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Author SHA1 Message Date
Virgil Dupras
06a4674317 ti84: implement a-lock
There's a bug where the first char after a-lock isn't a-modded. I
have troubles figuring it out for now. It feels like deja vu. I
think I had the same problem with asm.
2020-05-10 09:37:36 -04:00
Virgil Dupras
a476773813 Add words BIT@ and BIT! 2020-05-10 08:40:49 -04:00
7 changed files with 26 additions and 11 deletions

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@ -4,6 +4,8 @@ Memory
! 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.
@ -11,6 +13,4 @@ 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.
(cont.)

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@ -1,3 +1,5 @@
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 @

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blk/404
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@ -4,9 +4,11 @@
DUP NOT IF DROP 0x0c RAM+ @ THEN ( 0c == C<* )
EXECUTE
;
: , HERE @ ! HERE @ 2+ HERE ! ;
: C, HERE @ C! HERE @ 1+ HERE ! ;
: BIT@ ( bit addr -- f ) C@ SWAP RSHIFT 0x01 AND ;
: BIT! ( f bit addr -- )
SWAP 0x01 SWAP LSHIFT ROT ( addr mask f )
IF OVER C@ OR
ELSE 0xff XOR OVER C@ AND THEN ( addr flg )
SWAP C! ;

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@ -7,3 +7,7 @@ CREATE _atbl
0x20 C, 'Y' C, 'T' C, 'O' C, 'J' C, 'E' C, 'B' C, 0 C,
0 C, 'X' C, 'S' C, 'N' C, 'I' C, 'D' C, 'A' C, 0x80 C,
0 C, 0 C, 0 C, 0 C, 0 C, 0x81 ( 2nd ) C, 0 C, 0x7f C,
: _2nd@ 0 [ KBD_MEM LITN ] BIT@ ;
: _2nd! 0 [ KBD_MEM LITN ] BIT! ;
: _alock@ 1 [ KBD_MEM LITN ] BIT@ ;
: _alock^ _alock@ NOT 1 [ KBD_MEM LITN ] BIT! ;

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blk/570
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@ -1,6 +1,12 @@
: _tbl^ ( swap input tbl )
_atbl = IF _dtbl ELSE _atbl THEN ;
: (key)
_dtbl 0 ( dummy ) BEGIN ( tbl 0 )
DROP DUP ( tbl ) _gti + C@
DUP 0x80 = IF ( alpha ) 2DROP _atbl 0 THEN
DUP UNTIL ( tbl c -- loop if null ) SWAP DROP
0 _2nd! 0 ( lastchr ) BEGIN
_alock@ IF _atbl ELSE _dtbl THEN
OVER 0x80 ( alpha ) =
IF _tbl^ _2nd@ IF _alock^ THEN THEN
SWAP 0x81 = _2nd!
_gti + C@
DUP 0 0x80 >< UNTIL ( loop if not in range )
_wait ;
: KBD$ 0 [ KBD_MEM LITN ] C! ;

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@ -1,6 +1,7 @@
0x8000 CONSTANT RAMSTART
0xb000 CONSTANT RS_ADDR
RAMSTART 0x70 + CONSTANT LCD_MEM
RAMSTART 0x72 + CONSTANT KBD_MEM
0x01 CONSTANT KBD_PORT
212 LOAD ( z80 assembler )
262 LOAD ( xcomp )
@ -25,6 +26,6 @@ PC ORG @ 8 + !
422 437 XPACKR ( core )
558 560 XPACKR ( LCD high )
438 451 XPACKR ( print fmt readln )
," : _ LCD$ (ok) RDLN$ ; _ "
," : _ LCD$ KBD$ (ok) RDLN$ ; _ "
ORG @ 256 /MOD 2 PC! 2 PC!
H@ 256 /MOD 2 PC! 2 PC!