To use HDD: save hdd.img (from hdd.img.zip) to :\XT\hdd.img
To switch to USB-drives mode press: Enter + Backspace
- In the File Manager press "F10"
- To exit from the File Manager, use Ctrl + F10
To change overcloking: Left Ctrl + Tab + Numpad "+" or Numpad "-"
To use own FDD imgage, that will be shown as drive "B:", put fdd0.img file into :\XT\fdd01.img
Extra PSRAM support on pi pico pins:
- PSRAM_PIN_CS=18
- PSRAM_PIN_SCK=19
- PSRAM_PIN_MOSI=20
- PSRAM_PIN_MISO=21
To swap floppy drives A <-> B use: Left Ctrl + Tab + Backspace
- Or Enter + Backspace -> File Manager
- In the File Manager press "F9"
To turn on/off:
- Digital Sound Source on LPT1, use Ctrl + Tab + D. Default value - it is ON
- COVOX on LPT2, use Ctrl + Tab + C. Default value - it is ON
- Tandy 3-voices music device emulation, use Ctrl + Tab + T. Default value - it is ON
- Game Blaster (Creative Music System) device emulation, use Ctrl + Tab + G. Default value - it is OFF
- AdLib emulation, use Ctrl + Tab + A. Default value - it is OFF (experimental, not recomended)
- Whole sound emulation subsystem, use Ctrl + Tab + S. Default value - it is ON
- // Experimental: use before DOS (while BIOS test RAM)
- Extended Memory Manager (XMS), use Ctrl + Tab + X. Default value - it is OFF (have some issues with Wolf 3D)
- Expanded Memory Manager (EMS), use Ctrl + Tab + E. Default value - it is ON
- Upper Memory Blocks Manager (UMB), use Ctrl + Tab + U. Default value - it is ON
- Hight Memory Address Manager (HMA), use Ctrl + Tab + H. Default value - it is ON
- // TODO: save state to config file
To decrease or increase appropriated sound device volume, press Ctrl + related button and numpad "+" / "-", for example Ctrl + "D" + "-" will decrease DSS volume, Ctrl + "S" + "+" - increase whole sound system volume.
To swap DSS and Covox LPT1 and LPT2, use Ctrl + "D" + "C".
To get it working you should have an Murmulator (development) board with VGA output. Schematics available here at https://github.com/AlexEkb4ever/MURMULATOR_classical_scheme
