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- ;
- ; PROGRAM: ECHO
- ; AUTHOR: RICHARD CONN
- ; VERSION: 1.1
- ; DATE: 6 JAN 83
- ; PREVIOUS VERSIONS: 1.0 (10 DEC 82)
- ;
- VERS EQU 11
-
- ;
- ; This program is Copyright (c) 1982, 1983 by Richard Conn
- ; All Rights Reserved
- ;
- ; ZCPR2 and its utilities, including this one, are released
- ; to the public domain. Anyone who wishes to USE them may do so with
- ; no strings attached. The author assumes no responsibility or
- ; liability for the use of ZCPR2 and its utilities.
- ;
- ; The author, Richard Conn, has sole rights to this program.
- ; ZCPR2 and its utilities may not be sold without the express,
- ; written permission of the author.
- ;
-
-
- ;
- ; ECHO is used to echo the command line to the screen. It is invoked
- ; in two different ways:
- ; ECHO <-- print Help Message
- ; ECHO // <-- print Help Message
- ; ECHO text <-- print text
- ;
- ; This seems like a trivial program, but it buys the user one key thing:
- ; for ZCPR2 use, a message may be stored in the multiple command line buffer
- ; by using ECHO, so that programs like STARTUP can print a welcome message
- ; after they have run. For STARTUP in particular, a sample command line
- ; would be:
- ; ioloader;ld ld;tinit;echo WELCOME TO ZCPR II
- ; This line runs IOLOADER, which loads the redirectable I/O devices,
- ; followed by LD LD, which loads a named directory into memory, and TINIT,
- ; which initializes a TVI 950 terminal (function keys, user line, etc).
- ; When all is done, TINIT will have cleared the screen and ECHO will have
- ; printed its message.
- ;
-
- ;
- ; Externals
- ;
- ext pstr ; print string pted to by HL
- ext crlf ; new line
- ext print ; print string pted to by ret adr
-
- ;
- ; CP/M Constants
- ;
- tbuff equ 80h ; console line buffer
- cr equ 0dh
- lf equ 0ah
-
- ;
- ; Branch to Start of Program
- ;
- jmp start
-
- ;
- ;******************************************************************
- ;
- ; SINSFORM -- ZCPR2 Utility Standard General Purpose Initialization Format
- ;
- ; This data block precisely defines the data format for
- ; initial features of a ZCPR2 system which are required for proper
- ; initialization of the ZCPR2-Specific Routines in SYSLIB.
- ;
-
- ;
- ; EXTERNAL PATH DATA
- ;
- EPAVAIL:
- DB 0FFH ; IS EXTERNAL PATH AVAILABLE? (0=NO, 0FFH=YES)
- EPADR:
- DW 40H ; ADDRESS OF EXTERNAL PATH IF AVAILABLE
-
- ;
- ; INTERNAL PATH DATA
- ;
- INTPATH:
- DB 0,0 ; DISK, USER FOR FIRST PATH ELEMENT
- ; DISK = 1 FOR A, '$' FOR CURRENT
- ; USER = NUMBER, '$' FOR CURRENT
- DB 0,0
- DB 0,0
- DB 0,0
- DB 0,0
- DB 0,0
- DB 0,0
- DB 0,0 ; DISK, USER FOR 8TH PATH ELEMENT
- DB 0 ; END OF PATH
-
- ;
- ; MULTIPLE COMMAND LINE BUFFER DATA
- ;
- MCAVAIL:
- DB 0FFH ; IS MULTIPLE COMMAND LINE BUFFER AVAILABLE?
- MCADR:
- DW 0FF00H ; ADDRESS OF MULTIPLE COMMAND LINE BUFFER IF AVAILABLE
-
- ;
- ; DISK/USER LIMITS
- ;
- MDISK:
- DB 4 ; MAXIMUM NUMBER OF DISKS
- MUSER:
- DB 31 ; MAXIMUM USER NUMBER
-
- ;
- ; FLAGS TO PERMIT LOG IN FOR DIFFERENT USER AREA OR DISK
- ;
- DOK:
- DB 0FFH ; ALLOW DISK CHANGE? (0=NO, 0FFH=YES)
- UOK:
- DB 0FFH ; ALLOW USER CHANGE? (0=NO, 0FFH=YES)
-
- ;
- ; PRIVILEGED USER DATA
- ;
- PUSER:
- DB 10 ; BEGINNING OF PRIVILEGED USER AREAS
- PPASS:
- DB 'chdir',0 ; PASSWORD FOR MOVING INTO PRIV USER AREAS
- DS 41-($-PPASS) ; 40 CHARS MAX IN BUFFER + 1 for ending NULL
-
- ;
- ; CURRENT USER/DISK INDICATOR
- ;
- CINDIC:
- DB '$' ; USUAL VALUE (FOR PATH EXPRESSIONS)
-
- ;
- ; DMA ADDRESS FOR DISK TRANSFERS
- ;
- DMADR:
- DW 80H ; TBUFF AREA
-
- ;
- ; NAMED DIRECTORY INFORMATION
- ;
- NDRADR:
- DW 00000H ; ADDRESS OF MEMORY-RESIDENT NAMED DIRECTORY
- NDNAMES:
- DB 64 ; MAX NUMBER OF DIRECTORY NAMES
- DNFILE:
- DB 'NAMES ' ; NAME OF DISK NAME FILE
- DB 'DIR' ; TYPE OF DISK NAME FILE
-
- ;
- ; REQUIREMENTS FLAGS
- ;
- EPREQD:
- DB 000H ; EXTERNAL PATH?
- MCREQD:
- DB 000H ; MULTIPLE COMMAND LINE?
- MXREQD:
- DB 000H ; MAX USER/DISK?
- UDREQD:
- DB 000H ; ALLOW USER/DISK CHANGE?
- PUREQD:
- DB 000H ; PRIVILEGED USER?
- CDREQD:
- DB 000H ; CURRENT INDIC AND DMA?
- NDREQD:
- DB 000H ; NAMED DIRECTORIES?
- Z2CLASS:
- DB 0 ; CLASS 0
- DB 'ZCPR2'
- DS 10 ; RESERVED
-
- ;
- ; END OF SINSFORM -- STANDARD DEFAULT PARAMETER DATA
- ;
- ;******************************************************************
- ;
-
- ;
- ; Start of Program
- ;
- start:
- lxi h,tbuff ; place zero at end of command line
- mov a,m ; get char count
- inx h ; pt to first char
- push h ; save ptr
- add l ; HL=HL+A
- mov l,a
- mov a,h
- aci 0
- mov h,a
- mvi m,0 ; store ending zero
- pop h ; pt to first char
- call sblank ; skip to first non-blank
- ora a ; EOL means print Help Message
- jz phelp
- cpi '/' ; slash means print Help Message also
- jnz echo ; if not slash, print buffer contents
- ;
- ; Print Help Message
- ;
- phelp:
- call print
- db 'ECHO Version '
- db (vers/10)+'0','.',(vers mod 10)+'0'
- db cr,lf,' ECHO prints the command line on the user''s console.'
- db cr,lf,'It is invoked by the following forms:'
- db cr,lf
- db cr,lf,' ECHO or ECHO // <-- Print this Help'
- db cr,lf,' ECHO text <-- Print text'
- db cr,lf,0
- ret
- ;
- ; Echo Command Line
- ;
- echo:
- call crlf ; new line
- call pstr ; simply print string starting at HL
- ret
- ;
- ; Skip to Non-Blank
- ;
- sblank:
- mov a,m ; get char
- inx h ; pt to next
- cpi ' ' ; skip if space
- jz sblank
- dcx h ; back up to non-space
- ret
-
- end
-