Difference between Heath H88 and H89?

Kai Kaltenbach wrote: The H88 was a cassette-based Z-80 system. I got one by upgrading an H-19 terminal. (I believe you could also buy it as a system.) When you upgraded, you replaced the H-19 "badge" with an H-88 "badge". You could also upgrade the H-88 to an H-89 by adding a hard disk controller and floppy disk. When you upgraded, you replaced the H-88 "badge" with an H-89 "badge". So, it's quite possible that not only do they look identical externally, they look identical internally. If what you saw DOESN'T have a floppy disk, then maybe it is the cassette-based system. Look inside. I have the cassette software, if you are masochistic enough to want a copy of it. You might be able to find a hard disk controller and make it into an H-89, if you like. It shouldn't be too hard to find a floppy drive that works, just plug in a DEC RX50 dual floppy! My H-89 has in fact the original prototype (DAM Drive) of the dual floppy, made by T and E Engineering. DEC later bought them out for the Rainbow/uPDP/uVAX, etc. If you need an RX50 drive, I can get you one. Dave