[Coco] Desired RESET behavior

[Darren A]

On Sat, Jan 30, 2016 at 10:44 PM, RETRO Innovations wrote:

Specifically, given an opcode like:
>
> sta $ff5b
>
> from the time the E clock goes low (marking the end of the current store
> instruction), what is the shortest amount of cycles needed to again access
> $ff5b?



The fastest you can write again to the same address is 3 cycles when using
a 6309.

With direct page addressing ($FF in DP):
sta   <$ff5b
stb   <$ff5b

With a TFM instruction:
ldy  #$ff5b
ldw #nnnn
tfm   x+,y


- Darren