[Coco] Direct page register question

[Zippster]

I prefer to just use the ‘<‘.  It doesn’t hurt to be explicit after all here.
Also if you’re using a label, it makes it more obvious (to me at least)
that direct addressing is being used.

But whatever the programmer is more comfortable with of course.

- Ed

> On Oct 30, 2018, at 3:10 PM, Ciaran Anscomb <cocomalt at 6809.org.uk> wrote:
> 
> William Astle wrote:
>>       LDA SYMBOL
>> SYMBOL EQU $85
>> 
>> This will probably use extended addressing because during pass one, the
>> assembler hasn't seen the definition of SYMBOL yet when it gets to the
>> LDA instruction so it has to assume full 16 bit addressing.
>> 
>> [...]
>> 
>> This is actually one of the reasons you should define your variables at
>> the start of the program, especially if the direct page is going to be
>> used.
> 
> Or use an n-pass assembler which generates another pass if addressing
> isn't stable!  Native assemblers likely going to be limited, but a
> cross-assembler might do it.  e.g., asm6809 output:
> 
> 4000                          org $4000
> 4000                          setdp $00
> 4000  9685                    lda symbol
> 0085                  symbol  equ $85
> 
> (*parp*)
> 
> ..ciaran
> 
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