INT E0 - REAL/32 - "DEV_MAP" - GET/SET SERIAL/PARALLEL PORTIBM PC Portable (uses same BIOS as XT) MAPPINGS CL = B8h DS:DX -> Device Map Parameter Block (DEVPB) (see #04059) Return: nothing??? may destroy SI,DI,DS Format of REAL/32 Device Map Parameter Block (DEVPB): Offset Size Description (Table 04059) 00h WORD direction (00h = get current mapping, 01h = set new mapping) 02h 4 BYTEs physical device IDs which map into LPT1 - LPT4 06h 4 BYTEs physical device IDs which map into COM1 - COM4 Note: LPT4 and COM3/COM4 are reserved on early versions of Multiuser DOS, but are supported from at least CCI Multiuser DOS v7.22 onward