I noticed the following curious behavior on one of my older model 71b's (I think it is rom 1bbbb...it has a metal back).
I plugged a HHP 96K ram module into the card reader port. I free'd port 5.00 and 5.01. On the hhp 96K module, this results in a 64K port and 32K port respectively. When I tried to copy a file to port 5.00, I received the error "Insufficient Memory". I can copy files to port 5.01 just fine.
Here's where it gets more interesting. If my forth/assembler rom is present, I can copy to port 5.00.
Also, I have a newer 71b (plastic back) and the HHP 96k ram module works fine in it.
Does my older 71b have a bug which prevents it from utilizing the 64K free'd port? Is this bug somehow overcome with the forth/assembler rom?
Thanks,
Andy