

;********************************************************
;*	2651 Usart Commmand And Status port equates	*
;*	File Name: U2651.EQU				*
;*	Last Update: 2/10/83				*
;********************************************************

; usart's command registers bit equates

X_CTL		equ	01H		; Set enables Xmitter
DTR		equ	02H		; 1 forces the DTR pin low
R_CTL		equ	04H		; Set enables the Receiver
ERROR_RESET	equ	10H		; Setting this resets the error flags
RTS		equ	20H		; 1 forces the RTS pin low

; usart's status register bit equates

TXRDY		equ	01H		; Set = the Xmit buffer is empty
RXRDY		equ	02H		; Set = the Recv buffer has data
PARITY_ERR	equ	08H		; Set = parity error
OVERRUN_ERR	equ	10H		; Set = overrun error
FRAME_ERR	equ	20H		; Set = framing error
DCD		equ	40H		; Set means DCD is low
DSR		equ	80H		; Set means DSR is low


