Heathkit H27

[Ethan Dicks]

On 9/7/06, Jay West <jwest at classiccmp.org> wrote:
> Can the H27 (dual 8" floppy drive) be hooked up to an H8? Or was that
> strictly an H11-only device?

Dunno about the H8.

> Of for that matter, can an H27 be hooked up to a non-heath Micro PDP11?

My recollection of debugging some H27 issues a couple of years back is
that there's a boot prom on the Qbus card for the H27.  If that's the
case, then as long as it isn't stomping on a bootstrap ROM somewhere
else on the bus, then you should have no problems.  Heath's card should
be register-level compatible with either the RXV11 or the RXV21 (can't
remember which one right now).

My H-11 came with a KDF-11, DEC memory, pretty much DEC
everything; just the Heath backplane and PSU and floppy controller.
The previous owner never booted from floppy, though; he hacked the
case and added an off-to-the-side CD-interconnect and used an RLV11.

It took a bit of work to get it all back together.

-ethan