These changes facilitate more robust parameter type checking and helps
to identify unexpected coding errors.
Most simulators can now also be compiled with a C++ compiler without
warnings.
Additionally, these changes have also been configured to facilitate easier
backporting of simulator and device simulation modules to run under the
simh v3.9+ SCP framework.
If a TPC format tape image has garbage at the end of the image, but the
image contains multiple successive tape marks, then assume that logical
End Of Tape is immediately after the last successive tape marks.
OBSERVATION: Calling "sim_tape_rdrecf" to read a tape record sometimes
returns MTSE_EOM and sets the "position not updated" (PNU) flag, even when
an erase gap precedes the EOM. The correct response should be to return
MTSE_RUNAWAY to indicate that spacing over a gap did not end with a data
record or tape mark. Moreover, PNU should not be set, as the position has
been updated.
CAUSE: The routine attempts to handle this case by returning MTSE_RUNAWAY
if the EOF was detected while reading a buffer of gap markers. However, if
a buffer read ends immediately before an EOM marker or the physical EOF,
the next read attempt will return a zero buffer length. The routine
misinterprets this to mean that no gap was present and returns MTSE_EOM and
sets the PNU flag.
RESOLUTION: Modify "sim_tape_rdlntf" (sim_tape.c) to determine whether the
EOM marker or physical EOF was seen on the first or a subsequent buffer
read, and to return MTSE_EOM with PNU or MTSE_RUNAWAY without PNU,
respectively.
256. ENHANCEMENT: Add tape runaway support to the simulator tape library.
OBSERVATION: The ANSI specifications for NRZI, PE, and GCR tape recording
mandate a maximum length of 25 feet for erase gaps. Currently, an erase
gap of any length is ignored when reading or spacing. To allow detection
of non-compliant tape images, the simulator tape library is enhanced to
halt positioning and return tape runaway status if a gap of 25 feet or more
is encountered.
Runaway detection is enabled by calling the tape library to set the tape
density in bits per inch. If this call is not made, erase gaps present in
a tape image are effectively ignored. Also, with the addition of a
separate "set density" call, it is no longer necessary to supply the
density when writing erase gaps.
RESOLUTION: Modify "sim_tape_rdlntf" and "sim_tape_rdlntr" (sim_tape.c) to
detect tape runaway, and add a new MTSE_RUNAWAY status to sim_tape.h. Add
new "sim_tape_set_dens" and "sim_tape_show_dens" functions to set and show
the bits per inch for a unit, respectively, and eliminate the "bpi"
parameter to "sim_tape_wrgap" in preference to using the density
established by a previous "sim_tape_set_dens" call. Add named constants
to "sim_tape.h" that specify the density.
257. ENHANCEMENT: Improve performance when reading or spacing over erase gaps.
OBSERVATION: Performance when reading or spacing over erase gaps is poor,
especially in the reverse direction. Currently, each 4-byte gap marker is
read individually, and in the reverse direction, each read is preceded by a
seek to move the file pointer backward. This combination causes stream
cache invalidation and a physical disc access for each gap marker. As a
single gap consists of over 1000 markers, performance is far worse than if
a gap was read as a block.
RESOLUTION: Modify "sim_tape_rdlntf" and "sim_tape_rdlntr" (sim_tape.c) to
buffer reads of gap markers. Using a 128-element buffer, performance
improves about thirty-fold.
258. PROBLEM: Writing an end-of-medium positions the tape image after the mark.
OBSERVATION: The "sim_tape_wreom" simulator tape library function writes
an end-of-medium marker on the tape image. The intent is to erase the
remainder of the tape. The "SIMH Magtape Representation and Handling"
document states that the tape position is not updated by this function.
However, the function leaves the tape positioned after the marker.
A subsequent read would stop at the EOM marker. However, writing a new
marker over that one would then allow reading of the data following the EOM
that supposedly had been erased by the original "sim_tape_wreom" call.
CAUSE: The tape position is updated by the internal "sim_tape_wrdata" call
that is used to write the EOM marker, but it is not reset afterward by the
function.
RESOLUTION: Modify "sim_tape_wreom" (sim_tape.c) to reset the tape
position to point at the EOM marker before returning. This prevents
reading past an EOM marker, and a subsequent write will overwrite the
marker rather than embed it between data records.
259. PROBLEM: Reading through an erase gap in reverse may return EOM status.
OBSERVATION: A reverse read or spacing operation through an erase gap may
return end-of-medium status. Reading or spacing forward through the same
gap works properly.
CAUSE: Writing an erase gap over existing records may produce a gap that
is longer than requested. This occurs when truncating the last record to
be overlaid by the gap would leave a record that is shorter than the
minimum size allowed (eight bytes for the length words plus two bytes for
the data). In this case, the gap is lengthened to overlay the entire
record. If the new gap size is not evenly divisible by four, a half-gap is
metadata marker of value 0xFFFF added to the beginning of the gap.
If a gap that begins with a half-gap marker is written immediately after
a previous gap, the "seam" between gaps will contain the bytes FE FF FF FF
( FF FF ) FE FF FF FF.... Reading forward across this seam will yield a
metadata value of 0xFFFEFFFF, which is recognized and handled by seeking
two bytes back to resynchronize reading. However, reading in reverse will
yield the value 0xFFFFFFFF, which is interpreted as end-of-medium.
RESOLUTION: Modify "sim_tape_rdlntr" (sim_tape.c) to recognize 0xFFFFFFFF
as a half-gap marker and resynchronize in response. End of medium cannot
occur when reading in reverse, as it is impossible to position the tape
image beyond an EOM marker. Therefore, any 0xFFFFFFFF value encountered
must be a half-gap "seam" originating as above.
260. PROBLEM: sim_tape_wrgap fails when format is changed from SIMH format.
OBSERVATION: The HP 2100 magnetic tape simulator supports erase gaps and
calls sim_tape_wrgap when commanded to write a gap. However, if a tape
format other than SIMH format is selected, the call fails with MTSE_FMT.
CAUSE: Erase gaps are not supported in formats other than SIMH, but the
call should not fail. Instead, the call should be a "no-operation" if the
underlying format does not support gaps.
RESOLUTION: Modify "sim_tape_wrgap" (sim_tape.c) to return MTSE_OK with no
action performed if a tape format other than SIMH is selected.
261. PROBLEM: The magnetic tape format of an attached unit may be changed.
OBSERVATION: The magnetic tape library supports several tape image
formats. The format to use may be specified either by an "ATTACH -F"
command or by a "SET <unit> FORMAT" command. The latter calls the
"sim_tape_set_fmt" function, which allows the format of a file currently
attached to be changed. However, the format is an intrinsic property of
the tape image file, so changing it once the file has been attached makes
no sense.
CAUSE: Oversight.
RESOLUTION: Modify "sim_tape_set_fmt" (sim_tape.c) to return an error
(SCPE_ALATT, "Unit already attached") if the unit is attached.
- A -R flag is forced (attach READ ONLY) when TPC formatted tapes are attached. This should avoid updating file modified timestamps by any simh simulator.
- All write operations to TPC formatted tapes will fail with a write protected status.
The goals here being to simplify calling code while getting consistent output delivered everywhere it may be useful.
Modified most places which explicitly used sim_log or merely called printf to now avoid doing that and merely call sim_printf().
- Added event debug support to scp and the vax simulator
- Moved external declarations into include files related to modules which define them and removed random externs from modules which referenced them
- Fixed typos in sim_ether
- Fixed sim_disk and sim_tape to properly manage asynchronous threads on an i/o flush
I’ve always wanted to have the option to have simulated devices behave
more naturally with respect to I/O operations. By more naturally I
mean that the current simulator model I/O is either polled (for asynchronous
things link Muxes and Network), or it is performed in the middle of some
instruction execution taking possibly many milliseconds (disk and/or tapes).
The existing model creates quite deterministic behavior which helps to debug
and understand issues, but it trades off potential instruction execution
while performing these I/O operations in between instruction execution.
To address this concept (while still retaining the potential advantages of
the original model), I’ve designed an Asynch I/O model extension for simh.
In order to flesh-out and debug this design, I’ve also refactored several
devices to utilize this capability. Please read the attached
0readmeAsynchIO.txt file for concept details about the approach.
In order to make disk devices easy to implement (within or without the
AsynchIO framework), I’ve created a sim_disk.c library which is modeled
on the sim_tape.c library to generalize disk I/O like tape I/O is
generalized in sim_tape.c. This sim_disk.c library now provides that
natural place to implement support for various disk implementation formats
(just like sim_tape support several formats, and one day will be the place
to add direct physical tape access). The current sim_disk library provides
the framework for direct support of 3 different disk formats:
1) standard simh disk format
2) platform specific physical disk access
and 3) platform independent Virtual Disk format.
The Virtual Disk format is an implementation of the format described in
the ”Microsoft Virtual Hard Disk (VHD) Image Format Specification”. The
VHD specification is available for anyone to implement under the "Microsoft
Open Specification Promise" described at
http://www.microsoft.com/interop/osp/default.mspx.
The VHD implementation includes support for:
1) Fixed sized disks
2) Dynamically expanding disks
and 3) Differencing Disks.
Dynamically expanding disks don’t change their “Virtual Size”, but they
don’t consume disk space on the containing storage until the virtual
sectors in the disk are actually written to (i.e. an RA81 or RA92 VHD
with a VMS installed on it may initially only contain 30+ MB of files,
and the resulting VHD will be 30+ MB). The VHD format contains meta data
which describes the virtual device. Amongst this meta data is the simh
device type which the VHD was originally created as. This metadata is
therefore available whenever that VHD is attached to an emulated disk
device in the future so the device type & size can be automatically be
configured.
Sim_disk_attach is used by device emulations to attach a simh/vhd/raw
device to a simulated device. The following simh command switches
are used by the sim_disk_attach API:
-R Attach Read Only.
-E Must Exist (if not specified an attempt to create the
indicated virtual disk will be attempted).
-F Open the indicated disk container in a specific format
(default is to autodetect VHD defaulting to simh if the
indicated container is not a VHD).
-X When creating a VHD, create a fixed sized VHD (vs a
Dynamically expanding one).
-C Create a VHD and copy its contents from another disk
(simh, VHD, or RAW format).
-D Create a Differencing VHD (relative to an already
existing VHD disk)
Examples:
sim> show rq
RQ, address=20001468-2000146B*, no vector, 4 units
RQ0, 159MB, not attached, write enabled, RD54, autosize, SIMH format
RQ1, 159MB, not attached, write enabled, RD54, autosize, SIMH format
RQ2, 159MB, not attached, write enabled, RD54, autosize, SIMH format
RQ3, 409KB, not attached, write enabled, RX50, autosize, SIMH format
sim> atta rq0 RA81.vhd
sim> show rq0
RQ0, 456MB, attached to RA81.vhd, write enabled, RA81, autosize, VHD format
sim> set rq2 ra92
sim> att rq2 -f vhd RA92.vhd
RQ2: creating new file
sim> sho rq2
RQ2, 1505MB, attached to RA92.vhd, write enabled, RA92, autosize, VHD format
sim> ! dir RA92.vhd
Volume in drive H is New Volume
Volume Serial Number is F8DE-510C
Directory of H:\Data
04/14/2011 12:57 PM 5,120 RA92.vhd
1 File(s) 5,120 bytes
0 Dir(s) 3,074,412,544 bytes free
sim> atta rq3 -c RA92-1.vhd RA92.vhd
sim> atta rq3 -c RA92-1.vhd RA92.vhd
RQ3: creating new virtual disk 'RA92-1.vhd'
RQ3: Copied 1505MB. 99% complete.
RQ3: Copied 1505MB. Done.
sim> sh rq3
RQ3, 1505MB, attached to RA92-1.vhd, write enabled, RA92, autosize, VHD format
sim> ! dir RA92*
Volume in drive H is New Volume
Volume Serial Number is F8DE-510C
Directory of H:\Data
04/14/2011 01:12 PM 5,120 RA92-1.vhd
04/14/2011 12:58 PM 5,120 RA92.vhd
2 File(s) 10,240 bytes
0 Dir(s) 3,074,404,352 bytes free
sim> sho rq2
RQ2, 1505MB, not attached, write enabled, RA92, autosize, VHD format
sim> set rq2 ra81
sim> set rq2 noauto
sim> sho rq2
RQ2, 456MB, not attached, write enabled, RA81, noautosize, VHD format
sim> set rq2 format=simh
sim> sho rq2
RQ2, 456MB, not attached, write enabled, RA81, noautosize, SIMH format
sim> atta rq2 -c RA81-Copy.vhd VMS055.dsk
RQ2: creating new virtual disk 'RA81-Copy.vhd'
RQ2: Copied 456MB. 99% complete.
RQ2: Copied 456MB. Done.
sim> sho rq2
RQ2, 456MB, attached to RA81-Copy.vhd, write enabled, RA81, noautosize, VHD format
sim> det rq2
sim> ! dir RA81-Copy.vhd
Volume in drive H is New Volume
Volume Serial Number is F8DE-510C
Directory of H:\Data
04/14/2011 01:22 PM 178,304,512 RA81-Copy.vhd
1 File(s) 178,304,512 bytes
0 Dir(s) 2,896,097,280 bytes free
sim> ! dir VMS055.dsk
Volume in drive H is New Volume
Volume Serial Number is F8DE-510C
Directory of H:\Data
03/08/2011 01:42 PM 403,663,872 VMS055.dsk
1 File(s) 403,663,872 bytes
0 Dir(s) 2,896,097,280 bytes free
sim>
The makefile now works for Linux and most Unix's. Howevr, for Solaris
and MacOS, you must first export the OSTYPE environment variable:
> export OSTYPE
> make
Otherwise, you will get build errors.
1. New Features
1.1 3.8-0
1.1.1 SCP and Libraries
- BREAK, NOBREAK, and SHOW BREAK with no argument will set, clear, and
show (respectively) a breakpoint at the current PC.
1.1.2 GRI
- Added support for the GRI-99 processor.
1.1.3 HP2100
- Added support for the BACI terminal interface.
- Added support for RTE OS/VMA/EMA, SIGNAL, VIS firmware extensions.
1.1.4 Nova
- Added support for 64KW memory (implemented in third-party CPU's).
1.1.5 PDP-11
- Added support for DC11, RC11, KE11A, KG11A.
- Added modem control support for DL11.
- Added ASCII character support for all 8b devices.
1.2 3.8-1
1.2.1 SCP and libraries
- Added capability to set line connection order for terminal multiplexers.
1.2.2 HP2100
- Added support for 12620A/12936A privileged interrupt fence.
- Added support for 12792C eight-channel asynchronous multiplexer.
2. Bugs Fixed
Please see the revision history on http://simh.trailing-edge.com or
in the source module sim_rev.h.
1. New Features
1.1 3.7-0
1.1.1 SCP
- Added SET THROTTLE and SET NOTHROTTLE commands to regulate simulator
execution rate and host resource utilization.
- Added idle support (based on work by Mark Pizzolato).
- Added -e to control error processing in nested DO commands (from
Dave Bryan).
1.1.2 HP2100
- Added Double Integer instructions, 1000-F CPU, and Floating Point
Processor (from Dave Bryan).
- Added 2114 and 2115 CPUs, 12607B and 12578A DMA controllers, and
21xx binary loader protection (from Dave Bryan).
1.1.3 Interdata
- Added SET IDLE and SET NOIDLE commands to idle the simulator in wait
state.
1.1.4 PDP-11
- Added SET IDLE and SET NOIDLE commands to idle the simulator in wait
state (WAIT instruction executed).
- Added TA11/TU60 cassette support.
1.1.5 PDP-8
- Added SET IDLE and SET NOIDLE commands to idle the simulator in wait
state (keyboard poll loop or jump-to-self).
- Added TA8E/TU60 cassette support.
1.1.6 PDP-1
- Added support for 16-channel sequence break system.
- Added support for PDP-1D extended features and timesharing clock.
- Added support for Type 630 data communications subsystem.
1.1.6 PDP-4/7/9/15
- Added SET IDLE and SET NOIDLE commands to idle the simulator in wait
state (keyboard poll loop or jump-to-self).
1.1.7 VAX, VAX780
- Added SET IDLE and SET NOIDLE commands to idle the simulator in wait
state (more than 200 cycles at IPL's 0, 1, or 3 in kernel mode).
1.1.8 PDP-10
- Added SET IDLE and SET NOIDLE commands to idle the simulator in wait
state (operating system dependent).
- Added CD20 (CD11) support.
2. Bugs Fixed
Please see the revision history on http://simh.trailing-edge.com or
in the source module sim_rev.h.
The save/restore format has been updated to improve its reliability.
As a result, save files prior to release 3.0 are no longer supported.
The text documentation files are obsolete and are no longer included
with the distribution. Up-to-date PDF documentation files are
available on the SimH web site.
1. New Features
1.1 3.6-0
1.1.1 Most magnetic tapes
- Added support for limiting tape capacity to a particular size in MB
1.1.2 IBM 7090/7094
- First release
1.1.3 VAX-11/780
- Added FLOAD command, loads system file from console floppy disk
1.1.4 VAX, VAX-11/780, and PDP-11
- Added card reader support (from John Dundas)
1.1.5 PDP-11
- Added instruction history
2. Bugs Fixed
Please see the revision history on http://simh.trailing-edge.com or
in the source module sim_rev.h.
The source set has been extensively overhauled. For correct
viewing, set Visual C++ or Emacs to have tab stops every 4
characters.
1. New Features
1.1 3.5-0
1.1.1 All Ethernet devices
- Added Windows user-defined adapter names (from Timothe Litt)
1.1.2 Interdata, SDS, HP, PDP-8, PDP-18b terminal multiplexors
- Added support for SET <unit>n DISCONNECT
1.1.3 VAX
- Added latent QDSS support
- Revised autoconfigure to handle QDSS
1.1.4 PDP-11
- Revised autoconfigure to handle more cases
1.2 3.5-1
No new features
1.3 3.5-2
1.3.1 All ASCII terminals
- Most ASCII terminal emulators have supported 7-bit and 8-bit
operation; where required, they have also supported an upper-
case only or KSR-emulation mode. This release adds a new mode,
7P, for 7-bit printing characters. In 7P mode, non-printing
characters in the range 0-31 (decimal), and 127 (decimal), are
automatically suppressed. This prevents printing of fill
characters under Windows.
The printable character set for ASCII code values 0-31 can be
changed with the SET CONSOLE PCHAR command. Code value 127
(DELETE) is always suppressed.
1.3.2 VAX-11/780
- First release. The VAX-11/780 has successfully run VMS V7.2. The
commercial instructions and compatability mode have not been
extensively tested. The Ethernet controller is not working yet
and is disabled.
2. Bugs Fixed
2.1 3.5-0
2.1.1 SCP and libraries
- Trim trailing spaces on all input (for example, attach file names)
- Fixed sim_sock spurious SIGPIPE error in Unix/Linux
- Fixed sim_tape misallocation of TPC map array for 64b simulators
2.1.2 1401
- Fixed bug, CPU reset was clearing SSB through SSG
2.1.3 PDP-11
- Fixed bug in VH vector display routine
- Fixed XU runt packet processing (found by Tim Chapman)
2.1.4 Interdata
- Fixed bug in SHOW PAS CONN/STATS
- Fixed potential integer overflow exception in divide
2.1.5 SDS
- Fixed bug in SHOW MUX CONN/STATS
2.1.6 HP
- Fixed bug in SHOW MUX CONN/STATS
2.1.7 PDP-8
- Fixed bug in SHOW TTIX CONN/STATS
- Fixed bug in SET/SHOW TTOXn LOG
2.1.8 PDP-18b
- Fixed bug in SHOW TTIX CONN/STATS
- Fixed bug in SET/SHOW TTOXn LOG
2.1.9 Nova, Eclipse
- Fixed potential integer overflow exception in divide
2.2 3.5-1
2.2.1 1401
- Changed character encodings to be compatible with Pierce 709X simulator
- Added mode for old/new character encodings
2.2.2 1620
- Changed character encodings to be compatible with Pierce 709X simulator
2.2.3 PDP-10
- Changed MOVNI to eliminate GCC warning
2.2.4 VAX
- Fixed bug in structure definitions with 32b compilation options
- Fixed bug in autoconfiguration table
2.2.5 PDP-11
- Fixed bug in autoconfiguration table
2.3 3.5-2
2.3.1 PDP-10
- RP: fixed drive clear not to clear disk address
2.3.2 PDP-11 (VAX, VAX-11/780, for shared peripherals)
- HK: fixed overlap seek interaction with drive select, drive clear, etc
- RQ, TM, TQ, TS, TU: widened address display to 64b when USE_ADDR64 option selected
- TU: changed default adapter from TM02 to TM03 (required by VMS)
- RP: fixed drive clear not to clear disk address
- RP, TU: fixed device enable/disable to enabled/disable Massbus adapter as well
- XQ: fixed register access alignment bug (found by Doug Carman)
2.3.3 PDP-8
- RL: fixed IOT 61 decoding bug (found by David Gesswein)
- DF, DT, RF: fixed register access alignment bug (found by Doug Carman)
2.3.4 VAX
- Fixed CVTfi to trap on integer overflow if PSW<iv> is set
- Fixed breakpoint detection when USE_ADDR64 option selected
The source set has been extensively overhauled. For correct
viewing, set Visual C++ or Emacs to have tab stops every 4
characters.
1. New Features in 3.4-1
1.1 All Ethernet devices
- Added Windows user-defined adapter names (from Timothe Litt)
1.2 Interdata, SDS, HP, PDP-8, PDP-18b terminal multiplexors
- Added support for SET <unit>n DISCONNECT
1.3 VAX
- Added latent QDSS support
- Revised autoconfigure to handle QDSS
1.4 PDP-11
- Revised autoconfigure to handle more casees
2. Bugs Fixed in 3.4-1
2.1 SCP and libraries
- Trim trailing spaces on all input (for example, attach file names)
- Fixed sim_sock spurious SIGPIPE error in Unix/Linux
- Fixed sim_tape misallocation of TPC map array for 64b simulators
2.2 1401
- Fixed bug, CPU reset was clearing SSB through SSG
2.3 PDP-11
- Fixed bug in VH vector display routine
- Fixed XU runt packet processing (found by Tim Chapman)
2.4 Interdata
- Fixed bug in SHOW PAS CONN/STATS
- Fixed potential integer overflow exception in divide
2.5 SDS
- Fixed bug in SHOW MUX CONN/STATS
2.6 HP
- Fixed bug in SHOW MUX CONN/STATS
2.7 PDP-8
- Fixed bug in SHOW TTIX CONN/STATS
- Fixed bug in SET/SHOW TTOXn LOG
2.8 PDP-18b
- Fixed bug in SHOW TTIX CONN/STATS
- Fixed bug in SET/SHOW TTOXn LOG
2.9 Nova, Eclipse
- Fixed potential integer overflow exception in divide
RESTRICTION: The PDP-15 FPP is only partially debugged. Do NOT
enable this feature for normal operations.
RESTRICTION: The HP DS disk is not debugged. DO NOT enable this
feature for normal operations.
1. New Features in 3.2-3
1.1 SCP
- Added ECHO command (from Dave Bryan)
2. Bugs Fixed in 3.2-2
2.1 SCP
- Qualified RESTORE detach with SIM_SW_REST
- Fixed OS/2 issues in sim_console.c and sim_sock.h
2.2 HP2100 (all from Dave Bryan)
- Changed CPU error stops to report PC not PC + 1
- Fixed CLC to DR to stop operation in progress
- Functional and timing fixes to DP
> controller sets ATN for all commands except read status
> controller resumes polling for ATN interrupts after read status
> check status on unattached drive set busy and not ready
> check status tests wrong unit for write protect status
> drive on line sets ATN, will set FLG if polling
- Functional and timing fixes to MS
> fixed erroneous execution of rejected command
> fixed erroneous execution of select-only command
> fixed erroneous execution of clear command
> fixed odd byte handling for read
> fixed spurious odd byte status on 13183A EOF
> modified handling of end of medium
> added detailed timing, with fast and realistic modes
> added reel sizes to simulate end of tape
> added debug printouts
- Modified MT handling of end of medium
- Added tab to TTY control char set
2.3 VAX
- VAX RQ controllers start LUNs at 0 (from Andreas Cejna)
- Added compatibility mode definitions
- Fixed EMODD, EMODG to probe second longword of quadword destination
RESTRICTION: The PDP-15 FPP is only partially debugged. Do NOT
enable this feature for normal operations.
WARNING: The core simulator files (scp.c, sim_*.c) have been
reorganized. Unzip V3.2-0 to an empty directory before attempting
to compile the source.
IMPORTANT: If you are compiling for UNIX, please read the notes
for Ethernet very carefully. You may need to download a new
version of the pcap library, or make changes to the makefile,
to get Ethernet support to work.
1. New Features in 3.2-0
1.1 SCP and libraries
- Added SHOW <device> RADIX command.
- Added SHOW <device> MODIFIERS command.
- Added SHOW <device> NAMES command.
- Added SET/SHOW <device> DEBUG command.
- Added sim_vm_parse_addr and sim_vm_fprint_addr optional interfaces.
- Added REG_VMAD flag.
- Split SCP into separate libraries for easier modification.
- Added more room to the device and unit flag fields.
- Changed terminal multiplexor library to support unlimited.
number of async lines.
1.2 All DECtapes
- Added STOP_EOR flag to enable end-of-reel error stop
- Added device debug support.
1.3 Nova and Eclipse
- Added QTY and ALM multiplexors (Bruce Ray).
1.4 LGP-30
- Added LGP-30/LGP-21 simulator.
1.5 PDP-11
- Added format, address increment inhibit, transfer overrun
detection to RK.
- Added device debug support to HK, RP, TM, TQ, TS.
- Added DEUNA/DELUA (XU) support (Dave Hittner).
- Add DZ per-line logging.
1.6 18b PDP's
- Added support for 1-4 (PDP-9)/1-16 (PDP-15) additional
terminals.
1.7 PDP-10
- Added DEUNA/DELUA (XU) support (Dave Hittner).
1.8 VAX
- Added extended memory to 512MB (Mark Pizzolato).
- Added RXV21 support.
2. Bugs Fixed in 3.2-0
2.1 SCP
- Fixed double logging of SHOW BREAK (found by Mark Pizzolato).
- Fixed implementation of REG_VMIO.
2.2 Nova and Eclipse
- Fixed device enable/disable support (found by Bruce Ray).
2.3 PDP-1
- Fixed bug in LOAD (found by Mark Crispin).
2.4 PDP-10
- Fixed bug in floating point unpack.
- Fixed bug in FIXR (found by Phil Stone, fixed by Chris Smith).
2.6 PDP-11
- Fixed bug in RQ interrupt control (found by Tom Evans).
2.6 PDP-18B
- Fixed bug in PDP-15 XVM g_mode implementation.
- Fixed bug in PDP-15 indexed address calculation.
- Fixed bug in PDP-15 autoindexed address calculation.
- Fixed bugs in FPP-15 instruction decode.
- Fixed clock response to CAF.
- Fixed bug in hardware read-in mode bootstrap.
- Fixed PDP-15 XVM instruction decoding errors.
2.7 VAX
- Fixed PC read fault in EXTxV.
- Fixed PC write fault in INSV.
