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Make word routines all in the <0x100 range

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This commit is contained in:
Virgil Dupras 2020-04-15 14:00:59 -04:00
parent 728e4ce123
commit e40c059c26
2 changed files with 41 additions and 41 deletions
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@ -86,6 +86,46 @@ H@ XCURRENT ! ( set current tip of dict )
( END OF STABLE ABI )
( We want numberWord and litWord routine to be below the 0x100
offset so that we can reduce the size of the routine field
in words to 1 byte. )
( addrWord is the exact same thing as a numberWord except that
it is treated differently by meta-tools. See notes.txt )
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.
)
RAMSTART 0x06 + LDHL(nn), ( RAMSTART+0x06 == IP )
E (HL) LDrr,
HL INCss,
D (HL) LDrr,
HL INCss,
RAMSTART 0x06 + LD(nn)HL, ( RAMSTART+0x06 == IP )
DE PUSHqq,
JPNEXT,
PC ORG @ 0x22 + ! ( litWord )
( Similarly to numberWord, this is not a real word, but a
string literal. 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 )
RAMSTART 0x06 + LDHL(nn), ( RAMSTART+0x06 == IP )
HL PUSHqq,
( skip to null char )
A XORr, ( look for null )
B A LDrr,
C A LDrr,
CPIR,
( CPIR advances HL regardless of comparison, so goes one
char after NULL. This is good, because that's what we
want... )
RAMSTART 0x06 + LD(nn)HL, ( RAMSTART+0x06 == IP )
JPNEXT,
( Name of BOOT word )
L1 BSET
'B' A, 'O' A, 'O' A, 'T' A, 0 A,
@ -272,15 +312,13 @@ PC ORG @ 0x34 + ! ( execute )
IY POPqq, ( is a wordref )
chkPS,
L 0 IY+ LDrIXY,
H 1 IY+ LDrIXY,
H 0 LDrn,
( HL points to code pointer )
IY INCss,
IY INCss,
( IY points to PFA )
JP(HL),
( WORD ROUTINES )
PC ORG @ 0x0f + ! ( compiledWord )
( Execute a list of atoms, which always end with EXIT.
IY points to that list. What do we do:
@ -317,41 +355,3 @@ PC ORG @ 0x2c + ! ( doesWord )
H 3 IY+ LDrIXY,
HL PUSHqq, IY POPqq,
0x0e JPnn, ( 0e == compiledWord )
( addrWord is the exact same thing as a numberWord except that
it is treated differently by meta-tools. See notes.txt )
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.
)
RAMSTART 0x06 + LDHL(nn), ( RAMSTART+0x06 == IP )
E (HL) LDrr,
HL INCss,
D (HL) LDrr,
HL INCss,
RAMSTART 0x06 + LD(nn)HL, ( RAMSTART+0x06 == IP )
DE PUSHqq,
JPNEXT,
PC ORG @ 0x22 + ! ( litWord )
( Similarly to numberWord, this is not a real word, but a
string literal. 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 )
RAMSTART 0x06 + LDHL(nn), ( RAMSTART+0x06 == IP )
HL PUSHqq,
( skip to null char )
A XORr, ( look for null )
B A LDrr,
C A LDrr,
CPIR,
( CPIR advances HL regardless of comparison, so goes one
char after NULL. This is good, because that's what we
want... )
RAMSTART 0x06 + LD(nn)HL, ( RAMSTART+0x06 == IP )
JPNEXT,