the prex operating system, a multi-process operating system and rtos not like, and it uses a micro-kernel architecture.

prex-0.9.1
..........\bsp
..........\...\boot
..........\...\....\arm
..........\...\....\...\arch
..........\...\....\...\....\boot.ld
..........\...\....\...\....\elf_reloc.c
..........\...\....\...\....\head.S
..........\...\....\...\....\Makefile.inc
..........\...\....\...\gba
..........\...\....\...\...\debug.c
..........\...\....\...\...\head.S
..........\...\....\...\...\Makefile.inc
..........\...\....\...\...\startup.c
..........\...\....\...\integrator
..........\...\....\...\..........\debug.c
..........\...\....\...\..........\Makefile.inc
..........\...\....\...\..........\startup.c
..........\...\....\common
..........\...\....\......\bootinfo.c
..........\...\....\......\elf.c
..........\...\....\......\load.c
..........\...\....\......\main.c
..........\...\....\......\Makefile.inc
..........\...\....\......\printf.c
..........\...\....\......\splash.c
..........\...\....\......\string.c
..........\...\....\include
..........\...\....\.......\boot.h
..........\...\....\.......\elf_reloc.h
..........\...\....\.......\load.h
..........\...\....\.......\machdep.h
..........\...\....\Makefile
..........\...\....\ppc
..........\...\....\...\arch
..........\...\....\...\....\boot.ld
..........\...\....\...\....\elf_reloc.c
..........\...\....\...\....\Makefile.inc
..........\...\....\...\prep
..........\...\....\...\....\debug.c
..........\...\....\...\....\head.S
..........\...\....\...\....\Makefile.inc
..........\...\....\...\....\Makefile.sysgen
..........\...\....\...\....\startup.c
..........\...\....\...\tools
..........\...\....\...\.....\prepboot
..........\...\....\...\.....\........\bootsect.ld
..........\...\....\...\.....\........\bootsect.S
..........\...\....\...\.....\........\Makefile
..........\...\....\x86
..........\...\....\...\arch
..........\...\....\...\....\boot.ld
..........\...\....\...\....\elf_reloc.c
..........\...\....\...\....\Makefile.inc
..........\...\....\...\pc
..........\...\....\...\..\debug.c
..........\...\....\...\..\head.S
..........\...\....\...\..\Makefile.inc
..........\...\....\...\..\startup.c
..........\...\....\...\tools
..........\...\....\...\.....\bootsect
..........\...\....\...\.....\........\bootsect.ld
..........\...\....\...\.....\........\bootsect.S
..........\...\....\...\.....\........\Makefile
..........\...\drv
..........\...\...\arm
..........\...\...\...\arch
..........\...\...\...\....\driver.ld
..........\...\...\...\gba
..........\...\...\...\...\font.h
..........\...\...\...\...\kbd_img.h
..........\...\...\...\...\keymap.h
..........\...\...\...\...\keypad.c
..........\...\...\...\...\lcd.c
..........\...\...\...\...\lcd.h
..........\...\...\...\...\Makefile.inc
..........\...\...\...\...\swkbd.c
..........\...\...\...\...\swkbd.h
..........\...\...\...\include
..........\...\...\...\.......\busio.h
..........\...\...\...\.......\dkient.h
..........\...\...\dev
..........\...\...\...\base
..........\...\...\...\....\cons.c
..........\...\...\...\....\init.c
..........\...\...\...\....\kd.c
..........\...\...\...\....\main.c
..........\...\...\...\....\Makefile.inc
..........\...\...\...\....\pm.c
..........\...\...\...\....\tty.c
..........\...\...\...\....\wscons.c
..........\...\...\...\block
..........\...\...\...\.....\fdd.c
..........\...\...\...\.....\Makefile.inc
..........\...\...\...\.....\ramdisk.c
..........\...\...\...\cpufreq
..........\...\...\...\.......\cpufreq.c
..........\...\...\...\.......\est.c
..........\...\...\...\.......\Makefile.inc
..........\...\...\...\dma

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