mirror of
https://github.com/forth-ev/VolksForth.git
synced 2024-11-03 07:05:57 +00:00
154 lines
9.8 KiB
Plaintext
154 lines
9.8 KiB
Plaintext
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Screen 0 not modified
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0
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1 This video display interface utilizes the ROM BIOS call $10.
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2 The display is fairly fast and should work on most IBM
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3 compatible computers
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4
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5
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6
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7
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8
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9
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10
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11
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12
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13
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14
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15
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Screen 1 not modified
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0 \ BIOS display interface ks 1 sep 86
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1 Onlyforth \needs Assembler 2 loadfrom asm.scr
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2 Variable dpage dpage off
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3 Variable top top off
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4
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5 Code (at ( lin col -- ) A pop R push U push
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6 dpage #) R+ mov A- D+ mov 2 # A+ mov $10 int
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7 U pop R pop D pop Next end-code
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8
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9 Code (at? ( -- lin col ) D push R push U push
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10 dpage #) R+ mov 3 # A+ mov $10 int U pop R pop
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11 D+ A- mov 0 # A+ mov A+ D+ mov A push Next
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12 end-code
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13
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14 1 6 +thru .( BIOS display interface active) cr
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15
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Screen 2 not modified
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0 \ BIOS normal invers blankline ks 1 sep 86
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1 : full top off ;
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2
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3 Variable attribut 7 attribut !
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4
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5 : normal 7 attribut ! ; : invers $70 attribut ! ;
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6 : underline 1 attribut ! ; : bright $F attribut ! ;
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7
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8 Code blankline D push R push U push
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9 dpage #) R+ mov attribut #) R- mov
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10 3 # A+ mov $10 int ' c/row >body #) C mov
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11 D- C- sub bl # A- mov 9 # A+ mov $10 int
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12 U pop R pop D pop Next end-code
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13
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14 | : lineerase 0 (at blankline ;
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15
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Screen 3 not modified
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0 \ curshape setpage curat? ks 8 mar 88
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1
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2 Code curshape ( top bot -- ) D C mov D pop
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3 D- C+ mov 1 # A+ mov $10 int D pop Next
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4 end-code
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5
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6 Code setpage ( n -- )
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7 $503 # A mov D- A- and $10 int D pop Next
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8 end-code
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9
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10 ' (at? Alias curat?
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11
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12
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13
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14
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15
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Screen 4 not modified
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0 \ BIOS (type (emit ks 1 sep 86
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1
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2 Code (type ( addr len -- ) W pop R push U push
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3 D U mov dpage #) R+ mov attribut #) R- mov
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4 3 # A+ mov $10 int U inc C push $E0E # C mov
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5 1 # A+ mov $10 int 1 # C mov [[ U dec 0= not
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6 ?[[ D- inc ' c/row >body #) D- cmp 0= not
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7 ?[[ W ) A- mov W inc 9 # A+ mov
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8 $10 int 2 # A+ mov $10 int ]]?
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9 ]? C pop 1 # A+ mov $10 int
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10 U pop R pop D pop ' pause #) jmp
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11 end-code
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12
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13 : (emit ( char -- ) sp@ 1 (type drop ;
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14
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15
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Screen 5 not modified
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0 \ BIOS (del scroll (cr (page ks 2 sep 86
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1
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2 : (del (at? ?dup
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3 IF 1- 2dup (at bl (emit (at exit THEN drop ;
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4
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5 Code scroll D push R push U push attribut #) R+ mov
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6 top #) C+ mov 0 # C- mov ' c/row >body #) D- mov
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7 D- dec ' c/col >body #) D+ mov D+ dec D+ dec
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8 $601 # A mov $10 int U pop R pop D pop Next
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9 end-code
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10
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11 : (cr (at? drop 1+ dup 2+ c/col u>
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12 IF scroll 1- THEN lineerase ;
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13
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14 : (page top @ c/col 2- DO I lineerase -1 +LOOP ;
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15
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Screen 6 not modified
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0 \ BIOS status display ks 2 sep 86
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1
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2 ' (emit ' display 2 + ! ' (cr ' display 4 + !
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3 ' (type ' display 6 + ! ' (del ' display 8 + !
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4 ' (page ' display &10 + !
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5 ' (at ' display &12 + ! ' (at? ' display &14 + !
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6
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7 : .sp ( n -- ) ." s" depth swap 1+ - 2 .r ;
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8 : .base base @ decimal dup 2 .r base ! ;
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9 : (.drv ( n -- ) Ascii A + emit ." : " ;
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10 : .dr ." " drv (.drv ;
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11 : .scr blk @ IF ." Blk" blk ELSE ." Scr" scr THEN
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12 @ 5 .r ;
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13 : .space ." Dic" s0 @ here $100 + - 6 u.r ;
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14
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15
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Screen 7 not modified
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0 \ statuszeile ks 1 sep 86
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1
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2 | : fstat ( n -- ) .base .sp
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3 .space .scr .dr file? 2 spaces order ;
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4
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5 : .stat attribut @ output @ (at?
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6 display invers c/col 1- 0 (at 4 fstat
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7 blankline (at output ! attribut ! ;
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8
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9 : +stat ['] .stat Is .status .status ;
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10
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11 : -stat ['] noop Is .status ;
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12
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13
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14
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15
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Screen 8 not modified
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0
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1
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2
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3
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6
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7
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8
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9
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10
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11
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12
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13
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14
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15
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