Commodore PC 20-III emulator for the Linux terminal
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This emulator is specifically made to emulate one of the XT-compatible PCs from Commodore in a Linux terminal.
Features and notes:
This emulator is NOT cycle accurate! Hacks implemented to make things run.
Intel 8088 CPU almost fully emulated except LOCK, WAIT and ESC instructions.
Configured for 640K RAM, 2 floppy drives and CGA 80 column mode.
CGA screen buffer at 0xB8000 drawn through curses, with color.
ACS (Alternative Character Set) used for "graphical" CP437 characters.
XT keyboard scan codes converted from curses counterparts.
F11 mapped to "Left Alt" commonly used to to bring down menus programs.
F12 mapped to "Left Ctrl" + "Scroll Lock" for doing a break in BASIC.
MOS 5720 compatible mouse emulation, but only left and right mouse buttons.
Faraday FE2010 chipset emulated as needed.
OKI MSM6242 RTC emulated and routed to host system clock.
Standard Microsystems FDC 9268 floppy controller mostly emulated.
Basic read and write to floppies up to 2.88M.
Autodetect of sectors-per-track from floppy image boot sector.
Western Digital 93024-X 20 MB hard drive emulation, but read-only.
Hard disk image expects layout matching C/H/S values of 615/4/17.
Ctrl+C in the terminal breaks into a debugger for dumping data.
CPU trace enabled/disabled by compile time define flag.
Host CPU can be relaxed by intercepting int16h and waiting for stdin.
By default expects BIOS ROM: cbm-pc10sd-bios-v4.38-318085-05-C72A.bin
Booting from floppy disk image or hard disk image should work.
By default expects BIOS ROM: cbm-pc10sd-bios-v4.38-318085-05-C72A.bin
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