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collapseos/blk/307
Virgil Dupras e4a4a9800d 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

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CODE (s) ( string literal )
PC ORG @ 0x2d + ! ( stable ABI JP )
( Like (n) but instead of being followed by a 2 bytes
number, it's followed by a string. When called, puts the
string's address on PS )
BC PUSH,
LDA(BC), C ADDr,
IFC, B INCr, THEN,
C A LDrr,
BC INCd,
;CODE