-----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 <rodsmallwoo...@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
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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
