mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-02 08:20:57 +11:00
Compare commits
3 Commits
7464c67c80
...
fcd77f80ab
Author | SHA1 | Date | |
---|---|---|---|
|
fcd77f80ab | ||
|
503dbe9a2c | ||
|
338769a0a8 |
3
blk/001
3
blk/001
@ -3,8 +3,7 @@ MASTER INDEX
|
|||||||
3 Usage 30 Dictionary
|
3 Usage 30 Dictionary
|
||||||
70 Implementation notes 100 Block editor
|
70 Implementation notes 100 Block editor
|
||||||
200 Z80 assembler 260 Cross compilation
|
200 Z80 assembler 260 Cross compilation
|
||||||
|
280 Z80 boot code
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
10
blk/064
10
blk/064
@ -1,10 +1,10 @@
|
|||||||
Disk
|
Disk
|
||||||
|
|
||||||
BLK> -- a Address of the current block variable.
|
BLK> -- a Address of the current block variable.
|
||||||
LIST n -- Prints the contents of the block n on screen in the
|
LIST n -- Prints the contents of the block n on screen
|
||||||
form of 16 lines of 64 columns.
|
in the form of 16 lines of 64 columns.
|
||||||
LOAD n -- Interprets Forth code from block n
|
LOAD n -- Interprets Forth code from block n
|
||||||
|
LOADR n1 n2 -- Load block range between n1 and n2, inclusive.
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
2
blk/075
2
blk/075
@ -13,4 +13,4 @@ This return stack contain "Interpreter pointers", that is a
|
|||||||
pointer to the address of a word, as seen in a compiled list of
|
pointer to the address of a word, as seen in a compiled list of
|
||||||
words.
|
words.
|
||||||
|
|
||||||
|
(cont.)
|
||||||
|
6
blk/076
Normal file
6
blk/076
Normal file
@ -0,0 +1,6 @@
|
|||||||
|
STACK OVERFLOW PROTECTION: To avoid having to check for stack
|
||||||
|
underflow after each pop operation (which can end up being
|
||||||
|
prohibitive in terms of costs), we give ourselves a nice 6
|
||||||
|
bytes buffer. 6 bytes because we seldom have words requiring
|
||||||
|
more than 3 items from the stack. Then, at each "exit" call we
|
||||||
|
check for stack underflow.
|
8
blk/087
8
blk/087
@ -5,10 +5,10 @@ null-terminated string. Upon execution, the address of that
|
|||||||
null-terminated string is pushed on the PSP and IP is advanced
|
null-terminated string is pushed on the PSP and IP is advanced
|
||||||
to the address following the null.
|
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.
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
4
blk/102
4
blk/102
@ -1,10 +1,10 @@
|
|||||||
103 LOAD 104 LOAD 105 LOAD
|
103 105 LOADR
|
||||||
|
|
||||||
: BROWSE
|
: BROWSE
|
||||||
100 _LIST
|
100 _LIST
|
||||||
BEGIN
|
BEGIN
|
||||||
KEY CASE
|
KEY CASE
|
||||||
'Q' OF DROP EXIT ENDOF
|
'Q' OF EXIT ENDOF
|
||||||
'B' OF B ENDOF
|
'B' OF B ENDOF
|
||||||
'N' OF N ENDOF
|
'N' OF N ENDOF
|
||||||
_NUM
|
_NUM
|
||||||
|
2
blk/200
2
blk/200
@ -10,4 +10,4 @@ Z80 Assembler
|
|||||||
234 OP2r 236 OP2ss
|
234 OP2r 236 OP2ss
|
||||||
238 OP3ddnn 240 OP3nn
|
238 OP3ddnn 240 OP3nn
|
||||||
242 Specials 246 Flow
|
242 Specials 246 Flow
|
||||||
|
249 Macros
|
||||||
|
2
blk/212
2
blk/212
@ -5,4 +5,4 @@ H@ 0x59 RAM+ !
|
|||||||
213 LOAD 215 LOAD 216 LOAD 217 LOAD 218 LOAD 219 LOAD
|
213 LOAD 215 LOAD 216 LOAD 217 LOAD 218 LOAD 219 LOAD
|
||||||
220 LOAD 222 LOAD 223 LOAD 224 LOAD 226 LOAD 228 LOAD
|
220 LOAD 222 LOAD 223 LOAD 224 LOAD 226 LOAD 228 LOAD
|
||||||
230 LOAD 232 LOAD 234 LOAD 236 LOAD 238 LOAD 240 LOAD
|
230 LOAD 232 LOAD 234 LOAD 236 LOAD 238 LOAD 240 LOAD
|
||||||
242 LOAD 243 LOAD 244 LOAD 246 LOAD 247 LOAD
|
242 LOAD 243 LOAD 246 LOAD 247 LOAD 249 LOAD
|
||||||
|
6
blk/249
Normal file
6
blk/249
Normal file
@ -0,0 +1,6 @@
|
|||||||
|
( Macros )
|
||||||
|
( clear carry + SBC )
|
||||||
|
: SUBHLss, A ORr, SBCHLss, ;
|
||||||
|
: PUSH0, BC 0 LDddnn, BC PUSHqq, ;
|
||||||
|
: PUSH1, BC 1 LDddnn, BC PUSHqq, ;
|
||||||
|
: PUSHZ, BC 0 LDddnn, IFZ, BC INCss, THEN, BC PUSHqq, ;
|
16
blk/280
Normal file
16
blk/280
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
Z80 boot code
|
||||||
|
|
||||||
|
This assembles the boot binary. It requires the Z80 assembler
|
||||||
|
(B200) and cross compilation setup (B260).
|
||||||
|
|
||||||
|
On top of that, it requires RAMSTART to be defined as the
|
||||||
|
beginning address of RAM. This is where system variables are
|
||||||
|
placed. HERE is then placed at RAM+80 (ref B80).
|
||||||
|
|
||||||
|
We also need RS_ADDR to be set to the bottom address of the
|
||||||
|
Return Stack.
|
||||||
|
|
||||||
|
RESERVED REGISTERS: At all times, IX points to RSP TOS and IY
|
||||||
|
is IP. SP points to PSP TOS, but you can still use the stack\
|
||||||
|
in native code. you just have to make sure you've restored it
|
||||||
|
before "next". (cont.)
|
7
blk/281
Normal file
7
blk/281
Normal file
@ -0,0 +1,7 @@
|
|||||||
|
(cont.) STABLE ABI: The boot binary starts with a list of
|
||||||
|
references. The address of these references have to stay to
|
||||||
|
those addresses. The rest of the Collapse OS code depend on it.
|
||||||
|
In fact, up until 0x67, the (?br) wordref, pretty much
|
||||||
|
everything has to stay put.
|
||||||
|
|
||||||
|
To assemble, run "282 LOAD".
|
15
blk/283
Normal file
15
blk/283
Normal file
@ -0,0 +1,15 @@
|
|||||||
|
H@ ORG !
|
||||||
|
0 JPnn, ( 00, main ) 0 JPnn, ( 03, find )
|
||||||
|
NOP, NOP, ( 06, unused ) NOP, NOP, ( 08, LATEST )
|
||||||
|
NOP, ( 0a, unused ) 0 JPnn, ( 0b, cellWord )
|
||||||
|
0 JPnn, ( 0e, compiledWord ) 0 JPnn, ( 11, pushRS )
|
||||||
|
0 JPnn, ( 14, popRS )
|
||||||
|
EXDEHL, JP(HL), NOP, ( 17, nativeWord )
|
||||||
|
0 JPnn, ( 1a, next ) 0 JPnn, ( 1d, chkPS )
|
||||||
|
NOP, NOP, ( 20, numberWord ) NOP, NOP, ( 22, litWord )
|
||||||
|
NOP, NOP, ( 24, addrWord ) NOP, NOP, ( 26, unused )
|
||||||
|
RAMSTART 0x4e + JPnn, ( 28, RST 28 )
|
||||||
|
0 JPnn, ( 2b, doesWord ) NOP, NOP, ( 2e, unused )
|
||||||
|
RAMSTART 0x4e + JPnn, ( RST 30 )
|
||||||
|
0 JPnn, ( 33, execute ) NOP, NOP, ( unused )
|
||||||
|
RAMSTART 0x4e + JPnn, ( RST 38 )
|
12
blk/284
Normal file
12
blk/284
Normal file
@ -0,0 +1,12 @@
|
|||||||
|
( BOOT DICT: 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" )
|
||||||
|
'E' A, 'X' A, 'I' A, 'T' A,
|
||||||
|
0 A,, ( prev )
|
||||||
|
4 A,
|
||||||
|
H@ XCURRENT ! ( set current tip of dict, 0x42 )
|
||||||
|
0x17 A, ( nativeWord )
|
||||||
|
0x14 CALLnn, ( popRS )
|
||||||
|
HL PUSHqq, IY POPqq, ( --> IP )
|
||||||
|
JPNEXT,
|
||||||
|
|
6
blk/285
Normal file
6
blk/285
Normal file
@ -0,0 +1,6 @@
|
|||||||
|
CODE (br) ( 0x53 )
|
||||||
|
L2 BSET ( used in CBR )
|
||||||
|
E 0 IY+ LDrIXY,
|
||||||
|
D 1 IY+ LDrIXY,
|
||||||
|
DE ADDIYss,
|
||||||
|
JPNEXT,
|
13
blk/286
Normal file
13
blk/286
Normal file
@ -0,0 +1,13 @@
|
|||||||
|
CODE (?br) ( 0x67 )
|
||||||
|
HL POPqq,
|
||||||
|
chkPS,
|
||||||
|
A H LDrr,
|
||||||
|
L ORr,
|
||||||
|
JRZ, L2 BWR ( BR + 2. False, branch )
|
||||||
|
( True, skip next 2 bytes and don't branch )
|
||||||
|
IY INCss,
|
||||||
|
IY INCss,
|
||||||
|
JPNEXT,
|
||||||
|
|
||||||
|
( END OF STABLE ABI )
|
||||||
|
|
14
blk/287
Normal file
14
blk/287
Normal file
@ -0,0 +1,14 @@
|
|||||||
|
( 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,
|
16
blk/288
Normal file
16
blk/288
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
PC ORG @ 0x22 + ! ( litWord )
|
||||||
|
( 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 )
|
||||||
|
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... )
|
||||||
|
HL PUSHqq, IY POPqq, ( --> IP )
|
||||||
|
JPNEXT,
|
16
blk/289
Normal file
16
blk/289
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
( Name of BOOT word )
|
||||||
|
L1 BSET 'B' A, 'O' A, 'O' A, 'T' A, 0 A,
|
||||||
|
|
||||||
|
PC ORG @ 1 + ! ( main )
|
||||||
|
( STACK OVERFLOW PROTECTION: See B76 )
|
||||||
|
SP 0xfffa LDddnn,
|
||||||
|
RAMSTART SP LD(nn)dd, ( RAM+00 == INITIAL_SP )
|
||||||
|
IX RS_ADDR LDddnn,
|
||||||
|
( HERE begins at RAMEND )
|
||||||
|
HL RAMSTART 0x80 + LDddnn,
|
||||||
|
RAMSTART 0x04 + LD(nn)HL, ( RAM+04 == HERE )
|
||||||
|
( LATEST is a label to the latest entry of the dict. It is
|
||||||
|
written at offset 0x08 by the process or person building
|
||||||
|
Forth. )
|
||||||
|
0x08 LDHL(nn),
|
||||||
|
RAMSTART 0x02 + LD(nn)HL, ( RAM+02 == CURRENT cont. )
|
4
blk/290
Normal file
4
blk/290
Normal file
@ -0,0 +1,4 @@
|
|||||||
|
EXDEHL,
|
||||||
|
HL L1 @ LDddnn,
|
||||||
|
0x03 CALLnn, ( 03 == find )
|
||||||
|
0x33 JPnn, ( 33 == execute )
|
16
blk/291
Normal file
16
blk/291
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
PC ORG @ 4 + ! ( find )
|
||||||
|
( Find the entry corresponding to word name where (HL) points
|
||||||
|
to in dictionary having its tip at DE and sets DE to point
|
||||||
|
to that entry. Z if found, NZ if not. )
|
||||||
|
BC PUSHqq,
|
||||||
|
HL PUSHqq,
|
||||||
|
( First, figure out string len )
|
||||||
|
BC 0 LDddnn,
|
||||||
|
A XORr,
|
||||||
|
CPIR,
|
||||||
|
( C has our length, negative, -1 )
|
||||||
|
A C LDrr,
|
||||||
|
NEG,
|
||||||
|
A DECr,
|
||||||
|
( special case. zero len? we never find anything. )
|
||||||
|
JRZ, L1 FWR ( fail-B296 ) ( cont. )
|
16
blk/292
Normal file
16
blk/292
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
C A LDrr, ( C holds our length )
|
||||||
|
( Let's do something weird: We'll hold HL by the *tail*.
|
||||||
|
Because of our dict structure and because we know our
|
||||||
|
lengths, it's easier to compare starting from the end.
|
||||||
|
Currently, after CPIR, HL points to char after null. Let's
|
||||||
|
adjust. Because the compare loop pre-decrements, instead
|
||||||
|
of DECing HL twice, we DEC it once. )
|
||||||
|
HL DECss,
|
||||||
|
BEGIN, ( inner )
|
||||||
|
( DE is a wordref, first step, do our len correspond? )
|
||||||
|
HL PUSHqq, ( --> lvl 1 )
|
||||||
|
DE PUSHqq, ( --> lvl 2 )
|
||||||
|
DE DECss,
|
||||||
|
LDA(DE),
|
||||||
|
0x7f ANDn, ( remove IMMEDIATE flag )
|
||||||
|
C CPr, ( cont. )
|
16
blk/293
Normal file
16
blk/293
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
JRNZ, L2 FWR ( loopend )
|
||||||
|
( match, let's compare the string then )
|
||||||
|
DE DECss, ( Skip prev field. One less because we )
|
||||||
|
DE DECss, ( pre-decrement )
|
||||||
|
B C LDrr, ( loop C times )
|
||||||
|
BEGIN, ( loop )
|
||||||
|
( pre-decrement for easier Z matching )
|
||||||
|
DE DECss,
|
||||||
|
HL DECss,
|
||||||
|
LDA(DE),
|
||||||
|
(HL) CPr,
|
||||||
|
JRNZ, L3 FWR ( loopend )
|
||||||
|
DJNZ, AGAIN, ( loop )
|
||||||
|
L2 FSET L3 FSET ( loopend )
|
||||||
|
|
||||||
|
( cont. )
|
16
blk/294
Normal file
16
blk/294
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
( At this point, Z is set if we have a match. In all cases,
|
||||||
|
we want to pop HL and DE )
|
||||||
|
DE POPqq, ( <-- lvl 2 )
|
||||||
|
HL POPqq, ( <-- lvl 1 )
|
||||||
|
JRZ, L2 FWR ( end-B296, match? we're done! )
|
||||||
|
( no match, go to prev and continue )
|
||||||
|
HL PUSHqq, ( --> lvl 1 )
|
||||||
|
DE DECss,
|
||||||
|
DE DECss,
|
||||||
|
DE DECss, ( prev field )
|
||||||
|
DE PUSHqq, ( --> lvl 2 )
|
||||||
|
EXDEHL,
|
||||||
|
E (HL) LDrr,
|
||||||
|
HL INCss,
|
||||||
|
D (HL) LDrr,
|
||||||
|
( cont. )
|
16
blk/295
Normal file
16
blk/295
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
( DE contains prev offset )
|
||||||
|
HL POPqq, ( <-- lvl 2 )
|
||||||
|
( HL is prev field's addr. Is offset zero? )
|
||||||
|
A D LDrr,
|
||||||
|
E ORr,
|
||||||
|
IFNZ,
|
||||||
|
( get absolute addr from offset )
|
||||||
|
( carry cleared from "or e" )
|
||||||
|
DE SBCHLss,
|
||||||
|
EXDEHL, ( result in DE )
|
||||||
|
THEN,
|
||||||
|
HL POPqq, ( <-- lvl 1 )
|
||||||
|
JRNZ, AGAIN, ( inner-B292, try to match again )
|
||||||
|
( Z set? end of dict, unset Z )
|
||||||
|
|
||||||
|
( cont. )
|
7
blk/296
Normal file
7
blk/296
Normal file
@ -0,0 +1,7 @@
|
|||||||
|
L1 FSET ( fail )
|
||||||
|
A XORr,
|
||||||
|
A INCr,
|
||||||
|
L2 FSET ( end )
|
||||||
|
HL POPqq,
|
||||||
|
BC POPqq,
|
||||||
|
RET,
|
13
blk/297
Normal file
13
blk/297
Normal file
@ -0,0 +1,13 @@
|
|||||||
|
PC ORG @ 0x12 + ! ( pushRS )
|
||||||
|
IX INCss,
|
||||||
|
IX INCss,
|
||||||
|
0 IX+ L LDIXYr,
|
||||||
|
1 IX+ H LDIXYr,
|
||||||
|
RET,
|
||||||
|
|
||||||
|
PC ORG @ 0x15 + ! ( popRS )
|
||||||
|
L 0 IX+ LDrIXY,
|
||||||
|
H 1 IX+ LDrIXY,
|
||||||
|
IX DECss,
|
||||||
|
IX DECss,
|
||||||
|
RET,
|
7
blk/298
Normal file
7
blk/298
Normal file
@ -0,0 +1,7 @@
|
|||||||
|
'(' A, 'u' A, 'f' A, 'l' A, 'w' A, ')' A, 0 A,
|
||||||
|
L2 BSET ( abortUnderflow )
|
||||||
|
HL PC 7 - LDddnn,
|
||||||
|
DE RAMSTART 0x02 + LDdd(nn), ( RAM+02 == CURRENT )
|
||||||
|
0x03 CALLnn, ( find )
|
||||||
|
0x33 JPnn, ( 33 == execute )
|
||||||
|
|
14
blk/299
Normal file
14
blk/299
Normal file
@ -0,0 +1,14 @@
|
|||||||
|
PC ORG @ 0x1e + ! ( chkPS )
|
||||||
|
HL PUSHqq,
|
||||||
|
RAMSTART LDHL(nn), ( RAM+00 == INITIAL_SP )
|
||||||
|
( We have the return address for this very call on the stack
|
||||||
|
and protected registers. Let's compensate )
|
||||||
|
HL DECss,
|
||||||
|
HL DECss,
|
||||||
|
HL DECss,
|
||||||
|
HL DECss,
|
||||||
|
SP SUBHLss,
|
||||||
|
HL POPqq,
|
||||||
|
CNC RETcc, ( INITIAL_SP >= SP? good )
|
||||||
|
JR, L2 BWR ( abortUnderflow-B298 )
|
||||||
|
|
16
blk/300
Normal file
16
blk/300
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
PC ORG @ 0x1b + ! ( next )
|
||||||
|
( This routine is jumped to at the end of every word. In it,
|
||||||
|
we jump to current IP, but we also take care of increasing
|
||||||
|
it by 2 before jumping. )
|
||||||
|
( Before we continue: are stacks within bounds? )
|
||||||
|
0x1d CALLnn, ( chkPS )
|
||||||
|
( check RS )
|
||||||
|
IX PUSHqq, HL POPqq,
|
||||||
|
DE RS_ADDR LDddnn,
|
||||||
|
DE SUBHLss,
|
||||||
|
JRC, L2 BWR ( IX < RS_ADDR? abortUnderflow-B298 )
|
||||||
|
E 0 IY+ LDrIXY,
|
||||||
|
D 1 IY+ LDrIXY,
|
||||||
|
IY INCss,
|
||||||
|
IY INCss,
|
||||||
|
( continue to execute )
|
12
blk/301
Normal file
12
blk/301
Normal file
@ -0,0 +1,12 @@
|
|||||||
|
L3 BSET
|
||||||
|
PC ORG @ 0x34 + ! ( execute )
|
||||||
|
( DE points to wordref )
|
||||||
|
EXDEHL,
|
||||||
|
E (HL) LDrr,
|
||||||
|
D 0 LDrn,
|
||||||
|
EXDEHL,
|
||||||
|
( HL points to code pointer )
|
||||||
|
DE INCss,
|
||||||
|
( DE points to PFA )
|
||||||
|
JP(HL),
|
||||||
|
|
16
blk/302
Normal file
16
blk/302
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
L1 BSET
|
||||||
|
PC ORG @ 0x0f + ! ( compiledWord )
|
||||||
|
( 1. Push current IP to RS
|
||||||
|
2. Set new IP to the second atom of the list
|
||||||
|
3. Execute the first atom of the list. )
|
||||||
|
IY PUSHqq, HL POPqq, ( <-- IP )
|
||||||
|
0x11 CALLnn, ( 11 == pushRS )
|
||||||
|
EXDEHL, ( HL points to PFA )
|
||||||
|
( While we increase, dereference into DE for execute call
|
||||||
|
later. )
|
||||||
|
E (HL) LDrr,
|
||||||
|
HL INCss,
|
||||||
|
D (HL) LDrr,
|
||||||
|
HL INCss,
|
||||||
|
HL PUSHqq, IY POPqq, ( --> IP )
|
||||||
|
JR, L3 BWR ( execute-B301 )
|
5
blk/303
Normal file
5
blk/303
Normal file
@ -0,0 +1,5 @@
|
|||||||
|
PC ORG @ 0x0c + ! ( cellWord )
|
||||||
|
( Pushes PFA directly )
|
||||||
|
DE PUSHqq,
|
||||||
|
JPNEXT,
|
||||||
|
|
16
blk/304
Normal file
16
blk/304
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
PC ORG @ 0x2c + ! ( doesWord )
|
||||||
|
( The word was spawned from a definition word that has a
|
||||||
|
DOES>. PFA+2 (right after the actual cell) is a link to the
|
||||||
|
slot right after that DOES>. Therefore, what we need to do
|
||||||
|
push the cell addr like a regular cell, then follow the
|
||||||
|
linkfrom the PFA, and then continue as a regular
|
||||||
|
compiledWord. )
|
||||||
|
DE PUSHqq, ( like a regular cell )
|
||||||
|
EXDEHL,
|
||||||
|
HL INCss,
|
||||||
|
HL INCss,
|
||||||
|
E (HL) LDrr,
|
||||||
|
HL INCss,
|
||||||
|
D (HL) LDrr,
|
||||||
|
JR, L1 BWR ( compiledWord-B302 )
|
||||||
|
|
9
blk/305
Normal file
9
blk/305
Normal file
@ -0,0 +1,9 @@
|
|||||||
|
( Core words )
|
||||||
|
( KEY and EMIT are not defined here. There're
|
||||||
|
expected to be defined in platform-specific code. )
|
||||||
|
|
||||||
|
|
||||||
|
CODE EXECUTE
|
||||||
|
DE POPqq,
|
||||||
|
chkPS,
|
||||||
|
JR, L3 BWR ( execute-B301 )
|
11
blk/306
Normal file
11
blk/306
Normal file
@ -0,0 +1,11 @@
|
|||||||
|
( a b c -- b c a )
|
||||||
|
CODE ROT
|
||||||
|
HL POPqq, ( C )
|
||||||
|
DE POPqq, ( B )
|
||||||
|
BC POPqq, ( A )
|
||||||
|
chkPS,
|
||||||
|
DE PUSHqq, ( B )
|
||||||
|
HL PUSHqq, ( C )
|
||||||
|
BC PUSHqq, ( A )
|
||||||
|
;CODE
|
||||||
|
|
13
blk/307
Normal file
13
blk/307
Normal file
@ -0,0 +1,13 @@
|
|||||||
|
( a -- a a )
|
||||||
|
CODE DUP
|
||||||
|
HL POPqq, ( A )
|
||||||
|
chkPS,
|
||||||
|
HL PUSHqq, ( A )
|
||||||
|
HL PUSHqq, ( A )
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
( a -- )
|
||||||
|
CODE DROP
|
||||||
|
HL POPqq,
|
||||||
|
;CODE
|
||||||
|
|
10
blk/308
Normal file
10
blk/308
Normal file
@ -0,0 +1,10 @@
|
|||||||
|
( a b -- b a )
|
||||||
|
CODE SWAP
|
||||||
|
HL POPqq, ( B )
|
||||||
|
DE POPqq, ( A )
|
||||||
|
chkPS,
|
||||||
|
HL PUSHqq, ( B )
|
||||||
|
DE PUSHqq, ( A )
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
|
11
blk/309
Normal file
11
blk/309
Normal file
@ -0,0 +1,11 @@
|
|||||||
|
( a b -- a b a )
|
||||||
|
CODE OVER
|
||||||
|
HL POPqq, ( B )
|
||||||
|
DE POPqq, ( A )
|
||||||
|
chkPS,
|
||||||
|
DE PUSHqq, ( A )
|
||||||
|
HL PUSHqq, ( B )
|
||||||
|
DE PUSHqq, ( A )
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
|
16
blk/310
Normal file
16
blk/310
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
CODE PICK
|
||||||
|
HL POPqq,
|
||||||
|
chkPS,
|
||||||
|
( x2 )
|
||||||
|
L SLAr, H RLr,
|
||||||
|
SP ADDHLss,
|
||||||
|
C (HL) LDrr,
|
||||||
|
HL INCss,
|
||||||
|
B (HL) LDrr,
|
||||||
|
( check PS range before returning )
|
||||||
|
EXDEHL,
|
||||||
|
RAMSTART LDHL(nn), ( RAM+00 == INITIAL_SP )
|
||||||
|
DE SUBHLss,
|
||||||
|
CC L2 @ JPccnn, ( abortUnderflow-B298 )
|
||||||
|
BC PUSHqq,
|
||||||
|
;CODE
|
15
blk/311
Normal file
15
blk/311
Normal file
@ -0,0 +1,15 @@
|
|||||||
|
( Low-level part of ROLL. Example:
|
||||||
|
"1 2 3 4 4 (roll)" --> "1 3 4 4". No sanity checks, never
|
||||||
|
call with 0. )
|
||||||
|
CODE (roll)
|
||||||
|
HL POPqq,
|
||||||
|
B H LDrr,
|
||||||
|
C L LDrr,
|
||||||
|
SP ADDHLss,
|
||||||
|
HL INCss,
|
||||||
|
D H LDrr,
|
||||||
|
E L LDrr,
|
||||||
|
HL DECss,
|
||||||
|
HL DECss,
|
||||||
|
LDDR,
|
||||||
|
;CODE
|
8
blk/312
Normal file
8
blk/312
Normal file
@ -0,0 +1,8 @@
|
|||||||
|
( a b -- )
|
||||||
|
CODE 2DROP
|
||||||
|
HL POPqq,
|
||||||
|
HL POPqq,
|
||||||
|
chkPS,
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
|
11
blk/313
Normal file
11
blk/313
Normal file
@ -0,0 +1,11 @@
|
|||||||
|
CODE S0
|
||||||
|
RAMSTART LDHL(nn), ( RAM+00 == INITIAL_SP )
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
CODE 'S
|
||||||
|
HL 0 LDddnn,
|
||||||
|
SP ADDHLss,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
||||||
|
|
14
blk/314
Normal file
14
blk/314
Normal file
@ -0,0 +1,14 @@
|
|||||||
|
CODE AND
|
||||||
|
HL POPqq,
|
||||||
|
DE POPqq,
|
||||||
|
chkPS,
|
||||||
|
A E LDrr,
|
||||||
|
L ANDr,
|
||||||
|
L A LDrr,
|
||||||
|
A D LDrr,
|
||||||
|
H ANDr,
|
||||||
|
H A LDrr,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
|
12
blk/315
Normal file
12
blk/315
Normal file
@ -0,0 +1,12 @@
|
|||||||
|
CODE OR
|
||||||
|
HL POPqq,
|
||||||
|
DE POPqq,
|
||||||
|
chkPS,
|
||||||
|
A E LDrr,
|
||||||
|
L ORr,
|
||||||
|
L A LDrr,
|
||||||
|
A D LDrr,
|
||||||
|
H ORr,
|
||||||
|
H A LDrr,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
12
blk/316
Normal file
12
blk/316
Normal file
@ -0,0 +1,12 @@
|
|||||||
|
CODE XOR
|
||||||
|
HL POPqq,
|
||||||
|
DE POPqq,
|
||||||
|
chkPS,
|
||||||
|
A E LDrr,
|
||||||
|
L XORr,
|
||||||
|
L A LDrr,
|
||||||
|
A D LDrr,
|
||||||
|
H XORr,
|
||||||
|
H A LDrr,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
8
blk/317
Normal file
8
blk/317
Normal file
@ -0,0 +1,8 @@
|
|||||||
|
CODE NOT
|
||||||
|
HL POPqq,
|
||||||
|
chkPS,
|
||||||
|
A L LDrr,
|
||||||
|
H ORr,
|
||||||
|
PUSHZ,
|
||||||
|
;CODE
|
||||||
|
|
15
blk/318
Normal file
15
blk/318
Normal file
@ -0,0 +1,15 @@
|
|||||||
|
CODE +
|
||||||
|
HL POPqq,
|
||||||
|
DE POPqq,
|
||||||
|
chkPS,
|
||||||
|
DE ADDHLss,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
CODE -
|
||||||
|
DE POPqq,
|
||||||
|
HL POPqq,
|
||||||
|
chkPS,
|
||||||
|
DE SUBHLss,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
16
blk/319
Normal file
16
blk/319
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
CODE * ( DE * BC -> DE (high) and HL (low) )
|
||||||
|
DE POPqq, BC POPqq, chkPS,
|
||||||
|
HL 0 LDddnn,
|
||||||
|
A 0x10 LDrn,
|
||||||
|
( loop )
|
||||||
|
HL ADDHLss,
|
||||||
|
E RLr, D RLr,
|
||||||
|
JRNC, 4 A, ( noinc )
|
||||||
|
BC ADDHLss,
|
||||||
|
JRNC, 1 A, ( noinc )
|
||||||
|
DE INCss,
|
||||||
|
( noinc )
|
||||||
|
A DECr,
|
||||||
|
JRNZ, -14 A, ( loop )
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
16
blk/320
Normal file
16
blk/320
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
( Borrowed from http://wikiti.brandonw.net/ )
|
||||||
|
( Divides AC by DE and places the quotient in AC and the
|
||||||
|
remainder in HL )
|
||||||
|
CODE /MOD
|
||||||
|
DE POPqq,
|
||||||
|
BC POPqq,
|
||||||
|
chkPS,
|
||||||
|
A B LDrr,
|
||||||
|
B 16 LDrn,
|
||||||
|
HL 0 LDddnn,
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
( cont. )
|
15
blk/321
Normal file
15
blk/321
Normal file
@ -0,0 +1,15 @@
|
|||||||
|
BEGIN, ( loop )
|
||||||
|
SCF,
|
||||||
|
C RLr,
|
||||||
|
RLA,
|
||||||
|
HL ADCHLss,
|
||||||
|
DE SBCHLss,
|
||||||
|
IFC,
|
||||||
|
DE ADDHLss,
|
||||||
|
C DECr,
|
||||||
|
THEN,
|
||||||
|
DJNZ, AGAIN, ( loop )
|
||||||
|
B A LDrr,
|
||||||
|
HL PUSHqq,
|
||||||
|
BC PUSHqq,
|
||||||
|
;CODE
|
16
blk/322
Normal file
16
blk/322
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
CODE !
|
||||||
|
HL POPqq,
|
||||||
|
DE POPqq,
|
||||||
|
chkPS,
|
||||||
|
(HL) E LDrr,
|
||||||
|
HL INCss,
|
||||||
|
(HL) D LDrr,
|
||||||
|
;CODE
|
||||||
|
CODE @
|
||||||
|
HL POPqq,
|
||||||
|
chkPS,
|
||||||
|
E (HL) LDrr,
|
||||||
|
HL INCss,
|
||||||
|
D (HL) LDrr,
|
||||||
|
DE PUSHqq,
|
||||||
|
;CODE
|
14
blk/323
Normal file
14
blk/323
Normal file
@ -0,0 +1,14 @@
|
|||||||
|
CODE C!
|
||||||
|
HL POPqq,
|
||||||
|
DE POPqq,
|
||||||
|
chkPS,
|
||||||
|
(HL) E LDrr,
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
CODE C@
|
||||||
|
HL POPqq,
|
||||||
|
chkPS,
|
||||||
|
L (HL) LDrr,
|
||||||
|
H 0 LDrn,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
15
blk/324
Normal file
15
blk/324
Normal file
@ -0,0 +1,15 @@
|
|||||||
|
CODE PC!
|
||||||
|
BC POPqq,
|
||||||
|
HL POPqq,
|
||||||
|
chkPS,
|
||||||
|
L OUT(C)r,
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
CODE PC@
|
||||||
|
BC POPqq,
|
||||||
|
chkPS,
|
||||||
|
H 0 LDrn,
|
||||||
|
L INr(C),
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
||||||
|
|
16
blk/325
Normal file
16
blk/325
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
CODE I
|
||||||
|
L 0 IX+ LDrIXY,
|
||||||
|
H 1 IX+ LDrIXY,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
||||||
|
CODE I'
|
||||||
|
L 2 IX- LDrIXY,
|
||||||
|
H 1 IX- LDrIXY,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
||||||
|
CODE J
|
||||||
|
L 4 IX- LDrIXY,
|
||||||
|
H 3 IX- LDrIXY,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
||||||
|
|
13
blk/326
Normal file
13
blk/326
Normal file
@ -0,0 +1,13 @@
|
|||||||
|
CODE >R
|
||||||
|
HL POPqq,
|
||||||
|
chkPS,
|
||||||
|
( 17 == pushRS )
|
||||||
|
17 CALLnn,
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
CODE R>
|
||||||
|
( 20 == popRS )
|
||||||
|
20 CALLnn,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
||||||
|
|
14
blk/327
Normal file
14
blk/327
Normal file
@ -0,0 +1,14 @@
|
|||||||
|
CODE BYE
|
||||||
|
HALT,
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
CODE (resSP)
|
||||||
|
( INITIAL_SP == RAM+0 )
|
||||||
|
SP RAMSTART LDdd(nn),
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
CODE (resRS)
|
||||||
|
IX RS_ADDR LDddnn,
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
|
16
blk/328
Normal file
16
blk/328
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
CODE S=
|
||||||
|
DE POPqq,
|
||||||
|
HL POPqq,
|
||||||
|
chkPS,
|
||||||
|
BEGIN, ( loop )
|
||||||
|
LDA(DE),
|
||||||
|
(HL) CPr,
|
||||||
|
JRNZ, L1 FWR ( not equal? break early to "end".
|
||||||
|
NZ is set. )
|
||||||
|
A ORr, ( if our char is null, stop )
|
||||||
|
HL INCss,
|
||||||
|
DE INCss,
|
||||||
|
JRNZ, AGAIN, ( loop )
|
||||||
|
L1 FSET ( end )
|
||||||
|
PUSHZ,
|
||||||
|
;CODE
|
16
blk/329
Normal file
16
blk/329
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
CODE CMP
|
||||||
|
HL POPqq,
|
||||||
|
DE POPqq,
|
||||||
|
chkPS,
|
||||||
|
DE SUBHLss,
|
||||||
|
BC 0 LDddnn,
|
||||||
|
IFNZ, ( < or > )
|
||||||
|
BC INCss,
|
||||||
|
IFNC, ( < )
|
||||||
|
BC DECss,
|
||||||
|
BC DECss,
|
||||||
|
THEN,
|
||||||
|
THEN,
|
||||||
|
BC PUSHqq,
|
||||||
|
;CODE
|
||||||
|
|
16
blk/330
Normal file
16
blk/330
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
CODE _find ( cur w -- a f )
|
||||||
|
HL POPqq, ( w )
|
||||||
|
DE POPqq, ( cur )
|
||||||
|
chkPS,
|
||||||
|
( 3 == find )
|
||||||
|
3 CALLnn,
|
||||||
|
IFNZ,
|
||||||
|
( not found )
|
||||||
|
HL PUSHqq,
|
||||||
|
PUSH0,
|
||||||
|
JPNEXT,
|
||||||
|
THEN,
|
||||||
|
( found )
|
||||||
|
DE PUSHqq,
|
||||||
|
PUSH1,
|
||||||
|
;CODE
|
14
blk/331
Normal file
14
blk/331
Normal file
@ -0,0 +1,14 @@
|
|||||||
|
CODE (im1)
|
||||||
|
IM1,
|
||||||
|
EI,
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
CODE 0 PUSH0, ;CODE
|
||||||
|
CODE 1 PUSH1, ;CODE
|
||||||
|
|
||||||
|
CODE -1
|
||||||
|
HL -1 LDddnn,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
|
14
blk/332
Normal file
14
blk/332
Normal file
@ -0,0 +1,14 @@
|
|||||||
|
CODE 1+
|
||||||
|
HL POPqq,
|
||||||
|
chkPS,
|
||||||
|
HL INCss,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
CODE 1-
|
||||||
|
HL POPqq,
|
||||||
|
chkPS,
|
||||||
|
HL DECss,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
||||||
|
|
16
blk/333
Normal file
16
blk/333
Normal file
@ -0,0 +1,16 @@
|
|||||||
|
CODE 2+
|
||||||
|
HL POPqq,
|
||||||
|
chkPS,
|
||||||
|
HL INCss,
|
||||||
|
HL INCss,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
||||||
|
|
||||||
|
CODE 2-
|
||||||
|
HL POPqq,
|
||||||
|
chkPS,
|
||||||
|
HL DECss,
|
||||||
|
HL DECss,
|
||||||
|
HL PUSHqq,
|
||||||
|
;CODE
|
||||||
|
|
@ -2,7 +2,6 @@ TARGETS = forth/forth
|
|||||||
# Those Forth source files are in a particular order
|
# Those Forth source files are in a particular order
|
||||||
BOOTSRCS = ./forth/conf.fs \
|
BOOTSRCS = ./forth/conf.fs \
|
||||||
./forth/xcomp.fs \
|
./forth/xcomp.fs \
|
||||||
../forth/boot.z80 \
|
|
||||||
../forth/icore.fs \
|
../forth/icore.fs \
|
||||||
./forth/xstop.fs
|
./forth/xstop.fs
|
||||||
|
|
||||||
|
@ -1,4 +1,4 @@
|
|||||||
262 LOAD
|
262 LOAD ( xcomp )
|
||||||
: CODE XCODE ;
|
: CODE XCODE ;
|
||||||
: IMMEDIATE XIMM ;
|
: IMMEDIATE XIMM ;
|
||||||
: : [ ' X: , ] ;
|
: : [ ' X: , ] ;
|
||||||
@ -7,3 +7,4 @@ CURRENT @ XCURRENT !
|
|||||||
|
|
||||||
H@ 256 /MOD 2 PC! 2 PC!
|
H@ 256 /MOD 2 PC! 2 PC!
|
||||||
H@ XOFF !
|
H@ XOFF !
|
||||||
|
282 LOAD ( boot.z80 )
|
||||||
|
Binary file not shown.
@ -86,3 +86,6 @@
|
|||||||
R> DROP ( BLK> )
|
R> DROP ( BLK> )
|
||||||
THEN
|
THEN
|
||||||
;
|
;
|
||||||
|
|
||||||
|
( b1 b2 -- )
|
||||||
|
: LOADR 1+ SWAP DO I DUP . CRLF LOAD LOOP ;
|
||||||
|
764
forth/boot.z80
764
forth/boot.z80
@ -1,764 +0,0 @@
|
|||||||
( Configuration words: RAMSTART, RS_ADDR )
|
|
||||||
H@ 256 /MOD 2 PC! 2 PC!
|
|
||||||
|
|
||||||
( RESERVED REGISTERS
|
|
||||||
|
|
||||||
At all times, IX points to RSP TOS and IY is IP. SP points
|
|
||||||
to PSP TOS, but you can still use the stack in native code.
|
|
||||||
you just have to make sure you've restored it before "next".
|
|
||||||
|
|
||||||
STABLE ABI
|
|
||||||
Those jumps below are supposed to stay at these offsets,
|
|
||||||
always. If they change bootstrap binaries have to be
|
|
||||||
adjusted because they rely on them. Those entries are
|
|
||||||
referenced directly by their offset in Forth code with a
|
|
||||||
comment indicating what that number refers to.
|
|
||||||
)
|
|
||||||
|
|
||||||
H@ ORG !
|
|
||||||
|
|
||||||
0 JPnn, ( 00, main )
|
|
||||||
0 JPnn, ( 03, find )
|
|
||||||
NOP, NOP, ( 06, unused )
|
|
||||||
NOP, NOP, ( 08, LATEST )
|
|
||||||
NOP, ( 0a, unused )
|
|
||||||
0 JPnn, ( 0b, cellWord )
|
|
||||||
0 JPnn, ( 0e, compiledWord )
|
|
||||||
0 JPnn, ( 11, pushRS )
|
|
||||||
0 JPnn, ( 14, popRS )
|
|
||||||
EXDEHL, JP(HL), NOP, ( 17, nativeWord )
|
|
||||||
0 JPnn, ( 1a, next )
|
|
||||||
0 JPnn, ( 1d, chkPS )
|
|
||||||
NOP, NOP, ( 20, numberWord )
|
|
||||||
NOP, NOP, ( 22, litWord )
|
|
||||||
NOP, NOP, ( 24, addrWord )
|
|
||||||
NOP, NOP, ( 26, unused )
|
|
||||||
RAMSTART 0x4e + JPnn, ( 28, RST 28 )
|
|
||||||
0 JPnn, ( 2b, doesWord )
|
|
||||||
NOP, NOP, ( 2e, unused )
|
|
||||||
RAMSTART 0x4e + JPnn, ( RST 30 )
|
|
||||||
0 JPnn, ( 33, execute )
|
|
||||||
NOP, NOP, ( unused )
|
|
||||||
RAMSTART 0x4e + JPnn, ( RST 38 )
|
|
||||||
|
|
||||||
( BOOT DICT
|
|
||||||
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"
|
|
||||||
)
|
|
||||||
'E' A, 'X' A, 'I' A, 'T' A,
|
|
||||||
0 A,, ( prev )
|
|
||||||
4 A,
|
|
||||||
H@ XCURRENT ! ( set current tip of dict, 0x42 )
|
|
||||||
0x17 A, ( nativeWord )
|
|
||||||
0x14 CALLnn, ( popRS )
|
|
||||||
HL PUSHqq, IY POPqq, ( --> IP )
|
|
||||||
JPNEXT,
|
|
||||||
|
|
||||||
CODE (br) ( 0x53 )
|
|
||||||
L2 BSET ( used in CBR )
|
|
||||||
E 0 IY+ LDrIXY,
|
|
||||||
D 1 IY+ LDrIXY,
|
|
||||||
DE ADDIYss,
|
|
||||||
JPNEXT,
|
|
||||||
|
|
||||||
CODE (?br) ( 0x67 )
|
|
||||||
HL POPqq,
|
|
||||||
chkPS,
|
|
||||||
A H LDrr,
|
|
||||||
L ORr,
|
|
||||||
JRZ, L2 BWR ( BR + 2. False, branch )
|
|
||||||
( True, skip next 2 bytes and don't branch )
|
|
||||||
IY INCss,
|
|
||||||
IY INCss,
|
|
||||||
JPNEXT,
|
|
||||||
|
|
||||||
( 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.
|
|
||||||
)
|
|
||||||
E 0 IY+ LDrIXY,
|
|
||||||
D 1 IY+ LDrIXY,
|
|
||||||
IY INCss,
|
|
||||||
IY INCss,
|
|
||||||
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 )
|
|
||||||
IY PUSHqq, HL POPqq, ( <-- 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... )
|
|
||||||
HL PUSHqq, IY POPqq, ( --> IP )
|
|
||||||
JPNEXT,
|
|
||||||
|
|
||||||
( Name of BOOT word )
|
|
||||||
L1 BSET
|
|
||||||
'B' A, 'O' A, 'O' A, 'T' A, 0 A,
|
|
||||||
|
|
||||||
PC ORG @ 1 + ! ( main )
|
|
||||||
( STACK OVERFLOW PROTECTION:
|
|
||||||
To avoid having to check for stack underflow after each pop
|
|
||||||
operation (which can end up being prohibitive in terms of
|
|
||||||
costs), we give ourselves a nice 6 bytes buffer. 6 bytes
|
|
||||||
because we seldom have words requiring more than 3 items
|
|
||||||
from the stack. Then, at each "exit" call we check for
|
|
||||||
stack underflow.
|
|
||||||
)
|
|
||||||
SP 0xfffa LDddnn,
|
|
||||||
RAMSTART SP LD(nn)dd, ( RAM+00 == INITIAL_SP )
|
|
||||||
IX RS_ADDR LDddnn,
|
|
||||||
( HERE begins at RAMEND )
|
|
||||||
HL RAMSTART 0x80 + LDddnn,
|
|
||||||
RAMSTART 0x04 + LD(nn)HL, ( RAM+04 == HERE )
|
|
||||||
( LATEST is a label to the latest entry of the dict. It is
|
|
||||||
written at offset 0x08 by the process or person building
|
|
||||||
Forth. )
|
|
||||||
0x08 LDHL(nn),
|
|
||||||
RAMSTART 0x02 + LD(nn)HL, ( RAM+02 == CURRENT )
|
|
||||||
EXDEHL,
|
|
||||||
HL L1 @ LDddnn,
|
|
||||||
0x03 CALLnn, ( 03 == find )
|
|
||||||
0x33 JPnn, ( 33 == execute )
|
|
||||||
|
|
||||||
PC ORG @ 4 + ! ( find )
|
|
||||||
( Find the entry corresponding to word name where (HL) points
|
|
||||||
to in dictionary having its tip at DE and sets DE to point
|
|
||||||
to that entry. Z if found, NZ if not.
|
|
||||||
)
|
|
||||||
|
|
||||||
BC PUSHqq,
|
|
||||||
HL PUSHqq,
|
|
||||||
( First, figure out string len )
|
|
||||||
BC 0 LDddnn,
|
|
||||||
A XORr,
|
|
||||||
CPIR,
|
|
||||||
( C has our length, negative, -1 )
|
|
||||||
A C LDrr,
|
|
||||||
NEG,
|
|
||||||
A DECr,
|
|
||||||
( special case. zero len? we never find anything. )
|
|
||||||
JRZ, L1 FWR ( fail )
|
|
||||||
|
|
||||||
C A LDrr, ( C holds our length )
|
|
||||||
( Let's do something weird: We'll hold HL by the *tail*.
|
|
||||||
Because of our dict structure and because we know our
|
|
||||||
lengths, it's easier to compare starting from the end.
|
|
||||||
Currently, after CPIR, HL points to char after null. Let's
|
|
||||||
adjust. Because the compare loop pre-decrements, instead
|
|
||||||
of DECing HL twice, we DEC it once. )
|
|
||||||
HL DECss,
|
|
||||||
BEGIN, ( inner )
|
|
||||||
( DE is a wordref, first step, do our len correspond? )
|
|
||||||
HL PUSHqq, ( --> lvl 1 )
|
|
||||||
DE PUSHqq, ( --> lvl 2 )
|
|
||||||
DE DECss,
|
|
||||||
LDA(DE),
|
|
||||||
0x7f ANDn, ( remove IMMEDIATE flag )
|
|
||||||
C CPr,
|
|
||||||
JRNZ, L2 FWR ( loopend )
|
|
||||||
( match, let's compare the string then )
|
|
||||||
DE DECss, ( Skip prev field. One less because we )
|
|
||||||
DE DECss, ( pre-decrement )
|
|
||||||
B C LDrr, ( loop C times )
|
|
||||||
BEGIN, ( loop )
|
|
||||||
( pre-decrement for easier Z matching )
|
|
||||||
DE DECss,
|
|
||||||
HL DECss,
|
|
||||||
LDA(DE),
|
|
||||||
(HL) CPr,
|
|
||||||
JRNZ, L3 FWR ( loopend )
|
|
||||||
DJNZ, AGAIN, ( loop )
|
|
||||||
L2 FSET L3 FSET ( loopend )
|
|
||||||
( At this point, Z is set if we have a match. In all cases,
|
|
||||||
we want to pop HL and DE )
|
|
||||||
DE POPqq, ( <-- lvl 2 )
|
|
||||||
HL POPqq, ( <-- lvl 1 )
|
|
||||||
JRZ, L2 FWR ( end, match? we're done! )
|
|
||||||
( no match, go to prev and continue )
|
|
||||||
HL PUSHqq, ( --> lvl 1 )
|
|
||||||
DE DECss,
|
|
||||||
DE DECss,
|
|
||||||
DE DECss, ( prev field )
|
|
||||||
DE PUSHqq, ( --> lvl 2 )
|
|
||||||
EXDEHL,
|
|
||||||
E (HL) LDrr,
|
|
||||||
HL INCss,
|
|
||||||
D (HL) LDrr,
|
|
||||||
( DE conains prev offset )
|
|
||||||
HL POPqq, ( <-- lvl 2 )
|
|
||||||
( HL is prev field's addr. Is offset zero? )
|
|
||||||
A D LDrr,
|
|
||||||
E ORr,
|
|
||||||
IFNZ, ( noprev )
|
|
||||||
( get absolute addr from offset )
|
|
||||||
( carry cleared from "or e" )
|
|
||||||
DE SBCHLss,
|
|
||||||
EXDEHL, ( result in DE )
|
|
||||||
THEN, ( noprev )
|
|
||||||
HL POPqq, ( <-- lvl 1 )
|
|
||||||
JRNZ, AGAIN, ( inner, try to match again )
|
|
||||||
( Z set? end of dict, unset Z )
|
|
||||||
L1 FSET ( fail )
|
|
||||||
A XORr,
|
|
||||||
A INCr,
|
|
||||||
L2 FSET ( end )
|
|
||||||
HL POPqq,
|
|
||||||
BC POPqq,
|
|
||||||
RET,
|
|
||||||
|
|
||||||
PC ORG @ 0x12 + ! ( pushRS )
|
|
||||||
IX INCss,
|
|
||||||
IX INCss,
|
|
||||||
0 IX+ L LDIXYr,
|
|
||||||
1 IX+ H LDIXYr,
|
|
||||||
RET,
|
|
||||||
|
|
||||||
PC ORG @ 0x15 + ! ( popRS )
|
|
||||||
L 0 IX+ LDrIXY,
|
|
||||||
H 1 IX+ LDrIXY,
|
|
||||||
IX DECss,
|
|
||||||
IX DECss,
|
|
||||||
RET,
|
|
||||||
|
|
||||||
'(' A, 'u' A, 'f' A, 'l' A, 'w' A, ')' A, 0 A,
|
|
||||||
L2 BSET ( abortUnderflow )
|
|
||||||
HL PC 7 - LDddnn,
|
|
||||||
DE RAMSTART 0x02 + LDdd(nn), ( RAM+02 == CURRENT )
|
|
||||||
0x03 CALLnn, ( find )
|
|
||||||
0x33 JPnn, ( 33 == execute )
|
|
||||||
|
|
||||||
|
|
||||||
PC ORG @ 0x1e + ! ( chkPS )
|
|
||||||
HL PUSHqq,
|
|
||||||
RAMSTART LDHL(nn), ( RAM+00 == INITIAL_SP )
|
|
||||||
( We have the return address for this very call on the stack
|
|
||||||
and protected registers. Let's compensate )
|
|
||||||
HL DECss,
|
|
||||||
HL DECss,
|
|
||||||
HL DECss,
|
|
||||||
HL DECss,
|
|
||||||
SP SUBHLss,
|
|
||||||
HL POPqq,
|
|
||||||
CNC RETcc, ( INITIAL_SP >= SP? good )
|
|
||||||
JR, L2 BWR ( abortUnderflow )
|
|
||||||
|
|
||||||
PC ORG @ 0x1b + ! ( next )
|
|
||||||
( This routine is jumped to at the end of every word. In it,
|
|
||||||
we jump to current IP, but we also take care of increasing
|
|
||||||
it by 2 before jumping. )
|
|
||||||
( Before we continue: are stacks within bounds? )
|
|
||||||
0x1d CALLnn, ( chkPS )
|
|
||||||
( check RS )
|
|
||||||
IX PUSHqq, HL POPqq,
|
|
||||||
DE RS_ADDR LDddnn,
|
|
||||||
DE SUBHLss,
|
|
||||||
JRC, L2 BWR ( IX < RS_ADDR? abortUnderflow )
|
|
||||||
E 0 IY+ LDrIXY,
|
|
||||||
D 1 IY+ LDrIXY,
|
|
||||||
IY INCss,
|
|
||||||
IY INCss,
|
|
||||||
( continue to execute )
|
|
||||||
|
|
||||||
L3 BSET
|
|
||||||
PC ORG @ 0x34 + ! ( execute )
|
|
||||||
( DE points to wordref )
|
|
||||||
EXDEHL,
|
|
||||||
E (HL) LDrr,
|
|
||||||
D 0 LDrn,
|
|
||||||
EXDEHL,
|
|
||||||
( HL points to code pointer )
|
|
||||||
DE INCss,
|
|
||||||
( DE points to PFA )
|
|
||||||
JP(HL),
|
|
||||||
|
|
||||||
L1 BSET
|
|
||||||
PC ORG @ 0x0f + ! ( compiledWord )
|
|
||||||
( Execute a list of atoms, which always end with EXIT.
|
|
||||||
DE points to that list. What do we do:
|
|
||||||
1. Push current IP to RS
|
|
||||||
2. Set new IP to the second atom of the list
|
|
||||||
3. Execute the first atom of the list. )
|
|
||||||
IY PUSHqq, HL POPqq, ( <-- IP )
|
|
||||||
0x11 CALLnn, ( 11 == pushRS )
|
|
||||||
EXDEHL, ( HL points to PFA )
|
|
||||||
( While we increase, dereference into DE for execute call
|
|
||||||
later. )
|
|
||||||
E (HL) LDrr,
|
|
||||||
HL INCss,
|
|
||||||
D (HL) LDrr,
|
|
||||||
HL INCss,
|
|
||||||
HL PUSHqq, IY POPqq, ( --> IP )
|
|
||||||
JR, L3 BWR ( execute )
|
|
||||||
|
|
||||||
PC ORG @ 0x0c + ! ( cellWord )
|
|
||||||
( Pushes PFA directly )
|
|
||||||
DE PUSHqq,
|
|
||||||
JPNEXT,
|
|
||||||
|
|
||||||
PC ORG @ 0x2c + ! ( doesWord )
|
|
||||||
( The word was spawned from a definition word that has a
|
|
||||||
DOES>. PFA+2 (right after the actual cell) is a link to the
|
|
||||||
slot right after that DOES>. Therefore, what we need to do
|
|
||||||
push the cell addr like a regular cell, then follow the
|
|
||||||
linkfrom the PFA, and then continue as a regular
|
|
||||||
compiledWord.
|
|
||||||
)
|
|
||||||
DE PUSHqq, ( like a regular cell )
|
|
||||||
EXDEHL,
|
|
||||||
HL INCss,
|
|
||||||
HL INCss,
|
|
||||||
E (HL) LDrr,
|
|
||||||
HL INCss,
|
|
||||||
D (HL) LDrr,
|
|
||||||
JR, L1 BWR ( compiledWord )
|
|
||||||
|
|
||||||
( Core words )
|
|
||||||
KEY and EMIT are not defined here. There're
|
|
||||||
expected to be defined in platform-specific code. )
|
|
||||||
|
|
||||||
|
|
||||||
CODE EXECUTE
|
|
||||||
DE POPqq,
|
|
||||||
chkPS,
|
|
||||||
JR, L3 BWR ( execute )
|
|
||||||
|
|
||||||
( a b c -- b c a )
|
|
||||||
CODE ROT
|
|
||||||
HL POPqq, ( C )
|
|
||||||
DE POPqq, ( B )
|
|
||||||
BC POPqq, ( A )
|
|
||||||
chkPS,
|
|
||||||
DE PUSHqq, ( B )
|
|
||||||
HL PUSHqq, ( C )
|
|
||||||
BC PUSHqq, ( A )
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
( a -- a a )
|
|
||||||
CODE DUP
|
|
||||||
HL POPqq, ( A )
|
|
||||||
chkPS,
|
|
||||||
HL PUSHqq, ( A )
|
|
||||||
HL PUSHqq, ( A )
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
( a -- )
|
|
||||||
CODE DROP
|
|
||||||
HL POPqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
( a b -- b a )
|
|
||||||
CODE SWAP
|
|
||||||
HL POPqq, ( B )
|
|
||||||
DE POPqq, ( A )
|
|
||||||
chkPS,
|
|
||||||
HL PUSHqq, ( B )
|
|
||||||
DE PUSHqq, ( A )
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
( a b -- a b a )
|
|
||||||
CODE OVER
|
|
||||||
HL POPqq, ( B )
|
|
||||||
DE POPqq, ( A )
|
|
||||||
chkPS,
|
|
||||||
DE PUSHqq, ( A )
|
|
||||||
HL PUSHqq, ( B )
|
|
||||||
DE PUSHqq, ( A )
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE PICK
|
|
||||||
HL POPqq,
|
|
||||||
chkPS,
|
|
||||||
( x2 )
|
|
||||||
L SLAr,
|
|
||||||
H RLr,
|
|
||||||
SP ADDHLss,
|
|
||||||
C (HL) LDrr,
|
|
||||||
HL INCss,
|
|
||||||
B (HL) LDrr,
|
|
||||||
( check PS range before returning )
|
|
||||||
EXDEHL,
|
|
||||||
RAMSTART LDHL(nn), ( RAM+00 == INITIAL_SP )
|
|
||||||
DE SUBHLss,
|
|
||||||
CC L2 @ JPccnn, ( abortUnderflow )
|
|
||||||
BC PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
( this is only a part of ROLL, the other part is performed in
|
|
||||||
high level Forth. This receives from PSP the number of bytes
|
|
||||||
to copy and then performs A move-by-2 operation from SP.
|
|
||||||
This copies SP's TOS and overwrites the last item involved.
|
|
||||||
|
|
||||||
For example, if stack is "1 2 3 4", calling with "4" would
|
|
||||||
result in the stack "1 3 4 4". Never call with 0, there is
|
|
||||||
no sanity check.
|
|
||||||
)
|
|
||||||
CODE (roll)
|
|
||||||
HL POPqq,
|
|
||||||
B H LDrr,
|
|
||||||
C L LDrr,
|
|
||||||
SP ADDHLss,
|
|
||||||
HL INCss,
|
|
||||||
D H LDrr,
|
|
||||||
E L LDrr,
|
|
||||||
HL DECss,
|
|
||||||
HL DECss,
|
|
||||||
LDDR,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
( a b -- )
|
|
||||||
CODE 2DROP
|
|
||||||
HL POPqq,
|
|
||||||
HL POPqq,
|
|
||||||
chkPS,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE S0
|
|
||||||
RAMSTART LDHL(nn), ( RAM+00 == INITIAL_SP )
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE 'S
|
|
||||||
HL 0 LDddnn,
|
|
||||||
SP ADDHLss,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE AND
|
|
||||||
HL POPqq,
|
|
||||||
DE POPqq,
|
|
||||||
chkPS,
|
|
||||||
A E LDrr,
|
|
||||||
L ANDr,
|
|
||||||
L A LDrr,
|
|
||||||
A D LDrr,
|
|
||||||
H ANDr,
|
|
||||||
H A LDrr,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE OR
|
|
||||||
HL POPqq,
|
|
||||||
DE POPqq,
|
|
||||||
chkPS,
|
|
||||||
A E LDrr,
|
|
||||||
L ORr,
|
|
||||||
L A LDrr,
|
|
||||||
A D LDrr,
|
|
||||||
H ORr,
|
|
||||||
H A LDrr,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE XOR
|
|
||||||
HL POPqq,
|
|
||||||
DE POPqq,
|
|
||||||
chkPS,
|
|
||||||
A E LDrr,
|
|
||||||
L XORr,
|
|
||||||
L A LDrr,
|
|
||||||
A D LDrr,
|
|
||||||
H XORr,
|
|
||||||
H A LDrr,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE NOT
|
|
||||||
HL POPqq,
|
|
||||||
chkPS,
|
|
||||||
A L LDrr,
|
|
||||||
H ORr,
|
|
||||||
HL 0 LDddnn,
|
|
||||||
IFZ,
|
|
||||||
( false, make 1 )
|
|
||||||
HL INCss,
|
|
||||||
THEN,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE +
|
|
||||||
HL POPqq,
|
|
||||||
DE POPqq,
|
|
||||||
chkPS,
|
|
||||||
DE ADDHLss,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE -
|
|
||||||
DE POPqq,
|
|
||||||
HL POPqq,
|
|
||||||
chkPS,
|
|
||||||
DE SUBHLss,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE *
|
|
||||||
DE POPqq,
|
|
||||||
BC POPqq,
|
|
||||||
chkPS,
|
|
||||||
( DE * BC -> DE (high) and HL (low) )
|
|
||||||
HL 0 LDddnn,
|
|
||||||
A 0x10 LDrn,
|
|
||||||
( loop )
|
|
||||||
HL ADDHLss,
|
|
||||||
E RLr,
|
|
||||||
D RLr,
|
|
||||||
JRNC, 4 A, ( noinc )
|
|
||||||
BC ADDHLss,
|
|
||||||
JRNC, 1 A, ( noinc )
|
|
||||||
DE INCss,
|
|
||||||
( noinc )
|
|
||||||
A DECr,
|
|
||||||
JRNZ, -14 A, ( loop )
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
( Borrowed from http://wikiti.brandonw.net/ )
|
|
||||||
( Divides AC by DE and places the quotient in AC and the
|
|
||||||
remainder in HL )
|
|
||||||
CODE /MOD
|
|
||||||
DE POPqq,
|
|
||||||
BC POPqq,
|
|
||||||
chkPS,
|
|
||||||
A B LDrr,
|
|
||||||
B 16 LDrn,
|
|
||||||
HL 0 LDddnn,
|
|
||||||
BEGIN, ( loop )
|
|
||||||
SCF,
|
|
||||||
C RLr,
|
|
||||||
RLA,
|
|
||||||
HL ADCHLss,
|
|
||||||
DE SBCHLss,
|
|
||||||
IFC,
|
|
||||||
DE ADDHLss,
|
|
||||||
C DECr,
|
|
||||||
THEN,
|
|
||||||
DJNZ, AGAIN, ( loop )
|
|
||||||
B A LDrr,
|
|
||||||
HL PUSHqq,
|
|
||||||
BC PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE !
|
|
||||||
HL POPqq,
|
|
||||||
DE POPqq,
|
|
||||||
chkPS,
|
|
||||||
(HL) E LDrr,
|
|
||||||
HL INCss,
|
|
||||||
(HL) D LDrr,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE @
|
|
||||||
HL POPqq,
|
|
||||||
chkPS,
|
|
||||||
E (HL) LDrr,
|
|
||||||
HL INCss,
|
|
||||||
D (HL) LDrr,
|
|
||||||
DE PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE C!
|
|
||||||
HL POPqq,
|
|
||||||
DE POPqq,
|
|
||||||
chkPS,
|
|
||||||
(HL) E LDrr,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE C@
|
|
||||||
HL POPqq,
|
|
||||||
chkPS,
|
|
||||||
L (HL) LDrr,
|
|
||||||
H 0 LDrn,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE PC!
|
|
||||||
BC POPqq,
|
|
||||||
HL POPqq,
|
|
||||||
chkPS,
|
|
||||||
L OUT(C)r,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE PC@
|
|
||||||
BC POPqq,
|
|
||||||
chkPS,
|
|
||||||
H 0 LDrn,
|
|
||||||
L INr(C),
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE I
|
|
||||||
L 0 IX+ LDrIXY,
|
|
||||||
H 1 IX+ LDrIXY,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE I'
|
|
||||||
L 2 IX- LDrIXY,
|
|
||||||
H 1 IX- LDrIXY,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE J
|
|
||||||
L 4 IX- LDrIXY,
|
|
||||||
H 3 IX- LDrIXY,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE >R
|
|
||||||
HL POPqq,
|
|
||||||
chkPS,
|
|
||||||
( 17 == pushRS )
|
|
||||||
17 CALLnn,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE R>
|
|
||||||
( 20 == popRS )
|
|
||||||
20 CALLnn,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE BYE
|
|
||||||
HALT,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE (resSP)
|
|
||||||
( INITIAL_SP == RAM+0 )
|
|
||||||
SP RAMSTART LDdd(nn),
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE (resRS)
|
|
||||||
IX RS_ADDR LDddnn,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE S=
|
|
||||||
DE POPqq,
|
|
||||||
HL POPqq,
|
|
||||||
chkPS,
|
|
||||||
( pre-push false )
|
|
||||||
BC 0 LDddnn,
|
|
||||||
BC PUSHqq,
|
|
||||||
BEGIN, ( loop )
|
|
||||||
LDA(DE),
|
|
||||||
(HL) CPr,
|
|
||||||
JRNZ, L1 FWR ( not equal? break early to "end".
|
|
||||||
NZ is set. )
|
|
||||||
A ORr, ( if our char is null, stop )
|
|
||||||
HL INCss,
|
|
||||||
DE INCss,
|
|
||||||
JRNZ, AGAIN, ( loop )
|
|
||||||
( success, change false to true )
|
|
||||||
HL POPqq,
|
|
||||||
HL INCss,
|
|
||||||
HL PUSHqq,
|
|
||||||
L1 FSET ( end )
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE CMP
|
|
||||||
HL POPqq,
|
|
||||||
DE POPqq,
|
|
||||||
chkPS,
|
|
||||||
DE SUBHLss,
|
|
||||||
BC 0 LDddnn,
|
|
||||||
IFNZ,
|
|
||||||
( not equal )
|
|
||||||
BC INCss,
|
|
||||||
IFNC,
|
|
||||||
( < )
|
|
||||||
BC DECss,
|
|
||||||
BC DECss,
|
|
||||||
THEN,
|
|
||||||
THEN,
|
|
||||||
BC PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
( cur w -- a f )
|
|
||||||
CODE _find
|
|
||||||
HL POPqq, ( w )
|
|
||||||
DE POPqq, ( cur )
|
|
||||||
chkPS,
|
|
||||||
( 3 == find )
|
|
||||||
3 CALLnn,
|
|
||||||
IFNZ,
|
|
||||||
( not found )
|
|
||||||
HL PUSHqq,
|
|
||||||
DE 0 LDddnn,
|
|
||||||
DE PUSHqq,
|
|
||||||
JPNEXT,
|
|
||||||
THEN,
|
|
||||||
( found )
|
|
||||||
DE PUSHqq,
|
|
||||||
DE 1 LDddnn,
|
|
||||||
DE PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE (im1)
|
|
||||||
IM1,
|
|
||||||
EI,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE 0
|
|
||||||
HL 0 LDddnn,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE 1
|
|
||||||
HL 1 LDddnn,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE -1
|
|
||||||
HL -1 LDddnn,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE 1+
|
|
||||||
HL POPqq,
|
|
||||||
chkPS,
|
|
||||||
HL INCss,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE 1-
|
|
||||||
HL POPqq,
|
|
||||||
chkPS,
|
|
||||||
HL DECss,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE 2+
|
|
||||||
HL POPqq,
|
|
||||||
chkPS,
|
|
||||||
HL INCss,
|
|
||||||
HL INCss,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
||||||
|
|
||||||
CODE 2-
|
|
||||||
HL POPqq,
|
|
||||||
chkPS,
|
|
||||||
HL DECss,
|
|
||||||
HL DECss,
|
|
||||||
HL PUSHqq,
|
|
||||||
;CODE
|
|
@ -6,7 +6,6 @@ STAGE2 = $(EDIR)/stage2
|
|||||||
EMUL = $(BASEDIR)/emul/hw/rc2014/classic
|
EMUL = $(BASEDIR)/emul/hw/rc2014/classic
|
||||||
BOOTSRCS = conf.fs \
|
BOOTSRCS = conf.fs \
|
||||||
$(EDIR)/xcomp.fs \
|
$(EDIR)/xcomp.fs \
|
||||||
$(FDIR)/boot.z80 \
|
|
||||||
$(BASEDIR)/drv/acia.z80 \
|
$(BASEDIR)/drv/acia.z80 \
|
||||||
$(BASEDIR)/drv/sdc.z80 \
|
$(BASEDIR)/drv/sdc.z80 \
|
||||||
$(FDIR)/icore.fs \
|
$(FDIR)/icore.fs \
|
||||||
|
Loading…
Reference in New Issue
Block a user