mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-30 21:58:05 +11:00
17 lines
543 B
Plaintext
17 lines
543 B
Plaintext
|
( Splits word into msb/lsb, lsb being on TOS )
|
||
|
|
: SPLITB
|
||
|
|
256 /MOD SWAP
|
||
|
|
;
|
||
|
|
: PC H@ ORG @ - ;
|
||
|
|
( A, spits an assembled byte, A,, spits an assembled word
|
||
|
|
Both increase PC. To debug, change C, to .X )
|
||
|
|
: A, C, ; : A,, SPLITB A, A, ;
|
||
|
|
: <<3 8 * ; : <<4 16 * ;
|
||
|
|
( As a general rule, IX and IY are equivalent to spitting an
|
||
|
|
extra 0xdd / 0xfd and then spit the equivalent of HL )
|
||
|
|
: IX 0xdd A, HL ; : IY 0xfd A, HL ;
|
||
|
|
: _ix+- 0xff AND 0xdd A, (HL) ;
|
||
|
|
: _iy+- 0xff AND 0xfd A, (HL) ;
|
||
|
|
: IX+ _ix+- ; : IX- 0 -^ _ix+- ;
|
||
|
|
: IY+ _iy+- ; : IY- 0 -^ _iy+- ;
|