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...
e95614755b
Author | SHA1 | Date | |
---|---|---|---|
|
e95614755b | ||
|
0b3f6253e4 |
@ -243,34 +243,75 @@ DEFINE:
|
|||||||
; been compiled by INTERPRET*. All those bytes will be copied as-is.
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; been compiled by INTERPRET*. All those bytes will be copied as-is.
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||||||
; All we need to do is to know how many bytes to copy. To do so, we
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; All we need to do is to know how many bytes to copy. To do so, we
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||||||
; skip compwords until EXIT is reached.
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; skip compwords until EXIT is reached.
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ld (HERE), hl ; where we write compwords.
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ex de, hl ; DE is our dest
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ld l, (ix)
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ld l, (ix)
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ld h, (ix+1)
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ld h, (ix+1)
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.loop:
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.loop:
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call HLPointsEXIT
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call HLPointsNUMBER
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jr z, .loopend
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jr nz, .notNUMBER
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call compSkip
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; is number
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ld bc, 4
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ldir
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jr .loop
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jr .loop
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.loopend:
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.notNUMBER:
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; At this point, HL points to EXIT compword. We'll copy it too.
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call HLPointsLIT
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; We'll use LDIR. BC will be RSTOP-OLDRSTOP+2
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jr nz, .notLIT
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ld e, (ix)
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; is lit
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ld d, (ix+1)
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ldi
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inc hl \ inc hl ; our +2
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ldi
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or a ; clear carry
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inc hl \ inc hl
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sbc hl, de
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call strcpyM
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ld b, h
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inc hl ; byte after word termination
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ld c, l
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jr .loop
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; BC has proper count
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.notLIT:
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ex de, hl ; HL is our source (old RS' TOS)
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; it's a word
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ld de, (HERE) ; and DE is our dest
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call HLPointsIMMED
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ldir ; go!
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jr nz, .notIMMED
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|
; Immediate word, we'll have to call it.
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|
; Before we make our call, let's save our current HL/DE position
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|
ld (HERE), de
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|
ld e, (hl)
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inc hl
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ld d, (hl)
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inc hl ; point to next word
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|
push de \ pop iy ; prepare for executeCodeLink
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ld (ix), l
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ld (ix+1), h
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; Push return address
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ld hl, .retList
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call pushRS
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; Ready!
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jp executeCodeLink
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.notIMMED:
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|
; a good old regular word. We have 2 bytes to copy. But before we do,
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; let's check whether it's an EXIT. LDI doesn't affect Z, so we can
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; make our jump later.
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call HLPointsEXIT
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ldi
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ldi
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jr nz, .loop
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; HL has our new RS' TOS
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; HL has our new RS' TOS
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ld (ix), l
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ld (ix), l
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ld (ix+1), h
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ld (ix+1), h
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ld (HERE), de ; update HERE
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ld (HERE), de ; update HERE
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jp exit
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jp exit
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|
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||||||
|
; This label is pushed to RS when an IMMED word is called. When that word calls
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|
; exit, this is where it returns. When we return, RS will need to be popped so
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; that we stay on the proper RS level.
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|
.retList:
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|
.dw .retWord
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.retWord:
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.dw .retEntry
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.retEntry:
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call popRS ; unwind stack
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; recall old HL / DE values
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ld l, (ix)
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ld h, (ix+1)
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ld de, (HERE)
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|
; continue!
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|
jr .loop
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|
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.db "DOES>"
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.db "DOES>"
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.fill 3
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.fill 3
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.dw DEFINE
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.dw DEFINE
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@ -293,10 +334,43 @@ DOES:
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ld (HERE), iy
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ld (HERE), iy
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jp exit
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jp exit
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|
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|
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.db "IMMEDIA"
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.db 0
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.dw DOES
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|
IMMEDIATE:
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.dw nativeWord
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ld hl, (CURRENT)
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|
dec hl
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|
dec hl
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|
dec hl
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|
inc (hl)
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|
jp exit
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|
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|
; ( n -- )
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|
.db "LITERAL"
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|
.db 1 ; IMMEDIATE
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|
.dw IMMEDIATE
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|
LITERAL:
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|
.dw nativeWord
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||||||
|
ld hl, (HERE)
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|
ld de, NUMBER
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|
ld (hl), e
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|
inc hl
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|
ld (hl), d
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|
inc hl
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|
pop de ; number from stack
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|
ld (hl), e
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|
inc hl
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|
ld (hl), d
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|
inc hl
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||||||
|
ld (HERE), hl
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||||||
|
jp exit
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||||||
|
|
||||||
; ( -- c )
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; ( -- c )
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.db "KEY"
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.db "KEY"
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.fill 5
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.fill 5
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.dw DOES
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.dw LITERAL
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KEY:
|
KEY:
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.dw nativeWord
|
.dw nativeWord
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call stdioGetC
|
call stdioGetC
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|
@ -25,39 +25,49 @@ Atom: A word of the type compiledWord contains, in its PF, a list of what we
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call "atoms". Those atoms are most of the time word references, but they can
|
call "atoms". Those atoms are most of the time word references, but they can
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also be references to NUMBER and LIT.
|
also be references to NUMBER and LIT.
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||||||
|
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||||||
*** Native Words ***
|
*** Defining words ***
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|
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||||||
: x ... -- Define a new word
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: x ... -- Define a new word
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; R:I -- Exit a colon definition
|
; R:I -- Exit a colon definition
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||||||
. n -- Print n in its decimal form
|
ALLOT n -- Move HERE by n bytes
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||||||
|
CREATE x -- Create cell named x. Doesn't allocate a PF.
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||||||
|
CONSTANT x n -- Creates cell x that when called pushes its value
|
||||||
|
DOES> -- See description at top of file
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||||||
|
IMMEDIATE -- Flag the latest defined word as immediate.
|
||||||
|
LITERAL n -- Inserts number from TOS as a literal
|
||||||
|
VARIABLE c -- Creates cell x with 2 bytes allocation.
|
||||||
|
|
||||||
|
*** Flow ***
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||||||
|
ELSE -- Branch to THEN
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|
EXECUTE a -- Execute wordref at addr a
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||||||
|
IF n -- Branch to ELSE or THEN if n is zero
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||||||
|
INTERPRET -- Get a line from stdin, compile it in tmp memory,
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||||||
|
then execute the compiled contents.
|
||||||
|
QUIT R:drop -- Return to interpreter promp immediately
|
||||||
|
THEN -- Does nothing. Serves as a branching merker for IF
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||||||
|
and ELSE.
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||||||
|
|
||||||
|
*** Stack ***
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||||||
|
DUP a -- a a
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||||||
|
OVER a b -- a b a
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||||||
|
SWAP a b -- b a
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||||||
|
|
||||||
|
*** Memory ***
|
||||||
@ a -- n Set n to value at address a
|
@ a -- n Set n to value at address a
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||||||
! n a -- Store n in address a
|
! n a -- Store n in address a
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||||||
|
? a -- Print value of addr a
|
||||||
|
+! n a -- Increase value of addr a by n
|
||||||
|
CURRENT -- n Set n to wordref of last added entry.
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||||||
|
HERE -- a Push HERE's address
|
||||||
|
|
||||||
|
*** Arithmetic ***
|
||||||
|
|
||||||
+ a b -- c a + b -> c
|
+ a b -- c a + b -> c
|
||||||
- a b -- c a - b -> c
|
- a b -- c a - b -> c
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||||||
* a b -- c a * b -> c
|
* a b -- c a * b -> c
|
||||||
/ a b -- c a / b -> c
|
/ a b -- c a / b -> c
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||||||
CREATE x -- Create cell named x. Doesn't allocate a PF.
|
|
||||||
CURRENT -- n Set n to wordref of last added entry.
|
*** I/O ***
|
||||||
DOES> -- See description at top of file
|
. n -- Print n in its decimal form
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||||||
DUP a -- a a
|
|
||||||
ELSE -- Branch to THEN
|
|
||||||
EMIT c -- Spit char c to stdout
|
EMIT c -- Spit char c to stdout
|
||||||
EXECUTE a -- Execute wordref at addr a
|
|
||||||
HERE -- a Push HERE's address
|
|
||||||
IF n -- Branch to ELSE or THEN if n is zero
|
|
||||||
QUIT R:drop -- Return to interpreter promp immediately
|
|
||||||
KEY -- c Get char c from stdin
|
KEY -- c Get char c from stdin
|
||||||
INTERPRET -- Get a line from stdin, compile it in tmp memory,
|
|
||||||
then execute the compiled contents.
|
|
||||||
OVER a b -- a b a
|
|
||||||
SWAP a b -- b a
|
|
||||||
THEN -- Does nothing. Serves as a branching merker for IF
|
|
||||||
and ELSE.
|
|
||||||
|
|
||||||
*** Core-but-Forth Words ***
|
|
||||||
|
|
||||||
? a -- Print value of addr a
|
|
||||||
+! n a -- Increase value of addr a by n
|
|
||||||
ALLOT n -- Move HERE by n bytes
|
|
||||||
CONSTANT x n -- Creates cell x that when called pushes its value
|
|
||||||
VARIABLE c -- Creates cell x with 2 bytes allocation.
|
|
||||||
|
@ -274,3 +274,20 @@ entryhead:
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|||||||
ld (HERE), hl
|
ld (HERE), hl
|
||||||
xor a ; set Z
|
xor a ; set Z
|
||||||
ret
|
ret
|
||||||
|
|
||||||
|
; Sets Z if wordref at (HL) is of the IMMEDIATE type
|
||||||
|
HLPointsIMMED:
|
||||||
|
push hl
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||||||
|
call intoHL
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||||||
|
dec hl
|
||||||
|
dec hl
|
||||||
|
dec hl
|
||||||
|
; We need an invert flag. We want to Z to be set when flag is non-zero.
|
||||||
|
ld a, 1
|
||||||
|
and (hl)
|
||||||
|
dec a ; if A was 1, Z is set. Otherwise, Z is unset
|
||||||
|
inc hl
|
||||||
|
inc hl
|
||||||
|
inc hl
|
||||||
|
pop hl
|
||||||
|
ret
|
||||||
|
4
emul/.gitignore
vendored
4
emul/.gitignore
vendored
@ -1,5 +1,5 @@
|
|||||||
/shell/shell
|
/shell/shell
|
||||||
/bshell/shell
|
/forth/forth
|
||||||
/zasm/zasm
|
/zasm/zasm
|
||||||
/zasm/avra
|
/zasm/avra
|
||||||
/runbin/runbin
|
/runbin/runbin
|
||||||
@ -7,6 +7,4 @@
|
|||||||
/*/*.bin
|
/*/*.bin
|
||||||
/cfsin/zasm
|
/cfsin/zasm
|
||||||
/cfsin/ed
|
/cfsin/ed
|
||||||
/cfsin/basic
|
|
||||||
/cfsin/forth
|
|
||||||
/cfsin/user.h
|
/cfsin/user.h
|
||||||
|
@ -1,10 +1,10 @@
|
|||||||
CFSPACK_OBJ = ../tools/cfspack/libcfs.o
|
CFSPACK_OBJ = ../tools/cfspack/libcfs.o
|
||||||
TARGETS = shell/shell zasm/zasm runbin/runbin
|
TARGETS = shell/shell zasm/zasm runbin/runbin forth/forth
|
||||||
KERNEL = ../kernel
|
KERNEL = ../kernel
|
||||||
APPS = ../apps
|
APPS = ../apps
|
||||||
ZASMBIN = zasm/zasm
|
ZASMBIN = zasm/zasm
|
||||||
AVRABIN = zasm/avra
|
AVRABIN = zasm/avra
|
||||||
SHELLAPPS = zasm ed forth
|
SHELLAPPS = zasm ed
|
||||||
SHELLTGTS = ${SHELLAPPS:%=cfsin/%}
|
SHELLTGTS = ${SHELLAPPS:%=cfsin/%}
|
||||||
CFSIN_CONTENTS = $(SHELLTGTS) cfsin/user.h
|
CFSIN_CONTENTS = $(SHELLTGTS) cfsin/user.h
|
||||||
OBJS = emul.o libz80/libz80.o
|
OBJS = emul.o libz80/libz80.o
|
||||||
@ -24,6 +24,15 @@ shell/shell-bin.h: shell/shell.bin
|
|||||||
shell/shell: shell/shell.c $(SHELLOBJS) shell/shell-bin.h
|
shell/shell: shell/shell.c $(SHELLOBJS) shell/shell-bin.h
|
||||||
$(CC) shell/shell.c $(SHELLOBJS) -o $@
|
$(CC) shell/shell.c $(SHELLOBJS) -o $@
|
||||||
|
|
||||||
|
forth/forth.bin: forth/glue.asm $(ZASMBIN)
|
||||||
|
$(ZASMBIN) $(KERNEL) $(APPS) < forth/glue.asm | tee $@ > /dev/null
|
||||||
|
|
||||||
|
forth/forth-bin.h: forth/forth.bin
|
||||||
|
./bin2c.sh KERNEL < forth/forth.bin | tee $@ > /dev/null
|
||||||
|
|
||||||
|
forth/forth: forth/forth.c $(OBJS) forth/forth-bin.h
|
||||||
|
$(CC) forth/forth.c $(OBJS) -o $@
|
||||||
|
|
||||||
zasm/kernel-bin.h: zasm/kernel.bin
|
zasm/kernel-bin.h: zasm/kernel.bin
|
||||||
./bin2c.sh KERNEL < zasm/kernel.bin | tee $@ > /dev/null
|
./bin2c.sh KERNEL < zasm/kernel.bin | tee $@ > /dev/null
|
||||||
|
|
||||||
|
68
emul/forth/forth.c
Normal file
68
emul/forth/forth.c
Normal file
@ -0,0 +1,68 @@
|
|||||||
|
#include <stdint.h>
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <unistd.h>
|
||||||
|
#include <termios.h>
|
||||||
|
#include "../emul.h"
|
||||||
|
#include "forth-bin.h"
|
||||||
|
|
||||||
|
// in sync with glue.asm
|
||||||
|
#define RAMSTART 0x2000
|
||||||
|
#define STDIO_PORT 0x00
|
||||||
|
|
||||||
|
static int running;
|
||||||
|
|
||||||
|
static uint8_t iord_stdio()
|
||||||
|
{
|
||||||
|
int c = getchar();
|
||||||
|
if (c == EOF) {
|
||||||
|
running = 0;
|
||||||
|
}
|
||||||
|
return (uint8_t)c;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void iowr_stdio(uint8_t val)
|
||||||
|
{
|
||||||
|
if (val == 0x04) { // CTRL+D
|
||||||
|
running = 0;
|
||||||
|
} else {
|
||||||
|
putchar(val);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
int main(int argc, char *argv[])
|
||||||
|
{
|
||||||
|
bool tty = isatty(fileno(stdin));
|
||||||
|
struct termios termInfo;
|
||||||
|
if (tty) {
|
||||||
|
// Turn echo off: the shell takes care of its own echoing.
|
||||||
|
if (tcgetattr(0, &termInfo) == -1) {
|
||||||
|
printf("Can't setup terminal.\n");
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
termInfo.c_lflag &= ~ECHO;
|
||||||
|
termInfo.c_lflag &= ~ICANON;
|
||||||
|
tcsetattr(0, TCSAFLUSH, &termInfo);
|
||||||
|
}
|
||||||
|
|
||||||
|
Machine *m = emul_init();
|
||||||
|
m->ramstart = RAMSTART;
|
||||||
|
m->iord[STDIO_PORT] = iord_stdio;
|
||||||
|
m->iowr[STDIO_PORT] = iowr_stdio;
|
||||||
|
// initialize memory
|
||||||
|
for (int i=0; i<sizeof(KERNEL); i++) {
|
||||||
|
m->mem[i] = KERNEL[i];
|
||||||
|
}
|
||||||
|
// Run!
|
||||||
|
running = 1;
|
||||||
|
|
||||||
|
while (running && emul_step());
|
||||||
|
|
||||||
|
if (tty) {
|
||||||
|
printf("Done!\n");
|
||||||
|
termInfo.c_lflag |= ECHO;
|
||||||
|
termInfo.c_lflag |= ICANON;
|
||||||
|
tcsetattr(0, TCSAFLUSH, &termInfo);
|
||||||
|
emul_printdebug();
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
40
emul/forth/glue.asm
Normal file
40
emul/forth/glue.asm
Normal file
@ -0,0 +1,40 @@
|
|||||||
|
.inc "ascii.h"
|
||||||
|
.equ RAMSTART 0x2000
|
||||||
|
.equ STDIO_PORT 0x00
|
||||||
|
|
||||||
|
jp init
|
||||||
|
|
||||||
|
.inc "core.asm"
|
||||||
|
.inc "str.asm"
|
||||||
|
|
||||||
|
.equ STDIO_RAMSTART RAMSTART
|
||||||
|
.equ STDIO_GETC emulGetC
|
||||||
|
.equ STDIO_PUTC emulPutC
|
||||||
|
.inc "stdio.asm"
|
||||||
|
|
||||||
|
.inc "lib/util.asm"
|
||||||
|
.inc "lib/parse.asm"
|
||||||
|
.inc "lib/ari.asm"
|
||||||
|
.inc "lib/fmt.asm"
|
||||||
|
.equ FORTH_RAMSTART STDIO_RAMEND
|
||||||
|
.inc "forth/main.asm"
|
||||||
|
.inc "forth/util.asm"
|
||||||
|
.inc "forth/stack.asm"
|
||||||
|
.inc "forth/dict.asm"
|
||||||
|
|
||||||
|
init:
|
||||||
|
di
|
||||||
|
; setup stack
|
||||||
|
ld sp, 0xffff
|
||||||
|
call forthMain
|
||||||
|
halt
|
||||||
|
|
||||||
|
emulGetC:
|
||||||
|
; Blocks until a char is returned
|
||||||
|
in a, (STDIO_PORT)
|
||||||
|
cp a ; ensure Z
|
||||||
|
ret
|
||||||
|
|
||||||
|
emulPutC:
|
||||||
|
out (STDIO_PORT), a
|
||||||
|
ret
|
Loading…
Reference in New Issue
Block a user