mirror of https://git.sr.ht/~rabbits/drifblim
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neauoire
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@ -19,11 +19,4 @@ uxncli bin/drifblim.rom src/drifblim.tal
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If do not wish to assemble it yourself, you can download [drifblim.rom](https://rabbits.srht.site/drifblim/drifblim.rom).
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## TODOs
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- Warn at program limit.
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- Display program size/limit.
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- Display reference memory limit.
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- Display success message.
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_Drifblim is strong enough to lift Pokémon or people but has no control over its flight. This causes it to drift with the wind and end up anywhere._
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@ -29,20 +29,14 @@ BRK
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STH2kr ;scap JSR2 STA POP2r BRK
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&end
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POP
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( begin )
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STH2kr ;assemble JSR2
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;resolve JSR2
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( write rom )
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;&rom-ext STH2kr ;scap JSR2 #0003 SUB2 ;scpy JSR2
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STH2r .File/name DEO2
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.p/len LDZ2 #0100 SUB2 .File/length DEO2
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;dst/clip .File/write DEO2
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#0101 #0e DEO2
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STH2r ;build JSR2
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( debugger )
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#010f DEO
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BRK
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&rom-ext "rom $1
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@assemble ( filename* -- )
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@ -90,7 +84,7 @@ JMP2r
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DUP2 ;slen JSR2 #0004 EQU2 ,&on-short JCN
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DUP2 ;slen JSR2 #0002 EQU2 ,&on-byte JCN
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;err/key ;print-err JMP2
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;str/key ;print-err JMP2
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&on-opcode ;find-opcode JSR2 ;write-byte JMP2
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&on-short ;shex JSR2 ;write-short JMP2
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@ -101,14 +95,14 @@ JMP2r
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.ref/ptr LDZ2 #0000 EQU2 ,&skip JCN
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;refs
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&while
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DUP2 ,resolve-reference JSR
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DUP2 ,resolve-ref JSR
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( eol ) INC2 INC2 ;scap JSR2 INC2 INC2k INC2 LDA ,&while JCN
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POP2
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&skip
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JMP2r
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@resolve-reference ( ref* -- )
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@resolve-ref ( ref* -- )
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STH2k
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INC2 INC2 INC2k ,find-label JSR LDA2 STH2
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@ -119,12 +113,12 @@ JMP2r
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LDAk LIT ': EQU ,&on-rawabs JCN
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POP2r POP2r
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;err/ref ;print-err JMP2
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;str/ref ;print-err JMP2
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&on-litzp STH2r NIP STH2r ,&set-byte JMP
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&on-litrel STH2r STH2kr LDA2 SUB2 #0002 SUB2
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DUP2 #0080 ADD2 POP #00 EQU ,&in-range JCN
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OVR2 INC2 ;err/far ;print-err JSR2
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OVR2 INC2 ;str/far ;print-err JSR2
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&in-range
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NIP STH2r
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&set-byte LDA2 ;dst ADD2 STA POP2 JMP2r
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@ -146,6 +140,23 @@ JMP2r
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JMP2r
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&on-found POP2r JMP2r
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@build ( name* -- )
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;str/rom OVR2 ;scap JSR2 #0003 SUB2 ;scpy JSR2
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DUP2 .File/name DEO2
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.p/len LDZ2 #0100 SUB2 .File/length DEO2
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;dst/clip .File/write DEO2
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( write stats )
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;str/assembled ;print-str JSR2
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;print-str JSR2
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#2818 DEO
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.p/len LDZ2 ;print JSR2
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LIT '/ #18 DEO
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#0000 ;dst SUB2 ;print JSR2
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#2918 DEO #0a18 DEO
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JMP2r
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( runic )
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@do-lithex ( t* -- )
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@ -153,7 +164,7 @@ JMP2r
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DUP2 ;slen JSR2 #0004 EQU2 ,&on-short JCN
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DUP2 ;slen JSR2 #0002 EQU2 ,&on-byte JCN
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;err/lit ;print-err JMP2
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;str/lit ;print-err JMP2
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&on-short ;shex JSR2 ;write-litshort JMP2
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&on-byte ;shex JSR2 NIP ;write-litbyte JMP2
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@ -161,7 +172,7 @@ JMP2r
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@create-label ( name* -- )
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DUP2 ;find-label JSR2 #ffff EQU2 ,&unique JCN
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DUP2 ;err/dup ;print-err JSR2
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DUP2 ;str/dup ;print-err JSR2
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&unique
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( write ref )
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.p/ptr LDZ2 ;syms .sym/ptr LDZ2 STH2k ADD2 STA2
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@ -281,7 +292,7 @@ JMP2r
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@shex ( str* -- short* )
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DUP2 ,sihx JSR ,&valid JCN
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DUP2 ;err/hex ;print-err JSR2
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;str/hex ;print-err JSR2 #0000 JMP2r
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&valid
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LIT2r 0000
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&while
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@ -366,13 +377,22 @@ JMP2r
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JMP2r
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@print ( short* -- )
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&short ( short* -- ) SWP ,&byte JSR
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&byte ( byte -- ) DUP #04 SFT ,&char JSR
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&char ( char -- ) #0f AND DUP #09 GTH #27 MUL ADD #30 ADD #18 DEO
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JMP2r
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@print-err ( token* err* -- )
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;err ,print-str JSR
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;&error-txt ,print-str JSR
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,print-str JSR #2018 DEO
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,print-str JSR #0a18 DEO
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JMP2r
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&error-txt "-- 20 $1
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@print-str ( str* -- )
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@ -390,10 +410,11 @@ JMP2r
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"ADD "SUB "MUL "DIV "AND "ORA "EOR "SFT
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&brk "BRK
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@err
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"--error: $1
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@str
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&hex "hex $1 &lit "lit $1 &dup "dup $1
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&far "far $1 &ref "ref $1 &key "key $1
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&rom "rom $1
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&assembled "Assembled 20 $1
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@runes
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'| :do-padabs '$ :do-padrel '@ :do-plabel '& :do-slabel
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@ -403,7 +424,7 @@ JMP2r
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( buffers )
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@syms $4000 ( addr* name* )
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@refs $4000 ( addr* name* )
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@syms $3000 ( addr* name* )
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@refs $3000 ( addr* name* )
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@dst $0100 ( zero-page )
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&clip ( program )
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