mirror of
https://github.com/forth-ev/VolksForth.git
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137 lines
8.4 KiB
Forth
137 lines
8.4 KiB
Forth
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\ *** Block No. 0 Hexblock 0
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cas 10nov05
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Video display interface for an ANSI.SYS interface.
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It should work on any MS-DOS computer. Since ANSI.SYS does
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not have a delete line function, split screen can not
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be implemented as usual. Instead, the cursor "rotates"
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ie. when a CR is performed on the bottom line, the cursor
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moves up to the top line in the current window.
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\ *** Block No. 1 Hexblock 1
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\ ansi cursor control cas 10nov05
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Onlyforth
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| : (char" "lit count bounds DO I c@ charout LOOP ;
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| : char" compile (char" ," align ; immediate restrict
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| Ascii 0 Constant #0
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| : (#S) ( u -- ) &10 /mod #0 + charout #0 + charout ;
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: (at ( row col -- ) char" ["
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swap 1+ (#S) char" ;" 1+ (#S) char" H" ;
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| : )##( ( -- u ) (key #0 - &10 * (key #0 - + ;
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1 4 +thru .( ANSI display interface active) cr
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\ *** Block No. 2 Hexblock 2
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\ Ansi Standard display output cas 10nov05
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| : keydrop (key drop ;
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: (at? char" [6n" keydrop keydrop
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)##( 1- keydrop )##( 1- keydrop keydrop ;
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Variable top top off
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: full top off ;
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: blankline char" [K" ;
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| : lineerase 0 (at blankline ;
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: normal char" [0m" ; : invers char" [7m" ;
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: underline char" [4m" ; : bright char" [1m" ;
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\ *** Block No. 3 Hexblock 3
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\ Ansi Standard display output cas 10nov05
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' 2drop Alias curshape
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' drop Alias setpage
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' (at? Alias curat?
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: (type ( addr len -- ) pad place
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pad count bounds ?DO I c@ (emit LOOP ;
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: (cr top @ 0= adr .status @ ['] noop = and
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IF (cr exit THEN row c/col 2- u<
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IF row 1+ ELSE top @ THEN lineerase ;
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: (page top @ 0= IF char" [2J" exit THEN
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top @ c/col 2- DO I lineerase -1 +LOOP ;
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\ *** Block No. 4 Hexblock 4
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\ statusline cas 10nov05
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' (cr ' display 4 + ! ' (type ' display 6 + !
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' (page ' display &10 + !
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' (at ' display &12 + ! ' (at? ' display &14 + !
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: .sp ( n -- ) ." s" depth swap 1+ - 2 .r ;
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: .base base @ decimal dup 2 .r base ! ;
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: (.drv ( n -- ) Ascii A + emit ." : " ;
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: .dr ." " drv (.drv ;
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: .scr blk @ IF ." Blk" blk ELSE ." Scr" scr THEN
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@ 5 .r ;
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: .space ." Dic" s0 @ here $100 + - 6 u.r ;
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\ *** Block No. 5 Hexblock 5
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\ statusline cas 10nov05
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| : fstat ( n -- ) invers .base .sp
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.space .scr .dr file? 2 spaces order normal ;
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: .stat output @ (at? display c/col 1- 0 (at
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3 fstat blankline (at output ! ;
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: +stat ['] .stat Is .status .status ;
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: -stat ['] noop Is .status ;
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\ *** Block No. 6 Hexblock 6
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\ *** Block No. 7 Hexblock 7
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