INT 14 - SERIAL - EXTENDED COMMUNICATION PORTIBM PC Portable (uses same BIOS as XT) CONTROL (CONVERTIBLE,PSIBM PS/2, any model)
	AH = 05h
	AL = function
	    00h read modem control register
	      Return: BL = modem control register (see #00334)
		      AH = status
	    01h write modem control register
	      BL = modem control register (see #00334)
	      Return: AX = status
	DX = port number
Note:	also supported by ArtiCom
SeeAlso: AH=00h,AH=1Fh,AX=8000h"ARTICOM",AH=FBh


Bitfields for modem control register:
Bit(s)	Description	(Table 00334)
 0	data terminal ready
 1	request to send
 2	OUT1
 3	OUT2
 4	LOOP
 5-7	reserved
                                                                                

INT 14 - FOSSIL(Fido/Opus/Seadog Standard Interface Layer)  A standardized API for performing serial I/O, originally used by the Fido and Opus bulletin- board software and Seadog bulletin-board mailer, but now in wider use. - DEINITIALIZE DRIVER
	AH = 05h
	DX = port number
Return: none
	DTR is not affected
SeeAlso: AH=00h,AH=04h"FOSSIL(Fido/Opus/Seadog Standard Interface Layer)  A standardized API for performing serial I/O, originally used by the Fido and Opus bulletin- board software and Seadog bulletin-board mailer, but now in wider use.",AH=1Dh,AH=8Dh
                                                                                

INT 14 - MultiDOS Plus IODRV - READ CHARACTER FROM PORTIBM PC Portable (uses same BIOS as XT)
	AH = 05h
	AL = timeout in seconds (00h = never)
Return: AL = status
	    00h successful
		AH = character read
	    01h read error
	    02h timed out
	    other modem status (CTS, DSR) changed
Note:	the port number is stored at offset BEh in the Task Control Block
SeeAlso: AH=02h,AH=04h"MultiDOS",AH=06h"MultiDOS",AH=22h"MultiDOS"
SeeAlso: INT 15/AH=13h"MultiDOS"
                                                                                

INT 14 - Digiboard DigiCHANNEL PCIBM PC/X* - CHANGE PROTOCOL
	AH = 05h
	AL = protocol (see #00335)
	BH = new XOFF character (00h = current)
	BL = new XON character (00h = current)
	DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
	    00h successful
	    FFh error
SeeAlso: AH=04h"Digiboard"


Bitfields for Digiboard protocol:
Bit(s)	Description	(Table 00335)
 7-4	unused
 3	RTS/CTS
 2	DSR
 1,0	XON/XOFF
                                                                                

INT 14 - MBBIOS - DROP DTR AND RTS                                              
	AH = 05h
	DX = port number
Return: none
SeeAlso: AH=00h"MBBIOS",AH=06h"MBBIOS",AH=06h"FOSSIL(Fido/Opus/Seadog Standard Interface Layer)  A standardized API for performing serial I/O, originally used by the Fido and Opus bulletin- board software and Seadog bulletin-board mailer, but now in wider use."
                                                                                

INT 14 - PC-MOS/386 v5.01 $serial.sys v5.04 - CHANGE PORTIBM PC Portable (uses same BIOS as XT) PROTOCOL
	AH = 05h
	AL = new port protocol (see #00336)
	BH = new XOFF character
	BL = new XON character
	DX = port number
Return: AH = FFh if invalid protocol
SeeAlso: AH=00h,AH=04h"SERIAL",AH=06h"PC-MOS"


Bitfields for PC-MOS/386 serial port protocol:
Bit(s)	Description	(Table 00336)
 7	set to enable/disable CD monitoring, clear to set protocol
---bit 7 set---
 4	CD monitoring enabled
 5	automatic restart enabled
---bit 7 clear---
 0	receive XON/XOFF
 1	transmit XON/XOFF
 2	DTR/DSR
 3	RTS/CTS