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FIG.2
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1989-05-17
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Figure 2. DOS User Memory
Address
0:0 +-----------------------------------+
| |
| |
| | DOS System Area |
| | |
| | |
v +===================================+
| Memory Control Block 1 |
+-----------------------------------+
| |
| |
| Memory Block 1 |
| |
| |
+===================================+
| Memory Control Block 2 |
+-----------------------------------+
| |
| |
| Memory Block 2 |
| |
| |
+===================================+
...
+===================================+
| Last Memory Control Block |
+-----------------------------------+
| |
| |
| Free Block (owned by DOS) |
| |
| |
+===================================+
A000:0 (640K limit)
Note: A DOS memory address consists of a segment:offset pair. The
beginning of each memory paragraph (a 16-byte memory block)
can be addressed with segment:0.