2 files changed, 23 insertions(+), 0 deletions(-)

M cmd/hdmg/main.ha
M dmg/mmu.ha

@@ 10,6 10,7 @@ use sdl2::{
 	SDL_RendererFlags,
 	SDL_WindowFlags
 };
+use unix::signal;
 
 def CLOCK_NANOHZ: i64 = dmg::CLOCK_HZ * 1000000;
 


@@ 21,6 22,8 @@ export type state = struct {
 	render: *sdl2::SDL_Renderer,
 };
 
+let gstate: *state = null: *state;
+
 export fn main() void = {
 	const file = os::open(os::args[1])!;
 	const cart = cart::load(file)!;


@@ 53,6 56,8 @@ export fn main() void = {
 		window = win,
 		render = render,
 	};
+	gstate = &state;
+	signal::handle(signal::SIGUSR1, &handle_usr1);
 
 	for (!state.quit) {
 		update(&state)!;


@@ 82,3 87,20 @@ fn draw(state: *state) (void | sdl2::error) = {
 	sdl2::SDL_RenderClear(state.render)?;
 	sdl2::SDL_RenderPresent(state.render);
 };
+
+fn handle_usr1(sig: int, info: *signal::siginfo, uctx: *void) void = {
+	fmt::errorfln("AF   {:04x}\tBC   {:04x}\tDE   {:04x}\tHL  {:04x}",
+		gstate.dmg.cpu.regs.AF,
+		gstate.dmg.cpu.regs.BC,
+		gstate.dmg.cpu.regs.DE,
+		gstate.dmg.cpu.regs.HL)!;
+	fmt::errorfln("PC   {:04x}\tSP   {:04x}",
+		gstate.dmg.cpu.regs.PC,
+		gstate.dmg.cpu.regs.SP)!;
+	fmt::errorfln("IME  {: 4x}\tIE   {: 4x}\tIF   {: 4x}",
+		gstate.dmg.cpu.int_ime,
+		gstate.dmg.cpu.int_ie,
+		gstate.dmg.cpu.int_if)!;
+	fmt::errorfln("HALT {: 4x}\tSTOP {: 4x}",
+		gstate.dmg.cpu.halt, gstate.dmg.cpu.stop)!;
+};

@@ 2,6 2,7 @@
 // or something. Dunno.
 use dmg::cart;
 use sm83;
+use fmt; // XXX TEMP
 
 export type mmu = struct {
 	sm83::mmu,