[Simh] Error in DMC11/DMR11 Emulation in RSTS/E 10.1

[Christian Gauger-Cosgrove]

As the subject line says, there's an issue with the DMC device under
RSTS/E 10.1-L.

When starting the system, when it does the hardware scan, the
following errors are printed on the TTI/TTO console:
Device XM2: internal micro-diagnostic failure - device disabled.
Device XM3: internal micro-diagnostic failure - device disabled.
XM4: is missing ECO's, but will still function.
XM1: is missing ECO's, but will still function.
XM0: is missing ECO's, but will still function.

There are five DMC lines due to testing.
DMC0/XM0 and DMC1/XM1 are DMC11, with micro-diagnostics enabled.
DMC2/XM2 is a DMR11, with micro-diagnostics enabled.
DMC3/XM3 is a DMR11, with micro-diagnostics disabled.
DMC4/XM4 is a DMC11, with micro-diagnostics disabled.

>From that test we can see that the DMR11 does not work under RSTS/E
with or without micro-diagnostics; and further that DMC11 simulation
works but isn't "up to date" enough for RSTS/E 10.1-L (at least I'm
assuming that is what is meant by the "missing ECO's" statement).

It exhibits this behaviour both when starting up SYSGEN.SIL, and when
doing a normal system start-up. The simulator is configured as a
UNIBUS machine (11/94 if that matters); trying it with a QBUS machine
(11/93)... and SIMH crashes promptly.


Here's the "show version" output for completeness' sake:
sim> show version
PDP-11 simulator V4.0-0 Beta
        Simulator Framework Capabilities:
                32b data
                32b addresses
                Ethernet Packet transports:PCAP:NAT:UDP
                Idle/Throttling support is available
                Virtual Hard Disk (VHD) support
                RAW disk and CD/DVD ROM support
                Asynchronous I/O support
                FrontPanel API Version 1
        Host Platform:
                Compiler: Microsoft Visual C++ 15.00.30729.01
                Simulator Compiled: Dec 19 2015 at 12:51:02
                Memory Access: Little Endian
                Memory Pointer Size: 32 bits
                Large File (>2GB) support
                PCRE RegEx support for EXPECT commands
                OS clock resolution: 1ms
                Time taken by msleep(1): 1ms
                OS: Windows:
Microsoft Windows [Version 6.1.7601]
                Intel64 Family 6 Model 58 Stepping 9, GenuineIntel - x86-AMD64

        git commit id: ca4a6901


Best regards,
Christian Gauger-Cosgrove
-- 
Christian M. Gauger-Cosgrove
STCKON08DS0
Contact information available upon request.