19 Apr
2007
19 Apr
'07
5:54 p.m.
Re:
From: "Robert Armstrong" <bob at jfcl.com>
Subject: WH-27 Problems (was RE: Heathkit H8's, H9's and H-11's)
....
In extended mode the drive could handle 512K diskettes ... So the bottom
line is that if you want to run standard RT-11 on the H-11, you have to set
the switch to RX-01 mode and you have the equivalent of an RX01 drive. No
double density ...
*************
I don't think that's correct; the controller in the H-27 (WH-27) is a Z-80
with a Western Digital 1771. The 1771 is most definitely single density
only. It's not capable of double density.