Video output on PDP-11/45 NG device (MIT LOGO)

[wboerhout]

I usually run my VAX and PDP machines on Debian Linux on hosts without graphical support ("Debian Lite")

However, to use MIT LOGO on a PDP-11/45 I need video support. The only system I have available is a Raspberry Pi 5 with Debian bookworm, with wayfire and a proper X11-server. This allows me to use DECwindows from my VAX/VMS machine. The DECwindows session manager and all applications run fine.

Now when I configure the NG device on a PDP-11/45 for use with MIT LOGO, the simulator issues the following errors after start:

error: XDG_RUNTIME_DIR is invalid or not set in the environment.
ALSA lib confmisc.c:855:(parse_card) cannot find card '0'
ALSA lib conf.c:5180:(_snd_config_evaluate) function snd_func_card_inum returned error: No such file or directory
ALSA lib confmisc.c:422:(snd_func_concat) error evaluating strings
ALSA lib conf.c:5180:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1334:(snd_func_refer) error evaluating name
ALSA lib conf.c:5180:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5703:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2666:(snd_pcm_open_noupdate) Unknown PCM default

I believe the issue is not with simh itself, but more about configuring the SDL-parameters in this new environment. Has anyone else tried this? Any idea how to troubleshoot?

Wilm

- #### the output of "sim> SHOW VERSION" while running the simulator which is having the issue

PDP-11 simulator Open SIMH V4.1-0 Current
    Simulator Framework Capabilities:
        32b data
        32b addresses
        Threaded Ethernet Packet transports:TAP:NAT:UDP
        Idle/Throttling support is available
        Virtual Hard Disk (VHD) support
        RAW disk and CD/DVD ROM support
        Asynchronous I/O support (Lock free asynchronous event queue)
        Asynchronous Clock support
        FrontPanel API Version 12
    Host Platform:
        Compiler: GCC 12.2.0
        Simulator Compiled as C (Release Build) on Nov 13 2024 at 12:07:54
        Build Tool: simh-makefile
        Memory Access: Little Endian
        Memory Pointer Size: 64 bits
        Large File (>2GB) support
        SDL Video support: SDL Version 2.26.5
        PCRE RegEx (Version 8.39 2016-06-14) support for EXPECT commands
        OS clock resolution: 1ms
        Time taken by msleep(1): 1ms
        OS: Linux raspi5 6.6.42-v8-16k+ #1787 SMP PREEMPT Thu Jul 25 17:45:51 BST 2024 aarch64 GNU/Linux
        Processor Name: Cortex-A76
        tar tool: tar (GNU tar) 1.34
        curl tool: curl 7.88.1 (aarch64-unknown-linux-gnu) libcurl/7.88.1 OpenSSL/3.0.15 zlib/1.2.13 brotli/1.0.9 zstd/1.5.4 libidn2/2.3.3 libpsl/0.21.2 (+libidn2/2.3.3) libssh2/1.10.0 nghttp2/1.52.0 librtmp/2.3 OpenLDAP/2.5.13
        git commit id: 2437b13f
        git commit time: 2024-09-04T20:10:48-0400

- #### how you built the simulator or that you're using prebuilt binaries

root@raspi5 /opt/open-simh # make pdp11
lib paths are: /lib/ /lib/aarch64-linux-gnu/ /lib/arm-linux-gnueabihf/ /usr/lib/aarch64-linux-gnu/libfakeroot/ /usr/lib/
include paths are:  /usr/lib/gcc/aarch64-linux-gnu/12/include /usr/local/include /usr/include/aarch64-linux-gnu /usr/include
using libm: /lib/aarch64-linux-gnu/libm.so
using librt: /lib/aarch64-linux-gnu/librt.a
using libpthread: /lib/aarch64-linux-gnu/libpthread.a /usr/include/pthread.h
using libpcre: /lib/aarch64-linux-gnu/libpcre.so /usr/include/pcre.h
using semaphore: /usr/include/semaphore.h
using libdl: /lib/aarch64-linux-gnu/libdl.a /usr/include/dlfcn.h
using zlib: /lib/aarch64-linux-gnu/libz.so /usr/include/zlib.h
using mman: /usr/include/aarch64-linux-gnu/sys/mman.h
using libSDL2: /usr/include/SDL2/SDL.h
*** No SDL ttf support available.  BESM-6 video panel disabled.
***
*** Info *** Install the development components of libSDL2-ttf
*** Info *** packaged for your Linux operating system distribution:
*** Info ***        $ sudo apt-get install libsdl2-ttf-dev
*** Warning ***
*** Warning *** pdp11 Simulator is being built WITHOUT
*** Warning *** libpcap networking support
*** Warning ***
*** Warning *** To build simulator(s) with libpcap networking support you
*** Warning *** should install the libpcap development components for
*** Warning *** for your Linux system:
*** Warning ***        $ sudo apt-get install libpcap-dev
*** Warning ***
*** Info ***
*** Info *** Simulators on your Linux platform can also be built with
*** Info *** extended LAN Ethernet networking support by using VDE Ethernet.
*** Info ***
*** Info *** To build simulator(s) with extended networking support you
*** Info *** should install the vde2 package to provide this
*** Info *** functionality for your Linux system:
*** Info ***        $ sudo apt-get install libvdeplug-dev
*** Info ***
***
*** pdp11 Simulator being built with:
*** - compiler optimizations and no debugging support. GCC Version: 12.2.0.
*** - Local LAN packet transports: TAP NAT(SLiRP)
*** - video capabilities provided by libSDL2 (Simple Directmedia Layer).
*** - Per simulator tests will be run.
***
*** git commit id is 2437b13fb1602416dda7886f2023ffdf1f175880.
*** git commit time is 2024-09-04T20:10:48-0400.
***
gcc -std=gnu99 -U__STRICT_ANSI__  -O2 -DNDEBUG=1 -finline-functions -fgcse-after-reload -fpredictive-commoning -fipa-cp-clone -fno-unsafe-loop-optimizations -fno-strict-overflow -DSIM_GIT_COMMIT_ID=2437b13fb1602416dda7886f2023ffdf1f175880 -DSIM_GIT_COMMIT_TIME=2024-09-04T20:10:48-0400  -DSIM_COMPILER="GCC Version: 12.2.0" -DSIM_BUILD_TOOL=simh-makefile -I . -Werror -D_GNU_SOURCE -DHAVE_PCRE_H -DHAVE_SEMAPHORE -DHAVE_SYS_IOCTL -DHAVE_LINUX_CDROM -DSIM_HAVE_DLOPEN=so -DHAVE_UTIME -DHAVE_ZLIB -DHAVE_GLOB -DHAVE_SHM_OPEN  ./PDP11/pdp11_fp.c ./PDP11/pdp11_cpu.c ./PDP11/pdp11_dz.c ./PDP11/pdp11_cis.c ./PDP11/pdp11_lp.c ./PDP11/pdp11_rk.c ./PDP11/pdp11_rl.c ./PDP11/pdp11_rp.c ./PDP11/pdp11_rx.c ./PDP11/pdp11_stddev.c ./PDP11/pdp11_sys.c ./PDP11/pdp11_tc.c ./PDP11/pdp11_tm.c ./PDP11/pdp11_ts.c ./PDP11/pdp11_io.c ./PDP11/pdp11_rq.c ./PDP11/pdp11_tq.c ./PDP11/pdp11_pclk.c ./PDP11/pdp11_ry.c ./PDP11/pdp11_pt.c ./PDP11/pdp11_hk.c ./PDP11/pdp11_xq.c ./PDP11/pdp11_xu.c ./PDP11/pdp11_vh.c ./PDP11/pdp11_rh.c ./PDP11/pdp11_tu.c ./PDP11/pdp11_cpumod.c ./PDP11/pdp11_cr.c ./PDP11/pdp11_rf.c ./PDP11/pdp11_dl.c ./PDP11/pdp11_ta.c ./PDP11/pdp11_rc.c ./PDP11/pdp11_kg.c ./PDP11/pdp11_ke.c ./PDP11/pdp11_dc.c ./PDP11/pdp11_dmc.c ./PDP11/pdp11_kmc.c ./PDP11/pdp11_dup.c ./PDP11/pdp11_rs.c ./PDP11/pdp11_vt.c ./PDP11/pdp11_td.c ./PDP11/pdp11_io_lib.c ./PDP11/pdp11_rom.c ./PDP11/pdp11_ch.c ./PDP11/pdp11_dh.c ./PDP11/pdp11_ng.c ./PDP11/pdp11_daz.c ./PDP11/pdp11_tv.c ./PDP11/pdp11_mb.c ./PDP11/pdp11_rr.c ./display/display.c ./display/sim_ws.c ./display/ng.c ./display/vt11.c ./scp.c ./sim_console.c ./sim_fio.c ./sim_timer.c ./sim_sock.c ./sim_tmxr.c ./sim_ether.c ./sim_tape.c ./sim_disk.c ./sim_serial.c ./sim_video.c ./sim_imd.c ./sim_card.c -DVM_PDP11 -I ./PDP11 -DHAVE_TAP_NETWORK -DUSE_NETWORK -Islirp -Islirp_glue -Islirp_glue/qemu -DHAVE_SLIRP_NETWORK -DUSE_SIMH_SLIRP_DEBUG slirp/*.c slirp_glue/*.c -DUSE_DISPLAY -DHAVE_LIBSDL -DUSE_SIM_VIDEO `sdl2-config --cflags` `sdl2-config --libs` -DUSE_READER_THREAD -DSIM_ASYNCH_IO -o BIN/pdp11 -lm -lrt -lpthread -lpcre -ldl -lz  
BIN/pdp11 RegisterSanityCheck  </dev/null 
 Running internal register sanity checks on PDP-11 simulator.
*** Good Registers in PDP-11 simulator.

- #### the simulator configuration file (or commands) which were used when the problem occurred.

set CPU 11/45 idle

set XQ disabled
set TM disabled
set TQ disabled
set RQ disabled
set LPT disable
set RL disabled
set RP disabled
set RL disabled
set RK disabled

set NG enabled
set NG type=LOGO
;boot NG

- #### the expected behavior and the actual behavior

The video window opens (in 512x512 size), but no output appears. On the simh console, after the LOGO '?' prompt, the STARTDISPLAY command is accepted, but no output appears (which seems logical after the error messages)