boot: longmode to realmode stub

This is the initial commit to the repo. It adds all the code.
The last proper thing that I got working before committing is
calling real mode functions from long mode using a stub.
Next up, I would like to implement a disk reader abstraction over
the BIOS in order to read form partitions (most notably FAT32).

1 files changed, 22 insertions, 0 deletions

diff --git a/main.ha b/main.ha
new file mode 100644
index 0000000..edd4607
--- /dev/null
+++ b/main.ha
@@ -0,0 +1,22 @@
+use vga;
+use term;
+use rt;
+use real;
+
+export fn main() void = {
+	let text = vga::attach(0xb8000, 80, 25);
+	term::clear(&text);
+	term::setcolors(&text, (term::color::LMAGENTA, term::color::BLACK));
+	
+	term::print(&text, "hello hare world!");
+	for (let i = 0z; i < 10; i += 1) {
+		term::print(&text, "a");
+		for (let j = 0z; j < 10000000; j += 1) {
+			yield;
+		};
+	};
+
+	real::regs.edi = 0;
+	real::regs.esi = 0x7c00;
+	real::call((&real::testt): uintptr: u16);
+};