Browse code
Basic snake.tal
Devine Lu Linvega authored on 02/11/2021 20:13:59
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+( uxnasm projects/examples/demos/snake.tal bin/snake.rom && uxnemu bin/snake.rom ) |
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+ |
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+%+ { ADD } %- { SUB } %/ { DIV }
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+%< { LTH } %> { GTH } %= { EQU } %! { NEQ }
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+%++ { ADD2 } %-- { SUB2 } %// { DIV2 }
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+%<< { LTH2 } %>> { GTH2 } %== { EQU2 } %!! { NEQ2 }
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+%2/ { #01 SFT } %2* { #10 SFT }
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+%8// { #03 SFT2 } %8** { #30 SFT2 }
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+%MOD { DIVk MUL SUB }
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+%RTN { JMP2r }
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+%TOS { #00 SWP }
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+%SWP? { #01 JCN SWP }
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+%BRK? { #01 JCN BRK }
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+ |
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+%DEBUG { ;print-hex JSR2 #0a .Console/write DEO }
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+%DEBUG2 { SWP ;print-hex JSR2 ;print-hex JSR2 #0a .Console/write DEO }
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+ |
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+( devices ) |
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+ |
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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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+|30 @Audio0 [ &vector $2 &position $2 &output $1 &pad $3 &adsr $2 &length $2 &addr $2 &volume $1 &pitch $1 ] |
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+|80 @Controller [ &vector $2 &button $1 &key $1 ] |
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+|b0 @DateTime [ &year $2 &month $1 &day $1 &hour $1 &minute $1 &second $1 &dotw $1 &doty $2 &isdst $1 ] |
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+ |
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+( variables ) |
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+ |
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+|0000 |
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+ |
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+( program ) |
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+ |
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+@arena |
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+ &w $1 &h $1 &timer $1 |
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+@apple |
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+ &x $1 &y $1 |
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+@snake |
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+ &direction $1 &length $1 |
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+ &x $1 &y $1 |
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+ &tail |
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+ |
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+|0100 ( -> ) |
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+ |
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+ ( theme ) |
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+ #0f2f .System/r DEO2 |
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+ #0ff2 .System/g DEO2 |
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+ #0022 .System/b DEO2 |
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+ |
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+ ( vectors ) |
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+ ;on-frame .Screen/vector DEO2 |
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+ ;on-button .Controller/vector DEO2 |
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+ |
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+ ( resize ) |
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+ #00c0 .Screen/width DEO2 |
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+ #0100 .Screen/height DEO2 |
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+ |
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+ .Screen/width DEI2 8// NIP .arena/w STZ |
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+ .Screen/height DEI2 8// NIP .arena/h STZ |
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+ |
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+ ( put snake ) |
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+ .arena/w LDZ 2/ #01 - .snake/x STZ |
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+ .arena/h LDZ 2/ #01 - .snake/y STZ |
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+ |
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+ ;add-apple JSR2 |
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+ |
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+BRK |
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+ |
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+@on-frame ( -> ) |
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+ |
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+ .arena/timer LDZ INC DUP .arena/timer STZ |
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+ #06 = BRK? |
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+ |
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+ #00 ;draw-snake JSR2 |
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+ ;move JSR2 |
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+ #02 ;draw-snake JSR2 |
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+ |
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+ ( reset ) #00 .arena/timer STZ |
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+ |
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+BRK |
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+ |
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+@on-button ( -> ) |
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+ |
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+ .Controller/button DEI #04 SFT |
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+ DUP #00 = ,&skip JCN |
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+ DUP .snake/direction STZ |
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+ &skip |
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+ POP |
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+ |
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+BRK |
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+ |
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+@move ( -- ) |
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+ |
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+ ( tail ) |
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+ .snake/x LDZ2 STH2 |
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+ .snake/length LDZ #00 |
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+ &loop |
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+ DUP 2* .snake/tail + LDZ2 STH2 |
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+ SWP2r |
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+ DUP 2* .snake/tail + STH2r ROT STZ2 |
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+ INC GTHk ,&loop JCN |
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+ POP2 |
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+ POP2r |
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+ |
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+ .snake/direction LDZ |
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+ DUP #01 ! ,&no-up JCN |
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+ .snake/y LDZ #01 - |
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+ .arena/h LDZ LTHk SWP? POP |
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+ .snake/y STZ |
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+ &no-up |
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+ DUP #02 ! ,&no-down JCN |
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+ .snake/y LDZ INC |
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+ .arena/h LDZ MOD |
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+ .snake/y STZ |
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+ &no-down |
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+ DUP #04 ! ,&no-left JCN |
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+ .snake/x LDZ #01 - |
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+ .arena/w LDZ LTHk SWP? POP |
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+ .snake/x STZ |
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+ &no-left |
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+ DUP #08 ! ,&no-right JCN |
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+ .snake/x LDZ INC |
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+ .arena/w LDZ MOD |
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+ .snake/x STZ |
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+ &no-right |
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+ POP |
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+ |
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+ ( detect collision ) |
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+ .snake/x LDZ .apple/x LDZ ! ,&no-collision JCN |
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+ .snake/y LDZ .apple/y LDZ ! ,&no-collision JCN |
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+ #00 ;draw-apple JSR2 |
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+ .snake/length LDZ INC DUP DEBUG .snake/length STZ |
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+ ;add-apple JSR2 |
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+ ;move JSR2 |
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+ &no-collision |
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+ |
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+RTN |
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+ |
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+@add-apple ( -- ) |
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+ |
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+ ( seed ) |
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+ .DateTime/hour DEI2 .DateTime/minute DEI2 MUL2 #1234 MUL2 + |
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+ .arena/w LDZ MOD .apple/x STZ |
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+ .DateTime/hour DEI2 .DateTime/minute DEI2 MUL2 #abcd MUL2 + |
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+ .arena/h LDZ MOD .apple/y STZ |
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+ |
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+ #03 ;draw-apple JSR2 |
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+ |
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+RTN |
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+ |
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+@draw-snake ( color -- ) |
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+ |
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+ .snake/x LDZ TOS 8** .Screen/x DEO2 |
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+ .snake/y LDZ TOS 8** .Screen/y DEO2 |
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+ ;snake-icns .Screen/addr DEO2 |
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+ STHk .Screen/sprite DEO |
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+ |
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+ ( draw tail ) |
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+ .snake/length LDZ #00 |
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+ &loop |
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+ DUP 2* .snake/tail + LDZ TOS 8** .Screen/x DEO2 |
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+ DUP 2* .snake/tail + INC LDZ TOS 8** .Screen/y DEO2 |
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+ STHkr .Screen/sprite DEO |
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+ INC GTHk ,&loop JCN |
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+ POP2 |
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+ POPr |
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+ |
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+RTN |
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+ |
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+@draw-apple ( color -- ) |
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+ .apple/x LDZ TOS 8** .Screen/x DEO2 |
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+ .apple/y LDZ TOS 8** .Screen/y DEO2 |
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+ ;apple-icn .Screen/addr DEO2 |
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+ .Screen/sprite DEO |
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+ RTN |
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+ |
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+RTN |
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+ |
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+@print-hex ( value -- ) |
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+ |
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+ STHk #04 SFT ,&parse JSR .Console/write DEO |
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+ STHr #0f AND ,&parse JSR .Console/write DEO |
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+ RTN |
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+ &parse ( value -- char ) |
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+ DUP #09 GTH ,&above JCN #30 ADD RTN &above #09 SUB #60 ADD RTN |
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+ |
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+RTN |
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+ |
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+( assets ) |
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+ |
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+@snake-icns |
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+ ffff ffff ffff ffff |
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+@apple-icn |
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+ ffff ffff ffff ffff |
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+ |