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Oakland CPM Archive
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zmodem
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zmo-ot05.zz0
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ZMO-OT05.Z80
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1989-04-27
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638 lines
; PROGRAM: ZMO-OT05.Z80
; AUTHOR: Gene Weber
; VERSION: 1.5
; DATE: 14 Sept, 1988
;-----------------------------------------------------------------------
; This overlay is set up for a Otrona Attache
;-----------------------------------------------------------------------
; 89/04/12 - Modified to ZMP v1.5 - George Conover
; 89/03/15 - Removed the beginning remarks to make the file
; smaller. If you need the remarks there are in the
; file ZMP-BLNK.Z80 - George Conover
; 89/03/14 - Modified to ZMP v1.4 - George Conover
; 88/10/29 - modified to v .03 - Gene Weber
; 88/10/16 - Modified to ZMP v1.3 - Ken Reid
; 88/10/16 - First version of this file - Gene Weber
;
; Written by -
; Ron Murray, c/o Z-Node 62, 061-9-450-0200, Perth, Western Australia.
;-----------------------------------------------------------------------
NO EQU 0
YES EQU NOT NO
;
; User-set variables
;
CLKSPD EQU 4 ; Processor clock speed in MHz
;
DEBUG EQU NO
;Set the following two equates to the drive and user area which will contain
; ZMP's .OVR files, .CFG file, .FON file and .HLP file. Set both to zero
; (null) to locate them on the drive from which ZMP was invoked.
OVERDRIVE EQU 'A' ; Drive to find overlay files on ('A'-'P')
OVERUSER EQU 0 ; User area to find files
;------------------------------------------------------------------------------
;
; NOT user-set variables
;
USERDEF EQU 0145H ; Origin of this overlay. This address
; ; may change with subsequent revisions
MSPEED EQU 05CH ; Location of current baud rate. 'was' 03CH
OVSIZE EQU 0400H ; Max size of this overlay
;
; .Z80 ; Use z80 code -Attn! uncomment to use Macro-80
; ASEG ; Absolute -Attn! same, also take out '-'
; in the over-lay name. M80 don't like it.
IF DEBUG
ORG 100H ; So you can debug it with CEBUG, ZSID,
; ; etc.
ELSE
ORG USERDEF
ENDIF ; DEBUG
;
ESC EQU 1BH
CTRLQ EQU 11H
CR EQU 0DH
LF EQU 0AH
BDOS EQU 5
;
PORT EQU 0F0H ; Attache base port (data or status)
MDCTL1 EQU PORT+1 ; Modem control port
MDDATP EQU PORT ; Modem data port
MDRCV EQU 01H ; Modem receive ready
MDSND EQU 04H ; Modem send ready bit DAV
MDTXE EQU 01H ; Modem send buffer empty, holding
; buffer empty
BAUDA EQU 57H ; CTC port/Cmd word for Otrona baudrate
;
; Jump table for the overlay: do NOT change this
;
CODEBGN EQU $
;
JUMPTAB:
JP SCRNPR ; Screen print
JP MRD ; Modem read with timeout
JP MCHIN ; Get a character from modem
JP MCHOUT ; Send a character to the modem
JP MORDY ; Test for tx buffer empty
JP MIRDY ; Test for character received
JP SNDBRK ; Send break
JP CURSADD ; Cursor addressing
JP CLS ; Clear screen
JP INVON ; Inverse video on
JP INVOFF ; Inverse video off
JP HIDE ; Hide cursor
JP SHOW ; Show cursor
JP SAVECU ; Save cursor position
JP RESCU ; Restore cursor position
JP MINT ; Service modem interrupt
JP INVEC ; Initialise interrupt vectors
JP DINVEC ; De-initialise interrupt vectors
JP MDMERR ; Test uart flags for error
JP DTRON ; Turn DTR on
JP DTROFF ; Turn DTR OFF
JP INIT ; Initialise uart
JP WAIT ; Wait seconds
JP MSWAIT ; Wait milliseconds
JP USERIN ; User-defined entry routine
JP USEROUT ; User-defined exit routine
JP GETVARS ; get system variables
JP SETPORT ; Set port (0 or 1)
;
; Spare jumps for compatibility with future versions
;
JP SPARE ; spare for later use
JP SPARE ; Spare for later use
JP SPARE ; Spare for later use
JP SPARE ; Spare for later use
JP SPARE ; Spare for later use
JP SPARE ; Spare for later use
;
;Screen print function
SCRNPR:
CALL PRINT
DB 'Zmodem v1.5 overlay for Otrona Attache '
DB ' v0.3 dated 29 October 1988',CR,LF
DB 'Over-lay & Assembly by: Gene Weber.',CR,LF
DB ' Houston, Texas.',CR,LF
DB ' Ph.# 713/449-6402',CR,LF,LF
DB '*** Print screen *** function is not supported.',CR,LF,0
SPARE:
RET ; This ret used by both scrnpr & spare
;
;
; User-defined entry routine
;
USERIN: RET
;
; User-defined exit routine
;
USEROUT:RET
;
; Get a character from the modem: return in HL
; It is not necessary to test for status
;
MCHIN: PUSH BC
;
; <-= Insert Otrona Attache code here
;
IN A,(MDDATP) ; Get the character in A
;
; <-= End of your code
;
LD L,A ; Put in HL
LD H,0
OR A ; Set/clear Z
POP BC
RET
;
;Send a character to the modem
;
MCHOUT: LD HL,2 ; Get the character
ADD HL,SP
LD A,(HL) ; In A
;
; <-= Insert Otrona Attache code here
;
PUSH BC
LD C,A
;
MCHOUT1:IN A,(MDCTL1)
AND MDSND
JR Z,MCHOUT1
LD A,C
OUT (MDDATP),A
POP BC
;
; <-= End of Otrona Attache code
;
RET ; Done
;
;Test for output ready: return TRUE (1) in HL if ok
;
MORDY: DS 0
;
; <-= Insert Otrona Attache code here
;
IN A,(MDCTL1)
AND MDTXE
JR Z,MORDYX
LD L,1
LD H,0
;
MORDYX: DS 0
;
; <-= End of Otrona Attache code
;
LD A,L ; Set/clear Z
OR A
RET
;
;Test for character at modem: return TRUE (1) in HL if so
;
MIRDY: DS 0
;
; <-= Insert Otrona Attache code here
;
IN A,(MDCTL1)
AND MDRCV
JR Z,MIRDY1
LD L,1
JR MIRDYX
;
MIRDY1: LD L,0
;
MIRDYX: LD H,00H
;
; <-= End of Otrona Attache code
;
LD A,L ; Set/clear Z
OR A
RET
;
;Send a break to the modem: leave empty if your system can't do it
;
SNDBRK: DS 0
;
; <-= Insert Otrona Attache code here
;
LD A,5
OUT (MDCTL1),A ; Send to the status port
LD A,0F8H ; DTR normal, send break tone
OUT (MDCTL1),A
;
; <-= End of Otrona Attache code
;
LD HL,300
CALL WAITHLMS ; Wait 300 milliseconds
;
; <-= Insert Otrona Attache code here
;
LD A,5 ; Restore normal, 8 bits, DTR on, etc.
OUT (MDCTL1),A
LD A,0E8H
OUT (MDCTL1),A
;
; <-= Insert Otrona Attache code here
;
RET
;
; Test UART flags for error: return TRUE (1) in HL if error
;
MDMERR: DS 0
;
; <-= Insert Otrona Attache code here
;
LD A,010H ; Register 0, reset interrupts
OUT (MDCTL1),A
IN A,(MDCTL1)
;
; <-= End of Otrona Attache code
;
LD A,L ; Set/clear Z
OR A
RET
;
; Turn DTR (and optionally RTS) ON
;
DTRON: DS 0
;
; <-= Insert Otrona Attache code here
;
LD A,05H
OUT (MDCTL1),A
LD A,0E8H
OUT (MDCTL1),A
;
; <-= End of Otrona Attache code
;
RET
;
; Turn DTR ( and RTS?) OFF
;
DTROFF: DS 0
;
; <-= Insert Otrona Attache code here
;
LD A,05H
OUT (MDCTL1),A
LD A,078H
OUT (MDCTL1),A
;
; <-= End of Otrona Attache code
;
RET
;
;Initialise the UART
;
INIT: LD HL,2 ; Get parameters
ADD HL,SP
EX DE,HL
CALL GETPARM ; In HL
LD (BRATE),HL ; Baud rate
CALL GETPARM
LD (PARITY),HL ; Parity
CALL GETPARM
LD (DATA),HL ; Data bits
CALL GETPARM
LD (STOP),HL ; Stop bits
;
; <-= Insert Otrona Attache code here
;
PUSH BC
LD A,0 ; Select register
OUT (MDCTL1),A
LD A,018H ; Throw out of mode
OUT (MDCTL1),A
LD A,04H ; Select register
OUT (MDCTL1),A
LD A,044H ; Set ASCII parameters (44=1, 4C=2 stop)
OUT (MDCTL1),A
LD A,03H ; Select register
OUT (MDCTL1),A
LD A,0C1H ; Enable receive
OUT (MDCTL1),A
LD A,05H ; Select register
OUT (MDCTL1),A
LD A,0EAH ; Enable send, 'DTR', RTS'
OUT (MDCTL1),A
;
LD A,(BRATE) ; Load default baudrate
;
CP 1 ; 300 bps
JP Z,OK300
CP 5 ; 1200 bps
JP Z,OK1200
CP 6 ; 2400 bps
JP Z,OK2400
CP 7 ; 4800bps
JP Z,OK4800
CP 8 ; 9600 bps
JP Z,OK9600
CP 9 ; 19.2k bps
JP Z,OK19200
JR SETBRX ; Not valid
;
OK300: LD A,1 ; MSPEED 300 bps value
LD B,BD300
JP LOADBD
;
OK1200: LD A,5
LD B,BD1200
JP LOADBD
;
OK2400: LD A,6
LD B,BD2400
JP LOADBD
;
OK4800: LD A,7
LD B,BD4800
JP LOADBD
;
OK9600: LD A,8
LD B,BD9600
JP LOADBD
;
OK19200:LD A,9
LD B,BD19200
;
LOADBD: LD (MSPEED),A ; Change baudrate
LD A,B ; Put Baudrate from reg B into reg A
OUT (BAUDA),A ; Combine reg A with CTC cmd word
LD A,(BRATE) ; Tell zmp it's ok
LD (MSPEED),A
;
SETBRX: POP BC
;
; <-= Insert Otrona Attache code here
XOR A
LD (MSPEED),A ; CLEAR IT
;
; <-= End of Otrona Attache code
RET
;
BD300 EQU 4
BD1200 EQU 5
BD2400 EQU 6
BD4800 EQU 8
BD9600 EQU 9
BD19200 EQU 10
; Using values below
;
RET
;
BRATE: DS 2 ; Baud rate:
; 0 = 110 baud 1 = 300 baud 2 = 450 baud
; 3 = 600 baud 4 = 710 baud 5 = 1200 baud
; 6 = 2400 baud 7 = 4800 baud 8 = 9600 baud
; 9 = 19200 baud
PARITY: DS 2 ; Parity (will be 'N', 'E' or 'O')
DATA: DS 2 ; Data bits (will be 7 or 8)
STOP: DS 2 ; Stop bits (will be 1 or 2)
;
;
; Set the port. ZMP supplies either 0 or 1 as a parameter.
;
setport:
ld hl,2 ; get port number
add hl,sp
ex de,hl
call getparm ; in HL (values are 0 and 1)
; <== Insert your own code here
; <== End of your own code
ret
;-----------------------------------------------------------------------
;
; Video terminal sequences: these are for ADM-3A: Modify as you wish
;
; Cursor addressing
;
CURSADD:LD HL,2 ; Get parameters
ADD HL,SP
EX DE,HL
CALL GETPARM ; In HL
LD (ROW),HL ; Row
CALL GETPARM
LD (COL),HL ; Column
;
; <-= Insert Otrona Attache code here,
; using values in row and column
;
CALL PRINT
DB ESC,'=',0 ; ADM-3A leadin
LD A,(ROW) ; Row first
ADD A,' ' ; Add offset
CALL COUT
LD A,(COL) ; Same for column
ADD A,' '
CALL COUT
;
; <-= end of Otrona Attache code
;
RET
;
ROW: DS 2 ; Row
COL: DS 2 ; Column
;
;Clear screen
;
CLS: CALL PRINT
DB 01AH,0
RET
;
; Inverse video on
;
INVON: CALL PRINT
DB ESC,'U&',0
RET
;
; Inverse video off
;
INVOFF: CALL PRINT
DB ESC,'U ',0
RET
;
; Turn off cursor
;
HIDE: CALL PRINT
DB ESC,'c',0
RET
;
; Turn on cursor
;
SHOW: CALL PRINT
DB ESC,'d',0
RET
;
; Save cursor position
;
SAVECU: RET
;
; Restore cursor position
;
RESCU: RET
;
;-----------------------------------------------------------------------
;
; Service modem interrupt
;
MINT: RET ; My system doesn't need this
;
; Initialise interrupt vectors
;
INVEC: RET ; Ditto
;
; De-initialise interrupt vectors
;
DINVEC: RET ; Ditto
;
;------------------- End of user-defined code --------------------------
; Do not change anything below here
;
; Modem character test for 100 ms
;
MRD: PUSH BC ; Save BC
LD BC,100 ; Set limit
;
MRD1: CALL MIRDY ; Char at modem?
JR NZ,MRD2 ; Yes, exit
LD HL,1 ; Else wait 1 ms
CALL WAITHLMS
DEC BC ; Loop till done
LD A,B
OR C
JR NZ,MRD1
LD HL,0 ; None there, result=0
XOR A
;
MRD2: POP BC
RET
;
; Inline print routine: destroys A and HL
;
PRINT: EX (SP),HL ; Get address of string
;
PLOOP: LD A,(HL) ; Get next
INC HL ; Bump pointer
OR A ; Done if zero
JR Z,PDONE
CALL COUT ; Else print
JR PLOOP ; And loop
;
PDONE: EX (SP),HL ; Restore return address
RET ; And quit
;
; Output a character in A to the console
;
COUT: PUSH BC ; Save registers
PUSH DE
PUSH HL
LD E,A ; Character to E
LD C,2
CALL BDOS ; Print it
POP HL
POP DE
POP BC
RET
;
; Wait(seconds)
;
WAIT: LD HL,2
ADD HL,SP
EX DE,HL ; Get delay size
CALL GETPARM
; ; Fall thru to...
; Wait seconds in HL
;
WAITHLS:PUSH BC ; Save BC
PUSH DE ; DE
PUSH IX ; And IX
LD IX,0 ; Then point IX to 0
; ; so we don't upset memory-mapped I/O
;
; Calculate values for loop constants. Need to have two loops to avoid
; 16-bit overflow with clock speeds above 9 MHz.
;
OUTERVAL EQU (CLKSPD / 10) + 1
;
INNERVAL EQU (6667 / OUTERVAL) * CLKSPD
;
WAIT10: LD B,OUTERVAL
;
WAIT11: LD DE,INNERVAL
;
WAIT12: BIT 0,(IX) ; Time-wasters
BIT 0,(IX)
BIT 0,(IX) ; 20 T-states each
BIT 0,(IX)
BIT 0,(IX)
BIT 0,(IX)
DEC DE
LD A,E
LD A,D
OR E
JR NZ,WAIT12 ; 150 T-states per inner loop
DJNZ WAIT11 ; Decrement outer loop
DEC HL ; Ok, decrement count in HL
LD A,H
OR L
JR NZ,WAIT10
POP IX ; Done -- restore IX
POP DE ; DE
POP BC ; And BC
RET
;
; Wait milliseconds
;
MSWAIT: LD HL,2
ADD HL,SP
EX DE,HL ; Get delay size
CALL GETPARM
;
; Wait milliseconds in HL
;
WAITHLMS:
PUSH DE
;
W1MS0: LD DE,39 * CLKSPD
;
W1MS1: DEC DE
LD A,D
OR E
JR NZ,W1MS1
DEC HL
LD A,H
OR L
JR NZ,W1MS0
POP DE
RET
;
; Get next parameter from (DE) into HL
;
GETPARM:EX DE,HL ; Get address into HL
LD E,(HL) ; Get low
INC HL
LD D,(HL) ; Then hihi
INC HL ; Bump for next
EX DE,HL ; Result in HL, address still in DE
RET
;
;Get address of user-defined variables
;
GETVARS:
LD HL,USERVARS
RET
USERVARS:
DW OVERDRIVE ; .OVR etc. drive/user
DW OVERUSER
;
IF ($ - CODEBGN) GT OVSIZE
TOOBIG: JP ERRVAL ; Overlay is too large
ENDIF
;
END