Syscom II (II+ Clone) ROM missing cassette functions?

[westveld]

Do some machines (or ROMs?) not support cassette?
The case has the labelled ports. ROMs could be non-stock

At the basic ] prompt:
LOAD, SAVE, LOAD "TEST" - all give a ?SYNTAX ERROR immediately

In the CALL -151 monitor:
2000.62E7R - returns immediately, no error
Same with any xxxx.xxxxR or xxxx.xxxxW commands

Thoughts?

More details -

I'm working on bringing up this machine - It has a floppy drive, but no Apple disks were included.

It has a 16k Ram expansion by DOKAY COMPUTER (?) and an Apple Disk II interface card with a Mitac drive.

Trying to get data to it via ADTPro over the cassette port.

Machine boot screen says SYNTRON CORP

Ctrl-Esc gets to basic

 

[Eudimorphodon]

I wish I had an answer but unfortunately my Syscom-II had its motherboard swapped for a real Apple II+ one by the previous owner. I’d be… surprised, if this was normal.

 

[westveld]

It did also come with an unbranded parallel card that seems to work.

Maybe I can dump the ROMs out with that and see if there is any funny business there.

To be continued...