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AX = 0306h
Return:
CF clear BX:CX -> procedure to switch from real to protected mode (see #03151) SI:(E)DI -> procedure to switch from protected to real mode
Notes: 16-bit programs should jump to SI:DI, 32-bit programs should use SI:EDI. The caller must save and restore the state of the task with AX=0305h. Not supported by MS Windows 3.0 in Standard mode
See Also: AX=0305h
(Table 03151) Values to JUMP at mode-switch procedures with:. AX = new DS. CX = new ES. DX = new SS. (E)BX = new (E)SP. SI:(E)DI = new CS:(E)IP
Notes: BP/EBP is preserved across the call, but AX/EAX, BX/EBX, CX/ECX, DX/EDX, SI/ESI, and DI/EDI will be undefined; FS and GS will be 0000h. Interrupts will stay disabled during the entire mode switch if they are disabled on entry to the mode-switch procedure
Category: DOS Extenders - Int 31h - D
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