I hadn't been checking on firmware updates, so I was elated to see the addition of the SDX-stacking function. Unfortunately, I cannot get it to work at all.
Here's my setup:
-NTSC Atari 65XE (no ECI port)
-AVGCART (firmware 0025, EXTRAM not enabled)
-FujiNet
There are a couple cartridges (AtariWriter, Microsoft BASIC) that have a strange boot-time conflict with the FujiNet, so I'm wanting to use SDX with the offending cartridges stacked on top so that I can defer their bootup and avoid the conflict. As instructed in De Re AVGCART, I have copied an SDX image into the _AVGCART folder on the SD card, with the proper filename; I've tried several versions, in fact (attached to this post).
The problem manifests like this:
-AVGCART boots up into the file picker
-I navigate to a desired utility cartridge and execute the CTRL-SHIFT-RETURN key chord
--If FujiNet is off or not plugged in, the bootup fails and the Self-Test ROM is active, as if a cartridge were not present at all
--If FujiNet is on, the bootup fails with a message of "Error: No DOS"
The bootup fails consistently no matter which utility cartridge I choose. I wonder if the stacking function is sensitive to the SDX hardware version (as listed here). I originally tried the SIC! Cartridge version, since it contains the manpages, but the problem persists with the "Altirra and Atari800 emulators" version too. I have not yet tried the other versions, but my hopes are not high.
SDX449_siccart_256_full.CAR
SDX449_siccart_full.CAR
SDX449_sdx128.car