You can use
EPDOS17, as an extension(it only allows A,B,C,D and E drives, no SD reader units. I don't find an Epdos19 extension).
It has a lot of commands to manage segments:
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This is a google translation of the help of the commands:
CRAM Removes loaded RAM-resident extensions and unlocks the segments they occupy.
CROM
CROM (NUM)
Deletes the system expander on the specified number of segments. Bypass the specified number of ROM segments from your ROM chain. Then it is advisable to have RST 2 or a boot release to rebuild the peripheral chain to EXOS.
HRAM Segment number, start address, and HELP list of RAM extensions.
HROM Segment number, RAM area, and HELP list of ROM extensions.
LRAM List of RAM segments.
LROM
LROM (file name)
Loads the specified .ROM file. ROM simulation support statement. The "S", "SS" monitor command is suitable for making such files. The loaded max 32K RAM area will be lost. The new ROM is chained and a system restart occurs. The demand for ROMs is then served. Finally, if the ROMs work correctly, EPDOS starts. The EPDOS quick test and EXOS 2.3 will keep the simulated ROM in case of cold start, provided that the segments start with a ? ? ? ? ? ROM string. [ Guests cannot view attachments ]
