GEOS SDK TechDocs
|
| 
| 
1 Design Philosophy
| 
3 Using Global Memory
The GEOS memory manager currently uses real mode memory addressing, and is designed to run on PCs with as little as 512K RAM. Typically, between 30K and 160K of that is occupied by DOS. The remaining RAM is used for the global handle table and the global heap (described below). The GEOS kernel is kept in the global heap.
Because of the constraints of real-mode memory addressing, GEOS uses memory in segments of at most 64K. Each segment may be subdivided and parceled out to fill memory requests from applications. Sometimes an application will need a seemingly contiguous section of memory which is larger than 64K; in these situations, it should use the HugeArray routines (see the VM chapter).
GEOS SDK TechDocs
|
|
| 1 Design Philosophy
| 3 Using Global Memory