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collapseos/blk/263

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z80: fix tricky memory initialization issue Among random "better safe than sorry" changes, the real fix is in changing "4" for "5" above _find declaration. This off-by-one error had that word, which is the root word in z80, have a 0x01 prev field instead of a 0x00 one. When all memory was initialized to zero, it didn't matter, we ended up hitting 0 prev and considered ourselves properly at the end of dict. When memory wasn't initialized, however, we would end up jumping at all kinds of places, leading to random behavior.
2020-08-16 06:37:58 +10:00
CREATE XCURRENT 0 ,
De-stabilize (br), (?br), (loop), (s) When writing the xcomp documentation, I realized that with careful threading and by accepting a bit of code duplication in the xcomp toolset, I could de-stabilize a couple of words. (n) and EXIT are a bit trickier, but I think it can be done. It would be nice to get rid of stable wordrefs...
2020-09-20 03:54:01 +10:00
: XCON XCURRENT CURRENT* ! ; : XCOFF 0x02 RAM+ CURRENT* ! ;
: (xentry) XCON (entry) XCOFF ; : XCREATE (xentry) 2 C, ;
: XCODE XCON CODE XCOFF ; : XIMM XCON IMMEDIATE XCOFF ;
xcomp: add XCOMPILE and X[COMPILE] This allows us to move words like ABORT" to xcomp-core, which is I think the last roadblock before being able to unify all drivers into a single xcomp layer.
2020-05-13 11:08:18 +10:00
: _xapply ( a -- a-off )
DUP ORG @ > IF ORG @ - BIN( @ + THEN ;
De-stabilize (br), (?br), (loop), (s) When writing the xcomp documentation, I realized that with careful threading and by accepting a bit of code duplication in the xcomp toolset, I could de-stabilize a couple of words. (n) and EXIT are a bit trickier, but I think it can be done. It would be nice to get rid of stable wordrefs...
2020-09-20 03:54:01 +10:00
: XFIND XCURRENT @ SWAP _find DROP _xapply ;
: X' XCON ' XCOFF ; : X['] XCON ' _xapply LITN XCOFF ;
: XCOMPILE XCON ' _xapply LITN
Rename (find) to FIND I hadn't noticed that this word was almost ANS compliant.
2020-05-16 02:50:14 +10:00
LIT< , FIND DROP _xapply , XCOFF ;
xcomp: add XCOMPILE and X[COMPILE] This allows us to move words like ABORT" to xcomp-core, which is I think the last roadblock before being able to unify all drivers into a single xcomp layer.
2020-05-13 11:08:18 +10:00
: X[COMPILE] XCON ' _xapply , XCOFF ;
De-stabilize (br), (?br), (loop), (s) When writing the xcomp documentation, I realized that with careful threading and by accepting a bit of code duplication in the xcomp toolset, I could de-stabilize a couple of words. (n) and EXIT are a bit trickier, but I think it can be done. It would be nice to get rid of stable wordrefs...
2020-09-20 03:54:01 +10:00
: XDO LIT< 2>R XFIND , H@ ;
: XLOOP LIT< (loop) XFIND , H@ - C, ;
: XIF LIT< (?br) XFIND , H@ 1 ALLOT ;
: XELSE LIT< (br) XFIND , 1 ALLOT [COMPILE] THEN H@ 1- ;
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