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B5CC-1.INS
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2000-06-30
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6KB
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216 lines
; 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
;-----------------------------------------------------------------------