6502
/
foco65
mirror of https://github.com/piotr-wiszowaty/foco65.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Add words: 2dup 2swap 2drop

This commit is contained in:
Piotr Wiszowaty 2014-08-24 22:54:12 +02:00
parent c892085cd6
commit 60f879b810
1 changed files with 44 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
foco65
View File

@ -1469,6 +1469,50 @@ d_equ_f
jmp next
[end-code] ;
: 2drop
[label] two_drop
[code]
inx
inx
inx
inx
jmp next
[end-code] ;
: 2dup
[label] two_dup
[code]
lda pstack+3,x
dex
sta pstack,x
lda pstack+3,x
dex
sta pstack,x
lda pstack+3,x
dex
sta pstack,x
lda pstack+3,x
dex
sta pstack,x
jmp next
[end-code] ;
: 2swap
[label] two_stap
[code]
ldy pstack+3,x
lda pstack+1,x
sta pstack+3,x
tya
sta pstack+1,x
ldy pstack+2,x
lda pstack+0,x
sta pstack+2,x
tya
sta pstack+0,x
jmp next
[end-code] ;
: sp
[code]
txa