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Bring EXECUTE word outside of stable ABI

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This commit is contained in:
Virgil Dupras 2020-04-15 13:31:51 -04:00
parent 22f132094a
commit 728e4ce123
3 changed files with 21 additions and 23 deletions
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BIN
emul/forth/z80c.bin
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41
forth/boot.fs
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@ -31,13 +31,13 @@ RAMSTART 0x4e + JPnn, ( 28, RST 28 )
0 JPnn, ( 2b, doesWord )
NOP, NOP, ( 2e, unused )
RAMSTART 0x4e + JPnn, ( RST 30 )
NOP, NOP, NOP, ( unused )
0 JPnn, ( 33, execute )
NOP, NOP, ( unused )
RAMSTART 0x4e + JPnn, ( RST 38 )
NOP, ( unused )
( BOOT DICT
There are only 5 words in the boot dict, but these words'
There are only 3 words in the boot dict, but these words'
offset need to be stable, so they're part of the "stable
ABI"
)
@ -70,7 +70,7 @@ L2 BSET ( used in CBR )
'(' A, '?' A, 'b' A, 'r' A, ')' A,
PC L1 @ - A,, ( prev )
5 A,
L1 BSET ( CBR )
H@ XCURRENT ! ( set current tip of dict )
0x17 A,, ( nativeWord )
HL POPqq,
chkPS,
@ -84,22 +84,6 @@ L1 BSET ( CBR )
RAMSTART 0x06 + LD(nn)HL, ( RAMSTART+0x06 == IP )
JPNEXT,
'E' A, 'X' A, 'E' A, 'C' A, 'U' A, 'T' A, 'E' A,
PC L1 @ - A,, ( prev )
7 A,
H@ XCURRENT ! ( set current tip of dict )
L2 BSET ( used frequently below )
0x17 A,, ( nativeWord )
IY POPqq, ( is a wordref )
chkPS,
L 0 IY+ LDrIXY,
H 1 IY+ LDrIXY,
( HL points to code pointer )
IY INCss,
IY INCss,
( IY points to PFA )
JP(HL),
( END OF STABLE ABI )
( Name of BOOT word )
@ -130,7 +114,7 @@ PC ORG @ 1 + ! ( main )
HL L1 @ LDddnn,
0x03 CALLnn, ( 03 == find )
DE PUSHqq,
L2 @ 2 + JPnn,
0x33 JPnn, ( 33 == execute )
PC ORG @ 4 + ! ( find )
( Find the entry corresponding to word name where (HL) points
@ -238,7 +222,7 @@ L1 BSET ( abortUnderflow )
DE RAMSTART 0x02 + LDdd(nn), ( RAM+02 == CURRENT )
0x03 CALLnn, ( find )
DE PUSHqq,
L2 @ 2 + JPnn, ( EXECUTE, skip nativeWord )
0x33 JPnn, ( 33 == execute )
PC ORG @ 0x1e + ! ( chkPS )
@ -282,7 +266,18 @@ PC ORG @ 0x1b + ! ( next )
HL INCss,
D (HL) LDrr,
DE PUSHqq,
L2 @ 2 + JPnn, ( EXECUTE, skip nativeWord )
( continue to execute )
PC ORG @ 0x34 + ! ( execute )
IY POPqq, ( is a wordref )
chkPS,
L 0 IY+ LDrIXY,
H 1 IY+ LDrIXY,
( HL points to code pointer )
IY INCss,
IY INCss,
( IY points to PFA )
JP(HL),
( WORD ROUTINES )
@ -302,7 +297,7 @@ PC ORG @ 0x0f + ! ( compiledWord )
L 0 IY+ LDrIXY,
H 1 IY+ LDrIXY,
HL PUSHqq, ( arg for EXECUTE )
L2 @ 2 + JPnn, ( EXECUTE, skip nativeWord )
0x33 JPnn, ( 33 == execute )
PC ORG @ 0x0c + ! ( cellWord )
( Pushes the PFA directly )

3
forth/z80c.fs
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@ -14,6 +14,9 @@
This unit expects the same conf as boot.fs.
)
CODE EXECUTE
0x33 JPnn, ( 33 == execute )
( a b c -- b c a )
CODE ROT
HL POPqq, ( C )