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forth: Forth-ify "ABORT"
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@ -117,10 +117,12 @@ JUMPTBL:
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jp nativeWord
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jp next
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jp chkPS
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; 24
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NUMBER:
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.dw numberWord
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LIT:
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.dw litWord
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.dw INITIAL_SP
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; *** Code ***
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forthMain:
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@ -130,7 +132,7 @@ forthMain:
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; ourselves a nice 6 bytes buffer. 6 bytes because we seldom have words
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; requiring more than 3 items from the stack. Then, at each "exit" call
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; we check for stack underflow.
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push af \ push af \ push af
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ld sp, 0xfffa
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ld (INITIAL_SP), sp
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ld ix, RS_ADDR
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; LATEST is a label to the latest entry of the dict. This can be
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@ -185,7 +187,7 @@ INTERPRET:
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.dw DROP
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.dw EXECUTE
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.fill 43
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.fill 41
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; *** Collapse OS lib copy ***
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; In the process of Forth-ifying Collapse OS, apps will be slowly rewritten to
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@ -650,20 +652,6 @@ QUIT:
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ld ix, RS_ADDR
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jp next
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.db "ABORT"
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.dw $-QUIT
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.db 5
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ABORT:
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.dw compiledWord
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.dw .private
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.dw QUIT
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.private:
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.dw nativeWord
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; Reinitialize PS
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ld sp, (INITIAL_SP)
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jp next
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abortUnderflow:
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ld hl, .name
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call find
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@ -672,10 +660,10 @@ abortUnderflow:
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.name:
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.db "(uflw)", 0
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.fill 18
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.fill 41
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.db "BYE"
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.dw $-ABORT
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.dw $-QUIT
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.db 3
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BYE:
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.dw nativeWord
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@ -49,6 +49,8 @@
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, ( write! )
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; IMMEDIATE
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: ABORT _c (resSP) QUIT ;
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: INTERPRET
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BEGIN
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WORD
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@ -71,7 +73,7 @@
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( This is only the "early parser" in earlier stages. No need
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for an abort message )
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: (parse)
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(parsed) SKIP? ABORT
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(parsed) SKIP? _c ABORT
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;
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( a -- )
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@ -87,7 +89,7 @@
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;
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: (uflw)
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LIT< stack-underflow _c (print) ABORT
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LIT< stack-underflow _c (print) _c ABORT
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;
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: C,
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@ -32,6 +32,9 @@
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: IY+ _iy+- ;
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: IY- 0 -^ _iy+- ;
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: <<3 8 * ;
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: <<4 16 * ;
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( -- )
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: OP1 CREATE C, DOES> C@ A, ;
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0x76 OP1 HALT,
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@ -48,7 +51,7 @@
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DOES>
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C@ ( r op )
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SWAP ( op r )
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8 * ( op r<<3 )
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<<3 ( op r<<3 )
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OR A,
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;
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0x04 OP1r INCr,
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@ -72,7 +75,7 @@
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DOES>
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C@ ( qq op )
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SWAP ( op qq )
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16 * ( op qq<<4 )
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<<4 ( op qq<<4 )
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OR A,
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;
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0xc5 OP1qq PUSHqq,
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@ -84,7 +87,7 @@
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: _1rr
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C@ ( rd rr op )
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ROT ( rr op rd )
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8 * ( rr op rd<<3 )
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<<3 ( rr op rd<<3 )
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OR OR A,
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;
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@ -125,7 +128,7 @@
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DOES>
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C@ ( r n op )
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ROT ( n op r )
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8 * ( n op r<<3 )
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<<3 ( n op r<<3 )
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OR A, A,
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;
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0x06 OP2rn LDrn,
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@ -137,7 +140,7 @@
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0xcb A,
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C@ ( b r op )
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ROT ( r op b )
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8 * ( r op b<<3 )
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<<3 ( r op b<<3 )
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OR OR A,
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;
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0xc0 OP2br SETbr,
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@ -167,7 +170,7 @@
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DOES>
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@ SPLITB SWAP ( r lsb msb )
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A, ( r lsb )
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SWAP 8 * ( lsb r<<3 )
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SWAP <<3 ( lsb r<<3 )
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OR A,
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;
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0xed41 OP2r OUT(C)r,
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@ -179,7 +182,7 @@
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DOES>
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0xed A,
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C@ SWAP ( op ss )
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16 * ( op ss<< 4 )
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<<4 ( op ss<< 4 )
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OR A,
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;
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0x4a OP2ss ADCHLss,
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@ -191,7 +194,7 @@
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DOES>
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C@ ( dd nn op )
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ROT ( nn op dd )
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16 * ( nn op dd<<4 )
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<<4 ( nn op dd<<4 )
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OR A,
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SPLITB A, A,
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;
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@ -222,6 +225,21 @@
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0x10 OPJR DJNZe,
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( Specials )
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( dd nn -- )
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: LDdd(nn),
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0xed A,
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SWAP <<4 0x4b OR A,
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SPLITB A, A,
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;
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( nn dd -- )
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: LD(nn)dd,
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0xed A,
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<<4 0x43 OR A,
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SPLITB A, A,
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;
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( JTBL+18 == next )
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: JPNEXT, [ JTBL 18 + LITN ] JPnn, ;
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@ -245,3 +245,8 @@ CODE IMMED?
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( notset )
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DE PUSHqq,
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;CODE
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CODE (resSP)
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( INITIAL_SP == JTBL+28 )
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SP JTBL 28 + @ LDdd(nn),
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;CODE
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