From fd691957992132bb04833d235b63e8bd36a84cab Mon Sep 17 00:00:00 2001 From: Virgil Dupras Date: Sun, 16 Aug 2020 08:19:35 -0400 Subject: [PATCH] doc: take dictionary out of blkfs --- blk/001 | 2 +- blk/030 | 12 --- blk/031 | 16 --- blk/032 | 9 -- blk/034 | 16 --- blk/035 | 3 - blk/037 | 16 --- blk/038 | 5 - blk/040 | 15 --- blk/042 | 16 --- blk/043 | 16 --- blk/044 | 5 - blk/046 | 16 --- blk/047 | 6 -- blk/048 | 9 -- blk/050 | 16 --- blk/051 | 10 -- blk/052 | 10 -- blk/054 | 16 --- blk/056 | 12 --- blk/058 | 7 -- blk/060 | 16 --- blk/061 | 16 --- blk/062 | 9 -- blk/064 | 16 --- blk/150 | 3 +- cvm/vm.c | 2 +- doc/dict.txt | 281 +++++++++++++++++++++++++++++++++++++++++++++++++ doc/primer.txt | 9 +- 29 files changed, 289 insertions(+), 296 deletions(-) delete mode 100644 blk/030 delete mode 100644 blk/031 delete mode 100644 blk/032 delete mode 100644 blk/034 delete mode 100644 blk/035 delete mode 100644 blk/037 delete mode 100644 blk/038 delete mode 100644 blk/040 delete mode 100644 blk/042 delete mode 100644 blk/043 delete mode 100644 blk/044 delete mode 100644 blk/046 delete mode 100644 blk/047 delete mode 100644 blk/048 delete mode 100644 blk/050 delete mode 100644 blk/051 delete mode 100644 blk/052 delete mode 100644 blk/054 delete mode 100644 blk/056 delete mode 100644 blk/058 delete mode 100644 blk/060 delete mode 100644 blk/061 delete mode 100644 blk/062 delete mode 100644 blk/064 create mode 100644 doc/dict.txt diff --git a/blk/001 b/blk/001 index b516af9..41dc031 100644 --- a/blk/001 +++ b/blk/001 @@ -1,6 +1,6 @@ MASTER INDEX - 30 Dictionary 100 Block editor +100 Block editor 120 Visual Editor 150 Extra words 200 Z80 assembler 260 Cross compilation 280 Z80 boot code 350 Core words diff --git a/blk/030 b/blk/030 deleted file mode 100644 index 5abdfce..0000000 --- a/blk/030 +++ /dev/null @@ -1,12 +0,0 @@ -Dictionary - -List of words defined in Inner core (B390), Core words (B420) -and Extra words (B150). - -31 Glossary 34 Symbols -37 Entry management 40 Defining words -42 Flow 46 Parameter stack -48 Return stack 50 Memory -52 Addressed devices 54 Arithmetic / Bits -56 Logic 58 Strings -60 I/O 64 Disk diff --git a/blk/031 b/blk/031 deleted file mode 100644 index bb0149f..0000000 --- a/blk/031 +++ /dev/null @@ -1,16 +0,0 @@ -Glossary - -Stack notation: " -- ". Rightmost is -top of stack (TOS). For example, in "a b -- c d", b is TOS -before, d is TOS after. "R:" means that the Return Stack is -modified. "I:" prefix means "IMMEDIATE", that is, that this -stack transformation is made at compile time. - -Word references (wordref): When we say we have a "word -reference", it's a pointer to a word's *code link*. For example, -the address that "' DUP" puts on the stack is a wordref, that -is, a reference to the code link of the word DUP. - -PF: Parameter field. The area following the code link of a -word. For example, "' H@ 1+" points to the PF of the word H@. - (cont.) diff --git a/blk/032 b/blk/032 deleted file mode 100644 index e526d37..0000000 --- a/blk/032 +++ /dev/null @@ -1,9 +0,0 @@ -Atom: A word of the type compiledWord contains, in its PF, a -list of what we call "atoms". Those atoms are most of the time -word references, but they can also be references to NUMBER and -LIT. - -Words between "()" are "support words" that aren't really meant -to be used directly, but as part of another word. - -"*I*" in description indicates an IMMEDIATE word. diff --git a/blk/034 b/blk/034 deleted file mode 100644 index b35fd05..0000000 --- a/blk/034 +++ /dev/null @@ -1,16 +0,0 @@ -Symbols - -Throughout words, different symbols are used in different -contexts, but we try to been consistent in their use. Here's -their definitions: - -! - Store -@ - Fetch -$ - Initialize -^ - Arguments in their opposite order -< - Input -> - 1. Pointer in a buffer 2. Opposite of "<". -( - Lower boundary -) - Upper boundary -* - Word indirection (pointer to word) - (cont.) diff --git a/blk/035 b/blk/035 deleted file mode 100644 index 66c0e67..0000000 --- a/blk/035 +++ /dev/null @@ -1,3 +0,0 @@ -(cont.) -~ - Container for native code. Usually not an executable word. -? - Is it ...? (example: IMMED?) diff --git a/blk/037 b/blk/037 deleted file mode 100644 index 0e74fab..0000000 --- a/blk/037 +++ /dev/null @@ -1,16 +0,0 @@ -Entry management - -'? x -- a f Find x it in dict. If found, f=1 and - a = wordref. If not found, f=0 and - a = string addr. -' x -- a Push addr of word x to a. If not found, - aborts. -['] x -- *I* Like "'", but spits the addr as a number - literal. If not found, aborts. -, n -- Write n in HERE and advance it. -ALLOT n -- Move HERE by n bytes -C, b -- Write byte b in HERE and advance it. -FIND w -- a f Like '?, but for w. -EMPTY -- Rewind HERE and CURRENT where they were at - system initialization. - (cont.) diff --git a/blk/038 b/blk/038 deleted file mode 100644 index 3f4a99f..0000000 --- a/blk/038 +++ /dev/null @@ -1,5 +0,0 @@ -(cont.) -FORGET x -- Rewind the dictionary (both CURRENT and HERE) - up to x's previous entry. -PREV a -- a Return a wordref's previous entry. -WORD( a -- a Get wordref's beginning addr. diff --git a/blk/040 b/blk/040 deleted file mode 100644 index 982de5b..0000000 --- a/blk/040 +++ /dev/null @@ -1,15 +0,0 @@ -Defining words - -: x ... -- Define a new word -; R:I -- Exit a colon definition -CREATE x -- Create cell named x. Doesn't allocate a PF. -[COMPILE] x -- Compile word x and write it to HERE. - IMMEDIATE words are *not* executed. -COMPILE x -- Meta compiles. See B6. -CONSTANT x n -- Creates cell x that when called pushes its - value. -DOES> -- See B17. -IMMED? a -- f Checks whether wordref at a is immediate. -IMMEDIATE -- Flag the latest defined word as immediate. -LITN n -- Write number n as a literal. -VARIABLE c -- Creates cell x with 2 bytes allocation. diff --git a/blk/042 b/blk/042 deleted file mode 100644 index 45b0351..0000000 --- a/blk/042 +++ /dev/null @@ -1,16 +0,0 @@ -Flow - -Note that flow words can only be used in definitions. In the -INTERPRET loop, they don't have the desired effect because each -word from the input stream is executed immediately. In this -context, branching doesn't work. - -f IF A ELSE B THEN: if f is true, execute A, if false, execute -B. ELSE is optional. -[IF] .. [THEN]: Meta-IF. Works outside definitions. No [ELSE]. -BEGIN .. f UNTIL: if f is false, branch to BEGIN. -BEGIN .. AGAIN: Always branch to BEGIN. -x y DO .. LOOP: LOOP increments y. if y != x, branch to DO. - - - (cont.) diff --git a/blk/043 b/blk/043 deleted file mode 100644 index 60f3f7c..0000000 --- a/blk/043 +++ /dev/null @@ -1,16 +0,0 @@ -x CASE y OF A ENDOF z OF B ENDOF C ENDCASE: If x == y, execute -A, if x == z, execute B. Otherwise, execute C. x is dropped -in case of an OF match, *but it is kept if it reaches C*. You -have to consume it to avoid PSP leak. - -(br) -- Branches by the number specified in the 2 - following bytes. Can be negative. -(?br) f -- Branch if f is false. -( -- *I* Comment. Ignore input until ")" is read. -[ -- Begin interpretative mode. In a definition, - execute words instead of compiling them. -] -- End interpretative mode. -ABORT -- Resets PS and RS and returns to interpreter. -ABORT" x" -- *I* Compiles a ." followed by a ABORT. -ERR a -- Prints a and ABORT. Defined early and used by - drivers. (cont.) diff --git a/blk/044 b/blk/044 deleted file mode 100644 index ae2cdc6..0000000 --- a/blk/044 +++ /dev/null @@ -1,5 +0,0 @@ -EXECUTE a -- Execute wordref at addr a -INTERPRET -- Get a line from stdin, compile it in tmp memory, - then execute the compiled contents. -LEAVE -- In a DO..LOOP, exit at the next LOOP call. -QUIT -- Return to interpreter prompt immediately diff --git a/blk/046 b/blk/046 deleted file mode 100644 index 8903d97..0000000 --- a/blk/046 +++ /dev/null @@ -1,16 +0,0 @@ -Parameter Stack - -DROP a -- -DUP a -- a a -?DUP DUP if a is nonzero -NIP a b -- b -OVER a b -- a b a -ROT a b c -- b c a -SWAP a b -- b a -TUCK a b -- b a b -2DROP a a -- -2DUP a b -- a b a b -2OVER a b c d -- a b c d a b -2SWAP a b c d -- c d a b -'S Returns current stack pointer, not counting the - push it's making right now. (cont.) diff --git a/blk/047 b/blk/047 deleted file mode 100644 index e1c373d..0000000 --- a/blk/047 +++ /dev/null @@ -1,6 +0,0 @@ -S0 Returns address of PSP TOS. When PSP is empty, - 'S == S0 -PICK Pick nth item from stack. "0 PICK" = DUP, - "1 PICK" = OVER. -ROLL Rotate PSP over n items. "1 ROLL" = SWAP, - "2 ROLL" = ROT. 0 is noop. diff --git a/blk/048 b/blk/048 deleted file mode 100644 index 91f5d1d..0000000 --- a/blk/048 +++ /dev/null @@ -1,9 +0,0 @@ -Return Stack - ->R n -- R:n Pops PS and push to RS -2>R x y -- R:x y Equivalent to SWAP >R >R -R> R:n -- n Pops RS and push to PS -2R> R:x y -- x y Equivalent to R> R> SWAP -I -- n Copy RS TOS to PS -I' -- n Copy RS second item to PS -J -- n Copy RS third item to PS diff --git a/blk/050 b/blk/050 deleted file mode 100644 index 9845275..0000000 --- a/blk/050 +++ /dev/null @@ -1,16 +0,0 @@ -Memory - -@ a -- n Set n to value at address a -! n a -- Store n in address a -? a -- Print value of addr a -+! n a -- Increase value of addr a by n -BIT@ b a -- f Get bit b from addr a. -BIT! f b a -- Set bit b to f in addr a. -C@ a -- c Set c to byte at address a -C@+ a -- a+1 c Fetch c from a and inc a. -C@- a -- a-1 c Fetch c from a and dec a. -C! c a -- Store byte c in address a -C!+ c a -- a+1 Store byte c in a and inc a. -C!- c a -- a-1 Store byte c in a and dec a. -CURRENT -- a Set a to wordref of last added entry. - (cont.) diff --git a/blk/051 b/blk/051 deleted file mode 100644 index 28fbc0e..0000000 --- a/blk/051 +++ /dev/null @@ -1,10 +0,0 @@ -CURRENT* -- a A pointer to active CURRENT*. Useful - when we have multiple active dicts. -FILL a n b -- Fill n bytes at addr a with val b. -HERE -- a Push HERE's address -H@ -- a HERE @ -MOVE a1 a2 u -- Copy u bytes from a1 to a2, starting - with a1, going up. -MOVE- a1 a2 u -- Copy u bytes from a1 to a2, starting - with a1+u, going down. -MOVE, a u -- Copy u bytes from a to HERE. diff --git a/blk/052 b/blk/052 deleted file mode 100644 index d92bf82..0000000 --- a/blk/052 +++ /dev/null @@ -1,10 +0,0 @@ -Addressed devices - -See B14 for details. - -ADEV$ -- Initialize adev subsystem -A@ a -- c Indirect C@ -A! c a -- Indirect C! -A@* -- a Address for A@ word -A!* -- a Address for A! word -AMOVE src dst u -- Same as MOVE, but with A@ and A! diff --git a/blk/054 b/blk/054 deleted file mode 100644 index 9710035..0000000 --- a/blk/054 +++ /dev/null @@ -1,16 +0,0 @@ -Arithmetic / Bits - -+ a b -- c a + b -> c -- a b -- c a - b -> c --^ a b -- c b - a -> c -* a b -- c a * b -> c -/ a b -- c a / b -> c -MOD a b -- c a % b -> c -/MOD a b -- r q r:remainder q:quotient -AND a b -- c a & b -> c -OR a b -- c a | b -> c -XOR a b -- c a ^ b -> c -LSHIFT a u -- c a << u -> c -RSHIFT a u -- c a >> u -> c - -Shortcuts: 1+ 2+ 1- 2- diff --git a/blk/056 b/blk/056 deleted file mode 100644 index a26ff2d..0000000 --- a/blk/056 +++ /dev/null @@ -1,12 +0,0 @@ -Logic - -= n1 n2 -- f Push true if n1 == n2 -< n1 n2 -- f Push true if n1 < n2 -> n1 n2 -- f Push true if n1 > n2 ->< n l h -- f Push true if l < n < h -=><= n l h -- f Push true if l <= n <= h -CMP n1 n2 -- n Compare n1 and n2 and set n to -1, 0, or 1. - n=0: a1=a2. n=1: a1>a2. n=-1: a1 ffff - - - (cont.) diff --git a/blk/061 b/blk/061 deleted file mode 100644 index 3ef2a5e..0000000 --- a/blk/061 +++ /dev/null @@ -1,16 +0,0 @@ -," xxx" -- Write xxx to HERE -." xxx" -- *I* Compiles string literal xxx followed by a - call to (print). -C -- a Address of variable containing current pos in - input buffer. -KEY -- c Get char c from direct input -PC! c a -- Spit c to port a -PC@ a -- c Fetch c from port a - - (cont.) diff --git a/blk/062 b/blk/062 deleted file mode 100644 index 98ca8d5..0000000 --- a/blk/062 +++ /dev/null @@ -1,9 +0,0 @@ -WORD -- a Read one word from buffered input and push its - addr. Always null terminated. If ASCII EOT is - encountered, a will point to it (it is cons- - idered a word). -There are also ascii const emitters: -BS CR LF SPC CRLF -NL is an indirect word (see B80) that aliases to CRLF by -default and that should generally be used when we want to emit -a newline. diff --git a/blk/064 b/blk/064 deleted file mode 100644 index 462d935..0000000 --- a/blk/064 +++ /dev/null @@ -1,16 +0,0 @@ -Disk - -BLK> -- a Address of the current block variable. -BLK( -- a Beginning addr of blk buf. -BLK) -- a Ending addr of blk buf. -COPY s d -- Copy contents of s block to d block. -FLUSH -- Write current block to disk if dirty. -FREEBLKS? a b -- List free blocks between blocks a and b. -LIST n -- Prints the contents of the block n on screen - in the form of 16 lines of 64 columns. -LOAD n -- Interprets Forth code from block n -LOAD+ n -- Relative load. Loads active block + n. -LOADR n1 n2 -- Load block range between n1 and n2, inclusive. -LOADR+ n1 n2 -- Relative ranged load. -WIPE -- Empties current block -WIPED? -- f Whether current block is empty diff --git a/blk/150 b/blk/150 index 91dc1a7..b1dd6cd 100644 --- a/blk/150 +++ b/blk/150 @@ -6,8 +6,7 @@ disk blocks access running. The goal here is to minimize the binary size of a minimum Collapse OS install. Extra words are words you will most likely want because they -are generally useful. They are so useful that they are part -of the Dictionary (B30). +are generally useful. Some programs need them, so they will automatically LOAD them. Because more than one program can use the same extra words, diff --git a/cvm/vm.c b/cvm/vm.c index 430f1b2..a5b7d37 100644 --- a/cvm/vm.c +++ b/cvm/vm.c @@ -108,7 +108,7 @@ static void pushRS(word val) { } // The functions below directly map to native forth words defined in the -// dictionary (B30) +// dictionary (doc/dict.txt) static void execute(word wordref) { byte wtype = vm.mem[wordref]; if (wtype == 0) { // native diff --git a/doc/dict.txt b/doc/dict.txt new file mode 100644 index 0000000..cb2e6d1 --- /dev/null +++ b/doc/dict.txt @@ -0,0 +1,281 @@ +# Dictionary + +List of words defined in Inner core (B390), Core words (B420) +and Extra words (B150). + +# Glossary + +Stack notation: " -- ". Rightmost is +top of stack (TOS). For example, in "a b -- c d", b is TOS +before, d is TOS after. "R:" means that the Return Stack is +modified. "I:" prefix means "IMMEDIATE", that is, that this +stack transformation is made at compile time. + +Word references (wordref): When we say we have a "word +reference", it's a pointer to a word's *code link*. For example, +the address that "' DUP" puts on the stack is a wordref, that +is, a reference to the code link of the word DUP. + +PF: Parameter field. The area following the code link of a +word. For example, "' H@ 1+" points to the PF of the word H@. + +Atom: A word of the type compiledWord contains, in its PF, a +list of what we call "atoms". Those atoms are most of the time +word references, but they can also be references to NUMBER and +LIT. + +Words between "()" are "support words" that aren't really meant +to be used directly, but as part of another word. + +"*I*" in description indicates an IMMEDIATE word. + +# Symbols + +Throughout words, different symbols are used in different +contexts, but we try to been consistent in their use. Here's +their definitions: + +! - Store +@ - Fetch +$ - Initialize +^ - Arguments in their opposite order +< - Input +> - 1. Pointer in a buffer 2. Opposite of "<". +( - Lower boundary +) - Upper boundary +* - Word indirection (pointer to word) +? - Is it ...? (example: IMMED?) + +# Entry management + +'? x -- a f Find x it in dict. If found, f=1 and + a = wordref. If not found, f=0 and + a = string addr. +' x -- a Push addr of word x to a. If not found, + aborts. +['] x -- *I* Like "'", but spits the addr as a number + literal. If not found, aborts. +, n -- Write n in HERE and advance it. +ALLOT n -- Move HERE by n bytes +C, b -- Write byte b in HERE and advance it. +FIND w -- a f Like '?, but for w. +EMPTY -- Rewind HERE and CURRENT where they were at + system initialization. +FORGET x -- Rewind the dictionary (both CURRENT and HERE) + up to x's previous entry. +PREV a -- a Return a wordref's previous entry. +WORD( a -- a Get wordref's beginning addr. + +# Defining words + +: x ... -- Define a new word +; R:I -- Exit a colon definition +CREATE x -- Create cell named x. Doesn't allocate a PF. +[COMPILE] x -- Compile word x and write it to HERE. + IMMEDIATE words are *not* executed. +COMPILE x -- Meta compiles. See B6. +CONSTANT x n -- Creates cell x that when called pushes its + value. +DOES> -- See primer.txt +IMMED? a -- f Checks whether wordref at a is immediate. +IMMEDIATE -- Flag the latest defined word as immediate. +LITN n -- Write number n as a literal. +VARIABLE c -- Creates cell x with 2 bytes allocation. + +# Flow + +Note that flow words can only be used in definitions. In the +INTERPRET loop, they don't have the desired effect because each +word from the input stream is executed immediately. In this +context, branching doesn't work. + +f IF A ELSE B THEN: if f is true, execute A, if false, execute +B. ELSE is optional. +[IF] .. [THEN]: Meta-IF. Works outside definitions. No [ELSE]. +BEGIN .. f UNTIL: if f is false, branch to BEGIN. +BEGIN .. AGAIN: Always branch to BEGIN. +x y DO .. LOOP: LOOP increments y. if y != x, branch to DO. + +x CASE y OF A ENDOF z OF B ENDOF C ENDCASE: If x == y, execute +A, if x == z, execute B. Otherwise, execute C. x is dropped +in case of an OF match, *but it is kept if it reaches C*. You +have to consume it to avoid PSP leak. + +(br) -- Branches by the number specified in the 2 + following bytes. Can be negative. +(?br) f -- Branch if f is false. +( -- *I* Comment. Ignore input until ")" is read. +[ -- Begin interpretative mode. In a definition, + execute words instead of compiling them. +] -- End interpretative mode. +ABORT -- Resets PS and RS and returns to interpreter. +ABORT" x" -- *I* Compiles a ." followed by a ABORT. +ERR a -- Prints a and ABORT. Defined early and used by + drivers. +EXECUTE a -- Execute wordref at addr a +INTERPRET -- Get a line from stdin, compile it in tmp memory, + then execute the compiled contents. +LEAVE -- In a DO..LOOP, exit at the next LOOP call. +QUIT -- Return to interpreter prompt immediately + +# Parameter Stack + +DROP a -- +DUP a -- a a +?DUP DUP if a is nonzero +NIP a b -- b +OVER a b -- a b a +ROT a b c -- b c a +SWAP a b -- b a +TUCK a b -- b a b +2DROP a a -- +2DUP a b -- a b a b +2OVER a b c d -- a b c d a b +2SWAP a b c d -- c d a b +'S Returns current stack pointer, not counting the + push it's making right now. +S0 Returns address of PSP TOS. When PSP is empty, + 'S == S0 +PICK Pick nth item from stack. "0 PICK" = DUP, + "1 PICK" = OVER. +ROLL Rotate PSP over n items. "1 ROLL" = SWAP, + "2 ROLL" = ROT. 0 is noop. + +# Return Stack + +>R n -- R:n Pops PS and push to RS +2>R x y -- R:x y Equivalent to SWAP >R >R +R> R:n -- n Pops RS and push to PS +2R> R:x y -- x y Equivalent to R> R> SWAP +I -- n Copy RS TOS to PS +I' -- n Copy RS second item to PS +J -- n Copy RS third item to PS + +# Memory + +@ a -- n Set n to value at address a +! n a -- Store n in address a +? a -- Print value of addr a ++! n a -- Increase value of addr a by n +BIT@ b a -- f Get bit b from addr a. +BIT! f b a -- Set bit b to f in addr a. +C@ a -- c Set c to byte at address a +C@+ a -- a+1 c Fetch c from a and inc a. +C@- a -- a-1 c Fetch c from a and dec a. +C! c a -- Store byte c in address a +C!+ c a -- a+1 Store byte c in a and inc a. +C!- c a -- a-1 Store byte c in a and dec a. +CURRENT -- a Set a to wordref of last added entry. +CURRENT* -- a A pointer to active CURRENT*. Useful + when we have multiple active dicts. +FILL a n b -- Fill n bytes at addr a with val b. +HERE -- a Push HERE's address +H@ -- a HERE @ +MOVE a1 a2 u -- Copy u bytes from a1 to a2, starting + with a1, going up. +MOVE- a1 a2 u -- Copy u bytes from a1 to a2, starting + with a1+u, going down. +MOVE, a u -- Copy u bytes from a to HERE. + +# Addressed devices + +ADEV$ -- Initialize adev subsystem +A@ a -- c Indirect C@ +A! c a -- Indirect C! +A@* -- a Address for A@ word +A!* -- a Address for A! word +AMOVE src dst u -- Same as MOVE, but with A@ and A! + +# Arithmetic / Bits + ++ a b -- c a + b -> c +- a b -- c a - b -> c +-^ a b -- c b - a -> c +* a b -- c a * b -> c +/ a b -- c a / b -> c +MOD a b -- c a % b -> c +/MOD a b -- r q r:remainder q:quotient +AND a b -- c a & b -> c +OR a b -- c a | b -> c +XOR a b -- c a ^ b -> c +LSHIFT a u -- c a << u -> c +RSHIFT a u -- c a >> u -> c + +Shortcuts: 1+ 2+ 1- 2- + +# Logic + += n1 n2 -- f Push true if n1 == n2 +< n1 n2 -- f Push true if n1 < n2 +> n1 n2 -- f Push true if n1 > n2 +>< n l h -- f Push true if l < n < h +=><= n l h -- f Push true if l <= n <= h +CMP n1 n2 -- n Compare n1 and n2 and set n to -1, 0, or 1. + n=0: a1=a2. n=1: a1>a2. n=-1: a1 ffff +," xxx" -- Write xxx to HERE +." xxx" -- *I* Compiles string literal xxx followed by a + call to (print). +C -- a Address of variable containing current pos in + input buffer. +KEY -- c Get char c from direct input +PC! c a -- Spit c to port a +PC@ a -- c Fetch c from port a +WORD -- a Read one word from buffered input and push its + addr. Always null terminated. If ASCII EOT is + encountered, a will point to it (it is cons- + idered a word). + +There are also ascii const emitters: +BS CR LF SPC CRLF + +NL is an indirect word (see SYSVARS in impl.txt) that aliases to +CRLF by default and that should generally be used when we want +to emit a newline. + +# Disk + +BLK> -- a Address of the current block variable. +BLK( -- a Beginning addr of blk buf. +BLK) -- a Ending addr of blk buf. +COPY s d -- Copy contents of s block to d block. +FLUSH -- Write current block to disk if dirty. +FREEBLKS? a b -- List free blocks between blocks a and b. +LIST n -- Prints the contents of the block n on screen + in the form of 16 lines of 64 columns. +LOAD n -- Interprets Forth code from block n +LOAD+ n -- Relative load. Loads active block + n. +LOADR n1 n2 -- Load block range between n1 and n2, inclusive. +LOADR+ n1 n2 -- Relative ranged load. +WIPE -- Empties current block +WIPED? -- f Whether current block is empty diff --git a/doc/primer.txt b/doc/primer.txt index a0d555e..4601923 100644 --- a/doc/primer.txt +++ b/doc/primer.txt @@ -51,8 +51,9 @@ words (if your system has glyphs for them). # Dictionary Forth's dictionary link words to code. On boot, this dictionary -contains the system's words (look in B30 for a list of them), -but you can define new words with the ":" word. For example: +contains the system's words (look in dict.txt for a list of +them), but you can define new words with the ":" word. For +example: : FOO 42 . ; @@ -245,5 +246,5 @@ their "power" come from the fact that they're immediate. Starting Forth by Leo Brodie explain all of this in details. Read this if you can. If you can't, well, let this sink in for -a while, browse the dictionary (B30) and try to understand why -this or that word is immediate. Good luck! +a while, browse the dictionary (dict.txt) and try to understand +why this or that word is immediate. Good luck!