VolksForth/sources/Apple1/2words.fth
Carsten Strotmann 91dfad1112 Apple 1 sources
2020-08-25 18:55:03 +02:00

69 lines
4.2 KiB
Forth

\ *** Block No. 0 Hexblock 0
\ Additional definitions for 32bit values cas 26jan06
\ *** Block No. 1 Hexblock 1
\ 2Words Loadscreen cas 26jan06
hex
&2 &3 thru
decimal
\ *** Block No. 2 Hexblock 2
\ 2! 2@ 2VARIABLE 2CONSTANT 08JUL85RE)
CODE 2! ( D ADR --)
TYA SETUP JSR 3 # LDY
[[ SP )Y LDA N )Y STA DEY 0< ?]
1 # LDY POPTWO JMP END-CODE
CODE 2@ ( ADR -- D)
SP X) LDA N STA SP )Y LDA N 1+ STA
SP 2DEC 3 # LDY
[[ N )Y LDA SP )Y STA DEY 0< ?]
XYNEXT JMP END-CODE
\ *** Block No. 3 Hexblock 3
\
: 2VARIABLE ( --) CREATE 4 ALLOT ;
( -- ADR)
: 2CONSTANT ( D --) CREATE , , DOES> ( -- D) 2@ ;
\ 2DUP EXISTS
\ 2SWAP EXISTS
\ 2DROP EXISTS