söndag 5 juni 2016 skrev Rod Smallwood <rodsmallwoo...@btinternet.com>:
> > > On 05/06/2016 09:44, Mattis Lind wrote: > >> 2016-06-05 9:58 GMT+02:00 Rod Smallwood <rodsmallwoo...@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 > > If you have a working TU58 with capstans in good shape then congratulations! Do you have XXDP on TU58 cartridges with RX02 diagnostics, then problem solved... I don't have that so I have to use the emulated version. (I on the other hand have maybe ten TU58 in different state of needing repair) I can then also create whatever TU58 cartridge image in SimH which I could use on the real hardware. Makes my life simpler when working with my PDPs. /Mattis
