28 Oct
2015
28 Oct
'15
3:28 p.m.
On 2015-10-28 20:35, Ben Sinclair wrote:
For 18 bit addresses, I assume I would look at 74400
instead? I get
177777 there.
Um? 74400 is 15 bits... :-)
18 bits would be 774400. But 22 bits would be 17774400. And 16 bits
would be 174400.
I would primarily expect 16 bits addresses to be used on a KDF-11, but I
could be wrong. Early revisions only supported 18 bit addressing, but
later models supported 22 bit addressing. But how that is reflected in
the micro-ODT on a KDF-11 I don't know. I don't even know if it's
actually micro-ODT, or some more primitivt console mode on that CPU.
I haven't actually worked on a KDF-11 in about 20 years. I know the
KDJ-11 better at this point. (Or the models with a physical front panel...)
I did just try moving the RLV11 boards below
everything else (except
the BDV11), with the same results as before.
I feel that this is just random testing and moving stuff around, which I
doubt is very helpful.
Johnny
On Wed, Oct 28, 2015 at 12:29 PM, Johnny Billquist <bqt at update.uu.se> wrote:
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
On 2015-10-28 18:25, Ben Sinclair wrote:
I just tried to read 774400 from ODT, and it just gives the question
mark. So, I don't think it's seeing it at all right now! I'll try
moving it next.
I wonder if it really uses 18 bit addresses in the console.
Johnny
On Wed, Oct 28, 2015 at 11:46 AM, Ben Sinclair <ben at bensinclair.com>
wrote:
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
No magic smoke so far!
I think you had written something a while back that would test that
interrupt. Was that correct, or is there another diagnostic I can use
to test that?
The 17440 wasn't a typo, it's just my misunderstanding of how the
addressing works. I'll read the actual location later today and see
what I find!
On Wed, Oct 28, 2015 at 11:43 AM, Noel Chiappa <jnc at mercury.lcs.mit.edu>
wrote:
>
> > From: Ben Sinclair
>
> > According to the Microcomputer Interfaces Handbook, my H9273
> backplane
> > should be all ABCD.
>
> Yup, that was one of the first things I checked - whilst realizing that
> if
> it wasn't, it was too late... :-)
>
> > Am I correct in that I shouldn't have any problem using the RLV11
> in
> > that backplane?
>
> Not that I am aware of.
>
> Noel
--
Ben Sinclair
ben at bensinclair.com