diff options
| -rw-r--r-- | 01_exercise/bootloader.c | 39 |
1 files changed, 36 insertions, 3 deletions
diff --git a/01_exercise/bootloader.c b/01_exercise/bootloader.c index bc7d807..afd4d96 100644 --- a/01_exercise/bootloader.c +++ b/01_exercise/bootloader.c @@ -60,9 +60,42 @@ void sleep(short ms) { } void main(void) { - print("Hello!"); - print("\n\r > "); + print("Hello!\n\r"); while (1) { - putc(getc()); + char buf[9]; + for (unsigned char i = 0; i < 8; i++) { + char c = getc(); + if (c == '\r') { + if (i == 0) { // empty entry + print("Reboot!"); + /*asm volatile( + "mov $0x5307, %%ax;" // TURN OFF SYSTEM: + // http://www.ctyme.com/intr/rb-1356.htm + "mov $0x0001, %%bx;" + "mov $0x0003, %%cx;" + "int $0x15" :: + : "ax", "bx", "cx");*/ + asm volatile("xor %%eax, %%eax\n" + "push %%eax\n" + "push %%ax\n" + "lidt (%%esp)\n" + "mov %%ss, %%eax" :: + : "eax"); + return; + } else { + break; + } + } + buf[i] = c; + putc('*'); + } + buf[8] = '\0'; + while (1) { + if (getc() == '\r') + break; + } + print("\n\r"); + print(buf); + print("\n\r"); } }
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