mirror of https://git.sr.ht/~rabbits/uxn
Merge branch 'main' of git.sr.ht:~rabbits/uxn
This commit is contained in:
neauoire
commit
45a7941d7d
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@ -0,0 +1,111 @@
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@load-rom ( filename* -- )
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(
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Attempts to load the ROM from filename* and executes it. If the file exists
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and has non-zero length, this function does not return, because the new ROM
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is executing in its place.
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The screen and both stacks are cleared and all the device vectors are
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written to zero as a convenience. All other device bytes are left
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untouched, so they could introduce a device state to the next ROM that
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it's not expecting.
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)
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.File/name DEO2
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#0000 .File/offset-hs DEO2
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#0000 .File/offset-ls DEO2
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( return if file can't be found, or zero length )
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#0001 .File/length DEO2
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;&tmp .File/load DEO2
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.File/success DEI2 ORA JMP JMP2r
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( clear wst )
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#ab
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&wst-loop
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POP
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.System/wst STH DEIr STHr #01 GTH ,&wst-loop JCN
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( clear rst )
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LITr ab
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&rst-loop
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POPr
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.System/rst DEI ,&rst-loop JCN
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( clear screen )
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#01 .Screen/auto DEO
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#0000 .Screen/y DEO2
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.Screen/width DEI2 #0007 ADD2 #03 SFT2 #ffff MUL2 STH2
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&screen-yloop
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#0000 .Screen/x DEO2
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STH2kr
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&screen-xloop-bg
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#00 .Screen/sprite DEO
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INC2
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ORAk ,&screen-xloop-bg JCN
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POP2
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#0000 .Screen/x DEO2
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STH2kr
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&screen-xloop-fg
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#40 .Screen/sprite DEO
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INC2
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ORAk ,&screen-xloop-fg JCN
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POP2
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.Screen/y DEI2 #0008 ADD2
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DUP2 .Screen/y DEO2
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.Screen/height DEI2 LTH2 ,&screen-yloop JCN
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POP2r
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#00 .Screen/auto DEO
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( reset device vectors )
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LIT2r 0000 #00
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&device-vector-loop
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DUP2r STHk DEO2r
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#10 ADD
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DUP ,&device-vector-loop JCN
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POP POP2r
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( copy the zero-page-loader into f0-ff )
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;&zero-page-loader LIT2r 00f0
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©-loop
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LDAk STH2kr STA
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INC2 INC2r
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STHkr ,©-loop JCN
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POP2 NIPr ( leave 00 on return stack )
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( prepare the stack for the zero-page-loader )
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( the more we prepare here in advance, the less we'll have to overwrite )
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STHkr DUPk #fe ( arguments for STA2 at ff )
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OVR2 ( argument for JMP at fe (carry on), plus an extra zero )
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DUP2 #fcfe ( arguments for STA2 at fd and JMP (repeat) )
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OVR2 STHkr #fafe ( arguments for STA2 at fd and JMP (repeat) )
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OVR2 STHkr #f8fe ( arguments for STA2 at fd and JMP (repeat) )
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OVR2 STHkr #f6fe ( arguments for STA2 at fd and JMP (repeat) )
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OVR2 STHkr #f4fe ( arguments for STA2 at fd and JMP (repeat) )
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OVR2 STHkr #f2fe ( arguments for STA2 at fd and JMP (repeat) )
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OVR2 STHkr #f001 ( arguments for STA2 at fd, plus an extra 01 )
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STHkr ( first argument for ADD2 )
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.File/success ( argument for DEI2 )
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#0100 .File/load ( arguments for DEO2 )
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#ff00 .File/length DEO2
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#00f0 JMP2
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&zero-page-loader
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( f0 ) DEO2
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( f1 ) DEI2
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( f2 ) ADD2
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( f3 ) &loop DUPr
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( f4 ) STH2k
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( f5 ) STAr
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( f6 ) INC2
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( f7 ) NEQ2k
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( f8 ) ,&loop
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( f9 )
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( fa ) JCN
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( fb ) POPr
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( fc ) POP2
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( fd ) STA2 ( deletes f0-fd through looping )
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( fe ) JMP
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( ff ) STA2 ( deletes fe-ff )
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&tmp $1
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@ -17,9 +17,9 @@
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( devices )
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|00 @System &vector $2 &pad $6 &r $2 &g $2 &b $2
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|00 @System [ &vector $2 &wst $1 &rst $1 &pad $4 &r $2 &g $2 &b $2 &debug $1 &halt $1 ]
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|10 @Console [ &vector $2 &read $1 &pad $5 &write $1 &error $1 ]
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|20 @Screen &vector $2 &width $2 &height $2 &pad $2 &x $2 &y $2 &addr $2 &pixel $1 &sprite $1
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|20 @Screen &vector $2 &width $2 &height $2 &auto $1 &pad $1 &x $2 &y $2 &addr $2 &pixel $1 &sprite $1
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|80 @Controller [ &vector $2 &button $1 &key $1 ]
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|90 @Mouse [ &vector $2 &x $2 &y $2 &state $1 &wheel $1 ]
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|a0 @File &vector $2 &success $2 &offset-hs $2 &offset-ls $2 &name $2 &length $2 &load $2 &save $2
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@ -106,7 +106,7 @@ BRK
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RTN
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&validate ( -- )
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;input ;launch JSR2
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;input ;load-rom JSR2
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#00 ,&draw JSR
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( null ) #0000 ;input STA2
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RTN
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@ -134,14 +134,6 @@ BRK
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RTN
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@launch ( path* -- )
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POP2
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#0020 #00e0 ;error-txt #08 ;draw-label JSR2
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RTN
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@redraw ( -- )
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#0018 #0020 #0040 #0040 ;logo-icn #03 ;draw-icn JSR2
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@ -277,6 +269,8 @@ RTN
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RTN
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include projects/library/load-rom.tal
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@welcome-txt
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"Welcome 20 "to 20 "your 20 "UXN 20 "Ordinator $1
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@today-txt
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@ -158,7 +158,7 @@ redraw(Uxn *u)
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SDL_Rect up = gRect;
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if(devsystem->dat[0xe])
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inspect(&ppu, u->wst.dat, u->wst.ptr, u->rst.ptr, u->ram.dat);
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if(ppu.redraw) {
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if(!reqdraw && ppu.redraw) {
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y0 = ppu.i0 / ppu.stride;
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y1 = ppu.i1 / ppu.stride + 1;
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up.y += y0;
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