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. - PURGE INPUT BUFFER THROWING AWAY ALL PENDING INPUT
	AH = 0Ah
	DX = port number
Return: nothing
SeeAlso: AH=09h"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=85h
                                                                                

INT 14 - Digiboard DigiCHANNEL PCIBM PC/X* - INPUT QUEUE CHECK
	AH = 0Ah
	DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AX = number of characters available in buffer
Note:	this function is also supported by the PC-MOS/386 v5.01 $serial.sys
SeeAlso: AH=09h"Digiboard",AH=0Dh"Digiboard"
                                                                                

INT 14 - MBBIOS - WRITE BUFFER                                                  
	AH = 0Ah
	CX = count
	ES:DI -> buffer (see #00338)
Return: AX = status (see #00304,#00305)
	CX = unsent character count
	DI updated
Note:	the PACCOM version of MBBIOS does not use CX or ES:DI; instead, ES
	  contains the segment of a buffer containing the packet to be sent,
	  which by default will be freed once the packet has been sent.	 Use
	  AH=0Ch"MBBIOS" to allocate the buffer.
SeeAlso: AH=01h,AH=0Bh"MBBIOS",AH=0Ch"MBBIOS",AH=19h"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."


Format of MBBIOS PACCOM buffer:
Offset	Size	Description	(Table 00338)
 00h 504 BYTEs	data area
1F8h	WORD	length of data in data area
1FAh	BYTE	flags/status
		bit 7: don't discard buffer after transmitting data
		bit 6: buffer has been transmitted
1FBh	BYTE	reserved (0) for additional flags/status
1FCh	WORD	user data
1FEh	WORD	MBBIOS-internal pointer to next buffer