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- ;********************************************************************
- ;
- ; ISEC: A ZCPR 3.3+ compatible routine, using the version 4
- ; libraries, to draw an intersection character
- ; on the screen, for use in alias scripts.
- ;
- ; Version 3.0D (July 7, 1990) - Updated and re-linked based upon
- ; VLIB4D and version 4 libraries. Assembled with SLR's Z80ASM and
- ; linked with DRI's LINK. Thanks go to Dave Ramsey for producing
- ; an excellent set of command-level graphics tools. Bob Dean
- ;
- ; Author: Dave Ramsey Date: May 25, 1989
- ; Versions 1.0 and 2.0.
- ;
- ;********************************************************************
- ;
- ; VLIB/Z3LIB/SYSLIB references:
- ;
- ext gz3init,tinit,dinit,at,ltisec,rtisec,uisec,lisec,isec,vpstr
- ext eval10,argv
- ;
- ; Constants defined:
- ;
- VERSION equ 1
- MONTH equ 7
- DAY equ 5
- YEAR equ 90
- ;
- DOS equ 5
- BUFFER equ 080h
- CR equ 13
- LF equ 10
- ARGCNT equ 3
- ;
- start:
- jp main
- db 'Z3ENV'
- db 1
- z3eadr: ds 2
- main:
- ld hl,(z3eadr)
- call gz3init
- and a,0fh ; check for presence of exended tcap
- jr nz,stack
- ld hl,oldtcpmsg
- call vpstr ; print old tcap warning message
- ret ; return to CCP
- ;
- ; setup stack...
- ;
- stack:
- ld hl,0
- add hl,sp
- ld (oldsp),hl
- ld hl,(DOS+1)
- ld l,0
- ld a,h
- add a,-8
- ld h,a
- ld sp,hl
- ;
- ; Get command line parms, there should be 3 and store results
- ;
- ld a,0ffh ; null terminate argument strings
- ld hl,BUFFER+1
- ld de,tokentbl
- call argv
- ld a,(numtok)
- cp a,ARGCNT ; did the user get it right?
- jp nz,gethelp ; nope, tell him how to call us.
- ;
- ; Else, store parm results directly inline for the drbox call and execute
- ;
- ld hl,(parm1)
- call eval10
- ld (type),a
- ld hl,(parm2)
- call eval10
- ld (row),a ; save row number
- ld hl,(parm3)
- call eval10
- ld (col),a ; save column number
- ;
- ; else... init terminal as per V4 lib conventions
- ;
- call tinit
- ;
- ; Call AT to position cursor.
- ;
- call at
- row: db 0
- col: db 0
- ;
- ; Now select the intersection character to draw.
- ;
- left:
- ld a,(type)
- cp a,1
- jr nz,right
- call ltisec
- jp fini
- right:
- cp a,2
- jr nz,upper
- call rtisec
- jp fini
- upper:
- cp a,3
- jr nz,lower
- call uisec
- jp fini
- lower:
- cp a,4
- jr nz,inter
- call lisec
- jp fini
- inter:
- cp a,5
- jr nz,badval
- call isec
- jp fini
- badval:
- ld hl,badchmsg
- call vpstr
-
- ;
- ; deinit terminal and restore stack
- ;
- fini:
- call dinit
- ;
- fini2:
- ld hl,(oldsp)
- ld sp,hl
- ret
- ;
- ;
- gethelp:
- ld hl,helpmsg
- call vpstr
- jp fini2
-
- ;
- oldsp: ds 2
- ;
- tokentbl:
- maxtok: db ARGCNT ; I don't want to see more than 5 arguments,
- numtok: db 0 ; but how many were there really?
- parm1: ds 2 ; address arg 1 - intersection char
- parm2: ds 2 ; address arg 2 - row
- parm3: ds 2 ; address arg 3 - col
- ;
- type: db 0
- ;
- helpmsg:
- db 'ISEC, Version ',VERSION/10+'0','.',VERSION MOD 10+'0',CR,LF
- db 'ISEC - Draws an intersection character on the screen.',CR,LF
- db 'Syntax:',CR,LF
- db ' ISEC <type> <row> <col> ',CR,LF
- db 'Where:',CR,LF
- db ' <type> is an integer 1 for a left intersection, ',CR,LF
- db ' an integer 2 for a right intersection, ',CR,LF
- db ' an integer 3 for an upper intersection, ',CR,LF
- db ' an integer 4 for a lower intersection,',CR,LF
- db ' an integer 5 for a center intersection;',CR,LF
- db ' <row> is the row on the screen to place the char;',CR,LF
- db ' <col> is the column on the screen to place the char.'
- db CR,LF,0
- ;
- badchmsg:
- db 'Invalid intersection character requested.',CR,LF,0
- oldtcpmsg:
- db 'Extended TCAP not present.',CR,LF,0
- end