Screen 0 not modified 0 1 This display interface uses BIOS call $10 functions for a fast 2 display interface. A couple of state variables is contained 3 in a vector that is task specific such that different tasks 4 may use different windows. For simplicity windows always 5 span the whole width of the screen. They can be defined by 6 top and bottom line. This mechanism is used for a convenient 7 status display line on the bottom of the screen. 8 9 10 11 12 13 14 15 Screen 1 not modified 0 \ Multitsking display interface loadscreen ks cas 10nov05 1 Onlyforth \needs Assembler 2 loadfrom asm.scr 2 3 User area area off \ points at active window 4 Variable status \ to switch status on/off 5 | Variable cursor \ points at area with active cursor 6 7 1 8 +thru .( Multitasking display driver loaded ) cr 8 9 10 11 12 13 14 15 Screen 2 not modified 0 \ Multitsking display interface ks 6 sep 86 1 2 : Area: Create 0 , 0 , 7 c, Does> area ! ; 3 \ | col | row | top | bot | att | 4 5 Area: terminal terminal area @ cursor ! 6 7 : (area Create dup c, 1+ Does> c@ area @ + ; 8 9 0 | (area ccol | (area crow | (area ctop 10 | (area cbot (area catt drop 11 12 : window ( topline botline -- ) cbot c! ctop c! ; 13 14 : full 0 c/col 2- window ; full 15 Screen 3 not modified 0 \ Multitask (type (emit ks 20 dez 87 1 2 Code (type ( addr len -- ) W pop I push R push 3 u' area U D) I mov U push D U mov 4 $F # A+ mov $10 int u' catt I D) R- mov 5 3 # A+ mov $10 int C push D push $E0E # C mov 6 1 # A+ mov $10 int I ) D mov 1 # C mov 7 U inc [[ U dec 0= not ?[[ 2 # A+ mov $10 int 8 D- inc ' c/row >body #) D- cmp 0= not 9 ?[[ W ) A- mov W inc 9 # A+ mov $10 int ]]? ]? 10 D I ) mov D pop cursor #) I cmp 0= ?[ I ) D mov ]? 11 2 # A+ mov $10 int C pop 1 # A+ mov $10 int U pop 12 R pop I pop D pop ' pause #) jmp end-code 13 14 : (emit ( char -- ) sp@ 1 (type drop ; 15 Screen 4 not modified 0 \ Multitask (at (at? ks 04 aug 87 1 Code (at ( row col -- ) A pop A- D+ mov 2 u' area U D) W mov D W ) mov cursor #) W cmp 0= 3 ?[ R push U push $F # A+ mov $10 int 4 2 # A+ mov $10 int U pop R pop 5 ]? D pop Next end-code 6 7 Code (at? ( -- row col ) 8 D push u' area U D) W mov W ) D mov 9 D+ A- mov 0 # A+ mov A+ D+ mov A push Next 10 end-code 11 12 Code curat? ( -- row col ) D push R push 13 $F # A+ mov $10 int 3 # A+ mov $10 int 14 R pop 0 # A mov D+ A- xchg A push Next 15 end-code Screen 5 not modified 0 \ cur! curshape setpage ks 28 jun 87 1 2 : cur! \ set cursor into current task's window 3 area @ cursor ! (at? (at ; cur! 4 5 Code curshape ( top bot -- ) D C mov D pop 6 D- C+ mov 1 # A+ mov $10 int D pop Next 7 end-code 8 9 Code setpage ( n -- ) 10 $503 # A mov D- A- and $10 int D pop Next 11 end-code 12 13 14 15 Screen 6 not modified 0 \ Multitask normal invers blankline ks 01 nov 88 1 : normal 7 catt c! ; : invers $70 catt c! ; 2 : underline 1 catt c! ; : bright $F catt c! ; 3 4 Code blankline D push R push U push $F # A+ mov 5 $10 int u' area U D) W mov u' catt W D) R- mov 6 3 # A+ mov $10 int C push D push 7 $E0E # C mov 1 # A+ mov $10 int W ) D mov 8 2 # A+ mov $10 int ' c/row >body #) C mov 9 D- C- sub bl # A- mov 9 # A+ mov 10 C- C- or 0= not ?[ $10 int ]? 11 D pop 2 # A+ mov $10 int \ set cursor back 12 C pop 1 # A+ mov $10 int \ cursor visible again 13 U pop R pop D pop ' pause #) jmp end-code 14 15 | : lineerase ( line# -- ) 0 (at blankline ; Screen 7 not modified 0 \ Multitask (del scroll (cr (page ks 04 okt 87 1 2 : (del (at? ?dup 3 IF 1- 2dup (at bl (emit (at exit THEN drop ; 4 5 Code scroll D push R push U push 6 u' area U D) W mov u' catt W D) R+ mov 7 u' ctop W D) D mov D- C+ mov 0 # C- mov 8 ' c/row >body #) D- mov D- dec $601 # A mov 9 $10 int U pop R pop D pop Next 10 end-code 11 12 : (cr (at? drop 1+ dup cbot c@ u> 13 IF scroll drop cbot c@ THEN lineerase ; 14 15 : (page ctop c@ cbot c@ DO I lineerase -1 +LOOP ; Screen 8 not modified 0 \ Multitask status display ks 10 okt 87 1 2 ' (emit ' display 2 + ! ' (cr ' display 4 + ! 3 ' (type ' display 6 + ! ' (del ' display 8 + ! 4 ' (page ' display &10 + ! 5 ' (at ' display &12 + ! ' (at? ' display &14 + ! 6 7 : .base base @ decimal dup 2 .r base ! ; 8 : .sp ( n -- ) ." s" depth swap 1+ - 2 .r ; 9 : (.drv ( n -- ) Ascii A + emit ." : " ; 10 : .dr ." " drv (.drv ; 11 : .scr blk @ IF ." Blk" blk ELSE ." Scr" scr THEN 12 @ 5 .r ; 13 : .space ." Dic" s0 @ here $100 + - 6 u.r ; 14 15 Screen 9 not modified 0 \ statuszeile ks ks 04 aug 87 1 2 | : fstat ( n -- ) .base .sp 3 .space .scr .dr file? 2 spaces order ; 4 5 | Area: statusline 6 statusline c/col 1- dup window page invers terminal 7 8 : (.status output @ display area @ statusline 9 status @ IF (at? drop 0 (at 2 fstat blankline 10 ELSE normal page invers 11 THEN area ! output ! ; 12 ' (.status Is .status 13 14 : bye status off .status bye ; 15 Screen 10 not modified 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Screen 11 not modified 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Screen 12 not modified 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Screen 13 not modified 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Screen 14 not modified 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Screen 15 not modified 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Screen 16 not modified 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Screen 17 not modified 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15