11/04 latest

[Rod Smallwood]

On 05/06/2016 09:44, Mattis Lind wrote:
> 2016-06-05 9:58 GMT+02:00 Rod Smallwood <rodsmallwood52 at btinternet.com>:
>
>> Hi
>>
>>      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
>
>
>> Rod Smallwood
>>
>>
>>
Hi Mattis
                 Now what would I want a TU58 emulator for when I have 
real one? ( : > )
Rod