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bye5
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b5ea-3.iqs
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B5EA-3.INS
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Text File
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1986-11-30
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5KB
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203 lines
; B5EA-3.INS - Eagle IIE Series insert for BYE5 - 02/15/86
;
; Z80 SIO and CTC 8340 timer
;
; Note: This is an insert, not an overlay.
;
; This version is for the Eagle IIE Series computers using channel 'A'
; Z80 SIO. The Z80-CTC is used as the baud rate generator.
;
;
; NOTE: The Eagle does not support DTR on pin 20 or DCD on pin 8, so
; be sure you wire the modem cable like this:
;
; modem Eagle
;
; TXD 2 --> 2 RXD
; RXD 3 <-- 3 TXD
; GND 7 --- 7 GND
; DCD 8 --> 5 CTS
; DTR 20 <-- 4 RTS
;
; = = = = = = = = = = = = = = = = = =
;
; 02/15/86 Added additional code to poke Baud Rate values to High Memory
; v3 as the Eagle IIE warm boot routine always looks for a value
; in memory and re-initializes the port with these values.
; Set the value of HIMEM to your machine. The three vaules I
; have encountered are:
;
; 0DE3AH for bundled hard disk operating system (IIE/IV)
; 0E23AH for Xebec operating system (File 10 added to
; floppy system)
; 0EA3AH for floppy-only system (IIE/II)
;
; Also corrected error in the RS-232C Pin-out information for
; the Eagle IIE which uses a non-standard convention on the
; serial ports. Pins 2/3 are are reversed from the norm.
; - Ken Kosakowski
;
; 12/01/85 Fixed the LOADBD routine to output correctly, thanks to
; v2 Dennis Recla - Irv Hoff
;
; 07/17/85 Written for use with BYE5 - Irv Hoff
; v1
; = = = = = = = = = = = = = = = = = =
;
;-----------------------------------------------------------------------
;
; Note: For Port A, Data = 18H, CTC = 01H, Port B, Data = 1AH, CTC = 02H
;
PORT EQU 18H ; Data port
MDCTL1 EQU PORT+1 ; Status/control port
BRPORT EQU 01H ; Baud rate port
HIMEM EQU 0E23AH ; Location that the warm boot routine
; Peeks to re-initialize baudrate on
; Warm boot
;
BD300 EQU 47D0H ; 62400/300 (first half is CTC command)
BD1200 EQU 4734H ; 62400/1200
BD2400 EQU 471AH ; 62400/2400
;
MBD300 EQU 0734H ; 124800/300 (first half is CTC command)
MBD1200 EQU 4768H ; 124800/1200
MBD2400 EQU 4734H ; 124800/2400
;
;
;-----------------------------------------------------------------------
;
; 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 20H ; Check for data carrier
RET
;.....
;
;
; Disconnect and wait for an incoming call
;
MDINIT: MVI A,18H ; Reset channel
OUT MDCTL1
MVI A,4 ; Setup to write register 4
OUT MDCTL1
MVI A,84H ; *1 stop, 8 bits, no parity, 32x
OUT MDCTL1
MVI A,5 ; Setup to write register 5
OUT MDCTL1
MVI A,68H ; Clear RTS causing hangup
OUT MDCTL1
PUSH B ; Save in case it's being used elsewhere
MVI B,20 ; 2 seconds delay to drop any carrier
;
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 MDCTL1
MVI A,0C1H ; Initialize receive register
OUT MDCTL1
MVI A,5 ; Setup to write register 5
OUT MDCTL1
MVI A,0EAH ; Turn on RTS so modem can answer phone
OUT MDCTL1
;
IF IMODEM ; If using intelligent modem
CALL IMINIT ; Go initialize
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 01H ; Check receive ready bit
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
ANI 04H ; Check 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 MDCTL1
MVI A,68H ; Clear RTS causing shutdown
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 ; Return
;.....
;
;
SET300: LXI D,BD300 ; Get 300 bps parameters in 'HL' for CTC
LXI H,MBD300 ; Now get the parameters for high memory
JMP LOADBD ; Poke them into memory
;
SET1200:LXI D,BD1200
LXI H,MBD1200
JMP LOADBD
;
SET2400:LXI D,BD2400
LHLD MBD2400
;
LOADBD: MOV A,D ; CTC command word
OUT BRPORT
MOV A,E ; Baudrate
OUT BRPORT
;
;
; Poke the Eagle CTC code to High Memory
;
MOV A,H ; CTC command word
STA HIMEM ; Warm boot looks hear for port speed
MOV A,L ; Baudrate
STA HIMEM+1
XRA A ; Show change was satisfactory
RET
;.....
;
; end
;-----------------------------------------------------------------------