INT 14 - SERIAL - INITIALIZE PORTIBM PC Portable (uses same BIOS as XT)
	AH = 00h
	AL = port parameters (see #00300)
	DX = port number (00h-03h) (04h-43h for Digiboard XAPCM232.SYS)
Return: AH = line status (see #00304)
	    FFh if error on Digiboard XAPCM232.SYS
	AL = modem status (see #00305)
Notes:	default handler is at F000h:E739h in IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. PCIBM PC and 100% compatible BIOSes
	since the PCjr supports a maximum of 4800 bps, attempting to set 9600
	  bps will result in 4800 bps
	various network and serial-port drivers support the standard BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly.
	  functions with interrupt-driven I/O instead of the BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly.'s polled I/O
	the 1993/04/08 Compaq system ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs. uses only the low two bits of DX
	the default setting used by DOS (MS-DOS 6, DR-DOS 7.03, PTS-DOS) when
	  (re-)initializing the serial devices is AL=A3h (2400 bps, no parity,
	  1 stop bit, 8 data bits).
SeeAlso: AH=04h"SERIAL",AH=04h"MultiDOS",AH=05h"SERIAL",AH=57h
SeeAlso: AX=8000h"ARTICOM",AH=81h"COMM-DRV",AH=82h"COURIERS",AH=8Ch
SeeAlso: MEM 0040h:0000h,PORTIBM PC Portable (uses same BIOS as XT) 03F8h"Serial"


Bitfields for serial port parameters:
Bit(s)	Description	(Table 00300)
 7-5	data rate (110,150,300,600,1200,2400,4800,9600 bps)
 4-3	parity (00 or 10 = none, 01 = odd, 11 = even)
 2	stop bits (set = 2, clear = 1)
 1-0	data bits (00 = 5, 01 = 6, 10 = 7, 11 = 8)
SeeAlso: #00302,#00307,#00308,#00309
                                                                                

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. (Fido/Opus/Seadog Standard Interface Level) - INITIALIZE
	AH = 00h
	AL = initializing parameters
	    7 - 6 - 5	   4 - 3     2	  1 - 0
	    -BAUD RATE-	   PARITY   STOP   WORD
				    BITS  LENGTH
	    000 19200 bd   00 none  0: 1  00: 5
	    001 38400 bd   01 odd   1: 2  01: 6
	    010	  300 bd   11 even	  10: 7
	    011	  600 bd		  11: 8
	    100	 1200 bd
	    101	 2400 bd
	    110	 4800 bd
	    111	 9600 bd (4800 on PCjr)
	DX = port number (0-3 or FFh if only performing non-I/O setup)
Return: AH = RS-232 status code bits (see #00301)
	AL = modem status bits
	    bit 3: always 1
	    bit 7: DCD - carrier detect
SeeAlso: #00300,AH=05h"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=81h"COMM-DRV",AH=82h"COURIERS"


Bitfields for 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. RS-232 status:
Bit(s)	Description	(Table 00301)
 0	RDA - input data is available in buffer
 1	OVRN - data has been lost
 5	THRE - room is available in output buffer
 6	TSRE - output buffer empty
                                                                                

INT 14 - Tandy 2000 - SERIAL - RESET COMM PORTIBM PC Portable (uses same BIOS as XT)
	AH = 00h
	AL = RS-232C parameters (see #00302)
	DL = port number
	DH = protocol
	    bit 0: use XON/XOFF on received data
	    bit 1: use XON/XOFF when transmitting
Return: AH = line status (see #00304)
	AL = modem status (see #00305)
Note:	this interrupt is identical to INT 53 on the Tandy 2000
SeeAlso: AH=04h"Tandy 2000",INT 53"Tandy 2000"
                                                                                

INT 14 - MBBIOS - INITIALIZE PORTIBM PC Portable (uses same BIOS as XT)
	AH = 00h
	AL = port parameters (see #00302)
	DX = port number
Return: AH = line status (see #00304)
	AL = modem status (see #00305)
Note:	MBBIOS was written by H. Roy Engehausen
SeeAlso: AH=04h"MBBIOS",AH=05h"MBBIOS",AH=09h"MBBIOS"


Bitfields for MBBIOS port parameters:
Bit(s)	Description	(Table 00302)
 7-5	data rate
	(normally 110,150,300,600,1200,2400,4800,9600 bps;
	9600,14400,19200,28800,38400,57600,115200,330400 bps
	if the high-speed option is set)
 4-3	parity (00 or 10 = none, 01 = odd, 11 = even)
 2	stop bits (set = 2, clear = 1)
 1-0	data bits (00 = 5, 01 = 6, 10 = 7, 11 = 8)
SeeAlso: #00300