RTFM!
GRAB sets the memory limit to #B400, so you can't do HIMEM#B400 but 1 byte less is OK (i.e. #B3FF).
Honestly, here the HIMEM command just after GRAB is bit 'overengineered' .
RTFM!
Here you will find the 8D I/O usage.
Indeed! #Oric is full with bad HW design examples and the worst one is to leave the CPU buses unbuffered and open to this cruel worldSodiumlightbaby wrote: ↑Sun Mar 03, 2024 10:37 pm So today I learned - don't put WD1770s straight on the bus, especially if its as hostile as the Oric's