)
Values for BlockDev/IOS (VxD ID 0010h) service number:
 0000h	get version
 0001h	register device
 0002h	find INT 13 drive
 0003h	get device list
 0004h	send command
 0005h	command complete
 0006h	synchronous command
 0007h	"IOS_Register"
 0008h	"IOS_Requestor_Service"
 0009h	"IOS_Exclusive_Access"
 000Ah	"IOS_Send_Next_Command"
 000Bh	"IOS_Set_Async_Time_Out"
 000Ch	"IOS_Signal_Semaphore_No_Switch"
 000Dh	"IOSIdleStatus"
 000Eh	"IOSMapIORSToI24"
 000Fh	"IOSMapIORSToI21"
 0010h	"PrintLog"
SeeAlso: #01277,#01279