mirror of
https://github.com/forth-ev/VolksForth.git
synced 2024-07-10 05:29:03 +00:00
154 lines
9.4 KiB
Forth
154 lines
9.4 KiB
Forth
\ *** Block No. 0 Hexblock 0
|
|
|
|
This video display interface utilizes the ROM BIOS call $10.
|
|
The display is fairly fast and should work on most IBM
|
|
compatible computers
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 1 Hexblock 1
|
|
\ BIOS display interface ks 1 secas 09jun20
|
|
Onlyforth \needs Assembler 2 loadfrom asm.fb
|
|
Variable dpage dpage off
|
|
Variable top top off
|
|
|
|
Code (at ( lin col -- ) A pop R push U push
|
|
dpage #) R+ mov A- D+ mov 2 # A+ mov $10 int
|
|
U pop R pop D pop Next end-code
|
|
|
|
Code (at? ( -- lin col ) D push R push U push
|
|
dpage #) R+ mov 3 # A+ mov $10 int U pop R pop
|
|
D+ A- mov 0 # A+ mov A+ D+ mov A push Next
|
|
end-code
|
|
|
|
1 6 +thru .( BIOS display interface active) cr
|
|
|
|
\ *** Block No. 2 Hexblock 2
|
|
\ BIOS normal invers blankline ks 1 sep 86
|
|
: full top off ;
|
|
|
|
Variable attribut 7 attribut !
|
|
|
|
: normal 7 attribut ! ; : invers $70 attribut ! ;
|
|
: underline 1 attribut ! ; : bright $F attribut ! ;
|
|
|
|
Code blankline D push R push U push
|
|
dpage #) R+ mov attribut #) R- mov
|
|
3 # A+ mov $10 int ' c/row >body #) C mov
|
|
D- C- sub bl # A- mov 9 # A+ mov $10 int
|
|
U pop R pop D pop Next end-code
|
|
|
|
| : lineerase 0 (at blankline ;
|
|
|
|
\ *** Block No. 3 Hexblock 3
|
|
\ curshape setpage curat? ks 8 mar 88
|
|
|
|
Code curshape ( top bot -- ) D C mov D pop
|
|
D- C+ mov 1 # A+ mov $10 int D pop Next
|
|
end-code
|
|
|
|
Code setpage ( n -- )
|
|
$503 # A mov D- A- and $10 int D pop Next
|
|
end-code
|
|
|
|
' (at? Alias curat?
|
|
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 4 Hexblock 4
|
|
\ BIOS (type (emit ks 1 sep 86
|
|
|
|
Code (type ( addr len -- ) W pop R push U push
|
|
D U mov dpage #) R+ mov attribut #) R- mov
|
|
3 # A+ mov $10 int U inc C push $E0E # C mov
|
|
1 # A+ mov $10 int 1 # C mov [[ U dec 0= not
|
|
?[[ D- inc ' c/row >body #) D- cmp 0= not
|
|
?[[ W ) A- mov W inc 9 # A+ mov
|
|
$10 int 2 # A+ mov $10 int ]]?
|
|
]? C pop 1 # A+ mov $10 int
|
|
U pop R pop D pop ' pause #) jmp
|
|
end-code
|
|
|
|
: (emit ( char -- ) sp@ 1 (type drop ;
|
|
|
|
|
|
\ *** Block No. 5 Hexblock 5
|
|
\ BIOS (del scroll (cr (page ks 2 sep 86
|
|
|
|
: (del (at? ?dup
|
|
IF 1- 2dup (at bl (emit (at exit THEN drop ;
|
|
|
|
Code scroll D push R push U push attribut #) R+ mov
|
|
top #) C+ mov 0 # C- mov ' c/row >body #) D- mov
|
|
D- dec ' c/col >body #) D+ mov D+ dec D+ dec
|
|
$601 # A mov $10 int U pop R pop D pop Next
|
|
end-code
|
|
|
|
: (cr (at? drop 1+ dup 2+ c/col u>
|
|
IF scroll 1- THEN lineerase ;
|
|
|
|
: (page top @ c/col 2- DO I lineerase -1 +LOOP ;
|
|
|
|
\ *** Block No. 6 Hexblock 6
|
|
\ BIOS status display ks 2 sep 86
|
|
|
|
' (emit ' display 2 + ! ' (cr ' display 4 + !
|
|
' (type ' display 6 + ! ' (del ' display 8 + !
|
|
' (page ' display &10 + !
|
|
' (at ' display &12 + ! ' (at? ' display &14 + !
|
|
|
|
: .sp ( n -- ) ." s" depth swap 1+ - 2 .r ;
|
|
: .base base @ decimal dup 2 .r base ! ;
|
|
: (.drv ( n -- ) Ascii A + emit ." : " ;
|
|
: .dr ." " drv (.drv ;
|
|
: .scr blk @ IF ." Blk" blk ELSE ." Scr" scr THEN
|
|
@ 5 .r ;
|
|
: .space ." Dic" s0 @ here $100 + - 6 u.r ;
|
|
|
|
|
|
\ *** Block No. 7 Hexblock 7
|
|
\ statuszeile ks 1 sep 86
|
|
|
|
| : fstat ( n -- ) .base .sp
|
|
.space .scr .dr file? 2 spaces order ;
|
|
|
|
: .stat attribut @ output @ (at?
|
|
display invers c/col 1- 0 (at 4 fstat
|
|
blankline (at output ! attribut ! ;
|
|
|
|
: +stat ['] .stat Is .status .status ;
|
|
|
|
: -stat ['] noop Is .status ;
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 8 Hexblock 8
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|