Heathkit H-11 restoration questions - test-drb@ccmp.vtda.org

4 Oct 1999

On Oct 4,  8:50, allisonp(a)world.std.com wrote:
...
  Subject: Re: Heathkit H-11 restoration questions
 > with a much more interesting banner.  It claims to be Rev 0.9 of a ROM set
...
  > for the 11/23plus, and after verbosely testing
memory, tries to boot DU3.
...

 The M8189 was available as two basic versions  11/23 and the plus.  The
 primary difference was what it could boot. 
I don't think Alison means 11/23 and 11/23plus; the 11/23 uses a
dual-height M8186 (KDF11-A) board.  But the M8189 was used in both
11/23plus (BA11-N box, IIRC) and microPDP11/23 (BA23 box).  The difference
was just the boot ROMs, as she said.

-- 

Pete						Peter Turnbull
						Dept. of Computer Science
						University of York