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CPM OPERATING SYSTEMS/CPM 86/CONCURRENT/CCPM-86 3.1 SOURCE/D5/SERDATA.EQU

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+
+;*****************************************************
+;                                                    *
+;        Serial  Equates                             *
+;        Last Update: 2/6/84                         *
+;*****************************************************
+
+
+INMSGS          equ     80H             ; Input queue buffer size
+UPPER_LIM	equ	INMSGS - 10 
+
+NULL		equ	0
+
+V_FLAG          equ     020H            ; Flag bias for GSX 
+SWITCH_BIAS     equ     028H            ; Flag bias for Screen Switch
+
+P_DELAY		equ	141             ; used in Tick
+DELAY_16MS	equ	1	        ; each system tick is 16 ms
+
+                                        ; used by Send_Xon, Send_Xoff in Serin
+SLAVE_PIC_MASK	equ	53H	        ; slave pic's irq mask port
+CONIN_IRQ	equ	40H	        ; console input irq bit
+
+
+                                        ; usart's command registers bit equates
+X_CTL		equ	01H
+DTR		equ	02H
+R_CTL		equ	04H
+ERROR_RESET	equ	10H
+RTS		equ	20H
+
+                                        ;usart's status register bit equates
+TXRDY		equ	01H             ;Transmit buffer is empty
+RXRDY		equ	02H             ;Receive buffer has data
+PARITY_ERR	equ	08H
+OVERRUN_ERR	equ	10H
+FRAME_ERR	equ	20H
+DCD		equ	40H             ;Set = DCD is low
+DSR             equ     80H             ;Set = DSR is low
+
+eject
+
+     ;**************************************************
+     ;                           		       *
+     ;          INPUT  QUEUE  CONTROL  STRUCTURE       *
+     ;				   		       *
+     ;**************************************************
+
+SYS_FLAG	equ	byte ptr 0		; Q's CCP/M flag number
+Q_STATE		equ	word ptr (SYS_FLAG +1)	; current state of this Q
+CMD_REG		equ	byte ptr (Q_STATE + 2)	; usarts command reg image
+UN_PC		equ	word ptr (CMD_REG +1)	; unprocessed characters
+INT_IN		equ	word ptr (UN_PC + 2)	; interrupt side index 
+PROC_OUT	equ	word ptr (INT_IN + 2)	; process side index
+U_NUMB		equ	byte ptr (PROC_OUT + 2)	; usart,s number
+U_PORTC		equ	byte ptr (U_NUMB + 1)	; usart's command port
+U_PORTS		equ	byte ptr (U_PORTC + 1)	; usart's status port
+U_PORTD		equ	byte ptr (U_PORTS + 1)	; usart's data port
+XINT_MASK	equ	byte ptr (U_PORTD +1)	; xmitters interrupt mask
+IESC_IN		equ	word ptr (XINT_MASK +1)	; input esc buff index
+OESC_IN		equ	word ptr (IESC_IN +2)	; output esc buff index
+LAST_CHAR	equ	byte ptr (OESC_IN +2)	; last char read from Q
+LAST_STAT	equ	byte ptr (LAST_CHAR +1)	; last status read from Q
+C_STATE		equ	word ptr (LAST_STAT +1)	; conin current routine/state
+P_CON		equ	byte ptr (C_STATE +2)	; physical console number
+V_CON		equ	byte ptr (P_CON +1)	; virtual console number
+ERR_CNT		equ	byte ptr (V_CON +1)	; Error reset counter
+
+ESC_BUFF	equ	byte ptr 32		; the escape buffer
+D_BUFF		equ	byte ptr 48		; the data buffer
+S_BUFF		equ	byte ptr (D_BUFF + INMSGS) ; the status buffer
+
+                                                ; bit definitions for Q_state
+IPROC_WAITING	equ	0001H
+CHAR_AVAIL	equ	0002H
+BIT8_MASK	equ	0004H
+XX_MODE		equ	0010H
+DTR_MODE	equ	0020H
+RTS_MODE	equ	0040H
+SENDER_STOPPED	equ	0080H
+SWITCH_PEND     equ     0100H
+
+eject
+
+           ;************************************************
+           ;					           *
+           ;          OUTPUT  QUEUE  CONTROL  STRUCTURE    *
+           ;						   *
+           ;************************************************
+
+
+OFLAGN		equ	byte ptr 0	; CCP/M's flag number
+OFLAG		equ	byte ptr 1	; I/O system bit flags
+OMSGCNT		equ	word ptr 2	; Number of chars in Q
+OMSGOUT		equ	word ptr 4	; current output position in Q
+OIOPORT		equ	byte ptr 6	; Output data port address
+OSTPORT		equ	byte ptr 7	; Output Status port address
+OUSART		equ	byte ptr 8	; Output Usart number
+OESC_CNT	equ	byte ptr 9	; chars since last escape
+O_BIT_MASK	equ	byte ptr 10	; USART's interrupt bit position
+CUR_VCON	equ	byte ptr 11	; Current Vcon on this Pcon
+XMIT_MASK	equ	byte ptr 13	; bit(s) used as a Xmit ready mask
+DSR_BIT		equ	byte ptr 14	; bit used by usart to reflect the
+					; status of the USARTs DSR pin.
+OBUFFER		equ	byte ptr 16	; the Q starts here
+
+ONMSGS		equ	      0080h     ; size of the output Q buffer
+OESC_MAX        equ               4     ; maximum # char's in esc sequence
+                                        ; (for VT-52)
+
+
+                                        ; Bit definitions for Queue State field
+XON_XOFF_MODE	EQU	20H		; If set, the Queue system will respect
+					; Xon/Xoff protocol.
+XOFF_PENDING	EQU	10H		; If set,the USART we're sending chars
+					; to wants us to stop.
+RTS_PROT	EQU	80H		; If set, the Queue system will recognize
+					; the DSR pin on the USART.
+PROC_WAITING	equ	01H		; If set,a process is waiting for
+					; room in this Queue.
+
+NO_SELECT	equ	0ffH		; Put into the USART NUMBER field of 
+                                        ; the Q Control structure (OUSART) when:
+                                        ; we do not want a usart select call
+					; made before a usart is accessed for
+					; command, status, or data.
+
+
+
+
+                                ; IN_XMT_MASK values for each of the USARTS
+SS_U	equ	0FFH		; system support boards USART
+US_0	equ	01H		; Interfacer 3 USART 0
+US_1	equ	02H		; Interfacer 3 USART 1
+US_2	equ	04H		; Interfacer 3 USART 2
+US_3	equ	08H		; Interfacer 3 USART 3
+US_4	equ	10H		; Interfacer 3 USART 4
+US_5	equ	20H		; Interfacer 3 USART 5
+US_6	equ	40H		; Interfacer 3 USART 6
+US_7	equ	80H		; Interfacer 3 USART 7
+
+
+