This is an old revision of the document!
Note: This API calls are shared between DOS and Win16 personality.
DOSSHELL is a stripped down version of 16-bit Windows. Some APIs shared and same. DOSSHELL uses older version of API, but Win16 has more advanced APIs.
INT 2FH, AH=4BH
| SI | Description | Version |
| 1 | BUILD CALLOUT CHAIN | ? |
| 2 | INSTALLATION CHECK | ? |
| 3 | ALLOCATE SWITCHER ID | ? |
| 4 | FREE SWITCHER ID | ? |
| 5 | IDENTIFY INSTANCE DATA | ? |
| 80H | RESET INTERNAL VARIABLES | WSWAP.EXE |
Note: This API implemented by DOSSWAP.EXE under DOS and by WINOLDAP.MOD under Windows
