|
| |
Exchange Memory Region
|
Input |
Output |
|
AX |
57h |
01h |
Error
Code |
|
AX |
|
BX |
|
|
|
|
BX |
|
CX |
|
|
|
|
CX |
|
DS:SI |
Ptr
to Source/Dest data |
|
|
DX |
Exchanges data between two memory areas. Includes exchanges
between paged and non-paged areas, or between two different
paged areas.
Notes:
* The request block is a structure with the following format:
dword region length in bytes byte 0=source in conventional
memory 1=source in expanded memory word source handle word
source offset in page or selector word source logical page
(expanded) or selector (conventional) byte 0=target in
conventional memory 1=target in expanded memory word target
handle word target offset in page or selector word target
logical page (expanded) or selector (conventional)
* Expanded memory allocated to a handle is considered to be a
linear array, starting from logical page 0 and progressing
through logical page 1, 2, ... n, n+1, ... up to the last
logical page in the handle. |