Shift key function backwards on Imlac

[snhirsch]

• Context

When shift key is held down letters should present as uppercase when typed. Unfortunately, the terminal defaults to uppercase and changes to lowercase only when shift is held down.

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

  sim> show version
  Imlac simulator Open SIMH V4.1-0 Current
  Simulator Framework Capabilities:
      32b data
      32b addresses
      no Ethernet
      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 7.5.0
      Simulator Compiled as C arch: x64 (Release Build) on Aug 11 2024 at 20:05:01
      Build Tool: simh-makefile
      Memory Access: Little Endian
      Memory Pointer Size: 64 bits
      Large File (>2GB) support
      SDL Video support: SDL Version 2.0.8, PNG Version 1.6.34, zlib: 1.2.11
      PCRE RegEx (Version 8.39 2016-06-14) support for EXPECT commands
      OS clock resolution: 1ms
      Time taken by msleep(1): 1ms
      OS: Linux z87 4.15.0-227-generic #239-Ubuntu SMP Fri Jul 5 14:37:30 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
      Processor Name: Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz
      tar tool: tar (GNU tar) 1.29
      curl tool: curl 7.58.0 (x86_64-pc-linux-gnu) libcurl/7.58.0 OpenSSL/1.1.1 zlib/1.2.11 libidn2/2.0.4 libpsl/0.19.1 (+libidn2/2.0.4) nghttp2/1.30.0 librtmp/2.3
      git commit id: 8ed26d30+uncommitted-changes
      git commit time: 2024-07-14T19:14:21-0400

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

lib paths are: /lib/ /lib/i386-linux-gnu/ /lib/x86_64-linux-gnu/ /lib32/ /libx32/ /usr/lib/ /usr/lib/i386-linux-gnu/ /usr/lib/i386-linux-gnu/tls/ /usr/lib/x86_64-linux-gnu/ /usr/lib/x86_64-linux-gnu/libfakeroot/ /usr/lib/x86_64-linux-gnu/tls/ /usr/lib32/ /usr/lib64/digilent/adept/ /usr/libx32/ /usr/local/lib/
include paths are:  /usr/lib/gcc/x86_64-linux-gnu/7/include /usr/local/include /usr/lib/gcc/x86_64-linux-gnu/7/include-fixed /usr/include/x86_64-linux-gnu /usr/include
using libm: /usr/lib/i386-linux-gnu/libm.so
using librt: /usr/lib/i386-linux-gnu/librt.so
using libpthread: /usr/lib/i386-linux-gnu/libpthread.so /usr/include/pthread.h
using libpcre: /usr/lib/i386-linux-gnu/libpcre.so /usr/include/pcre.h
using semaphore: /usr/include/semaphore.h
using libdl: /usr/lib/i386-linux-gnu/libdl.so /usr/include/dlfcn.h
using libpng: /usr/lib/x86_64-linux-gnu/libpng.so /usr/include/png.h
using zlib: /usr/lib/i386-linux-gnu/libz.so /usr/include/zlib.h
using mman: /usr/include/x86_64-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
***
*** imlac Simulator being built with:
*** - compiler optimizations and no debugging support. GCC Version: 7.5.0.
*** - video capabilities provided by libSDL2 (Simple Directmedia Layer).
*** - Per simulator tests will be run.
***
*** git commit id is 8ed26d300baa5cc8624dc848069cbd1d1fb2aec7+uncommitted-changes.
*** git commit time is 2024-07-14T19:14:21-0400.
***
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=8ed26d300baa5cc8624dc848069cbd1d1fb2aec7+uncommitted-changes -DSIM_GIT_COMMIT_TIME=2024-07-14T19:14:21-0400  -DSIM_COMPILER="GCC Version: 7.5.0" -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_LIBPNG -DHAVE_ZLIB -DHAVE_GLOB -DHAVE_SHM_OPEN  ./imlac/imlac_sys.c ./imlac/imlac_cpu.c ./imlac/imlac_dp.c ./imlac/imlac_crt.c ./imlac/imlac_kbd.c ./imlac/imlac_tty.c ./imlac/imlac_pt.c ./imlac/imlac_bel.c ./display/display.c ./display/sim_ws.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 -I ./imlac -DUSE_DISPLAY -DHAVE_LIBSDL -DUSE_SIM_VIDEO `sdl2-config --cflags` `sdl2-config --libs`  -DUSE_READER_THREAD -DSIM_ASYNCH_IO -o BIN/imlac -lm -lrt -lpthread -lpcre -ldl -lpng -lz  
BIN/imlac RegisterSanityCheck  </dev/null 
 Running internal register sanity checks on Imlac simulator.
*** Good Registers in Imlac simulator.

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

attach -u tty 12345,connect=pidp-10.local:10016;notelnet
set rom type=stty
load -s ./ssv22.iml
reset
go

• the expected behavior and the actual behavior

  
  Letters should render in lowercase when shift is not down.  Instead they default to uppercase and change to lowercase only when shift is down.

The binary I build myself - and - the prepacked binary with pidp-10 (ARM64) both do this.

- #### you may also need to provide specific pointers to data files that may be necessary to demonstrate the problem

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[snhirsch]

Lars pointed me at the 'Break' key, which acts as a caps lock. All set now.