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- ; B5R2-1.INS - BYE5 Insert for TRS-80 2/12/16/16B - 07/17/85
- ;
- ; SIO I/O and CTC 8430 timer
- ;
- ; This version adapted for use with TRS-80 Models 2/12/16 & 16B.
- ;
- ; This works with the TRS-80 Model II & 12 with versions of CP/M 2.2
- ; except Pickles and Trout 2.2m. Will work on P&T 2.2m ONLY if running
- ; ZCPR3.
- ;
- ; NOTE: This is an insert, not an overlay.
- ;
- ;
- ; = = = = = = = = = = = = = = = = = =
- ;
- ; 07/17/85 Written to work with BYE5 - Irv Hoff
- ; 12/23/84 Written for TRS-80 Models II//16/ and 16B - Ken Brown
- ;
- ; = = = = = = = = = = = = = = = = = =
- ;
- ;
- ; Set ports for SIO & CTC chips for TRS-80 Models 2/12/16/16B
- ;
- ; The following define the port addresses to use.
- ;
- PORT EQU 0F4H ; Data port
- STPORT EQU PORT+2 ; Status/control port
- BPORT EQU 0F0H ; Baud rate port
- BPORT1 EQU BPORT+1 ; Port for TRS-80 Models 2/12/16/16B
- ;
- ;
- ; Changed BDCMD1 & BDCMD2 EQU'S for TRS-80 Models 2/12/16/16B
- ;
- BDCMD1 EQU 07H ; 110,300,600 & 1200 baud
- BDCMD2 EQU 47H ; 2400 4800 9600 baud
- ;
- ;
- ; CTC baud rate divisors
- ;
- BD300 EQU 52 ; 300 baud
- BD1200 EQU 104 ; 1200 bps
- BD2400 EQU 52 ; 2400 bps
- ;
- ;
- ;-----------------------------------------------------------------------
- ;
- ; See if we still have a carrier - if not, return with the zero flag set
- ;
- MDCARCK:MVI A,10H ; Reset status
- OUT STPORT
- IN STPORT ; Get status
- ANI 08H ; Check for data carrier
- RET
- ;.....
- ;
- ;
- ; Disconnect and wait for an incoming call
- ;
- MDINIT: MVI A,18H ; Reset channel
- OUT STPORT
- MVI A,4 ; Setup to write register 4
- OUT STPORT
- MVI A,44H ; 1 stop, 8 bits, no parity
- OUT STPORT
- MVI A,1 ; Setup to write register 1
- OUT STPORT
- MVI A,00H
- OUT STPORT
- MVI A,5 ; Setup to write register 5
- OUT STPORT
- MVI A,68H ; Clear DTR causing hangup
- OUT STPORT
- PUSH B
- MVI B,20 ; 2 second delay
- ;
- OFFTI: CALL DELAY ; 0.1 second delay
- DCR B
- JNZ OFFTI ; Keep looping until finished
- POP B ; Restore BC
- MVI A,3 ; Setup to write register 3
- OUT STPORT
- MVI A,0C1H ; Initialize receive register
- OUT STPORT
- MVI A,5 ; Setup to write register 5
- OUT STPORT
- MVI A,0EAH ; Turn on DTR so modem can answer phone
- OUT STPORT
- ;
- IF IMODEM ; If using hayes 300/1200 smartmodem
- CALL IMINIT ; Go initialize smartmodem now
- ENDIF ; Smodem
- ;
- RET ; Return
- ;.....
- ;
- ;
- ; Input a character from the modem port
- ;
- MDINP: IN PORT ; Get character
- RET ; Return
- ;.....
- ;
- ;
- ; 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 STPORT ; Get status
- ANI 01H ; Check the receive ready bit
- RZ ; Return if none
- ORI 0FFH ; Otherwise, set the proper flag
- RET ; And return
- ;.....
- ;
- ;
- ; Send a character to the modem
- ;
- MDOUTP: OUT PORT ; Send it
- RET
- ;.....
- ;
- ;
- ; See if the output is ready for another character
- ;
- MDOUTST:IN STPORT
- ANI 04H ; Check the transmit ready bit
- RET
- ;.....
- ;
- ;
- ; Reinitialize the modem and hang up the phone by dropping DTR and
- ; leaving it inactive.
- ;
- MDQUIT: IF IMODEM ; If using a smartmodem
- CALL IMQUIT ; Tell it to shut down
- ENDIF ; IMODEM
- ;
- ;
- ; Called by the main program after caller types BYE
- ;
- MDSTOP: MVI A,5 ; Setup to write register 5
- OUT STPORT
- MVI A,68H ; Clear DTR causing shutdown
- OUT STPORT
- XCHG ; Give it time to react
- XCHG
- 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 ; Load rate
- MVI A,BDCMD1 ; Get first byte of command
- JMP SETBAUD
- ;
- SET1200:MVI B,BD1200
- MVI A,BDCMD2
- JMP SETBAUD
- ;
- SET2400:MVI B,BD2400
- MVI A,BDCMD2
- ;
- SETBAUD:OUT BPORT ; Send CTC command word
- OUT BPORT1
- MOV A,B ; Get the baudrate value
- OUT BPORT ; Send rate
- OUT BPORT1
- XRA A ; Say rate is ok
- RET
- ;.....
- ;
- ; end
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