bootldr

Operating System proof-of-concept

Main source files:

• bootldr/bl_boot.asm — OS loader, stage 1 (boot record)
• bootldr/bl_loader.asm — OS loader, stage 2 (loader)
• vkern/vkern.cpp — OS kernel

Hardware-related source files:

• bootldr/serial.inc — 16-bit Serial port routines
• bootldr/serial32.inc — 32-bit Serial port routines
• vkern/hw.c — Hardware abstraction library
• vkern/pic.cpp — Programmable Interrupt Controller
• vkern/rtc.cpp — Real-Time Clock
• vkern/serial.cpp — Serial port

Build/Run files:

• bootldr/nasm.exe — Netwide Assembler (not included)
• bootldr/asm_ldr1.bat — assemble stage 1 loader
• bootldr/asm_ldr2.bat — assemble stage 2 loader
• _vm_config.bat — set VirtualBox VM paths & configuration (not included)
• make_ldr1.bat — [re]build «stage 1 loader» image and update VM HDD image
• make_ldr2.bat — [re]build «stage 2 loader + kernel» image
• piper.exe — Debug Host app (using host OS pipe that is used by VM serial port)
• RUNvm.bat — run VM & Debug Host app