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15 changed files with 76 additions and 51 deletions

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@ -11,5 +11,6 @@ CONSTANT x n -- Creates cell x that when called pushes its
DOES> -- See B17.
IMMED? a -- f Checks whether wordref at a is immediate.
IMMEDIATE -- Flag the latest defined word as immediate.
LITA n -- Write address n as a literal.
LITN n -- Write number n as a literal.
VARIABLE c -- Creates cell x with 2 bytes allocation.

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@ -1,3 +1,4 @@
(cont.)
0x2b: doesWord. This word is created by "DOES>" and is followed
by a 2-byte value as well as the address where "DOES>" was
compiled. At that address is an atom list exactly like in a
@ -5,12 +6,11 @@ compiled word. Upon execution, after having pushed its cell
addr to PSP, it execute its reference exactly like a
compiledWord.
Also note that word routines references in wordrefs are 1b.
This means that all word routine reference must live below
0x100 in boot binary.
0x20: numberWord. No word is actually compiled with this
routine, but atoms are. Atoms with a reference to the number
words routine are followed, *in the atom list*, of a 2-byte
number. Upon execution, that number is fetched and IP is
avdanced by an extra 2 bytes.
0x24: addrWord. Exactly like a numberWord, except that it is
treated differently by meta-tools. (cont.)

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@ -0,0 +1,16 @@
(cont.)
0x22: litWord. Similar to a number word, except that instead of
being followed by a 2 byte number, it is followed by a
null-terminated string. Upon execution, the address of that
null-terminated string is pushed on the PSP and IP is advanced
to the address following the null.
Also note that word routines references in wordrefs are 1b.
This means that all word routine reference must live below
0x100 in boot binary. This is why numberWord and addrWord are
squeezed where they are.

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@ -5,7 +5,7 @@
: JPNEXT, 26 BJP, ; ( 26 == next )
: chkPS, L4 @ CALLnn, ; ( chkPS, B305 )
: chkPS, L4 @ BCALL, ; ( chkPS, B305 )
: CODE ( same as CREATE, but with native word )
(entry)

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@ -8,9 +8,9 @@ VARIABLE XCURRENT
: _xapply ( a -- a-off )
DUP ORG @ > IF ORG @ - BIN( @ + THEN ;
: X' XCON ' XCOFF ;
: X['] XCON ' _xapply LITN XCOFF ;
: X['] XCON ' _xapply LITA XCOFF ;
: XCOMPILE
XCON ' _xapply LITN
XCON ' _xapply LITA
LIT< , FIND DROP _xapply , XCOFF ;
: X[COMPILE] XCON ' _xapply , XCOFF ;

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@ -7,8 +7,8 @@ NOP, ( 0a, unused )
0 JPnn, ( 14, popRS )
EXDEHL, JP(HL), NOP, ( 17, nativeWord )
0 JPnn, ( 1a, next ) 0 JPnn, ( unused )
NOP, NOP, NOP, NOP, ( 20, unused )
NOP, NOP, NOP, NOP, ( 24, unused )
NOP, NOP, ( 20, numberWord ) NOP, NOP, ( 22, litWord )
NOP, NOP, ( 24, addrWord ) NOP, NOP, ( 26, unused )
0 JPnn, ( RST 28 )
0 JPnn, ( 2b, doesWord ) NOP, NOP, ( 2e, unused )
0 JPnn, ( RST 30 )

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@ -1,14 +1,16 @@
CODE 2>R ( 0xa9 )
DE POPqq, HL POPqq,
17 BCALL, ( 17 == pushRS ) EXDEHL, 17 BCALL,
;CODE NOP, NOP, NOP,
CODE (n) ( 0xbf, number literal )
( Literal value to push to stack is next to (n) reference
in the atom list. That is where IP is currently pointing.
Read, push, then advance IP. )
E 0 IY+ LDrIXY,
D 1 IY+ LDrIXY,
IY INCss,
IY INCss,
DE PUSHqq,
;CODE ( END OF STABLE ABI )
CODE >R
HL POPqq,
17 BCALL, ( 17 == pushRS )
;CODE
CODE R>
20 BCALL, ( 20 == popRS )
HL PUSHqq,
;CODE
CODE 2R>
20 BCALL, ( 20 == popRS ) EXDEHL, 20 BCALL,
HL PUSHqq, DE PUSHqq,
;CODE

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@ -1,11 +1,16 @@
CODE (s) ( 0xd4, string literal )
( Like (n) but instead of being followed by a 2 bytes
number, it's followed by a string. When called, puts the
string's address on PS )
IY PUSHqq, HL POPqq, ( <-- IP )
E (HL) LDrr, D 0 LDrn,
DE INCss,
DE ADDIYss,
HL PUSHqq,
;CODE
( END OF STABLE ABI )
( See B85 for word routine impl notes )
PC ORG @ 0x20 + ! ( numberWord )
PC ORG @ 0x24 + ! ( addrWord )
( This is not a word, but a number literal. This works a bit
differently than others: PF means nothing and the actual
number is placed next to the numberWord reference in the
compiled word list. What we need to do to fetch that number
is to play with the IP. )
E 0 IY+ LDrIXY,
D 1 IY+ LDrIXY,
IY INCss,
IY INCss,
DE PUSHqq,
JPNEXT,

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@ -1,15 +1,15 @@
CODE >R
HL POPqq,
17 BCALL, ( 17 == pushRS )
;CODE
CODE R>
20 BCALL, ( 20 == popRS )
PC ORG @ 0x22 + ! ( litWord, 0xf7, tight on the 0x100 limit )
( Like numberWord, but instead of being followed by a 2 bytes
number, it's followed by a null-terminated string. When
called, puts the string's address on PS )
IY PUSHqq, HL POPqq, ( <-- IP )
E (HL) LDrr, D 0 LDrn,
DE INCss,
DE ADDIYss,
HL PUSHqq,
;CODE
CODE 2R>
20 BCALL, ( 20 == popRS ) EXDEHL, 20 BCALL,
HL PUSHqq, DE PUSHqq,
;CODE
JPNEXT,

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@ -3,7 +3,7 @@ PC ORG @ 0x0f + ! ( compiledWord )
2. Set new IP to the second atom of the list
3. Execute the first atom of the list. )
IY PUSHqq, HL POPqq, ( <-- IP )
L4 @ ( pushRS ) CALLnn,
L4 @ ( pushRS ) BCALL,
EXDEHL, ( HL points to PFA )
( While we inc, dereference into DE for execute call later. )
LDDE(HL),

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@ -3,7 +3,7 @@
C< DUP 34 ( ASCII " ) = IF DROP EXIT THEN C,
AGAIN ;
: LIT"
COMPILE (s) H@ 0 C, ,"
34 , ( litWord ) H@ 0 C, ,"
DUP H@ -^ 1- ( a len ) SWAP C!
; IMMEDIATE
: ." [COMPILE] LIT" COMPILE (print) ; IMMEDIATE

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@ -3,7 +3,7 @@
: DO COMPILE 2>R H@ ; IMMEDIATE
: LOOP COMPILE (loop) H@ - _bchk , ; IMMEDIATE
( LEAVE is implemented in low xcomp )
: LITN COMPILE (n) , ;
: LITN 32 , , ( 32 == NUMBER ) ;
( gets its name at the very end. can't comment afterwards )
: _ BEGIN LIT< ) WORD S= UNTIL ; IMMEDIATE
: _ ( : will get its name almost at the very end )

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@ -1,10 +1,11 @@
: LIT< COMPILE (s) WORD DUP C@ 1+ MOVE, ; IMMEDIATE
: LIT< WORD 34 , DUP C@ 1+ MOVE, ; IMMEDIATE
: BEGIN H@ ; IMMEDIATE
: AGAIN COMPILE (br) H@ - _bchk , ; IMMEDIATE
: UNTIL COMPILE (?br) H@ - _bchk , ; IMMEDIATE
: [ INTERPRET ; IMMEDIATE
: ] R> DROP ;
: COMPILE ' LITN ['] , , ; IMMEDIATE
: LITA 36 , , ;
: COMPILE ' LITA ['] , , ; IMMEDIATE
: [COMPILE] ' , ; IMMEDIATE

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@ -5,7 +5,7 @@
['] EXIT ,
R> DROP ( exit : )
; IMMEDIATE
: ['] ' LITN ; IMMEDIATE
: ['] ' LITA ; IMMEDIATE
';' X' _ 4 - C! ( give ; its name )
':' X' _ 4 - C! ( give : its name )
'(' X' _ 4 - C!

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