Hi All,

Does anyone know whether the cycle counts for the NXP 68000 differ from those of the original Motorola 68000?

Whilst the current NXP manual appears to list different times for byte and word-size instructions, older sources tend to list them as equal.

TBH, few online sources agree 100%, and the NXP manual has just added yet another layout of complexity.

As I'm slowly losing my mind, any advice would be gratefully received.

That's ok. Flashing an Image is no big deal, especially since you implemented the auto-resize feature.

so 4000 no longer means boxed... it's but an accelerator

Huh?

No the the A4000NG is its own product like 600GS.
A1200NG trapdoor board is the "accelerator".

Ok, for 600GS. There is one caveat.
You will need to flash a fresh updated image, as trying to update boot loader to update things needed doesn't work.

USA