forth: Forth-ify "ABORT"

This commit is contained in:
Virgil Dupras 2020-03-28 10:11:52 -04:00
parent 8d8e1d93da
commit e0eaa8ba63
5 changed files with 41 additions and 28 deletions

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@ -117,10 +117,12 @@ JUMPTBL:
jp nativeWord
jp next
jp chkPS
; 24
NUMBER:
.dw numberWord
LIT:
.dw litWord
.dw INITIAL_SP
; *** Code ***
forthMain:
@ -130,7 +132,7 @@ forthMain:
; ourselves a nice 6 bytes buffer. 6 bytes because we seldom have words
; requiring more than 3 items from the stack. Then, at each "exit" call
; we check for stack underflow.
push af \ push af \ push af
ld sp, 0xfffa
ld (INITIAL_SP), sp
ld ix, RS_ADDR
; LATEST is a label to the latest entry of the dict. This can be
@ -185,7 +187,7 @@ INTERPRET:
.dw DROP
.dw EXECUTE
.fill 43
.fill 41
; *** Collapse OS lib copy ***
; In the process of Forth-ifying Collapse OS, apps will be slowly rewritten to
@ -650,20 +652,6 @@ QUIT:
ld ix, RS_ADDR
jp next
.db "ABORT"
.dw $-QUIT
.db 5
ABORT:
.dw compiledWord
.dw .private
.dw QUIT
.private:
.dw nativeWord
; Reinitialize PS
ld sp, (INITIAL_SP)
jp next
abortUnderflow:
ld hl, .name
call find
@ -672,10 +660,10 @@ abortUnderflow:
.name:
.db "(uflw)", 0
.fill 18
.fill 41
.db "BYE"
.dw $-ABORT
.dw $-QUIT
.db 3
BYE:
.dw nativeWord

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@ -49,6 +49,8 @@
, ( write! )
; IMMEDIATE
: ABORT _c (resSP) QUIT ;
: INTERPRET
BEGIN
WORD
@ -71,7 +73,7 @@
( This is only the "early parser" in earlier stages. No need
for an abort message )
: (parse)
(parsed) SKIP? ABORT
(parsed) SKIP? _c ABORT
;
( a -- )
@ -87,7 +89,7 @@
;
: (uflw)
LIT< stack-underflow _c (print) ABORT
LIT< stack-underflow _c (print) _c ABORT
;
: C,

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@ -32,6 +32,9 @@
: IY+ _iy+- ;
: IY- 0 -^ _iy+- ;
: <<3 8 * ;
: <<4 16 * ;
( -- )
: OP1 CREATE C, DOES> C@ A, ;
0x76 OP1 HALT,
@ -48,7 +51,7 @@
DOES>
C@ ( r op )
SWAP ( op r )
8 * ( op r<<3 )
<<3 ( op r<<3 )
OR A,
;
0x04 OP1r INCr,
@ -72,7 +75,7 @@
DOES>
C@ ( qq op )
SWAP ( op qq )
16 * ( op qq<<4 )
<<4 ( op qq<<4 )
OR A,
;
0xc5 OP1qq PUSHqq,
@ -84,7 +87,7 @@
: _1rr
C@ ( rd rr op )
ROT ( rr op rd )
8 * ( rr op rd<<3 )
<<3 ( rr op rd<<3 )
OR OR A,
;
@ -125,7 +128,7 @@
DOES>
C@ ( r n op )
ROT ( n op r )
8 * ( n op r<<3 )
<<3 ( n op r<<3 )
OR A, A,
;
0x06 OP2rn LDrn,
@ -137,7 +140,7 @@
0xcb A,
C@ ( b r op )
ROT ( r op b )
8 * ( r op b<<3 )
<<3 ( r op b<<3 )
OR OR A,
;
0xc0 OP2br SETbr,
@ -167,7 +170,7 @@
DOES>
@ SPLITB SWAP ( r lsb msb )
A, ( r lsb )
SWAP 8 * ( lsb r<<3 )
SWAP <<3 ( lsb r<<3 )
OR A,
;
0xed41 OP2r OUT(C)r,
@ -179,7 +182,7 @@
DOES>
0xed A,
C@ SWAP ( op ss )
16 * ( op ss<< 4 )
<<4 ( op ss<< 4 )
OR A,
;
0x4a OP2ss ADCHLss,
@ -191,7 +194,7 @@
DOES>
C@ ( dd nn op )
ROT ( nn op dd )
16 * ( nn op dd<<4 )
<<4 ( nn op dd<<4 )
OR A,
SPLITB A, A,
;
@ -222,6 +225,21 @@
0x10 OPJR DJNZe,
( Specials )
( dd nn -- )
: LDdd(nn),
0xed A,
SWAP <<4 0x4b OR A,
SPLITB A, A,
;
( nn dd -- )
: LD(nn)dd,
0xed A,
<<4 0x43 OR A,
SPLITB A, A,
;
( JTBL+18 == next )
: JPNEXT, [ JTBL 18 + LITN ] JPnn, ;

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@ -245,3 +245,8 @@ CODE IMMED?
( notset )
DE PUSHqq,
;CODE
CODE (resSP)
( INITIAL_SP == JTBL+28 )
SP JTBL 28 + @ LDdd(nn),
;CODE