bios: stub calls interrupt number; simplified bios.ha main interface

Instead of having the bios.call stub calling a function, make it directly call an interrupt that is
changed dynamically by modifying the code at runtime.
Simplify the bios.ha interface and document it.

Next up: implementing a high level drive interface for the BIOS using BIOS interrupts

1 files changed, 9 insertions, 8 deletions

diff --git a/main.ha b/main.ha
index edd4607..e5b2e7c 100644
--- a/main.ha
+++ b/main.ha
@@ -1,22 +1,23 @@
 use vga;
 use term;
 use rt;
-use real;
+use bios;
+use bios::drive;
+use drive;
 
 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!");
+	term::print(&text, "hello hare world!\n");
 	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);
+	bios::regs.eax = 6 << 8 | 1;
+	bios::regs.ebx = 0x43 << 8;
+	bios::regs.ecx = 0;
+	bios::regs.edx = 5 << 8 | 5;
+	bios::call(0x10);
 };