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cpsdat.asm
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Assembly Source File
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1991-04-23
|
26KB
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649 lines
; CPSDAT.ASM
; KERMIT - (Celtic for "FREE")
;
; This is the CP/M-80 implementation of the Columbia University
; KERMIT file transfer protocol.
;
; Version 4.0
;
; Copyright June 1981,1982,1983,1984,1985
; Columbia University
;
; Originally written by Bill Catchings of the Columbia University Center for
; Computing Activities, 612 W. 115th St., New York, NY 10025.
;
; Contributions by Frank da Cruz, Daphne Tzoar, Bernie Eiben,
; Bruce Tanner, Nick Bush, Greg Small, Kimmo Laaksonen, Jeff Damens, and many
; others.
;
; Pure and impure data areas. Previously of CPSUTL.ASM
;
; revision history:
;
;edit 19, 29-Mar-1991 by MF. Add flag "initak" (nonzero) which is cleared
; after the initial automatic TAKE attempt of KERMIT.INI to allow
; "unable to find file" complaints if not doing that initial TAKE.
;edit 18, 21-Mar-1991 by MF. Renamed parameter vermin to revno (revision
; level) since verno is already known as the "minor version number".
;edit 17, 27-Feb-1991 by MF. Corrected typeo in "inms19" and commented out
; "typptr" pointer as the TYPE command now uses the big buffer.
; Also provided for a "minor version number" (1-26=A-Z) and message to
; facilitate display of Kermit version in VERSION command (modmsg)
;edit 16, 12-Feb-1991 by MF. Eliminated storage (message and variable)
; for case sensitivity by commenting it out.
;edit 15, 9-Dec-1990 by MF. Modified message for "directory file size"
; status report to make it clearer when spoken by a speech synthesizer.
;edit 14, 4-Dec-1990 by MF. Added message for Autoreceive status report.
;edit 13, 30-Nov-1990 by MF. Added messages to display regular/quiet status
; of terminal in SHOW and STATUS commands.
;edit 12, 8-Nov-1990 by MF. Added a new message for Set Autoreceive.
;edit 11, 2-Nov-1990 by MF. Moved overlay address to 7000H -- I didn't
; realize I was **that** close to the limit until I made a couple of
; cosmetic changes and REM CD bombed. This is still ver. 4.10 as it
; hasn''t been released yet.
;edit 10, 1-Nov-1990 by MF. Changed message at "spdst" to conform with
; the change of "SET BAUD-RATE" to "SET SPEED".
; Also added message "sdpst2" for speed status (staspd) routine
;edit 9, 17-Oct-1990 by MF. Changed "packet-size" messages to use the
; word "length" to conform with the nomenclature suggested in the
; 6th edition of the Kermit Protocol Manual.
;edit 8, 19-Sep-1990 by MF. Added error message for FRENAME command.
;edit 7, 14-Sep-1990 by MF. Added storage/strings for SET COLLISION command.
; Also added strings/storage for SET INCOMPLETE-FILE command.
;edit 6, 9-Sep-1990 by MF. Added messages and storage for Remote commands.
; and display of packet sizes
; Moved overlay address to 06C00H for Version 4.10.
; edit 5, 8 April, 1987 by OBSchou. Added new entry in jump table to call
; code for an external terminal type. Added some new error messages
; and added more to the packet space.
;
; edit 4, 30 March by OBSchou. Added in space for autoreceive.
;
; edit 3, 19 March, 1987 by OBSchou. Added some more strings etc, and
; increased the stack space fro 32 entries to 64.
;
; edit 2, 11 March, 1987 by OBSchou.
; Added in some more data and strings and things. Nothing special
;
; edit 1, 28 January, 1987 by OBSchou
; Following file the data section of CPSUTL.ASM. This part of the
; CPSUTL.ASM file now seperate as it ws getting too larg. Link to here
; from CPSUTL.ASM (which now has only the utlity routines).
; Also added in bits submitted by Dave Roberts of Leicester:
; DJR 18th January 1987 - David J. Roberts.
; Support for cosmetic changes in CPSMIT:
; New strings DBGST and CURDST
; CRLF in front of TIMMSG
; LOGST changed, and new LOGST2
;
;
datver: db 'CPSDAT.ASM (19) 29-Mar-1991$'
;
version:db 'Kermit-80 v4.'
db (verno/10) + '0' ; tenth's digit of version number
db (verno MOD 10) + '0' ; hundredth's digit
IF revno ;[MF]If a revision level,
db revno+'@' ;[MF]put it in (range 1-26=A-Z)
ENDIF ;revno [MF]
db ' $'
modmsg: db ' has been built from the following modules:$';[MF]
kerm: db 'Kermit-80 '
kerm1: db 'nnx:>$' ;'x' filled in at startup with DRIVE name
;'nn filled at startup and user with user number
crlf: db cr,lf,'$'
ermes1: db cr,lf,'?Unrecognized command$'
ermes3: db cr,lf,'?Not confirmed$'
ermes4: db '?Unable to receive initiate',cr,lf,'$'
ermes5: db '?Unable to receive file name',cr,lf,'$'
ermes6: db '?Unable to receive end of file',cr,lf,'$'
erms10: db '?Unable to receive data',cr,lf,'$'
erms11: db '?Disk full',cr,lf,'$'
erms12: db '?Directory full',cr,lf,'$'
erms14: db '?Unable to receive an acknowledgement from the host',cr,lf,'$'
erms15: db cr,lf,'?Unable to find file',cr,lf,'$'
erms16: db '?Unable to rename file$'
erms17: db cr,lf,'?Disk full$'
erms18: db cr,lf,'?Unable to tell host that the session is finished$'
erms19: db cr,lf,'?Unable to tell host to logout$'
erms20: db cr,lf,'?Kermit has not been configured for a target system$'
erms21: db cr,lf,'?Consistency check on configuration failed$'
erms22: db cr,lf,'?Error writing to log file',cr,lf,'$' ;[pcc005]
erms23: db cr,lf,'?Invalid user number$'
erms24: db cr,lf,'?Invalid Pause parameter$'
erms25: db cr,lf,'?Invalid BUFFER-SIZE parameter$'
erms26: db cr,lf,'?Invalid packet length (too long)$'
erms27: db cr,lf,'?Invalid Checktype$'
erms28: db cr,lf,'?Too many retries$'
erms29: db cr,lf,'?Failed to exchange parameters$'
erms30: db cr,lf,'?Failed to receive input string in alloted time$'
erms31: db cr,lf,'?File already exists$' ;[MF]
infms3: db bell,'Completed$'
infms4: db bell,'Failed$'
infms5: db '%Renaming file to $'
infms6: db cr,lf,'[Closing the log file]$'
infms7: db cr,lf,'[Connected to remote host. Type $'
infms8: db 'C to return;',cr,lf,' type $'
inms8a: db '? for command list]',cr,lf,'$'
infms9: db cr,lf,'[Connection closed, back at micro]$'
inms10: db 'Control-$'
inms11: db ' Not implemented.$'
inms12: db ' (Not implemented)',cr,lf,'$'
inms13: db bell,'Interrupted$'
inms14: db TAB,TAB,' Directory for drive '
dnam14: db 'nnx:',cr,lf,'$' ;filled in by dir routine.
inms15: DB CR,LF,TAB,TAB,'Drive $'
inms16: DB ' has $';filled in by summary code with drive letter
inms17: DB 'K bytes free',CR,LF,'$'
inms18: DB CR,LF,'File(s) erased$',CR,LF
inms19: db cr,lf,'[Transmitting file to host:'
db cr,lf,' 1. Lines automatically sent, and wait for possible reply'
db cr,lf,' 2. CONTROL-C aborts transfer'
db cr,lf,' 3. If transfer hangs, try a return to continue'
db cr,lf,' 4. on exit, you will be placed in CONNECT state.'
db cr,lf,'$'
inms20: db 'R to send the same line again,'
db cr,lf,' or type $'
inms21: db 'C to abort transmission.]',cr,lf,'$'
inms22: db cr,lf,'[Transmission done. Connected normally '
db 'to remote host,'
db cr,lf,' type $'
inms23: db 'Sending...$'
inms24: db 'Receiving...$'
inms25: db bell,'Warning: eighth bit cannot be sent$'
inms26: db cr,lf,'For help, type ? at any point in a command$'
inms27: db cr,lf,'[Logging suspended]',cr,lf,'$' ;[pcc003]
inms28: db cr,lf,'[Logging resumed]',cr,lf,'$' ;[pcc003]
inms29: db cr,lf,'[Transmission Aborted. Connected normally '
db 'to remote host,'
db cr,lf,' type $'
autmes: db cr,lf,cr,lf,'[Automatically receiving; type ^C to abort]'
db cr,lf,cr,lf,'$' ;[MF]
anymes: db cr,lf,cr,lf,' * * * Press any key to continue * * * '
db cr,lf,cr,lf,'$'
escmes: db cr,lf,'Type the new escape character: $'
tacmes: db cr,lf,'Type the new TAC intercept character: $'
sopmes: db cr,lf,'Give the start-of-packet character: $' ;[gnn]
padcms: db cr,lf,'Type the new padding character: $' ;[obs]
xmthlp: db cr,lf,'R Send the same line again$'
loghlp: db cr,lf,'Q Suspend logging' ;[pcc003]
db cr,lf,'R Resume logging$' ;[pcc003]
inthlp: db cr,lf,'? This message'
db cr,lf,'C Close the connection'
db cr,lf,'0 (zero) Transmit a NULL'
db cr,lf,'P Toggle printer on/off' ;[pcc002]
db cr,lf,'S Status of the connection$'
inhlp1: db cr,lf,'Typing another $'
inhlp2: db ' will send it to the host'
db cr,lf,cr,lf,'Command>$'
xmtst: db cr,lf,'Transmitting a file$'
autrst: db cr,lf,'Autoreceive is$'
locst: db cr,lf,'Local echo$'
onstr: db ' on$'
offstr: db ' off$'
flost: db cr,lf,'Flow control$'
;senst: db cr,lf,'Case sensetivity$'
vtdpst: db cr,lf,'Terminal display is $'
vtdpsr: db 'REGULAR$'
vtdpsq: db 'QUIET$'
vtemst: db cr,lf,'Terminal emulation is $'
cpmst: db cr,lf,'File Mode$'
defstr: db ' default$'
ascstr: db ' ASCII$'
binstr: db ' binary$'
hfsod: db cr,lf,'Display file size on DIRECTORY command$'
ibmst: db cr,lf,'IBM flag$'
incst: db cr,lf,'Disposition for incomplete files is$'
dscstr: db ' discard$'
kepstr: db ' keep$'
filst: db cr,lf,'File warning$'
prst: db cr,lf,'Printer copy$'
logst: db cr,lf,'Logging to $' ;[pcc003][DJR]
logst2: db ' is$' ;[DJR]
susstr: db ' suspended$' ;[pcc003]
sspmsg: db cr,lf,'SEND start-of-pkt char ^$' ;[gnn]
rspmsg: db cr,lf,'RECEIVE start-of-pkt char ^$' ;[gnn]
spsmsg: db cr,lf,'SEND packet length $' ;[MF]
rpsmsg: db cr,lf,'RECEIVE packet length $' ;[MF]
escst: db cr,lf,'Escape char: $'
bufsz1: db cr,lf,'Multi-sector buffering at $'
bufsz2: db ' of a maximum of $'
xmitst: db cr,lf,'Transmit protocol char: $'
bckst: db cr,lf,'Block check type: $'
bckst1: db '-character$'
collst: db cr,lf,'File COLLISION: $';[MF]
parst: db cr,lf,'Parity: $'
pnonst: db 'none$'
pmrkst: db 'mark$'
pspcst: db 'space$'
poddst: db 'odd$'
pevnst: db 'even$'
porst: db cr,lf,'Port in use is: $'
spdst: db cr,lf,'Current speed is: $'
spdst2: db ' bps$' ;[MF]
spdust: db 'indeterminate (not SET)$'
timmsg: db cr,lf,'Timer$' ;[DJR] Added CRLF like the others
tacst: db cr,lf,'Current TACTrap Status/Intercept Character: $'
usrst: db cr,lf,'Current user number: $'
dbgst: db cr,lf,'Debugging$' ;[DJR]
curdst: db cr,lf,'Current default disk: $' ;[DJR]
spac15: db ' $' ; *** 15 spaces ***
samems: db cr,lf,'?Source and destination files the same$'
nofile: db cr,lf,'?File not found$'
cmer00: db cr,lf,'?Program error: Invalid COMND call$'
cmer01: db cr,lf,'?Ambiguous$'
cmer02: db cr,lf,'?Illegal CP/M file specification$'
cmer03: db cr,lf,'?Wild-cards not allowed in file specification$' ;[pcc006]
cmer04: db cr,lf,'?Invalid user number$'
cmer05: db cr,lf,'?Invalid \ parameter$'
cmin00: db ' Confirm with carriage return$'
cmin01: db ' Enter a number$'
cmin02: db ' Confirm with carriage return or enter more$'
; Diagnostic messages
sstatm: db '<SState:> ',0
rstatm: db '<RState:> ',0
spackm: db '<Data transmitted> ',0
rpackm: db '<Data received > ',0
princr: db cr,lf,0
;
; Remote command messages [MF]
;
newfms: db cr,lf,'New file: $'
pswdms: db cr,lf,'Password: $'
acctms: db cr,lf,'Account: $'
newnms: db cr,lf,'New name: $'
msgms: db cr,lf,'Message: $'
optms: db cr,lf,'Options: $'
;
;Impure data
;COMND storage
comchr: ds 1 ;[8] save space
floctl: db 0 ;[8] flow control on/off flag
;casens: db 0 ;[8] Upper/lower case sensitive
cmstat: ds 1 ;What is presently being parsed.
cmaflg: ds 1 ;Non-zero when an action char has been found.
cmbflg: ds 1 ;[MF]Nonzero to allow a blank initial keyword
cmqflg: ds 1 ;[MF]Nonzero to prevent character echoing
;[MF]when entering commands
cmccnt: ds 1 ;Non-zero if a significant char is found.
cmsflg: ds 1 ;Non-zero when the last char was a space.
cmostp: ds 2 ;Old stack pointer for reparse.
cmrprs: ds 2 ;Address to go to on reparse.
cmprmp: ds 2 ;Address of prompt.
cmptab: ds 2 ;Address of present keyword table.
cmhlp: ds 2 ;Address of present help.
cmdbuf: ds 80H ;Buffer for command parsing.
cmbufl equ $-cmdbuf-3 ; set a limit on the command buffer
cmfcb: ds 2 ;Pointer to FCB.
cmfcb2: ds 2 ;Pointer to position in FCB.
cmfwld: ds 1 ;Wildcard flag
cmcptr: ds 2 ;Pointer for next char input.
cmdptr: ds 2 ;Pointer into the command buffer.
cmkptr: ds 2 ;Pointer to keyword.
cmsptr: ds 2 ;Place to save a pointer.
slshsn: db 0 ; slash seen in command line
slashc: db 0 ; count for number of characters in slash sequence
slashn: db 0 ; number to be built for \xxx
;
oldsp: ds 2 ;Room for old system stack.
ds 80H ;Room for 64 levels of calls.[obs]
stack: ds 2
eoflag: ds 1 ;EOF flag;non-zero on EOF.
curdsk: db 0 ;holds "logged" disk
curusr: db 0 ;[8] holds "user" number
rcvsop: db SOH ;[gnn] receive start-of-packet
sndsop: db SOH ;[gnn] send start-of-packet
prtcnt: db 0 ;[pcc008] prtchr fairness count
timflg: db 0 ;[jd] timer flag: 0 -> no timer
timval: dw 0 ;[jd] timer value
wrn8: db 0 ;[jd] non-zero if 8-bit-lost warning sent
qbchr: db '&' ;[jd] binary quote character.
quot8: db 0 ;[jd] non-zero if doing 8-bit quoting
logflg: db 0 ;Flag for a log file.
;[pcc005] 0 = no log
;[pcc005] x1 = logging on
;[pcc005] x2 = suspended
;[pcc005] 8xH (bit 7) = file open
lognam: db 0 ;[pcc013] File to use for session logging
db 'KERMIT ' ;[pcc013]
db 'LOG' ;[pcc013]
nexitf: db 0 ; set to 1 for exit to CPM after command tail
takflg: db 0 ;[8] TAKE flag.
; Bit zero = 1 for take file in progress
; bit 4 = 1 if command line present/in progress
; Note: Take has priority over command line.
initak: db 0ffh ;[MF]Cleared after initial TAKE (KERMIT.INI)
taknam: db 0 ;[8] use default drive
db 'KERMIT '
db 'INI' ;[8] Inital file to TAKE KERMIT.INI
takptr: ds 2 ;[8] Pointer to position in TAKE file input
takfcb: ds 12 ;[8] fcb space for take file
dw 0 ;[8] fill up extents etc with 00
dw 0
ds 16 ;[8] used by dos
dw 0
dw 0
takdma: ds 128 ;[8]space to read TAKE file...
prnbuf: ds 1 ; printer buffer. Output pointer
ds 1 ; input offset pointer
ds 256 ; give a large buffer
ds 10 ; and a little spare
;
;
;
; Transmit space
;
repcnt: db 0 ; repeat counter
starc: db 0 ; star count
rexbfl: db 0 ; retransmit flag (1=> retransmit)
rexcnt: db 0 ; retransmit character count
rexbuf: ds 128 ; max retransmit line length 128 characters
xmtbuff:
ds 128 ; 128 byte sector buffer
xmtptr: db 0 ; offset pointer to xmtbuff above
xmtfcb: ds 36 ; fcb for transmit file.
;
;INPUT and STRING space
strlen: db 0 ; length of the string from INPUT and STRING
; Assorted other space
errorc: db 0 ; error level set to xxx
errorl: db 0 ; error level to test against
remtxt: db 0 ; set <> 0 if D packets to screen
hosths: ds 1 ; have we told the host to xoff? (is this duplicated)
stbuff: ds 80h ; some space or the string buffer
waitp: ds 2 ; wait command timer
waitp1: ds 2 ; wait/input timer (copy of waitp)
prntmp: ds 1 ; temporary space to put the caracter to print
prnfl: db 0 ; printer flag. Used by TYPE/PRINT
;[MF][17]Following line no longer needed as TYPE uses the big buffer
;typptr: ds 2 ; pointer used by TYPE/PRINT
equflg: db 0 ; set to non zero if copy files same
nquiet: db 0 ; If non zero print from NOUT to display
escflg: db 0 ;Escape flag (start off).
fileio: db 0 ;Line-by-line from file (default off).
xofflg: db 0 ;X-OFF (=^S) received from COMM-line
;X-ON (=^Q) received resets this
clkbit: dw 0 ; 32 bit pseudo clock
dw 0 ; MS bits of clock
number: ds 2 ; Number in binary form from user input
initflg:db 0 ; set to non zero when system initialised
maxbsc: ds 1 ; save space to know how big system allows
; for multi-sector buffering. (Usually 8k?)
;
; Multiple FCB storage space. Used for the DIR command
; Later on, I want to shift this into space after the system
; dependent stuff, but then it becomes messy with pointers
; to pointers etc... [OBS]
;
xfcbptr:
ds 2 ; pointer to current fcb space
fcbcnt: ds 1 ; Number of valid fcbs in space
;
fcb0: ds 12 ; 36 bytes requred for a single fcb
fcblen EQU $-fcb0 ; length of a single fcb
ds maxfcb*fcblen ; space for maximum fcbs + 1
;
hidefs: db 0ffh ; flag <> 0 if we show file size in DIR
; FCB sapce for COPY command
cfcbs: ds 33 ; source fcb for copy file ops.
;[MF]and FRENAME ops.
cfcbd: ds 33 ; destination fcb for copy ops.
;[MF]and FRENAME ops.
colfcb: ds 33 ;[MF]Rename fcb for SET COLLISION
; Command tail data space etc
cbptr: db 2 ; command tail pointer (0= length of tail)
cbuff: ds 128 ; temp. space for potential command tail
strcnt: db 0 ; string count for string operations...
vtyval: ds 1 ; holds row number for VT52 cursor positioning
chrcnt: ds 1 ;Number of chars in the file buffer.
; Various packet variables etc
bytes: dw 0 ; 4 byte 'byte count' space
dw 0
filcnt: ds 1 ;Number of chars left to fill.
outpnt: ds 2 ;Position in packet.
bufpnt: ds 2 ;Position in file buffer.
fcbptr: ds 2 ;Position in FCB.
datptr: ds 2 ;Position in packet data buffer.
cbfptr: ds 2 ;Position in character buffer.
pktptr: ds 2 ;Position in receive packet.
size: ds 1 ;Size of data from gtchr.
curchk: ds 1 ;Current checksum type
inichk: ds 1 ;Agreed upon checksum type
czseen: ds 1 ;Flag that control-Z was typed
dscflg: ds 1 ;[MF]Discard file if nonzero
pktnum: ds 1 ;Packet number.
numpkt: ds 2 ;Total number of packets sent.
numrtr: ds 2 ;Total number of retries.
numtry: ds 1 ;Number of tries on this packet.
oldtry: ds 1 ;Number of tries on previous packet.
state: ds 1 ;Present state of the automaton.
;*** start of new flags. Do not assume that just because these flags are
; present that the feature is available. I simply put them in 'for future use'
rcapas:
rcap1: db 0 ; receive capabilties byte 0
rcap2: db 0 ; receive cpabilities byte 1
scapas:
scap1: db 0 ; send capabilities byte 0
scap2: db 0 ; send capabilities byte 1
rtimeo: db 0 ; receive timeout
stimeo: db 0 ; send timeout
rpadc: db 0 ; receive pad character
spadc: db 0 ; send pad character
rrept: db 0 ; receive repeat prefix
srept: db 0 ; send repeat prefix
rwindo: db 0 ; receive window size
swindo: db 0 ; send window size
rdpkt:
rlpkt: dw 0 ; receive long packet length
sdpkt:
slpkt: dw 0 ; send long packet length
sdckt: db 0 ; send default checktype
rdckt: db 0 ; receive checktype (should be same as sdckt)
;*** end of new flags
sohchr: db 1 ;Default Start-of-header chr is cntl-a
; Kermit packet starts here
; Byte 0 = start of packe character
; 1 = length of packet
; 2 = packet number
; 3 = packet type (S R I Z E B etc)
packet: ds 4 ;Packet (data is part of it).
; Data part of packet (variable length - include checksum)
data: ds 5AH ;Data and checksum field of packet.
recpkt: ds 65H ;Receive packet storage (use the following).
recpkx: db cr,'$' ;= = = buffer limit
filbuf: ds 65H ;Character buffer.
fnbuf: ds 20h ;[jd] file name buffer
autorc: db 0 ;[obs] set to ON for autoreceive
; Temporary data space. Sometimes accesses as 16 bits (eg temp1/2)
;** Temp 1 & 2 must be in order
lstchr: ;Last console input character.
temp1: ds 1 ;Temporary storage.
temp2: ds 1
lincnt: ; used for counting lines in p20ln
temp3: ds 1
temp4: ds 1
temp5: ds 1
temp6: ds 1
temp7: ds 1
temp8: ds 1
temp9: ds 1
temp10: ds 1
temp11: ds 1
getrxflg:
ds 1 ;[obs 22]
quietd: db 0 ;loud display during file transfers
argblk: ds 20H ;Used for subroutine arguments
maxfil EQU 2 ; currently, only two names used.
fcbblk: ds maxfil*10H ;Used for a list of FCB's
; [gnn] secondary filename storage (remote on send, local on get)
remnam: ds 60 ;[gnn]
remlen: ds 1 ;[gnn] length of name
; Bookkeeping storage for multiple-sector buffering. The actual buffer
; is somewhere in the system-dependent overlay. (at the end, I hope).
nxtbuf: ds 2 ; Pointer to next sector
seccnt: ds 1 ; Number of sectors buffered
endsts: ds 1 ; Status for last read into buffer
;
;
; [MF] Storage for Remote Command processing
;
;
rdl: ds 1 ;[MF]Holds accumulated length of remote data
;
rcl: ds 1 ;[MF]Holds length of Remote command line arg
;
remdat: ds 95 ;[MF]Packet data buffer (plenty big)
;
rcom: ds 1 ;[MF] Remote Command type
;
rprmpt: dw 0 ;[MF]Address of prompt strings
;
rptr: dw 0 ;[MF]Remote command packet data pointer
;
rscode: ds 3 ;[MF]Holds Remote Set command ASCII code
;
;
org 7000h ; address for Kermit 4.11
; ORG ($ + 0ffH) AND 0ff00H ; move to start of next page
;
; hooks for system-dependent routines:
; This area is overwritten by the system-dependent overlay.
;
lnkflg: dw 0 ; linkage information for consistency check.
lnkent: dw 0 ; more of the same.
ovlver: dw 0 ; pointer to overlay's version string
family: dw 0 ;*NEW* [10] address of the family overlay (not CPSSYS)
;
; Input/output routines. Note that outmdm and outcon may actually be the
; same routine if selmdm and selcon do anything. (the same is true
; of inpmdm and inpcon).
;
selmdm: jmp $-$ ; select modem for I/O
outmdm: jmp $-$ ; output character in E to modem
inpmdm: jmp $-$ ; read character from modem. return character or 0 in A.
flsmdm: jmp $-$ ; flush pending input from modem
selcon: jmp $-$ ; select console for I/O
outcon: jmp $-$ ; output character in E to console
inpcon: jmp $-$ ; read char from console. return character or 0 in A
outlpt: jmp $-$ ; output character in E to printer
lptstat:jmp $-$ ;*NEW*[10] see if printer ready to print a character
; If 0ffh then ok, if 0h then not ok.
extern: jmp $-$ ;*NEW for 4.09* If $-$ is not zero, then its a jump to
; a routine to emulate any terminal type the user
; wants to implement.
xbdos: jmp 0 ;*NEW* address of the bdos trap in this section
; of code. It is filled in initialisation.
;
; screen formatting routines
clrlin: jmp $-$ ; erase current line
clrspc: jmp $-$ ; erase current position (after backspace)
delchr: jmp $-$ ; make delete look like backspace
clrtop: jmp $-$ ; erase screen and go home
;
; these routines are called to display a field on the screen.
scrend: jmp $-$ ; move to prompt field
screrr: jmp $-$ ; move to error message field
scrfln: jmp $-$ ; move to filename field
scrnp: jmp $-$ ; move to packet count field
scrnrt: jmp $-$ ; move to retry count field
scrst: jmp $-$ ; move to status field
rppos: jmp $-$ ; move to receive packet field (debug)
sppos: jmp $-$ ; move to send packet field (debug)
;
sysinit: jmp $-$ ; program initialization
sysexit: jmp $-$ ; program termination
syscon: jmp $-$ ; remote session initialization
syscls: jmp $-$ ; return to local command level
sysinh: jmp $-$ ; help text for interrupt (escape) extensions
sysint: jmp $-$ ; interrupt (escape) extensions, including break
sysflt: jmp $-$ ; filter for incoming characters.
; called with character in E.
sysbye: jmp $-$ ; terminate remote session
sysspd: jmp $-$ ; baud rate change routine.
; called with value from table in DE
sysprt: jmp $-$ ; port change routine.
; called with value from table in HL
sysscr: jmp $-$ ; screen setup for file transfer
; called with Kermit's version string in DE
csrpos: jmp $-$ ; move cursor to row B, column C
sysspc: jmp $-$ ; calculate free space for current disk
mover: jmp $-$ ; block move
prtstr: jmp $-$ ; *** NEW *** prtstr moved to overlay
;
; Data initialized by system-dependent overlay:
;
pttab: ds 2 ; points to local equivalents to VT52 escape sequences
spdtab: ds 2 ; address of baud rate command table, or zero
spdhlp: ds 2 ; address of baud rate help table, or zero
prttab: ds 2 ; address of port command table, or zero
prthlp: ds 2 ; address of port help table, or zero
timout: ds 2 ; Initial value for fuzzy timeout
vtflg: ds 1 ; VT52 emulation flag
escchr: ds 1 ; Storage for the escape character.
speed: ds 2 ; storage for the baud rate
port: ds 2 ; storage for port value
prnflg: ds 1 ;[hh] printer copy flag (overlay may need it)
dbgflg: ds 1 ; debugging flag
ecoflg: ds 1 ; Local echo flag (default off).
flwflg: ds 1 ; File warning flag (default on).
ibmflg: ds 1 ; IBM flag (default off).
cpmflg: ds 1 ; File mode flag (ascii/binary/default)
incflg: ds 1 ;[MF]Incomplete flag (keep/discard)
;[MF](default discard)
parity: ds 1 ; Current parity.
spsiz: ds 1 ; Send packet size.
rpsiz: ds 1 ; Receive packet size.
stime: ds 1 ; Send time out.
rtime: ds 1 ; Receive time out.
spad: ds 1 ; Send padding.
rpad: ds 1 ; Receive padding.
spadch: ds 1 ; Send padding char.
rpadch: ds 1 ; Receive padding char.
seol: ds 1 ; Send EOL char.
reol: ds 1 ; Receive EOL char.
squote: ds 1 ; Send quote char.
rquote: ds 1 ; Receive quote char.
chktyp: ds 1 ; Checksum type desired
tacflg: ds 1 ; TACTrap flag (zero=off, nonzero=on; when non-zero,
; contains current TAC intercept character)
tacchr: ds 1 ; TAC intercept character
bufadr: ds 2 ; Pointer to big buffer for multiple-sector I/O
bufsec: ds 1 ; Number of sectors big buffer can hold (0 means 256)
ffussy: ds 1 ; if nonzero, don't permit <>.,;?*[] in CP/M filespec.
; space used by directory command; here because space calculation is
; (operating) system-dependent
bmax: ds 2 ; highest block number on drive
bmask: ds 1 ; (records/block)-1
bshiftf: ds 1 ; number of shifts to multiply by rec/block
nnams: ds 1 ; counter for filenames per line
lnksiz equ $-lnkflg ; length of linkage section, for consistency check.
END START