| reg | value | descr |
|---|---|---|
| AH | 0x48 | |
| BX | number of memory paragraph requested |
| reg | descr |
|---|---|
| AX | Segment address of allocated memory block (MCB + 1para) error code if CF is set (see DOS Error Code) |
| BX | size in paras of the largest block of memory available if CF set, and AX = 08 (Not Enough Mem) |