A quick sense-check on this one, to make sure I’m reading things right…
For my birthday, I’m going to be receiving one of Chris Oddy’s replica Atoms.
This has COS/BASIC/FP BASIC/DOS in its main ROM, with DOS mapped in at #E000.
It also has a switchable ROM mapped in at #A000, with four ROM images selectable via a rotary switch.
I have an AtomMMC card knocking about that I’d like to add.
From my research, I’ve managed to gather that if DOS and Econet are both fitted, Econet will take priority because it auto-initialises whereas DOS doesn’t, and DOS can only be selected (via *DOS) if Econet is not fitted.
Presumably, this is easily addressed on the replica by simply hardware-switching the Econet ROM to be active/inactive as required?
Would I be right in further assuming that if the #A000 variant AtomMMC ROM is also present in the switchable Utility ROM, then this could also be selected in preference to DOS (possibly via the LINK command?) and switching the Utility ROM selector?
For my birthday, I’m going to be receiving one of Chris Oddy’s replica Atoms.
This has COS/BASIC/FP BASIC/DOS in its main ROM, with DOS mapped in at #E000.
It also has a switchable ROM mapped in at #A000, with four ROM images selectable via a rotary switch.
I have an AtomMMC card knocking about that I’d like to add.
From my research, I’ve managed to gather that if DOS and Econet are both fitted, Econet will take priority because it auto-initialises whereas DOS doesn’t, and DOS can only be selected (via *DOS) if Econet is not fitted.
Presumably, this is easily addressed on the replica by simply hardware-switching the Econet ROM to be active/inactive as required?
Would I be right in further assuming that if the #A000 variant AtomMMC ROM is also present in the switchable Utility ROM, then this could also be selected in preference to DOS (possibly via the LINK command?) and switching the Utility ROM selector?
Statistics: Posted by Boydie — Wed Oct 29, 2025 10:46 pm