%HEADER(SYSTEM TICKER INTERR,NONE,NONE,NONE,
;THE PHYSICAL TIMER 1 IS USED AS THE SYSTEM TICKER. WHEN A TICK
;OCCURS, SYS CHECKS TO SEE WHETHER IT NEEDS TO HANDLE THE INTERFACE
;BETWEEN THE MODEM & THE DTE.
;ALSO THIS ROUTINE ONLY HANDLE THE INTERFACE BETWEEN MODEM & DTE, THE HANDLING
;BETWEEN MODEM & PHONE LINE SIDE IS DONE BY SCT & SCR (XSMIT & RCV) CLOCKS
;ALSO NOTE THAT THE TIME CONSTANT FOR THE TIMER SHOULD BE INITIALIZED AT
;POWER UP TO THE RIGHT BAUD RATE OF 1200 OR 300
;NOTE THAT THIS IS ONLY FOR ASYN MODE
;
)
;
TYM_INT:PUSH	ACC	;SAVE THE ACC BECAUSE IT WILL BE USED THRU
	PUSH	PSW		;SAVE THE REG BNK INFO
	JB	DT_BIT,DIAL_CH	;DIAL TONE DETECT ROUTINE
;***	JB	BBB_FLG,TTT1
	JNB	B212_FLG,GO_103 ; BRANCH IF 103 MODE
TTT1:	MOV	C,TXD_PIP	;PIPELINE TO SYN XSMIT WITH TICKER
	MOV	RCVD,C
	MOV	C,DTXD		;READ BIT ASAP TO MAINTAIN SYN
	MOV	DRXD_BIT,C	;STORE IT
				;AND FALL THROUGH TO RCV 
	JMP	RCV
;
$EJECT