nxu/femto.tal

263 lines
7.1 KiB
Tal
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2022-02-06 17:07:11 -05:00
( femto.tal )
|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 )
( )
( 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 )
|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
@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
@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
@ignore BRK
@die #00 #00 DIV
@insert ( c^ -> )
;cursor/col LDA PEN-COL GTH ,&skip JCN ( FIXME )
;cur-pos JSR2 ;shift-right JSR2
;cursor/col LDA #01 ADD ;cursor/col STA
;draw-all JSR2
&skip BRK
( FIXME: this is broken, shift-left in particular )
@backspace ( -> )
;cursor/col LDA #00 EQU ,&skip JCN
;cursor/col LDA #01 SUB ;cursor/col STA
;cur-pos JSR2 ;shift-left JSR2
;draw-all JSR2
&skip BRK
@on-key
.Console/read DEI #01 EQU ;bol JCN2
.Console/read DEI #02 EQU ;back JCN2
.Console/read DEI #05 EQU ;eol JCN2
.Console/read DEI #06 EQU ;forward JCN2
.Console/read DEI #0e EQU ;down JCN2
.Console/read DEI #10 EQU ;up JCN2
.Console/read DEI #18 EQU ;quit JCN2
.Console/read DEI #7f EQU ;backspace JCN2
.Console/read DEI #20 LTH ;ignore JCN2 ( ignore for now )
.Console/read DEI #7e GTH ;ignore JCN2 ( ignore for now )
.Console/read DEI ;insert JMP2
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/data )
;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
@first-line ( -> s* )
;buffer/offset LDA2 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 )
&loop GTHk ,&next JCN ( last addr )
,&done JMP ( last addr )
&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
@demo-path "math32.txt 00
( 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
@get-row
;cursor/row LDA JMP2r
|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 ]