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| \ MakeKernel 22feb99jaw |
\ MakeKernel 22feb99jaw |
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|
| : makekernel ( targetsize -- ) |
: makekernel ( start targetsize -- ) |
| \G convenience word to setup the memory of the target |
\G convenience word to setup the memory of the target |
| \G used by main.fs of the c-engine based systems |
\G used by main.fs of the c-engine based systems |
| 100 swap dictionary (region) |
dictionary (region) setup-target ; |
| setup-target ; |
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| >MINIMAL |
>MINIMAL |
| : makekernel makekernel ; |
: makekernel makekernel ; |
| s" kernel.tags" r/w create-file throw value vi-tag-file-id |
s" kernel.tags" r/w create-file throw value vi-tag-file-id |
| \ contains the file-id of the tags file |
\ contains the file-id of the tags file |
| |
|
| Create tag-beg 2 c, 7F c, bl c, |
Create tag-beg 1 c, 7F c, |
| Create tag-end 2 c, bl c, 01 c, |
Create tag-end 1 c, 01 c, |
| Create tag-bof 1 c, 0C c, |
Create tag-bof 1 c, 0C c, |
| Create tag-tab 1 c, 09 c, |
Create tag-tab 1 c, 09 c, |
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| Variable prim# |
Variable prim# |
| : first-primitive ( n -- ) prim# ! ; |
: first-primitive ( n -- ) prim# ! ; |
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: group 0 word drop prim# @ 1- -$200 and prim# ! ; |
| : Primitive ( -- ) \ name |
: Primitive ( -- ) \ name |
| >in @ skip? IF drop EXIT THEN >in ! |
>in @ skip? IF drop EXIT THEN >in ! |
| s" prims" T $has? H 0= |
s" prims" T $has? H 0= |
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|
| Defer instant-interpret-does>-hook |
Defer instant-interpret-does>-hook |
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T has? peephole H [IF] |
| : does-resolved ( ghost -- ) |
: does-resolved ( ghost -- ) |
| compile does-exec g>xt T a, H ; |
compile does-exec g>xt T a, H ; |
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[ELSE] |
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: does-resolved ( ghost -- ) |
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g>xt T a, H ; |
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[THEN] |
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| : resolve-does>-part ( -- ) |
: resolve-does>-part ( -- ) |
| \ resolve words made by builders |
\ resolve words made by builders |
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|
| : >mark ( -- sys ) T here ( dup ." M" hex. ) 0 , H ; |
: >mark ( -- sys ) T here ( dup ." M" hex. ) 0 , H ; |
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X has? abranch [IF] |
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: branchoffset ( src dest -- ) drop ; |
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: offset, ( n -- ) X A, ; |
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[ELSE] |
| : branchoffset ( src dest -- ) - tchar / ; \ ?? jaw |
: branchoffset ( src dest -- ) - tchar / ; \ ?? jaw |
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: offset, ( n -- ) X , ; |
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[THEN] |
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| :noname compile branch X here branchoffset X , ; |
:noname compile branch X here branchoffset offset, ; |
| IS branch, ( target-addr -- ) |
IS branch, ( target-addr -- ) |
| :noname compile ?branch X here branchoffset X , ; |
:noname compile ?branch X here branchoffset offset, ; |
| IS ?branch, ( target-addr -- ) |
IS ?branch, ( target-addr -- ) |
| :noname compile branch T here 0 , H ; |
:noname compile branch T here 0 H offset, ; |
| IS branchmark, ( -- branchtoken ) |
IS branchmark, ( -- branchtoken ) |
| :noname compile ?branch T here 0 , H ; |
:noname compile ?branch T here 0 H offset, ; |
| IS ?branchmark, ( -- branchtoken ) |
IS ?branchmark, ( -- branchtoken ) |
| :noname T here 0 , H ; |
:noname T here 0 H offset, ; |
| IS ?domark, ( -- branchtoken ) |
IS ?domark, ( -- branchtoken ) |
| :noname dup X @ ?struc X here over branchoffset swap X ! ; |
:noname dup X @ ?struc X here over branchoffset swap X ! ; |
| IS branchtoresolve, ( branchtoken -- ) |
IS branchtoresolve, ( branchtoken -- ) |
| |
|
| : loop] ( target-addr -- ) |
: loop] ( target-addr -- ) |
| branchto, |
branchto, |
| dup X here branchoffset X , |
dup X here branchoffset offset, |
| tcell - (done) ; |
tcell - (done) ; |
| |
|
| : skiploop] ?dup IF branchto, branchtoresolve, THEN ; |
: skiploop] ?dup IF branchto, branchtoresolve, THEN ; |
| Cond: +LOOP 1 ncontrols? +loop, ;Cond |
Cond: +LOOP 1 ncontrols? +loop, ;Cond |
| Cond: NEXT 1 ncontrols? next, ;Cond |
Cond: NEXT 1 ncontrols? next, ;Cond |
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|
| \ Absoulte branches 26sep02jaw |
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| \ This section defined different semantics for |
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| \ conditionals, using and compiling absolute branches |
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| X has? abranch [IF] |
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| Ghost abranch drop |
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| Ghost a?branch drop |
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| Ghost a(?do) drop |
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| Ghost a(do) drop |
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| Ghost a(next) drop |
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| Ghost a(+loop) drop |
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| Ghost a(loop) drop |
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| :noname compile abranch X a, ; plugin-of branch, |
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| :noname compile a?branch X a, ; plugin-of ?branch, |
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| :noname compile abranch T here 0 a, H ; plugin-of branchmark, |
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| :noname compile a?branch T here 0 a, H ; plugin-of ?branchmark, |
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| :noname |
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| dup X @ ABORT" CROSS: branch already resolved" |
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| X here swap X a! ; plugin-of branchtoresolve, |
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| :noname |
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| 0 compile a(?do) ?domark, (leave) |
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| branchtomark, 2 to1 ; plugin-of ?do, |
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| : aloop] ( target-addr -- ) |
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| branchto, |
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| dup X a, |
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| tcell - (done) ; |
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| :noname |
|
| 1to compile a(loop) aloop] |
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| compile unloop skiploop] ; plugin-of loop, |
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| :noname |
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| 1to compile a(+loop) aloop] |
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| compile unloop skiploop] ; plugin-of +loop, |
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| :noname |
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| compile a(next) aloop] compile unloop ; plugin-of next, |
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| [THEN] |
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| \ String words 23feb93py |
\ String words 23feb93py |
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|
| : ," [char] " parse ht-string, X align ; |
: ," [char] " parse ht-string, X align ; |
| hex |
hex |
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|
| >CROSS |
>CROSS |
| Create magic s" Gforth2x" here over allot swap move |
Create magic s" Gforth3x" here over allot swap move |
| |
|
| bigendian 1+ \ strangely, in magic big=0, little=1 |
bigendian 1+ \ strangely, in magic big=0, little=1 |
| tcell 1 = 0 and or |
tcell 1 = 0 and or |
| : bye bye ; |
: bye bye ; |
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| \ dummy |
\ dummy |
| : group 0 word drop ; |
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| \ turnkey direction |
\ turnkey direction |
| : H forth ; immediate |
: H forth ; immediate |
