Commit eb984159 authored by Fabien Freling's avatar Fabien Freling

Improve debug printing

parent b52a0700
......@@ -31,19 +31,21 @@ type t = {
}
let print_cpu_state cpu =
printf "Registers:\n";
printf " A: 0x%02X F: 0x%02X\n" (int_of_char cpu.reg.a) (int_of_char cpu.reg.f);
printf " B: 0x%02X C: 0x%02X\n" (int_of_char cpu.reg.b) (int_of_char cpu.reg.c);
printf " D: 0x%02X E: 0x%02X\n" (int_of_char cpu.reg.d) (int_of_char cpu.reg.e);
printf " H: 0x%02X L: 0x%02X\n" (int_of_char cpu.reg.h) (int_of_char cpu.reg.l);
printf " PC: 0x%04X\n" cpu.reg.pc;
printf " SP: 0x%04X\n" cpu.reg.sp;
printf "Flags:\n";
printf " Z: %b\n" cpu.flag.z;
printf " N: %b\n" cpu.flag.n;
printf " H: %b\n" cpu.flag.h;
printf " C: %b\n" cpu.flag.c
printf "[Cpu state] Registers:\n";
printf "[Cpu state] \tA: 0x%02X \tF: 0x%02X\n" (int_of_char cpu.reg.a) (int_of_char cpu.reg.f);
printf "[Cpu state] \tB: 0x%02X \tC: 0x%02X\n" (int_of_char cpu.reg.b) (int_of_char cpu.reg.c);
printf "[Cpu state] \tD: 0x%02X \tE: 0x%02X\n" (int_of_char cpu.reg.d) (int_of_char cpu.reg.e);
printf "[Cpu state] \tH: 0x%02X \tL: 0x%02X\n" (int_of_char cpu.reg.h) (int_of_char cpu.reg.l);
printf "[Cpu state] \tPC: 0x%04X\n" cpu.reg.pc;
printf "[Cpu state] \tSP: 0x%04X\n" cpu.reg.sp;
printf "[Cpu state] Flags:\n";
printf "[Cpu state] \t ZNHC\n";
let z = if cpu.flag.z then 1 else 0 in
let n = if cpu.flag.n then 1 else 0 in
let h = if cpu.flag.h then 1 else 0 in
let c = if cpu.flag.c then 1 else 0 in
printf "[Cpu state] \t[%d%d%d%d]\n" z n h c
(** http://bgb.bircd.org/pandocs.htm#powerupsequence *)
let init_registers =
......@@ -136,152 +138,176 @@ let run cpu (mem: Memory.map) =
print_cpu_state cpu;
let opcode = read_pc_byte cpu mem |> char_of_int in
(* Hexa.print_slice cartridge.full_rom cpu.reg.pc (cpu.reg.pc + 7); *)
match opcode with
let inst = match opcode with
(* 8-bit load *)
(* LD r,(HL) *)
| '\x7E' -> printf " LD \tA, (HL)\n";
| '\x7E' -> let inst = sprintf "LD \tA, (HL)" in
let hl = merge_bytes cpu.reg.l cpu.reg.h in
cpu.reg.a <- Memory.get mem hl;
inc_cycles cpu 8
inc_cycles cpu 8;
inst
| '\x36' -> let n = read_pc_byte cpu mem in
printf " LD \t(HL) 0x%02X\n" n;
let inst = sprintf "LD \t(HL) 0x%02X" n in
let hl = merge_bytes cpu.reg.l cpu.reg.h in
Memory.set mem hl (char_of_int n);
inc_cycles cpu 12
inc_cycles cpu 12;
inst
(* CPU control *)
| '\x00' -> printf " NOP\n";
inc_cycles cpu 4
| '\x00' -> let inst = sprintf "NOP" in
inc_cycles cpu 4;
inst
(* jump *)
| '\xC9' -> printf " RET\n";
| '\x20' -> let n = read_pc_byte cpu mem in
let inst = sprintf "JR \tNZ, 0x%02X" n in
if cpu.flag.z = false then
begin
inc_pc cpu (n - 1); inc_cycles cpu 12;
end else
inc_cycles cpu 8;
inst
| '\xC9' -> let inst = sprintf "RET" in
cpu.reg.pc <- pop_stack cpu mem;
inc_cycles cpu 16
inc_cycles cpu 16;
inst
| '\xC0' -> printf " RET \tNZ\n";
| '\xC0' -> let inst = sprintf "RET \tNZ" in
if cpu.flag.z = false then
begin
cpu.reg.pc <- pop_stack cpu mem;
inc_cycles cpu 20
inc_cycles cpu 20;
end else
inc_cycles cpu 8
inc_cycles cpu 8;
inst
| '\x03' -> printf " INC \tBC\n";
| '\x03' -> let inst = sprintf "INC \tBC" in
inc_BC cpu;
inc_cycles cpu 8
inc_cycles cpu 8;
inst
| '\x05' -> printf " DEC \tB\n";
| '\x05' -> let inst = sprintf "DEC \tB" in
let dec = int_of_char(cpu.reg.b) - 1 in
cpu.flag.z <- dec = 0;
cpu.flag.n <- true;
cpu.flag.h <- dec < 0;
cpu.reg.b <- char_of_int @@ if dec >= 0 then dec else 0;
inc_cycles cpu 4
inc_cycles cpu 4;
inst
| '\x06' -> let n = read_pc_byte cpu mem in
printf " LD \tB, 0x%02X\n" n;
let inst = sprintf "LD \tB, 0x%02X" n in
cpu.reg.b <- char_of_int n;
inc_cycles cpu 8
inc_cycles cpu 8;
inst
| '\x18' -> let n = read_pc_byte cpu mem in
printf " JP \t0x%02X\n" n;
inc_pc cpu (n - 1); inc_cycles cpu 12
| '\x20' -> let n = read_pc_byte cpu mem in
printf " JR \tNZ, 0x%02X\n" n;
if cpu.flag.z = false then
begin
inc_pc cpu (n - 1); inc_cycles cpu 12
end else
begin
inc_cycles cpu 8
end
let inst = sprintf "JP \t0x%02X" n in
inc_pc cpu (n - 1); inc_cycles cpu 12;
inst
| '\x21' -> let nn = read_pc_2bytes cpu mem in
printf " LD \tHL, 0x%04X\n" nn;
let inst = sprintf "LD \tHL, 0x%04X" nn in
let high, low = split_2B nn in
cpu.reg.h <- high;
cpu.reg.l <- low;
inc_cycles cpu 12
inc_cycles cpu 12;
inst
| '\x22' -> printf " LDI \t(HL), A\n";
| '\x22' -> let inst = sprintf "LDI \t(HL), A" in
let hl = merge_bytes cpu.reg.l cpu.reg.h in
Memory.set mem hl cpu.reg.a;
let high, low = split_2B (hl + 1) in
cpu.reg.h <- high;
cpu.reg.l <- low;
inc_cycles cpu 8
inc_cycles cpu 8;
inst
| '\x28' -> let n = read_pc_byte cpu mem in
printf " JR \tZ, 0x%02X\n" n;
let inst = sprintf "JR \tZ, 0x%02X" n in
if cpu.flag.z = true then
begin
inc_pc cpu (n - 1); inc_cycles cpu 12
inc_pc cpu (n - 1); inc_cycles cpu 12;
end else
begin
inc_cycles cpu 8
end
inc_cycles cpu 8;
inst
| '\x34' -> printf " INC \t(HL)\n";
| '\x34' -> let inst = sprintf "INC \t(HL)" in
let hl = merge_bytes cpu.reg.l cpu.reg.h in
let v = Memory.get mem hl |> int_of_char in
cpu.flag.z <- v + 1 = 0;
cpu.flag.n <- false;
cpu.flag.h <- v = 0b00001111;
Memory.set mem hl (char_of_int (v + 1));
inc_cycles cpu 12
inc_cycles cpu 12;
inst
| '\x3E' -> let n = read_pc_byte cpu mem in
printf " LD \tA, 0x%02X\n" n;
let inst = sprintf "LD \tA, 0x%02X" n in
cpu.reg.a <- char_of_int n;
inc_cycles cpu 8
inc_cycles cpu 8;
inst
| '\xAF' -> printf " XOR \tA, A\n";
| '\xAF' -> let inst = sprintf "XOR \tA, A" in
let int_A = int_of_char cpu.reg.a in
cpu.reg.a <- char_of_int @@ int_A lxor int_A;
inc_cycles cpu 4
inc_cycles cpu 4;
inst
| '\xC3' -> let addr = read_pc_2bytes cpu mem in
printf " JP \t0x%04X\n" addr;
cpu.reg.pc <- addr; inc_cycles cpu 16
let inst = sprintf "JP \t0x%04X" addr in
cpu.reg.pc <- addr; inc_cycles cpu 16;
inst
| '\xE0' -> let n = read_pc_byte cpu mem in
printf " LDH \t(0xFF%02X), A\n" n;
let inst = sprintf "LDH \t(0xFF%02X), A" n in
Memory.set mem (0xFF00 + n) cpu.reg.a;
inc_cycles cpu 12
inc_cycles cpu 12;
inst
| '\xEA' -> let addr = read_pc_2bytes cpu mem in
printf " LD \t(0X%04X), A\n" addr;
let inst = sprintf "LD \t(0X%04X), A" addr in
Memory.set mem addr cpu.reg.a;
inc_cycles cpu 16
inc_cycles cpu 16;
inst
| '\xF0' -> let n = read_pc_byte cpu mem in
printf " LDH \tA, (0xFF%02X)\n" n;
let inst = sprintf "LDH \tA, (0xFF%02X)" n in
cpu.reg.a <- Memory.get mem (0xFF00 + n);
inc_cycles cpu 12
inc_cycles cpu 12;
inst
| '\xF3' -> printf " DI\n";
| '\xF3' -> let inst = sprintf "DI" in
(* fixme *)
inc_cycles cpu 4
inc_cycles cpu 4;
inst
| '\xFE' -> let n = read_pc_byte cpu mem in
printf " CP \t0x%02X\n" n;
let inst = sprintf "CP \t0x%02X" n in
cmp_A cpu n;
inc_cycles cpu 8
inc_cycles cpu 8;
inst
| '\xFB' -> printf " EI\n";
| '\xFB' -> let inst = sprintf "EI" in
(* enable interrupts, IME=1 *)
inc_cycles cpu 4
inc_cycles cpu 4;
inst
| x -> eprintf "opcode 0x%02X\n" (int_of_char x);
eprintf "#cycles: %d\n" cpu.cycles;
failwith "Unimplemented opcode."
in
printf "[Instruction] %s\n" inst
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