Call With
EAX: Contains the read bank to set.
EBX: Contains the VM handle (always the currently executing VM).
EDX: Contains the write bank to set.
EBP: Points to the Windows VM's Client Registers.
Return Values
Save everything that you use. CY returned means that the mini-VDD handled the call. NC returned means that the Main VDD should use a VESA call to set the bank.
Remarks
This call requests the mini-VDD to set the read/write bank passed in EAX/EDX. The mini-VDD simply needs to set the bank into hardware and return CY to the Main VDD.