title 'M7-C1670 (MDM) 1670 or HAYES overlay for C128 31 Oct 85'
; M7-C1670.ASM -- Commodore 128 overlay file for MDM7xx.
;
; overlay setup by Von Ertwine for C128 using 1670 modem
; or the 1011A (RS232 converter)
; 10/31/85
;
; build new system by using to following:
;
; MAC M7-C1670 $pz-s
; MLOAD MDM7x0.com=MDM7x0.COM,M7-C1670.HEX
;
; = = = = = = = = = = = = = = = = = =
page
$*MACRO ; only show code produced by MAC not MACRO expansion
;
eom equ 00h ; end of message
bell equ 07h ; bell
lf equ 0Ah ; linefeed
cr equ 0Dh ; carriage return
esc equ 1Bh ; escape
no equ 0
yes equ not(no)
page
;
; C128 info
;
dev$no: equ 6
XxD$config: equ 0fd4Eh
; bit 7 0=no parity 1=parity
; bit 6 0=mark/space 1=odd/even
; bit 5 0=space/even 1=mark/odd
; bit 1 0=1 stop bit 1=2 stop bits
; bit 0 0=7 data bits 1=8 data bits
RS232$status: equ XxD$config+1
; bit 7 1=send data, 0=no data
; bit 6 1=sending data now
; bit 5 1=recv que active
; bit 4 1=parity error
; bit 3 1=framing error
; bit 2 not used
; bit 1 receiving data now
; bit 0 data byte ready
xmit$data: equ RS232$status+1
recv$data: equ xmit$data+1
;
MODRCVB: EQU 01H ; bit to test for receive
MODRCVR: EQU 01H ; value when receive ready
MODSNDB: EQU 80H ; bit to test for send
MODSNDR: EQU 00H ; value when send ready
data$port$a equ 0DD00h
; bit 2 TxD Data (output)
data$port$b equ data$port$a+1
data$port$b$dir equ data$port$b+2
; bit 7 Data Set Ready (input)
; bit 6 Clear to Send (input)
; bit 5 Place Phone On Hook (active low output)
; bit 4 Carrier Detect (active low input)
; bit 3 Ring Indicator (active low input)
; bit 2 Data Terminal Ready (active hi output)
; bit 1 Request to Send (active hi output)
; bit 0 Received Data (input)
page
;
setb macro ?N,?R
db 0cbh,?N*8+?R+0C0h
endm
res macro ?N,?R
db 0cbh,?N*8+?R+80h
endm
@chk macro ?DD
if (?DD GT 7Fh) and (?DD LT 0FF80h)
'Displacement Error'
endif
endm
jr macro ?N
db 18h,?N-$-1
@chk ?N-$
endm
jrz macro ?N
db 28h,?N-$-1
@chk ?N-$
endm
jrnz macro ?N
db 20h,?N-$-1
@chk ?N-$
endm
jrc macro ?N
db 38h,?N-$-1
@chk ?N-$
endm
jrnc macro ?N
db 30h,?N-$-1
@chk ?N-$
endm
inp macro ?R
db 0EDh,?R*8+40h
endm
outp macro ?R
db 0EDh,?R*8+41h
endm
page
ORG 100H
DS 3 ;(for "JMP START" instruction)
;
PMMIMODEM: DB NO ;yes=PMMI S-100 Modem 103H
SMARTMODEM: DB yes ;yes=HAYES Smartmodem, no=non-PMMI 104H
TOUCHPULSE: DB 'T' ;T=touch, P=pulse (Smartmodem-only) 105H
CLOCK: DB 11 ;clock speed in MHz x10, 25.5 MHz max. 106H
;20=2 MHh, 37=3.68 MHz, 40=4 MHz, etc.
MSPEED: DB 5 ;0=110 1=300 2=450 3=600 4=710 5=1200 107H
;6=2400 7=4800 8=9600 9=19200 default
BYTDLY: DB 5 ;0=0 delay 1=10ms 5=50 ms - 9=90 ms 108H
;default time to send character in ter-
;minal mode file transfer for slow BBS.
CRDLY: DB 5 ;0=0 delay 1=100 ms 5=500 ms - 9=900 ms 109H
;default time for extra wait after CRLF
;in terminal mode file transfer
NOOFCOL: DB 5 ;number of DIR columns shown 10AH
SETUPTST: DB YES ;yes=user-added Setup routine 10BH
SCRNTEST: DB yes ;Cursor control routine 10CH
ACKNAK: DB YES ;yes=resend a record after any non-ACK 10DH
;no=resend a record after a valid NAK
BAKUPBYTE: DB yes ;yes=change any file same name to .BAK 10EH
CRCDFLT: DB YES ;yes=default to CRC checking 10FH
TOGGLECRC: DB YES ;yes=allow toggling of CRC to Checksum 110H
CONVBKSP: DB no ;yes=convert backspace to rub 111H
TOGGLEBK: DB YES ;yes=allow toggling of bksp to rub 112H
ADDLF: DB YES ;no=no LF after CR to send file in 113H
;terminal mode (added by remote echo)
TOGGLELF: DB YES ;yes=allow toggling of LF after CR 114H
TRANLOGON: DB YES ;yes=allow transmission of logon 115H
;write logon sequence at location LOGON
SAVCCP: DB no ;yes=do not overwrite CCP 116H
LOCONEXTCHR: DB NO ;yes=local command if EXTCHR precedes 117H
;no=external command if EXTCHR precedes
TOGGLELOC: DB YES ;yes=allow toggling of LOCONEXTCHR 118H
LSTTST: DB no ;yes=printer available on printer port 119H
XOFFTST: DB YES ;yes=check for XOFF from remote while 11AH
;sending a file in terminal mode
XONWAIT: DB NO ;yes=wait for XON after CR while 11BH
;sending a file in terminal mode
TOGXOFF: DB YES ;yes=allow toggling of XOFF checking 11CH
IGNORCTL: DB no ;yes=CTL-chars above ^M not displayed 11DH
EXTRA1: DB 0 ;for future expansion 11EH
EXTRA2: DB 0 ;for future expansion 11FH
BRKCHR: DB 'V'-40H ;^V(^@) = Send a 300 ms. break tone 120H
NOCONNCT: DB 'N'-40H ;^N = Disconnect from the phone line 121H
LOGCHR: DB 'L'-40H ;^L = Send logon 122H
LSTCHR: DB 'P'-40H ;^P = Toggle printer 123H
UNSAVE: DB 'R'-40H ;^R = Close input text buffer 124H
TRANCHR: DB 'T'-40H ;^T = Transmit file to remote 125H
SAVECHR: DB 'Y'-40H ;^Y = Open input text buffer 126H
EXTCHR: DB 'O'-40H ;^O(^^) = Send next character 127H
;
;
DS 2 ; used by PMMI 128H
IN$MODCTL1: ; get the status bits 12AH
lda RS232$status
ret
;
; TABLE OF BAUDRATE PARAMETERS
;
BAUD$TABLE:
db 0 ; 0 110 (not used)
db 6 ; 1 300
db 0 ; 2 450 (not used)
db 7 ; 3 600
db 0 ; 4 710 (not used)
db 8 ; 5 1200
;
;
;
OUT$MODDATP: ;out modem data port 134H
sta xmit$data
push h
lxi h,RS232$status
jmp out$c128$cont
IN$MODDATP: ;in modem data port 13EH
lda recv$data
push h
lxi h,RS232$status
jmp in$c128$cont
ANI$MODRCVB: ANI MODRCVB ! RET ;bit to test for receive ready 148H
CPI$MODRCVR: CPI MODRCVR ! RET ;value of receive bit when rdy 14BH
ANI$MODSNDB: ANI MODSNDB ! RET ;bit to test for send ready 14EH
CPI$MODSNDR: CPI MODSNDR ! RET ;value of send bit when ready 151H
; PMMI Modem Vectors (not used by C128)
; DS 6 ; 154H
;
; used for C128 (no PMMI modem) (6 bytes)
;
out$c128$cont: ; 154H
setb 7,m
db 21h ; LXI H,(res 0,m)
;
in$c128$cont: ; 157H
res 0,m
pop h
OUT$MODCTL1: ret ! nop ! nop ;out modem control port 15AH
OUT$MODCTL2: ret ! nop ! nop ;out modem status port 15DH
;
LOGONPTR: DW LOGON ;for user message. 160H
jmp$dial ds 3 ; 162H
jmp$disconnect ds 3 ; 165H
JMP$GOODBYE: JMP GOODBYE ; 168H
JMP$INITMOD: JMP INITMOD ;go to user written routine 16BH
RET ! NOP ! NOP ;(by-passes PMMI routine) 16EH
RET ! NOP ! NOP ;(by-passes PMMI routine) 171H
RET ! NOP ! NOP ;(by-passes PMMI routine) 174H
JMP$SETUPR: JMP SETUPR ; 177H
JMP$SPCLMENU: JMP SPCLMENU ; 17AH
JMP$SYSVER: JMP SYSVER ; 17DH
JMP$BREAK: JMP SENDBRK ; 180H
;
;
; Do not change the following six lines.
;
JMP$ILPRT: DS 3 ; 183H
JMP$INBUF: DS 3 ; 186H
JMP$INLNCOMP: DS 3 ; 189H
JMP$INMODEM DS 3 ; 18CH
JMP$NXTSCRN: DS 3 ; 18FH
JMP$TIMER: DS 3 ; 192H
;
;
; Clear sequences -- CLREOS is clear to end of screen, CLRSCRN is clear
; entire screen. Last entry must be 0. Any other 0's act as NOP's.
;
CLREOS:
CALL JMP$ILPRT ; 195H
DB esc,'Y',eom
SPCLMENU:
ret
db 0,0 ; 19DH
;
CLRSCRN:
CALL JMP$ILPRT ; 19EH
DB 'Z'-40h,eom
ret
db 0,0,0 ; 1A6H
;
;
;
SYSVER:
CALL JMP$ILPRT ; 1A7H
DB 'C-128 Ver. for 1670 or 1011A ',cr,lf,eom
RET
;.....
;
;
;-----------------------------------------------------------------------
;
; NOTE: You can change the SYSVER message to be longer or shorter. The
; end of your last routine should terminate by 0400H (601 bytes
; available after start of SYSVER) if using the Hayes Smartmodem
; or by address 0C00H (2659 bytes) otherwise.
;
;-----------------------------------------------------------------------
;
;.....
;
;
; C128 initialization -- set baudrate.
;
INITMOD:
mvi a,1 ; set default to 8 bits no parity
sta XxD$config
call set$default ; set default to 1200 baud
lxi b,data$port$b$dir
mvi a,6h
outp a
mvi c,low(data$port$b)
inp a
ori 6 ; set DTR bit (active hi)
outp a
ret
;
; This routine sends a 300 ms. break tone and sets DTR low for the same
; length of time to disconnect some modems such as the Bell 212A, etc.
;
GOODBYE: ; TURN OFF DTR
push b
lxi b,data$port$b
inp a
ani not(6) ; clear DTR and CTS bits
outp a
call sendbrk ; send 300ms break
inp a
ori 6 ; set DTR and CTS bits
outp a
pop b
mvi a,6 ; set BAUD RATE back to 300
jmp reset$baud ; ..so the system runs faster
; call/ret
;
;
; This routine allows a 300 ms. break tone to be sent to reset some
; time-shar computers.
;
SENDBRK:
di ; system will run faster without
push b ; ..interrupts
lxi b,data$port$a
inp a
ani 0FBh ; send a break tone will be cleared
outp a ; ..when interrupts turned on
mvi b,3 ; WAIT at least 300 MS.
call jmp$timer ; ..(system running fast)
pop b
ei ; re-enable interrupts. will
ret ; ..clear break.
;
; Setup routine to allow changing modem speed with the SET command.
;
SETUPR:
CALL JMP$ILPRT ; the 1011A is an RS232 card
DB 'Device Type (1670,1011A) ',0
call read$buffer
CALL JMP$INLNCOMP ; compare to BAUDBUF+2
DB '1011',0
jnc set$1011 ; Cy=0 if match
CALL JMP$INLNCOMP ; compare to BAUDBUF+2
DB '1670',0
jrc setupr
set$T$P:
call JMP$ILPRT
db 'Touch or Pulse (T,P) ',0
call read$buffer
CALL JMP$INLNCOMP ; compare to BAUDBUF+2
DB 'T',0
lxi h,'T'*256+YES
jrnc set$rate
CALL JMP$INLNCOMP ; compare to BAUDBUF+2
DB 'P',0
jrc set$T$P
set$pluse:
lxi h,'P'*256+YES
set$rate:
shld SMARTMODEM ; L=smartmodem, H=touch/pluse
mvi a,1
sta XxD$config ; set 8 bits no parity
set$rate$loop:
CALL JMP$ILPRT
DB 'Baud Rate (300,1200) ',0
call read$buffer
CALL JMP$INLNCOMP ; compare to BAUDBUF+2
DB '300',0
lxi h,17+100h ; clock=1.7, mspeed=1
JRNC set$baud ;
CALL JMP$INLNCOMP
DB '600',0
lxi h,15+300h ; clock=1.5, mspeed=3
JRNC set$baud
CALL JMP$INLNCOMP
DB '1200',0
JRC set$rate$loop
set$default:
lxi h,11+500h ; clock=1.1, mspeed=5
;
set$baud:
shld CLOCK ; L=CLOCK, H=MSPEED
mov e,h
MVI D,0
LXI H,BAUD$TABLE
DAD D
MOV A,M ; get BAUD RATE byte
reset$baud:
push psw
mvi e,3ch ; offset to jmp devtbl
call vector$1 ; rets HL=char device table start
lxi d,dev$no*8+7 ; offset to RS232 baud rate
dad d ; point to RS232 baud rate byte
pop psw
mov m,a ; change baud rate
set$1011:
lxi h,'P'*256+NO
call set$rate
set$num$bits:
CALL JMP$ILPRT
DB 'Number Bits (7,8) ',0
call read$buffer
CALL JMP$INLNCOMP ; compare to BAUDBUF+2
DB '7',0
mvi l,0
JRNC set$7 ; MATCH found
CALL JMP$INLNCOMP ; compare to BAUDBUF+2
DB '8',0
JRC set$num$bits ; wait for valid input
inr l ; L=1
set$7:
bad$parity:
CALL JMP$ILPRT
DB 'Parity (None,Odd,Even,Mark,Space) ',0
call read$buffer
CALL JMP$INLNCOMP ; compare to BAUDBUF+2
DB 'N',0
mvi a,00000000b
JRNC set$parity ;
CALL JMP$INLNCOMP ; compare to BAUDBUF+2
DB 'O',0
mvi a,11100000b
JRNC set$parity ;
CALL JMP$INLNCOMP ; compare to BAUDBUF+2
DB 'E',0
mvi a,11000000b
JRNC set$parity ;
CALL JMP$INLNCOMP ; compare to BAUDBUF+2
DB 'M',0
mvi a,10100000b
JRNC set$parity ;
CALL JMP$INLNCOMP ; compare to BAUDBUF+2
DB 'S',0
JRC bad$parity ;
mvi a,10000000b
set$parity:
ora l ; add in the number of bits
sta XxD$config
ret
read$buffer:
LXI D,BAUDBUF ; point to new input buffer
CALL JMP$INBUF
inx d
inx d
ret
;
;
;
BAUDBUF:
DB 10,0
DS 10
; You can put in a message at this location which can be called up with
; CTL-O if TRANLOGON has been set TRUE. You can put in several lines if
; desired. End with a 0.
;
;
LOGON:
DB ' C128 running MDM under CP/M 3.0 ',CR,LF,0
;
;
;
; NOTE: MUST TERMINATE PRIOR TO 0400H (with Smartmodem)
; 0C00H (without Smartmodem)
;
END
;
