it kind of works
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maze.tal
67
maze.tal
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@ -24,10 +24,11 @@
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%ROWS { #0027 } ( rows of cells )
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%COLS { #003f } ( columns of cells )
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%MAZEROWS { ROWS #0003 SUB2 #0002 DIV2 }
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%MAZECOLS { COLS #0003 SUB2 #0002 DIV2 }
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( %MAZEROWS { ROWS INC2 #0002 DIV2 }
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%MAZECOLS { COLS INC2 #0002 DIV2 } )
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%CELLS { ROWS COLS MUL2 }
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( %MAZEROWS { ROWS #0003 SUB2 #0002 DIV2 }
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%MAZECOLS { COLS #0003 SUB2 #0002 DIV2 } )
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%MAZEROWS { ROWS INC2 #0002 DIV2 }
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%MAZECOLS { COLS INC2 #0002 DIV2 }
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%NORTH { COLS NEGATE2 }
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%EAST { #0001 }
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%SOUTH { COLS }
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@ -39,7 +40,8 @@
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%XSTORE { ROT ROT STORE } ( cell* val -> )
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%IS-OPEN { LOAD #01 AND }
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%UNSEEN { LOAD #02 AND #00 EQU } ( cell* -> bool^ )
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%PATH { ADD2 #0002 DIV2 } ( cell1* cell2* -> cell3* )
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( %PATH { ADD2 #0002 DIV2 } ( cell1* cell2* -> cell3* ) )
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%PATH { ADD2 #01 SFT2 } ( cell1* cell2* -> cell3* )
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%DIGIT { #00 SWP ;digits ADD2 LDA EMIT }
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%EMIT-BYTE { DUP #04 SFT DIGIT #0f AND DIGIT }
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@ -118,7 +120,7 @@
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;clear-maze JSR2
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( we mark the border as having been seen to simplify bounds checking )
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;mark-border JSR2
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( ;mark-border JSR2 )
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( generate the maze )
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;create-maze JSR2
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@ -144,7 +146,7 @@ BRK
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( if regenerate was true, then create a new maze )
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#00 .regenerate STZ
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;clear-maze JSR2
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;mark-border JSR2
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( ;mark-border JSR2 )
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;create-maze JSR2
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;create-exits JSR2
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;draw-maze JSR2
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@ -275,6 +277,7 @@ RTN
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#01 XSTORE SOUTH ADD2 #01 XSTORE
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RTN
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( initialize the entire maze memory to 0 values )
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@clear-maze ( -> )
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ROWS COLS MUL2 ( limit* )
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#0000 #0000 CELL ( limit* cell* )
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@ -287,20 +290,42 @@ RTN
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( a move is illegal if it changes both x and y. )
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( that occurs when the player wraps around the border. )
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@illegal-move ( cell* -> bool^ )
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DUP2 CELLS LTH2 ,&inbounds JCN POP2 #01 RTN
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&inbounds
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DUP2
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DUP2
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COLS MOD2 ;focus LDA2 COLS MOD2 NEQ2 STH
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ROWS DIV2 ;focus LDA2 ROWS DIV2 NEQ2 STHr
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COLS DIV2 ;focus LDA2 COLS DIV2 NEQ2 STHr
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AND
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RTN
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STHk #20 ADD EMIT SPACE EMIT-SHORT SPACE ;focus LDA2 EMIT-SHORT NEWLINE STHr
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RTN
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@log-focus
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EMIT SPACE ;focus LDA2 EMIT-SHORT NEWLINE RTN
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@xstore
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ROT ROT STORE RTN
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@is-unseen ( cell* -> bool^ )
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DUP2
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LOAD
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DUP EMIT-BYTE SPACE
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#02 AND #00 EQU
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STHk #30 ADD EMIT SPACE EMIT-SHORT NEWLINE STHr
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RTN
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@create-maze ( -> )
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( create starting pt, must have even coords )
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;random-short JSR2 MAZEROWS MOD2 INC2 #0002 MUL2 ( row* )
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;random-short JSR2 MAZECOLS MOD2 INC2 #0002 MUL2 ( row* col* )
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( ;random-short JSR2 MAZEROWS MOD2 INC2 #0002 MUL2 ( row* )
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;random-short JSR2 MAZECOLS MOD2 INC2 #0002 MUL2 ( row* col* ) )
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( ;random-short JSR2 MAZEROWS MOD2 #0002 MUL2 ( row* )
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;random-short JSR2 MAZECOLS MOD2 #0002 MUL2 ( row* col* ) )
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#0000 #0000
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CELL DUP2 ;focus STA2 ( cell* )
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#07 XSTORE ( )
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&queue ( )
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#3f ;log-focus JSR2
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;shuffle-directions JSR2 ( )
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#00 ( i^ )
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@ -309,7 +334,7 @@ RTN
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DUP #02 MUL .cell-offsets ADD LDZ2 ( i^ d^ off* )
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DUP2 ;focus LDA2 ADD2 ADD2 ( i^ d^ cell2* )
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DUP2 ;illegal-move JSR2 ,¬found JCN
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DUP2 UNSEEN ( i^ d^ cell2* unseen^ )
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DUP2 ;is-unseen JSR2 ( i^ d^ cell2* unseen^ )
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,&found JCN ( i^ d^ cell2* )
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¬found
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POP2 POP INC ( j=i+1 )
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@ -317,13 +342,14 @@ RTN
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,&search JCN ( j^ )
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POP ( )
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,&backtrack JMP ( )
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,&done JMP ( )
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&found ( addr^ d^ cell2* )
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DUP2 #01 XSTORE
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#2a ;log-focus JSR2
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DUP2 #01 ( XSTORE ) ;xstore JSR2
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DUP2 ;focus LDA2 PATH ( addr^ d^ cell2* wall* )
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#01 XSTORE ( addr^ d^ cell2* )
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#01 ( XSTORE ) ;xstore JSR2 ( addr^ d^ cell2* )
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;focus STA2 ( addr^ d^ )
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#3e ;log-focus JSR2
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#02 EOR #08 MUL ( addr^ link^ )
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#03 ORA ;focus LDA2 ( addr^ data^ cell* )
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STORE ( addr^ )
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@ -335,6 +361,7 @@ RTN
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;focus LDA2 OVR2 ( offset* cell* offset* )
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ADD2 ADD2 ( old-cell* )
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DUP2 ;focus STA2 ( old-cell* )
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#3c ;log-focus JSR2
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LOAD #04 AND #00 NEQ ( is-start^ )
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,&done JCN
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;&queue JMP2
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@ -387,6 +414,11 @@ RTN
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POP
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RTN
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( convenience for less branching when printing hex )
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@digits
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30 31 32 33 34 35 36 37
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38 39 61 62 63 64 65 66
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|8000
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( 64x40 cells = 2560 bytes )
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@ -401,8 +433,3 @@ RTN
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( we use the link to support backtracking without )
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( needing a separate stack. )
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@maze $2560
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( convenience for less branching when printing hex )
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@digits
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30 31 32 33 34 35 36 37
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38 39 61 62 63 64 65 66
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