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board-VII.c
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board-VII.c
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// Copyright 2008-2010 Segher Boessenkool <[email protected]>
// Licensed under the terms of the GNU GPL, version 2
// http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
#include <stdlib.h>
#include <stdio.h>
#include "types.h"
#include "emu.h"
#include "platform.h"
#include "board.h"
static u32 current_bank = -1;
static int controller_should_be_rotated;
static void switch_bank(u32 bank)
{
if (bank == current_bank)
return;
current_bank = bank;
render_kill_cache();
read_rom(N_MEM*bank);
// memset(ever_ran_this, 0, N_MEM);
board->idle_pc = 0;
if (mem[0x19792] == 0x4311 && mem[0x19794] == 0x4e43) // VII bank 0
board->idle_pc = 0x19792;
if (mem[0x21653] == 0x4311 && mem[0x21655] == 0x4e43) // VII bank 2
board->idle_pc = 0x21653;
if (mem[0x42daa] == 0x4311 && mem[0x42dac] == 0x4e43) { // VC1
board->idle_pc = 0x42daa;
controller_should_be_rotated = 1;
//mem[0x38ecf] = 0; // no life lost in LP
//mem[0x38eb1] = mem[0xb8eb0]; // no upgrades lost in LP
}
if (mem[0x3ecb9] == 0x4311 && mem[0x3ecbb] == 0x4e43) { // VC2
board->idle_pc = 0x3ecb9;
controller_should_be_rotated = 1;
}
}
static void init(void)
{
switch_bank(0);
}
static u16 gpio(u32 n, u16 what, __unused u16 push, __unused u16 pull, __unused u16 special)
{
if (n == 1) {
debug("STORE %04x to port B\n", what);
u32 bank = ((what & 0x80) >> 7) | ((what & 0x20) >> 4);
switch_bank(bank);
debug("switched to bank %x\n", bank);
}
return what;
}
static void uart_send(__unused u8 x)
{
//debug("--- uart_send(%02x)\n", x);
}
static u32 controller_in_count;
static u8 controller_input[8];
static u8 uart_recv(void)
{
if (controller_in_count == 0) {
u8 buttons = 0;
if (controller_should_be_rotated) {
if (button_up)
buttons |= 0x08;
if (button_down)
buttons |= 0x04;
if (button_left)
buttons |= 0x01;
if (button_right)
buttons |= 0x02;
} else {
if (button_up)
buttons |= 0x01;
if (button_down)
buttons |= 0x02;
if (button_left)
buttons |= 0x04;
if (button_right)
buttons |= 0x08;
}
if (button_A)
buttons |= 0x10;
if (button_B)
buttons |= 0x20;
controller_input[0] = buttons;
u32 x = random() & 0x3ff;
u32 y = random() & 0x3ff;
u32 z = random() & 0x3ff;
controller_input[1] = x;
controller_input[2] = y;
controller_input[3] = z;
x >>= 8;
y >>= 8;
z >>= 8;
controller_input[4] = 0;
controller_input[5] = (z << 4) | (y << 2) | x;
controller_input[6] = 0xff;
controller_input[7] = 0;
controller_in_count = 8;
}
u8 x = controller_input[8 - controller_in_count];
controller_in_count--;
return x;
}
struct board board_VII = {
.use_centered_coors = 1,
.init = init,
.gpio = gpio,
.uart_send = uart_send,
.uart_recv = uart_recv
};