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dterm.asm
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********************************
* *
* DELPHIterm Version 4.1 *
* *
* Copyright 1991 by Rick Adams *
* *
********************************
* EQUIV DEFINITIONS
*
* (BAUDX was 7)
BAUDX EQU 4
BLANK EQU 32
ESC EQU $1B
BREAK EQU 5
CR EQU 13
LF EQU 10
BS EQU 8
FF EQU $0C
CTLG EQU $07
CTLY EQU $19
XON EQU $11
XOFF EQU $13
SZOUT EQU $FF SIZE OF OUTPUT BUFFER
SZIN EQU $FF SIZE OF INPUT BUFFER
ATTR EQU $0
COATTR EQU $9
WATTR EQU $12
WCATTR EQU $24
CATTR EQU $1B
*----------------------------
*DIRECT PAGE COMMON
*
ORG 0
*-------------------------------
*
*SCREEN DISPLAY COMMON
*
LMAX RMB 1 MAX LINE
LINCOL
LIN RMB 1 CUR LINE
COL RMB 1 CUR COL
LCOL1 RMB 2
LCOL2 RMB 2
CCOL RMB 1 CUR CO-TERM COL
COMODE RMB 1 CO-TERM MODE
EMODE RMB 1 EDIT MODE
VMODE RMB 1 VIEW MODE
SMODE RMB 1 SPLIT SCREEN MODE
CUATTR RMB 1 CURSOR ATTRIBUTE
SCREEN RMB 2 ADDRESS OF SCREEN
CURSON RMB 1 "CURSOR ON" FLAG
WINBUF RMB 2 WINDOW POINTER
BMARK RMB 2 BEGIN MARK
EMARK RMB 2 END MARK
SCFIX RMB 1 scroll fix
BUFPTR RMB 2
SZBUF RMB 2 size of buffer
ENBUF RMB 2 end of buffer
AFLAG RMB 1
SAVBUF RMB 2
SCRIPT RMB 1 scripting enable
MAP RMB 1 active MMU map
*-------------------------------
* COMMUNICATIONS COMMON
*
CARD RMB 1
XSLICE RMB 1
XBIT RMB 1
XCHAR RMB 1
RSLICE RMB 1
RBIT RMB 1
RCHAR RMB 1
DHOLD RMB 2
XHOLD RMB 2
MASK RMB 1
XLOCK RMB 1
*-------------------------------
* BUFFERED I/O POINTERS
*
GETOUT RMB 2 RS232 OUT
PUTOUT RMB 2
OCNT RMB 1
GETIN RMB 2 RS232 IN
PUTIN RMB 2
ICNT RMB 1
PRPTR RMB 2 PRINTER OUT
PRLEN RMB 2
*-----
*
*KEYBOARD COMMON
*
KEYNO RMB 1
KEYON RMB 1
KEYTIM RMB 1
KBPUT RMB 1
KBGET RMB 1
SHLOK RMB 1 shift lock
BUTTON RMB 1
* Stuff for new keyboard driver *
KRT RMB 8 keyboard rollover table
KROW RMB 1
KCOL RMB 1
RDATA RMB 1
RTCOL RMB 1
*-------
*
*FILE CONTROL / DISK COMMON
*
FGRAN RMB 1 CURRENT GRANULE
FSECT RMB 1 CURRENT SECTOR
FPTR RMB 2 ADDR OF FILE BLOCK
FINDX RMB 1 INDEX OF FILE
FDKADR RMB 2 DISK ADDR OF FB
TOTSIZ RMB 1 #GRANS USED (USED BY DIR)
ENDPTR RMB 2 USED IN DSAVE
CMND RMB 1 CURRENT DISK COMMAND
DRIVE RMB 1 UNIT #
TRACK RMB 1 PHYSICAL DISK ADDRESS
SECTOR RMB 1 " " "
BUFAD RMB 2 MEM ADDRESS
STATUS RMB 1 STATUS
NGRANS RMB 1 max number of grans
*
*DISK I/O TEMP STORAGE
*
DDCNT RMB 1
RETRY RMB 1
DKCOMS RMB 4
DKCOM RMB 1
*NMION RMB 1
TEMP RMB 2
BUFCNT RMB 2
MACCNT RMB 2
RECRDG RMB 1
TABPAD RMB 1
* XMODEM DATA
BLOCK RMB 2 BLOCK #
ERRS RMB 1 NUMBER OF ERRORS
CKSUM RMB 1 checksum
XCKSUM RMB 1
CRC RMB 2 crc value
XCRC RMB 2
XMLEN RMB 2 buffer length
XMSIZ RMB 2 block size
XMRET RMB 2 saved stack ptr
XMCSZ RMB 1 checksum size
*Split screen data
KEY RMB 80 secondary window key
SINDX RMB 1 match index
*------------------------------
* PARAMETERS POKED IN BY BASIC
*
ORG $200
CMAX RMB 1 MAX COL
LFMAR RMB 1 LEFT MARGIN
FCOLOR RMB 1 FOREGROUND COLOR
BCOLOR RMB 1 BACKGROUND COLOR
RBAUD RMB 1 RS232 BAUD INDEX
RMB 1 UNUSED
BBAUD RMB 1 BITBANGER BAUD INDEX
PBAUD RMB 1 printer baud
AUTOLF RMB 1 0-NO, 1-YES
DUPLEX RMB 1 0-FULL, 1-HALF
FLOW RMB 1 1-XON/XOFF
RATE RMB 1 disk step rate
COFORE RMB 1 co-line fg color
COBACK RMB 1 co-line bg color
WFORE RMB 1 2nd window fg color
WBACK RMB 1 2nd window bg color
RMB 1 unused
ULOGON RMB 1 "Use MACRO file" flag
ACIA RMB 2 address of ACIA pak
TUNE RMB 2 serial port tune
UNIT RMB 1 default disk unit #
NTRAKS RMB 4 # of tracks
MEMSZ RMB 1 mem size (0=128 1=512)
ORG $982
NMION RMB 1
*------------------------------
*BUFFERS
*
ORG $1100
STKBUF RMB 0 STACK BACK FROM HERE
VIDBUF RMB $1800 SCREEN
ALCBUF RMB 256 SECTOR ALLOC TABLE
DIRBUF RMB 256 DIRECTORY SECTOR
KEYBUF RMB 256 KEYBOARD BUFFER
LINE RMB 80 GET LINE BUFFER
INBUF RMB SZIN INPUT BUF
OUTBUF RMB SZOUT OUTPUT BUF
FILBUF RMB 16 FORMATTED FILENAME
CSTART RMB 0 code start
*=============================
* MAINLINE
*=============================
ORG $3100
MAIN
*-----------------------------
*INITIALIZATION
*
ORCC #$50
LDS #STKBUF
CLRB
EXG B,DP
*CLR ROMFLG **disable**
* clear base page
CLRB
LDX #0
A@
CLR ,X+
DECB
BNE A@
* init keyboard rollover table
LDD #$FFFF
STD KRT
STD KRT+2
STD KRT+4
STD KRT+6
* move lower in memory and restart
*LEAX ENTRY,PCR
*LDY #CSTART
*A@
*LDA ,X+
*STA ,Y+
*CMPX #ZPROG
*BNE A@
*LBRA CSTART banzai!
ENTRY
* figure out memory size
*LDB #$4C
*STB $FF90 enable MMU
*LDA #$60
*STA $FF91 force map 0
*LDD #$3B0B
*STA $FFA3
*STB $FFA4
*LDA #1
*STA BUF
*CLR BUF+8192
*LDA BUF
* A will be 0 if ghosting (128K)
* A will be 1 if no ghosting (512K)
*STA MEMSZ
LBSR INIMMU
*LDD #$B000-$FF
LDD #$FFFF-$FF-$FF-BUF
STD SZBUF
ADDD #BUF
STD ENBUF
LDA #1
STA CURSON cursor on
LDD #0
LDX #BUF init window pos
STX WINBUF
LDA #$7F
STA MASK 7-bit mode
LDX #VIDBUF
STX SCREEN
LDA #24
STA LMAX number of lines
LDB TUNE
SEX
STD TUNE
CLR $FFD9 SPEED UP CPU
TST ULOGON
BNE A@
CLR $FF40 TURN OFF DISK MOTOR
A@
STB $FFDF SET 64K MODE
LDA #$C0
STA CUATTR SET DEFAULT CURSOR
LBSR CLRSCN CLEAR SCREEN
*TST ROMFLG
*BNE A@
* TAKE OVER NMI
LEAX DONMI,PCR
STX $10A
A@
* TAKE OVER IRQ
LEAX DOIRQ,PCR
STX $10D
* SET UP ACIA
LDA RBAUD
LEAX BDTABR,PCR
LDA A,X
ORA #$10
LDX ACIA
STA 3,X
CMPA 3,X
LBNE C@
LDA #$05
STA 2,X
CMPA 2,X
LBNE C@
*
*THERE IS ACIA PAK
INC CARD
C@
*
*SET UP COMMUNICATIONS COMMON
LBSR IOINIT
LBSR TIMER turn on timer
ANDCC #$AF ENABLE INTERRUPTS
*-----------------------------
*BODY OF MAINLINE
*
LBSR CURS
LEAX TITL40,PCR
LDA CMAX
CMPA #80
BNE NOT80
LEAX TITL80,PCR
NOT80
LBSR MSG
LBSR RLOGON read logon macros
* FORMAT RAMDISK!!
LBSR RDSKFM
* Main keyboard/screen/RS232 loop
LOOP1
LBSR GET KEYBOARD -> A REG
TSTA
LBMI LOOP4
TST EMODE make arrows work
BNE A@ in E mode too
TST VMODE
BEQ LOOP11
A@
*View mode
CMPA #$0C up arrow
BNE LOOPA
LBSR UPARW
LBSR REFRES
LBRA LOOP1
LOOPA
CMPA #$0A down arrow
BNE LOOPB
LBSR DNARW
LBSR REFRES
LBRA LOOP1
LOOPB
CMPA #$1C shift-uparrow
BNE LOOPC
LBSR UPARW
LBSR UPARW
LBSR UPARW
LBSR XR
LBSR UPARW
LBSR UPARW
LBSR UPARW
LBSR UPARW
LBSR XR
LBSR UPARW
LBSR UPARW
LBSR UPARW
LBSR REFRES
LBRA LOOP1
LOOPC
CMPA #$19 shift-downarrow
BNE LOOP11
LBSR DNARW
LBSR DNARW
LBSR DNARW
LBSR XR
LBSR DNARW
LBSR DNARW
LBSR DNARW
LBSR DNARW
LBSR XR
LBSR DNARW
LBSR DNARW
LBSR DNARW
LBSR REFRES
LBRA LOOP1
LOOP11
TST EMODE
LBEQ LOOP12
*Edit mode
PSHS A
LDX #BUF address of buf end
LDD BUFCNT
LEAX D,X
ADDD #1 bump to next
STD BUFCNT
PULS A
CMPA #BS
BNE EDNM
*Backspace
LDD BUFCNT nothing to backspace over?
CLR BUFCNT
CLR BUFCNT+1
SUBD #2
LBLT LOOP1
STD BUFCNT
LBSR REFRES
LBRA LOOP1
*Normal character
EDNM
CMPA #ESC BREAK key?
BEQ EDZAP
STA ,X put in buffer
LBSR REFRES and show it
TST COMODE co mode?
LBEQ LOOP1
LBRA LOOP1
EDZAP
LDD BUFCNT forget ESC
SUBD #1
STD BUFCNT
LDA -1,X
CMPA #CR end with CR?
BEQ A@
*need cr at end
LDA #CR
STA ,X
LDD BUFCNT
ADDD #1
STD BUFCNT
A@
LDA #'B
LBSR BCMD send edit buffer
LDA #'K
LBSR KCMD kill edit buffer
LBRA LOOP1
LOOP12
TST COMODE
BEQ LOOP3
CMPA #BS
LBEQ LOOP1
CMPA #BLANK
LBGE LOOP1
TFR A,B
LDA CCOL
LDX SCREEN
PSHS A
COLP
DEC ,S
BLT XCOLP
LDA ,X++
LBSR ECHO
BRA COLP
XCOLP
TFR B,A
LBSR ECHO
PULS A
LDB #COATTR
LBSR CLRCO
LBRA LOOP1
LOOP3
LBSR ECHO
LBRA LOOP1
ECHO
PSHS D
TST DUPLEX skip if full duplex
BEQ A@
LBSR PUT a reg to screen
A@
LBSR SEND a reg to rs232
PULS D,PC
*ALT KEY COMMANDS *****
LOOP4
LBSR DOCMD
LBRA LOOP1
* Do ALT key commands
DOCMD
ANDA #$7F
PSHS A
LBSR ICMD
LDA ,S
LBSR ALTF1
LDA ,S
LBSR ALTF2
LDA ,S
LBSR CLRCMD
LDA ,S
LBSR ACMD
LDA ,S
LBSR MCMD
LDA ,S
LBSR ZCMD
LDA ,S
LBSR GCMD
LDA ,S
LBSR HCMD
LDA ,S
LBSR RCMD
LDA ,S
LBSR TCMD
LDA ,S
LBSR NCMD
LDA ,S
LBSR WCMD
LDA ,S
LBSR OCMD
LDA ,S
LBSR BCMD
LDA ,S
LBSR SCMD
LDA ,S
LBSR YCMD
LDA ,S
LBSR PCMD
LDA ,S
LBSR XCMD
LDA ,S
LBSR CCMD
LDA ,S
LBSR LCMD
LDA ,S
LBSR CMD0
LDA ,S
LBSR CMDF1
LDA ,S
LBSR DCMD
LDA ,S
LBSR UCMD
LDA ,S
LBSR VCMD
LDA ,S
LBSR ECMD
LDA ,S
LBSR KCMD
LDA ,S
LBSR CMDENT
LDA ,S
LBSR FCMD
PULS A,PC
* ALT-F1 - toggle RS232 pak baudrate
ALTF1
CMPA #$64
BNE X@
TST CARD
BNE A@
LBSR XMPRT
FCC "NO RS232 PAK"
FCB 13,10
FCB 0
RTS
A@
LDA RBAUD
INCA
CMPA #3
BLT B@
CLRA
B@
STA RBAUD
LBSR XMPRT
FCB 13
FCC "RS232 PAK BAUD: "
FCB 0
LDA RBAUD
LDB #5
MUL
LEAX RTXTB,PCR
LEAX D,X
LBSR MSG
LBSR XMPRT
FCC " BAUD"
FCB 13
FCB 0
LDA RBAUD
LEAX BDTABR,PCR
LDA A,X
LDX ACIA
ORA #$10
STA 3,X
X@
RTS
RTXTB
FCC "300"
FCB 0
FCB 0
FCC "1200"
FCB 0
FCC "2400"
FCB 0
* ALT-F2 - toggle bitbanger baudrate
ALTF2
CMPA #$65
BNE X@
LDA BBAUD
INCA
CMPA #3
BLT B@
CLRA
B@
STA BBAUD
LBSR XMPRT
FCB 13
FCC "SERIAL PORT BAUD: "
FCB 0
LDA BBAUD
LDB #5
MUL
LEAX RTXTB,PCR
LEAX D,X
LBSR MSG
LBSR XMPRT
FCC " BAUD"
FCB 13
FCB 0
LDB BBAUD
CLRA
LSLB
LEAX BDTABB,PCR
LDD D,X
ADDD TUNE
STB $FF95
STA $FF94
X@
RTS
* CLEAR - Clear screen
CLRCMD
CMPA #$62
BNE X@
LBSR CLS
LBSR FIXCO
LBSR CURS
X@
RTS
* A - Turn xmodem alarm on/off
ACMD
CMPA #'A
BNE X@
LDA AFLAG
INCA
ANDA #1
STA AFLAG
BEQ A@
LBSR XMPRT
FCC "ALARM IS ON"
FCB 13
FCB 0
RTS
A@
LBSR XMPRT
FCC "ALARM IS OFF"
FCB 13
FCB 0
X@
RTS
* ALT-ENTER
CMDENT
CMPA #$5B
BNE X@
LBSR XMPRT
FCC "AUTO LINEFEED "
FCB 0
LDA AUTOLF
INCA
ANDA #1
STA AUTOLF
BEQ A@
LBSR XMPRT
FCC "ON"
FCB 13
FCB 0
RTS
A@
LBSR XMPRT
FCC "OFF"
FCB 13
FCB 0
X@
RTS
* F1 and F2 MACROS
CMDF1
CMPA #$60
BEQ A@
CMPA #$61
BNE XCMDF1
A@
ANDA #3
ADDA #'1
LDX #LINE
STA 1,X
LDA #'F
STA ,X
LDA #$0D
STA 2,X
INC SCRIPT
LBSR XMTSEQ
CLR SCRIPT
XCMDF1
RTS
FIXCO
PSHS B
TST COMODE
BEQ A@
LDB #COATTR
LBSR CLRCO
A@
PULS B,PC
* I - re-initialize i/o
ICMD
CMPA #$49
BNE A@
LBSR BEEP
IOINIT
LDX #OUTBUF
STX GETOUT
STX PUTOUT
CLR OCNT
LDX #INBUF
STX GETIN
STX PUTIN
CLR ICNT
A@
RTS
* Y - trap door
YCMD
CMPA #'Y
LBNE XYCMD
LEAU ZORK,PCR
A@
LDA ,U+
CMPA #$FF
BEQ XYCMD
ADDA #'A
LBSR PUT
BRA A@
XYCMD
RTS
ZORK
FCB 13-'A
FCB 10-'A
FCB '*-'A
FCB '*-'A
FCB '*-'A
FCB ' -'A
FCB 'C-'A
FCB 'o-'A
FCB 'l-'A
FCB 'o-'A
FCB 'r-'A
FCB ' -'A
FCB 'C-'A
FCB 'e-'A
FCB 'n-'A
FCB 't-'A
FCB 'r-'A
FCB 'a-'A
FCB 'l-'A
FCB ' -'A
FCB 's-'A
FCB 'e-'A
FCB 'z-'A
FCB ' -'A
FCB '"-'A
FCB 'J-'A
FCB 'u-'A
FCB 's-'A
FCB 't-'A
FCB ' -'A
FCB 's-'A
FCB 'a-'A
FCB 'y-'A
FCB ' -'A
FCB 'n-'A
FCB 'o-'A
FCB '"-'A
FCB ' -'A
FCB '*-'A
FCB '*-'A
FCB '*-'A
FCB 13-'A
FCB 10-'A
FCB '*-'A
FCB '*-'A
FCB '*-'A
FCB ' -'A
FCB 't-'A
FCB 'o-'A
FCB ' -'A
FCB 's-'A
FCB 'o-'A
FCB 'f-'A
FCB 't-'A
FCB 'w-'A
FCB 'a-'A
FCB 'r-'A
FCB 'e-'A
FCB ' -'A
FCB 'p-'A
FCB 'i-'A
FCB 'r-'A
FCB 'a-'A
FCB 'c-'A
FCB 'y-'A
FCB '!-'A
FCB ' -'A
FCB '*-'A
FCB '*-'A
FCB '*-'A
FCB 13-'A
FCB 10-'A
FCB $FF
* F - disk directory
FCMD
CMPA #'F
LBNE XFCMD
LBSR XMPRT
FCB 13
FCC "DRIVE: "
FCB 0
LBSR GETLIN
LDA ,X
CMPA #'A
BEQ A@
CMPA #'B
BEQ A@
SUBA #'0
BLT XFCMD
CMPA #7
BGE XFCMD
A@
STA DRIVE
LBSR DIR
XFCMD
RTS
* M - MARK BEGIN/END BUFFER BLOCK
MCMD
CMPA #'M
LBNE XMCMD
LDD EMARK
BNE NOMK
LDD BMARK
BEQ NOMK
*Beginning is marked.
CMPD EMARK
BEQ NULMK
*End needs to be marked.
LDD WINBUF
STD EMARK
LBSR XMPRT
FCC "END BLOCK MARKED"
FCB 13
FCB 0
LBSR BEEP
BRA XMCMD
*Begin, end marks are same
NULMK
LDD #0
STD BMARK
STD EMARK
LBSR XMPRT
FCC "MARKS REMOVED"
FCB 13
FCB 0
LBSR BEEP
BRA XMCMD
*No begin mark.
NOMK
LDD WINBUF mark beginning
STD BMARK
LDD #0
STD EMARK clear end mark
LBSR XMPRT
FCC "BEGIN BLOCK MARKED"
FCB 13
FCB 0
LBSR BEEP
XMCMD
RTS
NSA
FCC " ****** "
FCC " The CIA terrorist NSA uses "
FCC "encrypted Iranian drugs as "
FCC "ammunition for its crack AK-47 "
FCC "SAM MIG encoded NRO DES Russian "
FCC "socialist propaganda Tempest "
FCC "missile cocaine assassination "
FCC "conspiracies. "
FCC " ****** "
* Z - TRANSMIT TRUE LINE BREAK
ZCMD
CMPA #'Z
BNE XZCMD
TST CARD
BEQ ZCMD1
* true line break for RS232 card
LDX ACIA
LDA 2,X
PSHS A
ORA #$0C
STA 2,X
LDX #4000 delay
ZWAIT
LBSR XR
LEAX -1,X
BNE ZWAIT
PULS A
LDX ACIA
STA 2,X
BRA XZCMD
* true line break for bitbanger
ZCMD1
LDA $FF20
PSHS A
CLR $FF20
LDX #8000
ZWAIT2
LEAX -1,X
BNE ZWAIT2
PULS A
STA $FF20
XZCMD
RTS
* G - DELAY FOR 1/4 SEC
GCMD
CMPA #'G
BNE XGCMD
TST SCRIPT
BEQ XGCMD
LBSR GET
SUBA #'0
CMPA #9
BHI XGCMD
PSHS A
A@
DEC ,S
BLT X@
LDX #4000 delay