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INT 21 - DOS 3.x - GET MEMORY ALLOCATION STRATEGY
|
Input |
DOS1 |
N |
DOS2 |
N |
DOS3 |
Y |
DOS5 |
Y |
Output |
|
AX |
58h |
00h |
Strategy
Code / Error Code |
AX |
|
BX |
|
|
|
|
BX |
|
CX |
|
|
|
|
CX |
|
DX |
|
|
|
|
DX |
|
ES:DI |
|
Set
if Error |
CF |
Note: The Set subfunction accepts any value in BL; 2 or greater
means last fit. the Get subfunction returns the last value
set, so programs should check whether the value is >= 2,
not just equal to 2.
Strategy Codes: 00h = First Fit, low 640K
01h = Best Fit, low 640K
02h = Last Fit, low 640K
40h = First Fit, UMBs Only
41h = Best Fit, UMBs Only
42h = Last Fit, UMBs Only
80h = First Fit, UMBs First
81h = Best Fit, UMBs First
82h = Last Fit, UMBs First
See Also 48h 49h 4Ah Memory Control Block Error Codes |