UMB (Upper Memory Blocks) . , , ROM BIOS ROM.
EMS (panded Memory Specification), Lotus Development, Intel Microsoft ( LIM-). 640 .
() . UMB, RGM BIOS, 64- "", . "(TM). , "" ( 1 ), "" (. . 2).
i8088 "" () . , i80286 .
(extended)
, l80286 24- , 16 , i80386/486 - 4 .
Expanded- | |||||
HMA | - | ||||
1024 K | 10000h | ||||
ROM BIOS | ROM BIOS | ||||
960 K | F000 h | ||||
ROM BIOS | |||||
896 K | E000 h | " EMS " | |||
... ... | |||||
Hard Disk ROM BIOS | I/O ROM BIOS | ||||
C800 h | |||||
784 K | EGA/VGA ROM BIOS | C000 h | |||
768 K | CGA | ||||
736 K | B000 h | ||||
EGA/VGA | |||||
... ... ... | A000 h | M.SYS | |||
TSR- | |||||
DOS | DOS | ||||
0 K | |||||
. 1 | . 2 |
() , , , . DOS , . , - .
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, . . , , . DOS- . - VDISK, DOS, 3.0. VDISK DOS , . OS/2 , . , , OS/2 DOS, 640 .
.
. . - ( ), : SRAM : DRAM (FPM DRAM, EDO DRAM, SDRAM, Rambus DRAM, SDRAM II.) , . .
, SRAM , DRAM , SRAM , , .
SDRAM - . , . Double Data Rate SDRAM, SDRAM II ( ) 200 , SDRAM.
SLDRAM 400 . , , DRAM. , .
1 SLDRAM 400 , 600 . 400 / : , , - , .
, , , ( ). , , .
, , . , , .
:
1. .. . 1991
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2. .. 1990.
3. .. , .. , .. 1991.
4. 10 1998