kodiak/cards.tal

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( cards.tal )
( CARD LAYOUT )
( )
( cards are stored as 16-bit values. )
( the high byte holds the flags. )
( the low byte holds the card id. )
( )
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( NOTE: this layout predates the one used by kodiak.tal )
( so, that file has functions to convert from its )
( card representation to this one for looking up tiles. )
( )
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( FLAGS )
( bit 1: flipping, #80 face down, #00 face up )
( bits 2-6: unused )
( bits 7-8: rotation, #00 north, #01 east, #02 south, #03 west )
( )
( IDENTIFIER )
( 00: ace of spades )
( 01: two of spades )
( ... )
( 0c: king of spades )
( 0d: ace of hearts )
( 0e: two of hearts )
( ... )
( 19: king of hearts )
( 1a: ace of diamonds )
( 1b: two of diamonds )
( ... )
( 26: king of diamonds )
( 27: ace of clubs )
( 28: two of clubs )
( 33: king of clubs )
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@set-fg ( -> ) #40 ,set-sprite/layer STR JMP2r
@set-bg ( -> ) #00 ,set-sprite/layer STR JMP2r
@set-sprite ( byte^ -> )
LIT [ &layer 00 ] ORA .Screen/sprite DEO JMP2r
@set-sprite-3x ( byte^ -> )
,set-sprite/layer LDR ORA .Screen/sprite DEOk DEOk DEO JMP2r
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@draw-background ( -> )
#f2 .Screen/auto DEO
;tiles #0200 ADD2 .Screen/addr DEO2
#0080 .Screen/x DEO2
draw-background/twice
#0000 .Screen/x DEO2
&twice
#0000 .Screen/y DEO2
#81 .Screen/sprite
DEOk DEOk DEOk DEOk DEOk DEOk DEOk DEOk
DEOk DEOk DEOk DEOk DEOk DEOk DEOk DEOk
DEOk DEOk DEOk DEOk DEOk DEOk DEOk DEO JMP2r
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@draw-spot-down ( -> )
#16 .Screen/auto DEO ( ; draw 2 tiles, increment x and addr )
;masks #0100 ADD2 .Screen/addr DEO2
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#8d set-sprite-3x
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JMP2r
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( assumes x/y already set )
@draw-mask-down ( -> )
#16 .Screen/auto DEO ( ; draw 2 tiles, increment x and addr )
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;masks #0100 ADD2 .Screen/addr DEO2
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#86 set-sprite-3x ( TODO fixme )
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JMP2r
( assumes x/y already set )
@draw-face-down ( -> )
#16 .Screen/auto DEO ( ; draw 2 tiles, increment x and addr )
;tiles #0100 ADD2 .Screen/addr DEO2
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#81 set-sprite-3x
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JMP2r
@card-is-red ( idx* -> bool^ )
#000c DIV2
NIP #03 MUL #02 AND JMP2r ( [q*3]&2 )
@find-middle-addr ( idx* -> addr* )
#000d DIV2k STH2k MUL2 SUB2 ( r* [q*] )
DUP2 #000a LTH2 ?&normal
DUP2 #000a NEQ2 ?&not-j POP2 #0200 !&face
&not-j #000b NEQ2 ?&not-q #0100 !&face
&not-q #0000
&face ;tiles ADD2 #00c0 ADD2
STH2r card-is-red ?&is-red JMP2r
&is-red #0020 ADD2 JMP2r
&normal POP2 POP2r ;tiles #0020 ADD2 JMP2r
( assumes x/y already set )
@draw-mask-up ( idx* -> )
#16 .Screen/auto DEO ( ; draw 2 tiles, increment x and addr )
#00ff AND2 ( idx* ; remove rotation/flip info for now )
DUP2 ( idx* idx* )
#000d DIV2k STH2k MUL2 SUB2 ( idx* r* [q*] )
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#0100 MUL2 ;masks #0300 ADD2 ( idx* 128r* card+384* [q*] )
ADD2 STH2r #0020 MUL2 ADD2 ( idx* a=card+384+128r+16q* )
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STH2k .Screen/addr DEO2 ( idx* [a*] )
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#86 set-sprite ( idx* [a*] ; draw top of card )
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find-middle-addr ( mid* [a*] )
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;tiles SUB2 ;masks ADD2
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.Screen/addr DEO2 ( [a*] )
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#86 set-sprite ( [a*] ; draw middle of card )
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STH2r DUP2 #0010 ADD2 ( a* a+8* )
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SWP2 #0008 .Screen/x DEI2 ADD2 .Screen/x DEO2
.Screen/addr DEO2 ( )
#01 .Screen/auto DEO ( ; draw 1 tile, increment x )
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#b6 set-sprite ( ; draw bottom left of card )
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.Screen/addr DEO2 ( )
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#b6 set-sprite ( ; draw bottom right of card )
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JMP2r
( assumes x/y already set )
@draw-face-up ( idx* -> )
#16 .Screen/auto DEO ( ; draw 2 tiles, increment x and addr )
#00ff AND2 ( idx* ; remove rotation/flip info for now )
DUP2 ( idx* idx* )
#000d DIV2k STH2k MUL2 SUB2 ( idx* r* [q*] )
#0100 MUL2 ;tiles #0300 ADD2 ( idx* 256r* card+768* [q*] )
ADD2 STH2r #0020 MUL2 ADD2 ( idx* a=card+768+256r+32q* )
STH2k .Screen/addr DEO2 ( idx* [a*] )
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#81 set-sprite ( idx* [a*] ; draw top of card )
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find-middle-addr ( mid* [a*] )
.Screen/addr DEO2 ( [a*] )
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#81 set-sprite ( [a*] ; draw middle of card )
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STH2r DUP2 #0010 ADD2 ( a* a+16* )
SWP2 #0008 .Screen/x DEI2 ADD2 .Screen/x DEO2
.Screen/addr DEO2 ( )
#01 .Screen/auto DEO ( ; draw 1 tile, increment x )
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#b1 set-sprite ( ; draw bottom left of card )
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.Screen/addr DEO2 ( )
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#b1 set-sprite ( ; draw bottom right of card )
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JMP2r
@init-rng-from-datetime ( -> )
#00 .DateTime/dow #5180 MUL2
#00 .DateTime/hr DEI #0e10 MUL2 ADD2
#00 .DateTime/min DEI #003c MUL2 ADD2
#00 .DateTime/sec DEI ADD2 ( s* )
DUP2 .DateTime/doy DEI2 EOR2 ( s* sdoy* )
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#0001 ROT2 OVR2 ( y* 1* x* 1* )
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ORA2 ;rng-x STA2 ( y* 1* )
ORA2 ;rng-x STA2 JMP2r ( )
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@random ( -> x* )
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;rng-x LDA2 DUP2 #50 SFT2 EOR2 ( t=x^[x<<5]* )
;rng-y LDA2 DUP2 ;rng-x STA2 ( t* y* ; x<-y )
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DUP2 #01 SFT2 EOR2 ( t* u=y^[y>>1]* )
SWP2 DUP2 #03 SFT2 EOR2 ( u* v=t^[t>>3]* )
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EOR2 DUP2 ;rng-y STA2 JMP2r ( u^v* ; y<-u^v )
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( 52 cards x 4 bytes per card = 208 bytes )
( each card has: )
( )
( - byte 1: flags )
( - byte 2: card suit/value )
( - byte 3: x position )
( - byte 4: y position )
@cursor 80c0 e0f0 f8e0 1000
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( @cursox 7f3f 1f0f 071f efff )
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@blank 0000 0000 0000 0000
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( @rng &x $2 &y $2 )
@rng-x $2
@rng-y $2
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( each tile is 16 bytes: a 2-bit 8x8 image )
@tiles ~card-sprites.tal
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( each mask tile is 16 bytes: a 2-bit 8x8 image )
@masks ~mask2.tal