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- ; B5CC-1.INS - BYE5 insert for CCS-2719 and SDS Z80-SIO - 07/17/85
- ;
- ; Z80-SIO and 8430 CTC timer
- ;
- ; This version is for both the CCS-2719 and Sierra Data Science S-100
- ; serial I/O boards. Note: This is an insert, not an overlay.
- ;
- ;
- ; IN ORDER TO USE THE CCS-2719 WITH THE SMART MODEM, WE MUST
- ; CHANGE THE HARDWARE SOMEWHAT. THE HEADER BLOCK ON THE 2719
- ; MUST BE TURNED OVER SO THE PORT CONFIGURATION IS FOR DTE
- ; (DATA TERMINAL EQUIPMENT). FURTHER, THE STANDARD CCS-2719
- ; PRESENTS DSR FROM THE RS-232-C TO DCD OF THE SIO. BYE5 RE-
- ; QUIRES THE ACTUAL DCD FROM PIN 8 OF THE RS-232-C, THEREFORE
- ; WE MUST REMOVE THE JUMPER IN THE HEADER BLOCK FROM PINS 1
- ; AND 15 AND ADD A WIRE FROM PIN 15 OF THE FLAT CABLE HEADER
- ; (PIN 8 OFTHE RS-232-C) TO PIN 1 OF THE HEADER BLOCK. THIS
- ; WILL PUT THE MODEM'S DCD SIGNAL TO THE the SIO'S DCD INPUT.
- ; REFER TO THE CCS-2719 SCHEMATIC IN YOUR USER'S MANUAL.
- ;
- ; - Note by Joe Wright
- ;
- ; = = = = = = = = = = = = = = = = = =
- ;
- ; 07/17/85 Written for use with BYE5 - Irv Hoff
- ;
- ; = = = = = = = = = = = = = = = = = =
- ;
- ;
- ; Select one of the following with YES or NO
- ;
- CCS EQU YES ; CCS2719 at 3.6864 MHz for Counter mode
- SIERRA EQU NO ; Sierra Data Science at 4.000 MHz
- ;
- ;
- ; Set base port for SIO & CTC chips
- ;
- IF CCS
- PORT EQU 54H ; Data port
- MDCTL1 EQU PORT+1 ; Modem satus port
- BRPORT EQU 50H ; Baud rate generator port (CTC)
- ENDIF ; CCS
- ;
- IF SIERRA
- PORT EQU 82H ; Data port
- MDCTL1 EQU PORT+1 ; Modem status port
- BRPORT EQU 89H ; Baud rate generator port (CTC)
- ENDIF ; SIERRA
- ;
- MDRCV EQU 1 ; Modem receive ready bit
- MDSND EQU 4 ; Modem send ready bit
- MDDCD EQU 8 ; Data carrier detect
- ;
- ;
- ; First byte of CTC Command:
- ;
- ; To access CTC baud rate command - Note, the CCS 2719 uses the 3.6864
- ; MHz xtal for the counter mode and the 4.000 MHz xtal for the timer
- ; mode. The SDS board uses the 4.000 MHz master clock for both.
- ;
- BDCMD1 EQU 07H ; Uses a "divide by 16" prescaler
- BDCMD2 EQU 47H ; Uses a "divide by 2" flip-flop
- ;
- ;
- ; The following assume CCS2719 oscillator at 1.8432 MHz.
- ;
- IF CCS
- BD300 EQU 52 ; 300 baud (4.000 xtal, rest 1.8432)
- BD1200 EQU 96 ; 1200 bps
- BD2400 EQU 48 ; 2400 bps
- BD9600 EQU 12 ; 9600 bps
- ENDIF ; CCS
- ;
- ;
- ; The following assume SIERRA DATA SCIENCE oscillator at 4.000 MHz.
- ;
- IF SIERRA
- BD300 EQU 52 ; 300 baud
- BD1200 EQU 104 ; 1200 bps
- BD2400 EQU 52 ; 2400 bps
- BD9600 EQU 13 ; 9600 bps
- ENDIF ; SIERRA
- ;.....
- ;
- ;
- ;-----------------------------------------------------------------------
- ;
- ; See if we still have a carrier - if not, return with the zero flag set
- ;
- MDCARCK:MVI A,10H ; Reset status
- OUT MDCTL1
- IN MDCTL1 ; Get status
- ANI MDDCD ; Check for carrier
- RET
- ;.....
- ;
- ;
- ; Disconnect and wait for an incoming call
- ;
- MDINIT: MVI A,0 ; Setup to write register 0
- OUT MDCTL1
- MVI A,18H ; Reset channel
- OUT MDCTL1
- MVI A,4 ; Setup to write register 4
- OUT MDCTL1
- MVI A,44H ; Set 16x, 1 stop bit, no parity
- OUT MDCTL1
- MVI A,3 ; Setup to write register 3
- OUT MDCTL1
- MVI A,0C1H ; 8 bits, Rx enable
- OUT MDCTL1
- MVI A,5 ; Setup to write register 5
- OUT MDCTL1
- MVI A,68H ; DTR off
- OUT MDCTL1
- PUSH B ; Save in case it's being used elsewhere
- MVI B,20 ; 2 second delay to drop any carrier
- ;
- OFFTI: CALL DELAY ; 1 second delay
- DCR B
- JNZ OFFTI ; Keep looping until finished
- POP B ; Restore 'BC'
- MVI A,5 ; Setup to write register 5
- OUT MDCTL1
- MVI A,0E8H ; Turn DTR back on
- OUT MDCTL1
- ;
- IF IMODEM ; If using an intellegent modem
- CALL IMINIT ; Go initialize it now
- ENDIF ; IMODEM
- ;
- RET
- ;.....
- ;
- ;
- ; Input a character from the modem port
- ;
- MDINP: IN PORT ; Get character
- RET
- ;.....
- ;
- ;
- ; Check the status to see if a character is available. If not, return
- ; with the zero flag set. If yes, use 0FFH to clear the flag.
- ;
- MDINST: IN MDCTL1 ; Get status
- ANI MDRCV ; Got a character
- RZ ; Return if none
- ORI 0FFH ; Otherwise set the proper flag
- RET
- ;.....
- ;
- ;
- ; Send a character to the modem
- ;
- MDOUTP: OUT PORT ; Send it
- RET
- ;.....
- ;
- ;
- ; See if the output is ready for another character
- ;
- MDOUTST:IN MDCTL1 ; Get status
- ANI MDSND ; Ready for a character?
- RET
- ;.....
- ;
- ;
- ; Reinitialize the modem and hang up the phone by dropping DTR and
- ; leaving it inactive.
- ;
- MDQUIT: IF IMODEM
- CALL IMQUIT
- ENDIF ; IMODEM
- ;
- ;
- ; Called by the main program after caller types BYE
- ;
- MDSTOP: MVI A,5 ; Setup to write register 5
- OUT MDCTL1
- MVI A,68H ; Turn off DTR until next time
- OUT MDCTL1
- RET
- ;.....
- ;
- ;
- ; The following routine sets the baudrate. BYE5 asks for the maximum
- ; speed you have available.
- ;
- SETINV: ORI 0FFH ; Make sure zero flag is not set
- RET
- ;.....
- ;
- ;
- SET300: MVI B,BD300 ; Set for 300 baud
- MVI A,BDCMD1
- JMP SETBAUD
- ;
- SET1200:MVI B,BD1200 ; Set for 1200 bps
- MVI A,BDCMD2
- JMP SETBAUD
- ;
- SET2400:MVI B,BD2400 ; Set for 2400 bps
- MVI A,BDCMD2
- ;
- SETBAUD:OUT BRPORT ; Send first byte of command
- MOV A,B ; Restore the rate
- OUT BRPORT ; Send rate
- XRA A ; Say rate is ok
- RET
- ;.....
- ;
- ; end
- ;-----------------------------------------------------------------------