The stable version of the 86Box emulator has been updated to 4.2.1

Changelog
 Emulator
 - Fixed keyboard shortcuts for full screen mode when the Keyboard requires capture option is set

 Machines
 - Added video overscan delta option to the IBM PCjr (fixing the game on the screenshot above)  
 - Fixed some copy protected games on the IBM PCjr
 - Fixed CMOS password and other boot issues on the Radisys EPC-2102
 - Fixed PCI device IRQs on the A-Trend ATC6310BXII
 - Fixed on-board S3 ViRGE video on the Intel AP440FX
 - Fixed incorrect CPU speed reporting on the HP Vectra VL 5 Series 4
 - Fixed missing CPU selections on the DataExpert SX495
 - Fixed Genoa Unknown 486 extended memory support
 - Fixed Acer A1G hanging during POST with some CPUs 
 - Fixed Olivetti M19 display corruption in high resolution mode
 - Fixed IBM PCjr / Tandy 1000 family display corruption with some games
 - Fixed Tandy 1000 display corruption on soft reboot
 - Fixed IBM PCjr not rebooting on cartridge removal
 - Fixed IBM PCjr video type selection not working
 - Changed minimum RAM on the Tandy 1000 to 384 KB and on the Tandy 1000 HX to 256 KB
 - Changed Phoenix XT clone BIOS revision to a newer one
 - Renamed Tandy 1000 to the SX variant to better reflect its hardware and firmware
 
Hardware
 Core
 - Fixed 8087 FPU inaccuracy causing diagnostic test failures

 Display
 - Improved emulation performance of ATI Mach64 and S3 ViRGE cards
 - Added miroCRYSTAL 3D (S3 ViRGE) PCI video card
 - Fixed hard reset crashes with more video cards
 - Fixed Voodoo Banshee/3 crashing the emulator with banshee_do_screen_to_screen_blt: unknown srcFormat message on more full motion video applications
 - Fixed rendering issues with some drivers on S3 ViRGE and Trident TGUI cards
 - Fixed Diamond Stealth VRAM (S3 86C911) slowing emulation performance
 - Fixed hangs or display corruption with S3 cards on soft reboot
 - Fixed Compaq EGA display corruption in high resolution mode
 - Fixed Compaq EGA compatibility with non-Compaq machines
 - Fixed VGA color accuracy issue with some DOS games
 - Changed Diamond Stealth 3D 4000 (S3 ViRGE/GX2) video BIOS to a newer version
 
 Input
 - Added more model options to the 3M MicroTouch
 - Added crosshair cursor hiding option to the 3M MicroTouch
 - Fixed 3M MicroTouch not working with some drivers
 - Fixed keyboard controller inaccuracy causing keyboard lock-ups with some DOS applications
 - Fixed serial mouse crashing the emulator if attached to a non-existent serial port

 Sound
 - Fixed Aztech Sound Galaxy Pro 16 AB not working with some drivers
 - Fixed IBM PCjr / Tandy 1000 / TNDY sound issues with some games
 - Fixed MPU-401 playback issues with some games, particularly in intelligent mode
 - Renamed SB MIDI input option on Sound Blaster cards to DSP MIDI

 Network
 - Fixed modem crashing the emulator with Assertion failed! message under heavy Telnet traffic
 - Fixed modem autodetection taking too long on Windows 9x
 - Fixed modem SLIP not being reachable on some Windows configurations
 - Fixed loss of received packets on DEC and NE2000-based cards
 - Changed PLIP to require SLiRP mode like the modem
 
 Storage
 - Added generic AMD 53C974 card based on the PCscsi controller
 - Fixed dynamic VHD corruption with MFM/RLL controllers in specific cases
 - Fixed hanging issues with the Pro Audio Spectrum 16 SCSI controller
 - Fixed Tekram DC-390 not working with some drivers
 - Fixed WD MFM/RLL controllers not booting from hard disk when set to IRQ