wip
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53c9580944
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00401077f0
2
blk/288
2
blk/288
@ -6,5 +6,5 @@ PC ORG @ 0x22 + ! ( litWord, 0xf7, tight on the 0x100 limit )
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E (HL) LDrr, D 0 LDrn,
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DE INCss, DE INCss,
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DE ADDIYss,
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HL INCss, HL PUSHqq,
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HL PUSHqq,
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JPNEXT,
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2
blk/289
2
blk/289
@ -1,5 +1,5 @@
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( Name of BOOT word )
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4 A, L1 BSET 'B' A, 'O' A, 'O' A, 'T' A,
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L1 BSET 4 A, 'B' A, 'O' A, 'O' A, 'T' A,
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PC ORG @ 1 + ! ( main )
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( STACK OVERFLOW PROTECTION: See B76 )
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2
blk/291
2
blk/291
@ -5,7 +5,7 @@ PC ORG @ 4 + ! ( find )
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BC PUSHqq,
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HL PUSHqq,
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( First, figure out string len )
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HL DECss, A (HL) LDrr, A ORr,
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A (HL) LDrr, A ORr,
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( special case. zero len? we never find anything. )
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IFNZ, ( fail-B296 )
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( Let's do something weird: We'll hold HL by the *tail*.
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2
blk/298
2
blk/298
@ -1,6 +1,6 @@
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6 A, '(' A, 'u' A, 'f' A, 'l' A, 'w' A, ')' A,
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L2 BSET ( abortUnderflow )
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HL PC 6 - LDddnn,
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HL PC 7 - LDddnn,
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DE RAMSTART 0x02 + LDdd(nn), ( RAM+02 == CURRENT )
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0x03 BCALL, ( find )
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0x33 BJP, ( 33 == execute )
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1
blk/328
1
blk/328
@ -1,6 +1,5 @@
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CODE S=
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DE POPqq, HL POPqq, chkPS,
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HL DECss, DE DECss,
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LDA(DE),
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(HL) CPr,
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IFZ, ( same size? )
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6
blk/357
6
blk/357
@ -1,4 +1,4 @@
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: _ ( a len -- n f )
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: _ ( a+1 len -- n f )
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OVER C@ ( a len c )
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'-' = IF
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1- SWAP 1+ SWAP ( a+1 len-1 ) _ 0 ROT ( f 0 n )
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@ -6,6 +6,6 @@
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THEN ( a len )
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0 SWAP ( len ) 0 DO ( a r )
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OVER I + C@ ( a r c ) _pdacc ( a r f )
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IF DROP 0 UNLOOP EXIT THEN LOOP ( a r )
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IF DROP 1- 0 UNLOOP EXIT THEN LOOP ( a r )
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NIP 1 ;
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: (parsed) ( a -- n f ) DUP 1- C@ ( a l ) _ ;
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: (parsed) ( a -- n f ) C@+ ( a+1 l ) _ ;
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4
blk/358
4
blk/358
@ -3,9 +3,9 @@
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: (parsec) ( a -- n f )
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( apostrophe is ASCII 39 )
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DUP C@ 39 = OVER 2+ C@ 39 = AND ( a f )
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DUP 1+ C@ 39 = OVER 3 + C@ 39 = AND ( a f )
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NOT IF 0 EXIT THEN ( a 0 )
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( surrounded by apos, good, return )
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1+ C@ 1 ( n 1 )
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2+ C@ 1 ( n 1 )
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;
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8
blk/360
8
blk/360
@ -1,9 +1,9 @@
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: (parseh) ( a -- n f )
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( '0': ASCII 0x30 'x': 0x78 0x7830: 30768 )
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DUP @ 30768 = NOT IF 0 EXIT THEN ( a 0 )
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( '0': ASCII 0x30 'x': 0x78 0x7830 )
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DUP 1+ @ 0x7830 = NOT IF 0 EXIT THEN ( a 0 )
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( We have "0x" prefix )
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DUP 1- C@ ( a len )
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0 SWAP ( len ) 2 DO ( a r )
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DUP C@ ( a len )
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0 SWAP 1+ ( len+1 ) 3 DO ( a r )
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OVER I + C@ ( a r c ) _ ( a r n )
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DUP 0< IF 2DROP 0 UNLOOP EXIT THEN
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SWAP 4 LSHIFT + ( a r*16+n ) LOOP
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8
blk/362
8
blk/362
@ -1,9 +1,9 @@
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: (parseb) ( a -- n f )
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( '0': ASCII 0x30 'b': 0x62 0x6230: 25136 )
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DUP @ 25136 = NOT IF 0 EXIT THEN ( a 0 )
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( '0': ASCII 0x30 'b': 0x62 0x6230 )
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DUP 1+ @ 0x6230 = NOT IF 0 EXIT THEN ( a 0 )
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( We have "0b" prefix )
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DUP 1- C@ ( a len )
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0 SWAP ( len ) 2 DO ( a r )
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DUP C@ ( a len )
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0 SWAP 1+ ( len+1 ) 3 DO ( a r )
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OVER I + C@ ( a r c ) _ ( a r n )
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DUP 0< IF 2DROP 0 UNLOOP EXIT THEN
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SWAP 1 LSHIFT + ( a r*2+n ) LOOP
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10
blk/366
10
blk/366
@ -1,15 +1,13 @@
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( Read word from C<, copy to WORDBUF, null-terminate, and
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return WORDBUF. )
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: _wb 0x0e RAM+ ;
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: _eot 4 _wb ! _wb ;
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: _eot 0x0401 _wb ! _wb ;
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: WORD
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_wb 1+ TOWORD ( a c )
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DUP EOT? IF 2DROP _eot EXIT THEN
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BEGIN
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( We take advantage of the fact that char MSB is
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always zero to pre-write our null-termination )
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OVER ! 1+ C< ( a c )
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OVER 0x2d ( 2e-1 for NULL ) RAM+ = OVER WS? OR
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OVER C! 1+ C< ( a c )
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OVER 0x2e RAM+ = OVER WS? OR
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UNTIL ( a c )
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SWAP _wb - 1- ( ws len ) _wb C!
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EOT? IF _eot ELSE _wb 1+ THEN ;
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EOT? IF _eot ELSE _wb THEN ;
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2
blk/371
2
blk/371
@ -1,5 +1,5 @@
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: [entry] ( w -- )
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1- C@+ ( w+1 len ) TUCK MOVE, ( len )
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C@+ ( w+1 len ) TUCK MOVE, ( len )
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( write prev value )
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H@ CURRENT @ - ,
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C, ( write size )
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2
blk/381
2
blk/381
@ -1,7 +1,7 @@
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: EMIT
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( 0x53==(emit) override )
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0x53 RAM+ @ ?DUP IF EXECUTE ELSE (emit) THEN ;
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: (print) 1- C@+ ( a len ) 0 DO C@+ EMIT LOOP DROP ;
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: (print) C@+ ( a len ) 0 DO C@+ EMIT LOOP DROP ;
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: BS 8 EMIT ; : LF 10 EMIT ; : CR 13 EMIT ;
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: CRLF CR LF ; : SPC 32 EMIT ;
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: NL 0x0a RAM+ @ ( NLPTR ) ?DUP IF EXECUTE ELSE CRLF THEN ;
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2
blk/392
2
blk/392
@ -1,6 +1,6 @@
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: INTERPRET
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BEGIN
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WORD DUP C@ EOT? IF DROP EXIT THEN
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WORD DUP @ 0x0401 = ( EOT ) IF DROP EXIT THEN
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FIND NOT IF (parse) ELSE EXECUTE THEN
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C<? NOT IF SPC LIT< ok (print) NL THEN
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AGAIN ;
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2
blk/399
2
blk/399
@ -1,4 +1,4 @@
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: LIT< WORD 34 , 1- DUP C@ 1+ MOVE, 0 C, ; IMMEDIATE
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: LIT< WORD 34 , DUP C@ 1+ MOVE, 0 C, ; IMMEDIATE
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: BEGIN H@ ; IMMEDIATE
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: AGAIN COMPILE (br) H@ - _bchk , ; IMMEDIATE
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: UNTIL COMPILE (?br) H@ - _bchk , ; IMMEDIATE
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BIN
emul/forth.bin
BIN
emul/forth.bin
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