From: Anders Carlsson (anders.carlsson_at_sfks.se)
Date: 2008-10-17 14:28:55
Spiro Trikaliotis wrote:
> Using "<" for the lower part and ">" for the higher part seems ubiquitous
> for me, but not without the hash sign.
On the other hand those operators almost make the # implied. I can only find
two possible meanings of this instruction:
LDA <$FFD2
1. Load #$D2 to the accumulator
2. Load the memory contents at zeropage position $D2
In particular when used with symbolic labels, the latter use would be really
cryptic:
LDA <LABEL = Load what is on the zeropage location corresponding to the low
byte of the address to LABEL. I'm trying to come up with a situation where
that would be useful.
Can the 65816 load 16-bit values to the accumulator as well as 8-bit values?
If so, when using 24-bit labels you may need five different operators:
< = low 8-bits of any address
> = high 8-bits of any address
| = middle 8-bits of a 24-bit address
<< = low 16-bits of a 24-bit address
>> = high 16-bits of a 24-bit address
Add to that the operator to speficy if a given address should be stored as
8, 16 or 24 bits when it can't be determined.
Best regards
--
Anders Carlsson
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