Joysticks can now be disabled individually
Added option to sync joysticks with cpu speed. Some games, like Pacman, require this to be off and CPU speed set to 7.16Mhz.
ROMs with specific names such as tandy.rom and pcxt.rom are no longer required in games/PCXT folder, but must initially be provided from the BIOS section of the OSD menu.
* 4.77Mhz CPU clock with 33% duty cycle, thanks to @MicroCoreLabs
* Peripheral clock now works at half cpu clock, for correct synchronisation with the 8253 timer, thanks to @kitune-san
* Turbo option is disabled for the moment, requires a redesign of the BIU... for the to-do list
* Added UART module from ao486 project (COM1 assigned to USER I/O pins)
* Automatic loading of the BIOS ROM from /games/PCXT directory
* BIOS ROM hot swapping from the OSD menu
* Updated the code to the latest version of the SDRAM module of KFPC-XT, but not yet implemented in the core... needs to be revised and improved, it does not work properly.
* Added Adlib FM (JTOPL2)
* Added SN76489AN (PCjr Sound)
* Change to alternative BIOS from PCXT version 0.9.8 developed by Sergey Kiselev, with OPL FM sound card detector
* Change to XTPC-XT. The use of MCL86 and Graphics Gremlin are maintained.
* Use of Sergey Kiselev's (@skiselev) XT 8088 project.
* Turbo mode enabled, 4.77Mhz or 7.16Mhz selectable from OSD.
* Scancodes SET 2, temporarily.
* Automation of the boot0.rom file generation with a python script, from the bios and optionally ibm basic via minuszerodegrees.net download.
For the keyboard to work, it must be configured with these options from the OSD for the time being:
1. Set CPU at 7.16Mhz
2. Disable IRQ0
* PIC module downgraded to the first versions of the Next186 project, more basic and without ISR
* Possibility to activate and deactivate IRQ0 from the OSD menu, temporary feature.
