11/04 latest - oops, 11/94

[Rod Smallwood]

On 05/06/2016 12:31, Henk Gooijen wrote:
> -----Oorspronkelijk bericht----- From: Mattis Lind Sent: Sunday, June 
> 05, 2016 10:44 AM To: General Discussion: On-Topic and Off-Topic Posts 
> Subject: Re: 11/04 latest
> 2016-06-05 9:58 GMT+02:00 Rod Smallwood <rodsmallwood52 at btinternet.com>:
>
>>     Well lots fun with the 11/94 project. In fact its become an 11/84 
>> and
>> 11/94 project.
>>
>> After following Sherlock Holmes advice "when you have eliminated
>> everything else.Whats left however unlikely is the answer"   I 
>> discovered
>> the RX211 needed to be in CDEF and not ABCD.  Why did I not know that?
>> Well I can only put it down to the fact all of the UNIBUS options I ever
>> worked with were hex modules.
>>
>> Next fascinating fact. You can switch between being an 11/84 and an
>> 11/94.  Although one box has three Qbus slots and the other (11/84) has
>> four.  If you put an 11/84 CPU  in slot 1 and a MSV11-J (PMI) in 2 or 
>> 3 it
>> does its startup tests and goes into the monitor screen.
>>
>> If you try to boot the RX02 in 11/84 mode you get
>>
>> (the drive does get accessed - there's a nice healthy clonk)
>>
>> Trying DY0
>> Error 101
>> Unexpected trap to location 114
>> See troubleshooting   documentation
>> Updated PC 173260          PCR Page = 62       Program listing address =
>> 062260
>> R0 = 000000            R1 = 177170         R2 = 042131 R3 = 000000
>> R4 = 024000            R5 = 000000          R6 = 172276 R7 = 001600
>>
>> In 11/94  mode it stops at the same point but does not give the error
>> message.
>>
>> Comments gentlemen please
>
> OK.
>
> Is this RX211 + RX02 a known working set? It could be useful to wire up a
> DL11 (of some sort) at 176500 and connect it to a TU58 emulator to run 
> some
> kind of XXDP diagnostics for RX02 / RX211.
>
> Maybe also run other XXDP CPU diagnostics even though the boot ROM 
> probably
> include quite some diagnostics for the CPU and memory.
>
> /Mattis
>
> ---------
>
> Hmmm, if the RX211 has been in position A-B-C-D instead of C-D-E-F, I 
> would
> check what the effect is on the module. Would it still be correctly 
> functioning?
> - Henk
Hi
        I have two RX211 and the other one never went in the wrong slot 
and the result is the same.
Mattis idea of loading xxdp from the TU85 looks possible.
  I also have an RX01. I'll see if I have an interface for it.
There's also a  Qbus interface for RX 's

Rod