nxu/femto.tal

325 lines
9.0 KiB
Tal
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( femto.tal )
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( )
( requires terminal to be in raw mode )
( see femto launcher script for more details )
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|00 @System [ &vector $2 &wst $1 &rst $1 &pad $4 &r $2 &g $2 &b $2 &debug $1 &halt $1 ]
|10 @Console [ &vector $2 &read $1 &pad $5 &write $1 &error $1 ]
|a0 @File [ &vector $2 &success $2 &stat $2 &delete $1 &append $1 &name $2 &length $2 &read $2 &write $2 ]
%dbg { #ff .System/debug DEO }
%emit { .Console/write DEO }
%sp { #2018 DEO }
%nl { #0a18 DEO }
%cr { #0d18 DEO }
%exit { #01 .System/halt DEO BRK }
%ansi { #1b18 DEO #5b18 DEO }
%WIDTH { #50 }
%LAST-COL { #4f }
%PEN-COL { #4e }
%HEIGHT { #18 }
%LAST-LINE { #17 }
%PEN-LINE { #16 }
( useful ASCII )
( - ESC 1b )
( - '[' 5b )
( - )
( ANSI sequences )
( goto $row,$col ESC [ $row ; $col H )
( goto home ESC [ H )
( go up ESC [ A )
( go down ESC [ B )
( go right ESC [ C )
( go left ESC [ D )
( )
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( all scroll on ESC [ r )
( region scroll on ESC [ $y0 ; $y1 r )
( scroll down ESC D )
( scroll up ESC M )
( )
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( erase cur->eol ESC [ K )
( erase cur->sol ESC [ 1 K )
( erase line ESC [ 2 K )
( erase line->bot ESC [ J )
( erase line->top ESC [ 1 J )
( erase all ESC [ 2 J )
( )
( set attrs ESC [ $at1 ; ... m )
( reset ESC [ m )
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( 0 reset, 1 bright, 2 dim, )
( 4 underscore, 5 blink, )
( 7 reverse, 8 hidden )
( )
( fg (30-37), bg (40-47) )
( black, red, green, yellow, )
( blue, magenta, cyan, white )
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|0100
;demo-path .File/name DEO2
#8000 .File/length DEO2
;buffer/data .File/read DEO2
.File/success DEI2 #0000 GTH2 ,&ok JCN
;input-error ;println JSR2 nl exit
&ok
.File/success DEI2 ;buffer/data ADD2 ;buffer/limit STA2
;on-key .Console/vector DEO2
;draw-all JSR2
BRK
@bol
#00 ;cursor/col STA
;draw-cursor JSR2 BRK
( FIXME: handle long lines )
@eol
;cur-line JSR2 ;line-len JSR2 NIP ;cursor/col STA
;draw-cursor JSR2 BRK
( FIXME: handle long lines )
@forward
;cursor/col LDA PEN-COL GTH ,&skip JCN
;cursor/col LDA #01 ADD ;cursor/col STA
;draw-cursor JSR2
&skip BRK
( FIXME: handle long lines )
@back
;cursor/col LDA #01 LTH ,&skip JCN
;cursor/col LDA #01 SUB ;cursor/col STA
;draw-cursor JSR2
&skip BRK
@up
;cursor/row LDA #01 LTH ,&screen-up JCN
;cursor/row LDA #01 SUB ;cursor/row STA
;draw-cursor JSR2 BRK
&screen-up
;buffer/offset LDA2 DUP2 ;buffer/data EQU2 ,&done JCN
#0001 SUB2
&loop DUP2 ;buffer/data EQU2 ,&complete JCN
#0001 SUB2 LDAk #0a NEQ ,&loop JCN
INC2
&complete ;buffer/offset STA2 ;draw-all JSR2 BRK
&done POP2 BRK
( FIXME: need to handle 'end of buffer' stuff )
@down
;cursor/row LDA PEN-LINE GTH ,&screen-down JCN
;cursor/row LDA #01 ADD ;cursor/row STA
;draw-cursor JSR2 BRK
&screen-down
#00 ;rel-line JSR2 ;line-len JSR2 INC2 ( add 1 for line ending )
;buffer/offset LDA2 ADD2
;buffer/offset STA2
;draw-all JSR2
BRK
@quit exit
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@ignore BRK
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@die #00 #00 DIV
@insert ( c^ -> )
;cursor/col LDA PEN-COL GTH ,&skip JCN ( FIXME )
;cur-pos JSR2 ;shift-right JSR2
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;cursor/col LDA INC ;cursor/col STA
;draw-all JSR2
&skip BRK
@overwrite ( c^ -> )
;cursor/col LDA PEN-COL GTH ,&skip JCN ( FIXME )
;cur-pos JSR2 STA
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;cursor/col LDA #01 ADD ;cursor/col STA
;draw-all JSR2
&skip BRK
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@newline ( c^ -> )
#0a ;cur-pos JSR2 ;shift-right JSR2
#00 ;cursor/col STA
;cursor/row LDA INC ;cursor/row STA
;draw-all JSR2
BRK
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@backspace ( -> )
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;cur-pos JSR2 ;buffer/data EQU2 ,&skip JCN
;cursor/col LDA #00 EQU ,&prev-line JCN
;cursor/col LDA #01 SUB ;cursor/col STA
,&finish JMP
&prev-line
;cursor/row LDA #01 SUB ;cursor/row STA
;cur-len JSR2 NIP ;cursor/col STA
&finish
;cur-pos JSR2 ;shift-left JSR2
;draw-all JSR2
&skip BRK
( there's at least one bug -- join lots of lines near start )
@delete ( -> )
;last-pos JSR2 #0001 SUB2
;cur-pos JSR2 LTH2k ,&skip JCN
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;cur-pos JSR2 ;shift-left JSR2
;draw-all JSR2
&skip BRK
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( TODO: tab? )
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@on-key
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.Console/read DEI #01 EQU ( C-a ) ;bol JCN2
.Console/read DEI #02 EQU ( C-b ) ;back JCN2
.Console/read DEI #04 EQU ( C-d ) ;delete JCN2
.Console/read DEI #05 EQU ( C-e ) ;eol JCN2
.Console/read DEI #06 EQU ( C-f ) ;forward JCN2
.Console/read DEI #0d EQU ( \r ) ;newline JCN2
.Console/read DEI #0e EQU ( C-n ) ;down JCN2
.Console/read DEI #10 EQU ( C-p ) ;up JCN2
.Console/read DEI #18 EQU ( C-x ) ;quit JCN2
.Console/read DEI #7f EQU ( DEL ) ;backspace JCN2
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.Console/read DEI #20 LTH ;ignore JCN2 ( ignore for now )
.Console/read DEI #7e GTH ;ignore JCN2 ( ignore for now )
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.Console/read DEI ( printable ASCII ) ;insert JMP2
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BRK
@min ( x^ y^ -> min^ )
LTHk JMP SWP POP JMP2r
@draw-cursor
ansi ;get-row JSR2 INC ;emit-dec JSR2
LIT '; emit ;get-col JSR2 INC ;emit-dec JSR2
LIT 'H emit JMP2r
@draw-all
ansi LIT '2 emit LIT 'J emit
ansi LIT 'H emit
#00 STH
;buffer/offset LDA2
&loop
LDAk #00 EQU ,&eof JCN
LDAk #0a EQU ,&eol JCN
LDAk emit INC2 ,&loop JMP
&eol INCr STHkr LAST-LINE ( #17 ) GTH ,&eof JCN
cr nl INC2 ,&loop JMP
&eof POP2 POPr
;draw-cursor JSR2
JMP2r
@println ( s* -> )
&loop LDAk #00 EQU ,&eof JCN
LDAk #18 DEO INC2 ,&loop JMP
&eof POP2 JMP2r
@cur-len ( -> n* )
;cur-line JSR2 ;line-len JSR2 JMP2r
@line-len ( s* -> n* )
#0000 STH2
&loop LDAk #00 EQU ,&end JCN
LDAk #0a EQU ,&end JCN
INC2 INC2r ,&loop JMP
&end POP2 STH2r JMP2r
( line number relative to the offset, starting at 0 )
@rel-line ( y^ -> s* )
#00 SWP SUB STH ( [-y] )
;buffer/offset LDA2 ( addr* )
&newline ( addr [-y] )
STHkr ,&loop JCN ,&done JMP
&loop ( addr [-y] )
LDAk #00 EQU ,&not-found JCN ( addr [-y] )
LDAk #0a EQU ,&found JCN ( addr [-y] )
INC2 ,&loop JMP ( addr+1 [-y] )
&found INC2 INCr ( addr+1 [-y+1] ) ,&newline JMP
&done POPr JMP2r
&not-found #00 #00 DIV
@cur-line ( -> s* )
;cursor/row LDA ;rel-line JSR2 JMP2r
@cur-pos ( -> s* )
;cur-line JSR2 #00 ;get-col JSR2 ADD2 JMP2r
@shift-right ( c^ addr* -> )
ROT STH ( addr [prev^] )
;buffer/limit LDA2 ( addr limit [prev^] )
#0001 SUB2 SWP2 ( last addr [prev^] )
&loop LTH2k ,&done JCN ( last addr [prev^] )
LDAk STH SWPr ( last addr [prev^ curr^] )
DUP2 STHr ( last addr addr prev^ [curr^] )
ROT ROT STA ( last addr [curr^] )
INC2 ,&loop JMP ( last addr+1 [curr^] )
&done NIP2 DUP2 ( addr addr [prev^] )
STHr ROT ROT ( addr prev^ addr )
STA INC2 ( addr+1 )
;buffer/limit STA2 ( )
JMP2r
@shift-left ( addr* -> )
;buffer/limit LDA2 ( addr limit )
#0001 SUB2 SWP2 ( last addr )
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&loop GTH2k ,&next JCN ( last addr )
,&done JMP ( last addr )
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&next DUP2 INC2 LDAk ( last addr addr+1 c1^ )
STH SWP2 STHr ( last addr+1 addr c1^ )
ROT ROT ( last addr+1 c1^ addr )
STA ,&loop JMP ( last addr+1 )
&done POP2 ( last )
;buffer/limit STA2 ( )
JMP2r
@input-error "input 20 "error 00
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@demo-path "math32.tal 00
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( col is 0-79, row is 0-23 )
@cursor [ &col 00 &row 00 ]
@get-col
;cursor/col LDA ;cur-len JSR2 NIP ;min JSR2 JMP2r
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@get-row
;cursor/row LDA JMP2r
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@last-pos
;buffer/limit LDA2 #0001 SUB2 JMP2r
(
@doc-start ( -> s* ) ;buffer/data JMP2r
@doc-limit ( -> s* ) ;buffer/limit LDA2 JMP2r
@doc-last ( -> s* ) ;buffer/limit LDA2 #0001 SUB2 JMP2r
@page-start ( -> s* ) ;buffer/offset LDA2 JMP2r
@page-limit ( -> s* ) HEIGHT ;rel-line JSR2 JMP2r
@page-last ( -> s* ) HEIGHT ;rel-line JSR2 #0001 SUB2 JMP2r
@line-start ( -> s* ) ;cursor/row LDA ;rel-line JSR2 JMP2r
@line-limit ( -> s* ) ;cursor/row LDA INC ;rel-line JSR2 JMP2r
@line-last ( -> s* ) ;cursor/row LDA INC ;rel-line JSR2 #0001 SUB2 JMP2r
)
@mod-div ( x^ y^ -> x%d x/y )
DIVk ( x y x/y ) STHk ( x y x/y [x/y] ) MUL ( x y*x/y [x/y] )
SUB ( x%y [x/y] ) STHr ( x%y x/y ) JMP2r
@emit-digit ( n^ -> )
LIT '0 ADD emit JMP2r
@emit-dec ( n^ -> )
DUP #63 GTH ,&do3 JCN
DUP #09 GTH ,&do2 JCN
,&do1 JMP
&do3 #64 ;mod-div JSR2 ;emit-digit JSR2
&do2 #0a ;mod-div JSR2 ;emit-digit JSR2
&do1 ;emit-digit JSR2 JMP2r
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|1ffc
( offset is address of the first visible line )
( size is total size of data in bytes )
@buffer [ &limit 0000 &offset :buffer/data &data $8000 ]