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wfjm.w11/doc/w11a_simh_setup.md
2023-02-04 12:00:19 +01:00

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# SimH simulator setup
Sometimes it is good to compare the w11a behavior with the PDP-11 software
emulator from the SimH project. See [INSTALL_simh](INSTALL_simh.md) for
installation instructions and supported versions.
Under `$RETROBASE/tools/simh` two setup files are provided which configure
SimH to reflect the w11a setup as close as possible:
- `setup_w11a_min.scmd`
Very close to the current w11a state when it runs on an s3board
- processor: 11/70, no FPP, 1 Mbyte
- periphery: 2 DL11, LP11, RK11, PC11
- `setup_w11a_max.scmd`
Planned configuration for the w11a, in addition
- processor: 4 Mbyte memory (as on Nexys2, Nexys3,...)
- periphery: in addition DZ11, RL11/RL02, RK70/RP06, TM11/TU10
Startup scripts are provided with each oskit. They call the `w11a_max`
configuration, so will show in the emulator what w11a can do when
finished.
All examples below use the same basic setup
- set up vt100 emulator window for 1st and 2nd DL11
console_starter -s -d DL0 &
console_starter -s -d DL1 &
**Note**: the `-s` ensures that the port numbers used by SimH are taken!
- the simulator is usually started with `.scmd` command file, for
[oskits](../tools/oskit/README.md) for example with
cd $RETROBASE/tools/oskit/<oskit-name>
pdp11 <oskit-name>_boot.scmd