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- IF NOT LASM
- .printx * CPXZ80.ASM *
- ENDIF ;NOT lasm
- ; 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.
- ;
- ; This file contains the system-dependent code and data for
- ; Kermit-80 emulated on an IBM PC or clone running Z80MU.
- ;
- ; revision history (last edit first)
- ;
- ; edit 1, 2 December, 1987. Built code for Z80MU emulation. Uses BIOS
- ; calls to 0FF12-15 to read/write from/to the PC COM1 port.
- ;
-
- .printx * Assembling for Z80MU system *
-
- ;
- ; Family is the string used in VERSION to say which of several
- ; smaller overlay files are used. These are (will be) derived from
- ; the juge CP4SYS.ASM file, in which case we will never get here.
- ; Just a Dollar, but put a sting in for a family of machines.
- ;
- family: db 'CPXZ80.ASM (1) 2-Dec-87$' ; Used for family versions....
-
-
-
- sysxin: ; continuation of system dependent initialisation code
- ret ; return from system-dependent routine
- ;
- ;
- ; system-dependent termination processing
- ; If we've changed anything, this is our last chance to put it back.
- sysexit:
- ret
-
- ;
- ; system-dependent processing for start of CONNECT command
- ;
- syscon:
- ret
-
- conmsg: ; Messages printed when entering transparent (CONNECT) mode:
- ;
- ;
- ; syscls - system-dependent close routine
- ; called when exiting transparent session.
- ;
- syscls:
- ret
- ;
- ; sysinh - help for system-dependent special functions.
- ; called in response to <escape>?, after listing all the
- ; system-independent escape sequences.
- ;
- sysinh:
- ret
-
- ;
- ; sysint - system dependent special functions
- ; called when transparent escape character has been typed;
- ; the second character of the sequence is in A (and in B).
- ; returns:
- ; non-skip: sequence has been processed
- ; skip: sequence was not recognized
- sysint: ani 137O ; convert lower case to upper, for testing...
- jmp rskp ; take skip return - command not recognized.
-
-
- ;
- ;
- ; sysflt - system-dependent filter
- ; called with character in E.
- ; if this character should not be printed, return with A = zero.
- ; preserves bc, de, hl.
- ; note: <xon>,<xoff>,<del>, and <nul> are always discarded.
- sysflt:
- mov a,e ; get character for testing
- ret
-
- ; mdmflt - modem filter [30]
- ; called with character to be sent to printer in E
- ; with parity set as appropriate.
- ; return with accumulator = 0 do do nothing,
- ; <> 0 to send char in E.
- mdmflt:
- mov a,e ;[30] get character to test
- ret
-
-
-
- ; prtflt - printer filter [30]
- ; called with character to be sent to printer in E
- ; returns with a = 0 to do nothing
- ; a <> 0 to print it.
- ;
- ; this routine for those printer that automatically insert
- ; a lf on cr, or cr for lf. Should this be shifted to
- ; the system indep. stuff, in say 4.06?
- prtflt:
- mov a,e ; [30] get character to test
- ret
-
-
- ;
- ; system-dependent processing for BYE command.
- ; for apmmdm, heath, and lobo, hang up the phone.
- sysbye:
- ret
- ;
- ;
- ; This is the system-dependent command to change the baud rate.
- ; DE contains the two-byte value from the baud rate table; this
- ; value is also stored in 'speed'.
- sysspd:
- ret
- ;
- ;
- ; The following conditionals were once a huge if not statement. There
- ; wasn't enough room to add the lobo to the list, so it had to be broken
- ; into 2, which you can't do with an if not. I redid it as two ifs and
- ; applied them to those that wouldn't set baud. [Hal Hostetler]
- spdtbl EQU 0 ;[hh] SET BAUD not supported.
- sphtbl EQU 0 ;[hh] ran out of room above...
- ;
- ;
- ; This is the system-dependent SET PORT command.
- ; HL contains the argument from the command table.
- sysprt:
- ret
-
- prttbl equ 0 ; SET PORT not supported
- prhtbl equ 0
- ;
-
- ;
- ; selmdm - select modem port
- ; selcon - select console port
- ; selmdm is called before using inpmdm or outmdm;
- ; selcon is called before using inpcon or outcon.
- ; For iobyt systems, diddle the I/O byte to select console or comm port;
- ; For Decision I, switches Multi I/O board to console or modem serial
- ; port. [Toad Hall]
- ; For the rest, does nothing.
- ; preserves bc, de, hl.
- selmdm:
- selcon:
- ret
- ;
-
- ; Get character from console, or return zero.
- ; result is returned in A. destroys bc, de, hl.
- ;
- inpcon:
- mvi c,dconio ;Direct console I/O BDOS call.
- mvi e,0FFH ;Input.
- call BDOS
- ret
- ;
-
- ;
- ; Output character in E to the console.
- ; destroys bc, de, hl
- ;
- outcon:
- mov c,e ;Console output via BIOS
- jmp bcnout
- ;
-
- ;
- ; outmdm - output a char from E to the modem.
- ; the parity bit has been set as necessary.
- ; returns nonskip; bc, de, hl preserved.
- outmdm:
- mov c,e ; get char to c
- call 0ff12h ; send to com1 via PC BIOS
- ret
- ;
- ;
- ; get character from modem; return zero if none available.
- ; for IOBYT systems, the modem port has already been selected.
- ; destroys bc, de, hl.
- inpmdm:
- ;Note: modem port should already be selected for mdI. [Toad Hall]
- call 0ff15h ;Get the port status into A.
- ana a ;See if the is non-null.
- ret ; return with character or NULL in A.
-
-
- ;
- ; flsmdm - flush comm line.
- ; Modem is selected.
- ; Currently, just gets characters until none are available.
-
- flsmdm: call inpmdm ; Try to get a character
- ora a ; Got one?
- jnz flsmdm ; If so, try for another
- ret ; Receiver is drained. Return.
- ;
-
- ;
- ; lptstat - get the printer status. Return a=0ffh if ok, or 0 if not.
- lptstat:
- xra a ; assume it is ok.. this may not be necessary
- ret
-
- ;
- ; outlpt - output character in E to printer
- ; console is selected.
- ; preserves de.
- outlpt:
- push d ; save DE in either case
- call prtflt ; go through printer filter [30]
- ana a ; if A = 0 do nothing,
- jz outlp1 ; [30] if a=0 do nothing
- mvi c,lstout
- call bdos ;Char to printer
- outlp1: pop d ; restore saved register pair
- ret
-
- ;
- ; delchr - make delete look like a backspace. Unless delete is a printing
- ; character, we just need to print a backspace. (we'll output clrspc
- ; afterwards)
- ; For Kaypro and Vector General, delete puts a blotch on the screen.
- ; For Apple and Osborne 1, delete moves but doesn't print.
- delchr:
- mvi e,bs ;get a backspace
- jmp outcon
-
- ; erase the character at the current cursor position
- clrspc: mvi e,' '
- call outcon
- mvi e,bs ;get a backspace
- jmp outcon
-
- ; erase the current line
- clrlin: lxi d,eralin
- jmp prtstr
-
- ; erase the whole screen, and go home. preserves b (but not c)
- clrtop: lxi d,erascr
- jmp prtstr
-
-
- sysver: db 'Z80MU on IBM PC $'
- IF lasm
- LINK CPXVDU.ASM
- ENDIF ;lasm - m80 will INCLUDE CPXVDU.ASM
-
-