K)     0  (0K)
 DBLBUFF   2,976  (3K)   2,976  (3K)     0  (0K)
 IFSHLP    2,864  (3K)   2,864  (3K)     0  (0K)
 WIN     3,696  (4K)   3,696  (4K)     0  (0K)
 vmm32    3,264  (3K)   3,264  (3K)     0  (0K)
 COMMAND   7,456  (7K)   7,456  (7K)     0  (0K)
 Free    614,832 (600K)  614,832 (600K)     0  (0K)

Memory Summary:

 Type of Memory    Total     Used     Free
 ---------------- -----------  -----------  -----------
 Conventional     655,360    40,528    614,832
 Upper            0       0       0
 Reserved          0       0       0
 Extended (XMS)   67,107,840       ?  250,433,536
 ---------------- -----------  -----------  -----------
 Total memory    67,763,200       ?  251,048,368

 Total under 1 MB   655,360    40,528    614,832

 Total Expanded (EMS)         67,108,864  (64M)
 Free Expanded (EMS)         16,777,216  (16M)
 Largest executable program size     614,816  (600K)
 Largest free upper memory block        0   (0K)
 MS-DOS is resident in the high memory area.

Look at those XMS figures: total is LESS THAN free. Also for Total
memory. And note the question marks under Used. Apparently Windoesn't
doesn't know what's being used. (This had nothing else running in the
DVM; just the DOS prompt.)

Patricia M. Godfrey
PMGodfrey@xxxxxxxx