collapseos/blk/308

CODE ROT ( a b c -- b c a )
    HL POP, ( C ) DE POP, ( B ) IY POP, ( A ) chkPS,
    DE PUSH, ( B ) HL PUSH, ( C ) IY PUSH, ( A )
;CODE
CODE ROT> ( a b c -- c a b )
    HL POP, ( C ) DE POP, ( B ) IY POP, ( A ) chkPS,
    HL PUSH, ( C ) IY PUSH, ( A ) DE PUSH, ( B )
;CODE
CODE DUP ( a -- a a )
    HL POP, chkPS,
    HL PUSH, HL PUSH,
;CODE
CODE ?DUP
    HL POP, chkPS, HL PUSH,
    HLZ, IFNZ, HL PUSH, THEN,
;CODE
Extract (n) code from stable ABI 2020-07-05 14:13:01 -04:00			`CODE ROT ( a b c -- b c a )`
z80: Use BC as IP register instead of IY It's a bit more inconvenient in terms of register protection (BC is much more generally useful than IY), but it makes tight spots such as next and execute much faster, so I think it's worth it. 2020-07-06 23:31:00 -04:00			`HL POP, ( C ) DE POP, ( B ) IY POP, ( A ) chkPS,`
			`DE PUSH, ( B ) HL PUSH, ( C ) IY PUSH, ( A )`
Extract (n) code from stable ABI 2020-07-05 14:13:01 -04:00			`;CODE`
Add word ROT> There are many situations where it can be useful. Worth it. 2020-10-29 12:34:02 -04:00			`CODE ROT> ( a b c -- c a b )`
			`HL POP, ( C ) DE POP, ( B ) IY POP, ( A ) chkPS,`
			`HL PUSH, ( C ) IY PUSH, ( A ) DE PUSH, ( B )`
			`;CODE`
Extract (n) code from stable ABI 2020-07-05 14:13:01 -04:00			`CODE DUP ( a -- a a )`
			`HL POP, chkPS,`
			`HL PUSH, HL PUSH,`
			`;CODE`
			`CODE ?DUP`
Add word ROT> There are many situations where it can be useful. Worth it. 2020-10-29 12:34:02 -04:00			`HL POP, chkPS, HL PUSH,`
Extract (n) code from stable ABI 2020-07-05 14:13:01 -04:00			`HLZ, IFNZ, HL PUSH, THEN,`
			`;CODE`