This is a working simulator for the SEL Concept/32 computer. The current version is for the SEL 32/27, 32/67, 32/77, 32/87, 32/97, V6, and V9 computers. All of the processors except for the 32/77 can run the Gould diags. Operational support for the 32/77 computers may be added in the future. Additional processors are now supported. The 32/6780, 32/8780, 32/9780, V6/IPU, and V9/IPU processors with an IPU able to run an additional instruction stream. Threads are used so support is provided by both Windows and Linux.
This simulator is capable of running UTX2.1A, UTX2.1B, MPX 1.5F, MPX 3.4, MPX 3.5, MPX 3.6, and SEL diagnostics. Actually any software using the SEL instruction set should work. It is capable of creating a disk image for the O/S from a UTX or MPX SDT tape. The disk image can be booted, initialized, and can run many of the UTX and MPX utilities and programs. Ethernet is supported on UTX and will be added to MPX in the future. Eight terminals can be used to access MPX or UTX via Telnet port 4747. The sumulator has support for excess 64 floating point arithmetic and passes the 32/27 and 32/67 FP diags. UTX is the SEL version of System V Unix and BSD Unix ported to the V6 and V9 processors. UTX utilizes the basemode instruction set and a virtual memory system supported by the V6 & V9 CPUs. The IPU is also supported by UTX and MPX-32. The system needs further testing to solidify the SEL32 simulator code in all of the supported environmenets and hardware configurations.
The installs directory contains the simh command files to install and run multiple UTX, MPX1X, and MPX3X systems. The install tape images are in the tapes directory and created disks are in the dsk directory. The dsk and tapes directories are initially missing but will be created during the installation. The required tape(s) are read from the repo at https://github.com/AZBevier/SEL32-installs when the installation simh command file is run. The tapes are tar gzipped files that are extracted during the installation. Only the tape(s) required for the specific UTX or MPX installation are downloaded. A bootable disk is created in the dsk directory. This disk can then be booted and the installed operating system executed by using a second simh command file. See the README.md file in the install directory for a description of the available configurations.
The tests directory contains the SEL32 machine diagnostic command file and bootable tape. They are used by the simh makefile to test the SEL32 simulator after it built. All of the instruction set and operating modes are validated by the diagnostic. There is a pass/failure indication from the diagnostic. The command file sel32_test.ini is used by the makefile. The command file diag.ini can be run at any time by the user to rerun the diagnostics. There is an example of the initial configuration file (ICL) used by the diagnostic. The machine configuration is loaded by the diag or the UTX or MPX operating system at boot time. See the MPX manuals at bitsavers.org/pdf/sel/sel32_mpx for using MPX 1X or 3X.
#sel32_test.ini - diag.tap; type "../sel32_test.ini" or run from makefile. Auto run by sel32 makefile to validate build or can be run at any time to validate system functionality.
#diag.ini - diag.tap; type "../sel32 diag.ini" to run. This is the SEL32 memory diagnostic that validates the SEL32 instruction set and memory management sumulated hardware. Any errors are reported to the terminal. Different cpu models can be configured to test various cpu model features.
Available Level One Diagnostic boot tape in tests directory: diag.ini - command file to start diags. Type "../sel32 diag.ini" diag.tap - bootable level one diagnostic tape w/auto testing. Set cpu type to 32/27, 32/67, 32/87, 32/97, V6 or V9. All cpu models now run all diagnostics provided on the diagnostic tape. Running DEXP stand alone causes input to stop after a few characters are entered. More testing is still required.
CV.CSL - Firmware control diag. Disabled in auto testing.
CV.CP1 - CPU diag part 1 runs OK.
CV.CP2 - CPU diag part 2 runs OK.
CV.CP3 - CPU diag part 3 runs OK.
CV.EAD - Effective address diag runs OK.
CV.BRD - Base register instruction diag runs OK
Not supported on 32/27.
CV.INT - Interrupt diag runs OK.
CV.TRP - Traps diag runs OK.
CV.CMD - Cache/Shadow diag. Disabled in auto testing.
CN.MMM - Non virtual memory diag runs OK.
VM.MMM - Virtual memory diag for V6 & V9 runs OK.
CV.IPT - IPU trap diag. Disabled in auto testing.
CV.CSD - WCS read/write trap diag. Disabled in auto testing.
CV.CON - Operators Console runs all tests for all CPUs.
CV.DXP - Diagnostic executive for level 2 diags. OK in batch.
67.FPT - Level two floating point diag runs under DXP OK.
CV.ITD - Level two interval timer diag runs under DXP OK.
Set GPR[0] = 0xffffffff before booting from tape to disable the
auto test and go to the Diagnostic Overlay Loader (DOL>) prompt.
Testing is extremely difficult without any source for the
diagnostics. Updates to follow as tests are corrected.
Available tap tools in taptools directory: ./taptools - set of tools to work with .tap formatted tapes. Also tools to convert between MPX and UNIX file formats. See README file in the taptools directory and source for descriptions.
Other MPX versions support: I have recently received some old MPX 3.X save tapes. Using these I have been able to hand build a MPX3.6 SDT tape that can be used to install MPX3.6. Once installed, the system can be used to build a new user SDT tape and install it elsewhere. Both based and non-based O/S images can be created. More images for installation will be made available in the future as I work my way through the save tapes. I still do not have a master SDT tape for any of the MPX 1.X or MPX 3.X systems. I have a 1600/6250 BPI tape drive that can read 9 track tapes and convert them to .tap files. If you have a master SDT, I would be very thankfull. Please keep looking.
James C. Bevier 01/03/2023