pretty sure the floppy emu HD20 support is only on the external floppy port.
its just the MAC II / MAC IIx that needs to use the internal port for HD20, because those models do not have an external floppy port.
and to answer your question for the 34 to 50 pin mac portable adaptor.
There are some hard drives out there ... they were commonly in the Macintosh Powermac 6100 and maybe some other models,
in sizes of 500/700/1gig, they are called quantum Trail blazer. they have lower power requirements then what the original 40mb needed.
they look like this...
Other wise you can hook up a normal regular Connor 40mb from a Classic or LC, but before you did that
i would try to swap the 34 pin HD pcb, as i mentioned earlier.
otherwise you could use the 34 to 50 pin adaptor with a 3.5 to 2.5 and run a scsi laptop HD as well.
the deal is your power budget is so NARROW for the mac portable... you don't want to over run the 5v or 12v rails... Trust me!
If you decide to go the SCSI 2 SD or SCSI 2 CF option... those options always work great with the 34 to 50 pin adaptor because
they are WAY under the power budget for the portable.
its just the MAC II / MAC IIx that needs to use the internal port for HD20, because those models do not have an external floppy port.
and to answer your question for the 34 to 50 pin mac portable adaptor.
There are some hard drives out there ... they were commonly in the Macintosh Powermac 6100 and maybe some other models,
in sizes of 500/700/1gig, they are called quantum Trail blazer. they have lower power requirements then what the original 40mb needed.
they look like this...
Other wise you can hook up a normal regular Connor 40mb from a Classic or LC, but before you did that
i would try to swap the 34 pin HD pcb, as i mentioned earlier.
otherwise you could use the 34 to 50 pin adaptor with a 3.5 to 2.5 and run a scsi laptop HD as well.
the deal is your power budget is so NARROW for the mac portable... you don't want to over run the 5v or 12v rails... Trust me!
If you decide to go the SCSI 2 SD or SCSI 2 CF option... those options always work great with the 34 to 50 pin adaptor because
they are WAY under the power budget for the portable.