INT E0 - DR Multiuser DOS - "A_CONTROL" - GET/SET AUX CONTROL PARAMETERS CL = B1h DS:DX -> AUX device control block (see #04056) Return: AX = status 0000h successful control block updated FFFFh failed CX = error code Note: also supported by REAL/32 SeeAlso: INT E0/CL=B0h,INT E0/CL=B2h Format of DR Multiuser DOS AUX device control block: Offset Size Description (Table 04056) 00h BYTE function (00h get, 01h set) 01h BYTE DTR state (00h low, 01h high, FFh unknown/don't change) 02h BYTE RTS state (00h low, 01h high, FFh unknown/don't change) 03h BYTE DSR state (00h low, 01h high, FFh unknown/don't change) 04h BYTE CTS state (00h low, 01h high, FFh unknown/don't change) 05h BYTE DCD state (00h low, 01h high, FFh unknown/don't change) 06h BYTE RI state (00h inactive, 01h active, FFh unknown/don't change)