> From: Tony Duell
> Were there 2 things called the KM11?
> The KM11 that I know is the maintenance unit
> From: Paul Birkel
> I think that we're all talking about the ML11-A, or at least are
> intending to ... although the Subject line has been erroneous from the
>
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Tony Duell
> via cctalk
> Sent: Friday, September 24, 2021 4:12 AM
> To: Noel Chiappa; General Discussion: On-Topic and Off-Topic Posts
> Subject: Re: DEC KM11 (Was: DEC KL11)
>
&
On Thu, Sep 23, 2021 at 6:38 PM Noel Chiappa via cctalk
wrote:
> Huh? The KM11 doesn't plug into the UNIBUS (or QBUS); it's a MASSBUS device (a
> solid-state storage device, actually), so it plugs into an RH11 or RH70 or
> something like that. (I should work with the VAX MASSBUS controller, too.)
My notes (from sources unknown) say (of the ML11A):
solid-state (ram) disk; 2MB/s xfer
1-31 arrays of 512 or 2048 blocks ea
using 11/70 MK11 (MOS) memory
looked like RS03/RS04 to s/w
Ok, that makes sense.
http://gunkies.org/wiki/RS03/04_disk_drive
says about *REAL* RS03/04
> But the sector format is a different matter. If it's designed for
> PDP-11 and friends, presumably it has a 512 byte sector size.
> For PDP-10 or -20 use you'd presumably want a sector size consisting
> of some round number of 36 bit words.
576 byte sectors (128 words), IIRC.
The unit of allo
> From: Paul Koning
> But the sector format is a different matter. If it's designed for
> PDP-11 and friends, presumably it has a 512 byte sector size. For
> PDP-10 or -20 use you'd presumably want a sector size consisting of
> some round number of 36 bit words.
Actually, the
> On Sep 23, 2021, at 1:38 PM, Noel Chiappa via cctalk
> wrote:
>
>> So I can't say whether they are 18 bit compatible.
>
> Huh? The KM11 doesn't plug into the UNIBUS (or QBUS); it's a MASSBUS device (a
> solid-state storage device, actually), so it plugs into an RH11 or RH70 or
> something
> From: Mark Kahrs
There's a typo in your original Subject: line: the KL11 is a very early UNIBUS
(probably the very first UNIBUS device ever, looking at the board's Mxxx
number) asyn serial line interface:
https://gunkies.org/wiki/KL11_asynchronous_serial_line_interface
> manx tells
A few details for the curious:
It's housed in a BA-11 box with 3 controller cards.
The Massbus paddles fit into that box and terminate in flat ribbon cable,
not the massive cables.
The DRAM chips are 4116s.
manx tells me that these documents were known to exist:
PartTitleStatus
EK-0ML11-TD *ML11
