8ad60026fe
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22656 a1c6a512-1295-4272-9138-f99709370657
623 lines
18 KiB
C
623 lines
18 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Pacbox - a Pacman Emulator for Rockbox
|
|
*
|
|
* Based on PIE - Pacman Instructional Emulator
|
|
*
|
|
* Copyright (c) 1997-2003,2004 Alessandro Scotti
|
|
* http://www.ascotti.org/
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#include "arcade.h"
|
|
#include "hardware.h"
|
|
#include <string.h>
|
|
#include "plugin.h"
|
|
|
|
#ifndef HAVE_LCD_COLOR
|
|
/* Convert RGB888 to 2-bit greyscale - logic taken from bmp2rb.c */
|
|
static fb_data rgb_to_gray(unsigned int r, unsigned int g, unsigned int b)
|
|
{
|
|
int brightness = ( 2*r + 4*g + b );
|
|
if( r == 0 && g == 0 && b == 0 )
|
|
return 3;
|
|
|
|
brightness = (brightness/450);
|
|
if( brightness > 2 ) return 0;
|
|
else return 2-brightness;
|
|
}
|
|
#endif
|
|
|
|
unsigned char color_data_[256] = {
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x0b, 0x01,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x0b, 0x03,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x0b, 0x05,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x0b, 0x07,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x0b, 0x01, 0x09,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x0f, 0x00, 0x0e, 0x00, 0x01, 0x0c, 0x0f,
|
|
0x00, 0x0e, 0x00, 0x0b, 0x00, 0x0c, 0x0b, 0x0e,
|
|
0x00, 0x0c, 0x0f, 0x01, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x01, 0x02, 0x0f, 0x00, 0x07, 0x0c, 0x02,
|
|
0x00, 0x09, 0x06, 0x0f, 0x00, 0x0d, 0x0c, 0x0f,
|
|
0x00, 0x05, 0x03, 0x09, 0x00, 0x0f, 0x0b, 0x00,
|
|
0x00, 0x0e, 0x00, 0x0b, 0x00, 0x0e, 0x00, 0x0b,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x0e, 0x01,
|
|
0x00, 0x0f, 0x0b, 0x0e, 0x00, 0x0e, 0x00, 0x0f,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
|
};
|
|
|
|
unsigned char palette_data_[0x20] = {
|
|
0x00, 0x07, 0x66, 0xef, 0x00, 0xf8, 0xea, 0x6f,
|
|
0x00, 0x3f, 0x00, 0xc9, 0x38, 0xaa, 0xaf, 0xf6,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
|
};
|
|
|
|
enum {
|
|
Normal = 0x00,
|
|
FlipY = 0x01,
|
|
FlipX = 0x02,
|
|
FlipXY = 0x03
|
|
};
|
|
|
|
/* Putting this in IRAM actually slows down the iPods, but is good for
|
|
the Coldfire
|
|
*/
|
|
#ifdef CPU_COLDFIRE
|
|
fb_data palette[256] IBSS_ATTR; /* Color palette */
|
|
#else
|
|
fb_data palette[256]; /* Color palette */
|
|
#endif
|
|
|
|
|
|
void init_PacmanMachine(int dip)
|
|
{
|
|
int i;
|
|
|
|
/* Initialize the CPU and the RAM */
|
|
z80_reset();
|
|
rb->memset( &ram_[0x4000], 0xFF, 0x1000 );
|
|
|
|
/* Initialize parameters */
|
|
port1_ = 0xFF;
|
|
port2_ = 0xFF;
|
|
coin_counter_ = 0;
|
|
|
|
/* Reset the machine */
|
|
reset_PacmanMachine();
|
|
|
|
/* Set the DIP switches to a default configuration */
|
|
setDipSwitches( dip );
|
|
|
|
/* Initialize the video character translation tables: video memory has a
|
|
very peculiar arrangement in Pacman so we precompute a few tables to
|
|
move around faster */
|
|
|
|
for( i=0x000; i<0x400; i++ ) {
|
|
int x, y;
|
|
|
|
if( i < 0x040 ) {
|
|
x = 29 - (i & 0x1F);
|
|
y = 34 + (i >> 5);
|
|
}
|
|
else if( i >= 0x3C0 ) {
|
|
x = 29 - (i & 0x1F);
|
|
y = ((i-0x3C0) >> 5);
|
|
}
|
|
else {
|
|
x = 27 - ((i-0x40) >> 5);
|
|
y = 2 + ((i-0x40) & 0x1F);
|
|
}
|
|
if( (y >= 0) && (y < 36) && (x >= 0) && (x < 28) )
|
|
vchar_to_i_[i] = y*28 + x;
|
|
else
|
|
vchar_to_i_[i] = 0x3FF;
|
|
}
|
|
}
|
|
|
|
void reset_PacmanMachine(void)
|
|
{
|
|
int i;
|
|
|
|
z80_reset();
|
|
output_devices_ = 0;
|
|
interrupt_vector_ = 0;
|
|
|
|
rb->memset( ram_+0x4000, 0, 0x1000 );
|
|
rb->memset( color_mem_, 0, sizeof(color_mem_) );
|
|
rb->memset( video_mem_, 0, sizeof(video_mem_) );
|
|
rb->memset( dirty_, 0, sizeof(dirty_) );
|
|
|
|
for( i=0; i<8; i++ ) {
|
|
sprites_[i].color = 0;
|
|
sprites_[i].x = ScreenWidth;
|
|
}
|
|
}
|
|
|
|
/*
|
|
Run the machine for one frame.
|
|
*/
|
|
int run(void)
|
|
{
|
|
/* Run until the CPU has executed the number of cycles per frame
|
|
(the function returns the number of "extra" cycles spent by the
|
|
last instruction but that is not really important here) */
|
|
|
|
unsigned extraCycles = z80_run( CpuCyclesPerFrame );
|
|
|
|
/* Reset the CPU cycle counter to make sure it doesn't overflow,
|
|
also take into account the extra cycles from the previous run */
|
|
|
|
setCycles( extraCycles );
|
|
|
|
/* If interrupts are enabled, force a CPU interrupt with the vector
|
|
set by the program */
|
|
|
|
if( output_devices_ & InterruptEnabled ) {
|
|
z80_interrupt( interrupt_vector_ );
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/** Returns the status of the coin lockout door. */
|
|
unsigned char getCoinLockout(void) {
|
|
return output_devices_ & CoinLockout ? 1 : 0;
|
|
}
|
|
|
|
static void decodeCharByte( unsigned char b, unsigned char * charbuf, int charx, int chary, int charwidth )
|
|
{
|
|
int i;
|
|
|
|
for( i=3; i>=0; i-- ) {
|
|
charbuf[charx+(chary+i)*charwidth] = (b & 1) | ((b >> 3) & 2);
|
|
b >>= 1;
|
|
}
|
|
}
|
|
|
|
static void decodeCharLine( unsigned char * src, unsigned char * charbuf, int charx, int chary, int charwidth )
|
|
{
|
|
int x;
|
|
|
|
for( x=7; x>=0; x-- ) {
|
|
decodeCharByte( *src++, charbuf, x+charx, chary, charwidth );
|
|
}
|
|
}
|
|
|
|
static void decodeCharSet( unsigned char * mem, unsigned char * charset )
|
|
{
|
|
int i;
|
|
|
|
for( i=0; i<256; i++ ) {
|
|
unsigned char * src = mem + 16*i;
|
|
unsigned char * dst = charset + 64*i;
|
|
|
|
decodeCharLine( src, dst, 0, 4, 8 );
|
|
decodeCharLine( src+8, dst, 0, 0, 8 );
|
|
}
|
|
}
|
|
|
|
static void decodeSprites( unsigned char * mem, unsigned char * sprite_data )
|
|
{
|
|
int i;
|
|
|
|
for( i=0; i<64; i++ ) {
|
|
unsigned char * src = mem + i*64;
|
|
unsigned char * dst = sprite_data + 256*i;
|
|
|
|
decodeCharLine( src , dst, 8, 12, 16 );
|
|
decodeCharLine( src+ 8, dst, 8, 0, 16 );
|
|
decodeCharLine( src+16, dst, 8, 4, 16 );
|
|
decodeCharLine( src+24, dst, 8, 8, 16 );
|
|
decodeCharLine( src+32, dst, 0, 12, 16 );
|
|
decodeCharLine( src+40, dst, 0, 0, 16 );
|
|
decodeCharLine( src+48, dst, 0, 4, 16 );
|
|
decodeCharLine( src+56, dst, 0, 8, 16 );
|
|
}
|
|
}
|
|
|
|
/*
|
|
Decode one byte from the encoded color palette.
|
|
|
|
An encoded palette byte contains RGB information bit-packed as follows:
|
|
|
|
bit: 7 6 5 4 3 2 1 0
|
|
color: b b g g g r r r
|
|
*/
|
|
static unsigned decodePaletteByte( unsigned char value )
|
|
{
|
|
unsigned bit0, bit1, bit2;
|
|
unsigned red, green, blue;
|
|
|
|
bit0 = (value >> 0) & 0x01;
|
|
bit1 = (value >> 1) & 0x01;
|
|
bit2 = (value >> 2) & 0x01;
|
|
red = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
|
|
|
|
bit0 = (value >> 3) & 0x01;
|
|
bit1 = (value >> 4) & 0x01;
|
|
bit2 = (value >> 5) & 0x01;
|
|
green = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
|
|
|
|
bit0 = 0;
|
|
bit1 = (value >> 6) & 0x01;
|
|
bit2 = (value >> 7) & 0x01;
|
|
blue = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
|
|
|
|
return (blue << 16 ) | (green << 8) | red;
|
|
}
|
|
|
|
void decodeROMs(void)
|
|
{
|
|
unsigned decoded_palette[0x20];
|
|
unsigned c;
|
|
|
|
int i;
|
|
|
|
decodeCharSet( charset_rom_, charmap_ );
|
|
decodeSprites( spriteset_rom_, spritemap_ );
|
|
|
|
for( i=0x00; i<0x20; i++ ) {
|
|
decoded_palette[i] = decodePaletteByte( palette_data_[i] );
|
|
}
|
|
for( i=0; i<256; i++ ) {
|
|
c = decoded_palette[ color_data_[i] & 0x0F ];
|
|
#ifdef HAVE_LCD_COLOR
|
|
palette[i] = LCD_RGBPACK((unsigned char) (c),
|
|
(unsigned char) (c >> 8),
|
|
(unsigned char) (c >> 16));
|
|
#else
|
|
palette[i] = rgb_to_gray((unsigned char) (c),
|
|
(unsigned char) (c >> 8),
|
|
(unsigned char) (c >> 16) );
|
|
#endif
|
|
}
|
|
|
|
#if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
|
|
rb->lcd_pal256_update_pal(palette);
|
|
#endif
|
|
}
|
|
|
|
void getDeviceInfo( enum InputDevice device, unsigned char * mask, unsigned char ** port )
|
|
{
|
|
static unsigned char MaskInfo[] = {
|
|
0x01 , // Joy1_Up
|
|
0x02 , // Joy1_Left
|
|
0x04 , // Joy1_Right
|
|
0x08 , // Joy1_Down
|
|
0x10 , // Switch_RackAdvance
|
|
0x20 , // CoinSlot_1
|
|
0x40 , // CoinSlot_2
|
|
0x80 , // Switch_AddCredit
|
|
0x01 , // Joy2_Up
|
|
0x02 , // Joy2_Left
|
|
0x04 , // Joy2_Right
|
|
0x08 , // Joy2_Down
|
|
0x10 , // Switch_Test
|
|
0x20 , // Key_OnePlayer
|
|
0x40 , // Key_TwoPlayers
|
|
0x80 // Switch_CocktailMode
|
|
};
|
|
|
|
*mask = MaskInfo[device];
|
|
|
|
switch( device ) {
|
|
case Joy1_Up:
|
|
case Joy1_Left:
|
|
case Joy1_Right:
|
|
case Joy1_Down:
|
|
case Switch_RackAdvance:
|
|
case CoinSlot_1:
|
|
case CoinSlot_2:
|
|
case Switch_AddCredit:
|
|
*port = &port1_;
|
|
break;
|
|
case Joy2_Up:
|
|
case Joy2_Left:
|
|
case Joy2_Right:
|
|
case Joy2_Down:
|
|
case Switch_Test:
|
|
case Key_OnePlayer:
|
|
case Key_TwoPlayers:
|
|
case Switch_CocktailMode:
|
|
*port = &port2_;
|
|
break;
|
|
default:
|
|
*port = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
enum InputDeviceMode getDeviceMode( enum InputDevice device )
|
|
{
|
|
unsigned char mask;
|
|
unsigned char * port;
|
|
|
|
getDeviceInfo( device, &mask, &port );
|
|
|
|
return (*port & mask) == 0 ? DeviceOn : DeviceOff;
|
|
}
|
|
|
|
/*
|
|
Fire an input event, telling the emulator for example
|
|
that the joystick has been released from the down position.
|
|
*/
|
|
void setDeviceMode( enum InputDevice device, enum InputDeviceMode mode )
|
|
{
|
|
if( (getCoinLockout() == 0) && ((device == CoinSlot_1)||(device == CoinSlot_2)||(device == Switch_AddCredit)) ) {
|
|
// Coin slots are locked, ignore command and exit
|
|
return;
|
|
}
|
|
|
|
unsigned char mask;
|
|
unsigned char * port;
|
|
|
|
getDeviceInfo( device, &mask, &port );
|
|
|
|
if( mode == DeviceOn )
|
|
*port &= ~mask;
|
|
else if( mode == DeviceOff )
|
|
*port |= mask;
|
|
else if( mode == DeviceToggle )
|
|
*port ^= mask;
|
|
}
|
|
|
|
void setDipSwitches( unsigned value ) {
|
|
dip_switches_ = (unsigned char) value;
|
|
|
|
setDeviceMode( Switch_RackAdvance, value & DipRackAdvance_Auto ? DeviceOn : DeviceOff );
|
|
setDeviceMode( Switch_Test, value & DipMode_Test ? DeviceOn : DeviceOff );
|
|
setDeviceMode( Switch_CocktailMode, value & DipCabinet_Cocktail ? DeviceOn : DeviceOff );
|
|
}
|
|
|
|
unsigned getDipSwitches(void) {
|
|
unsigned result = dip_switches_;
|
|
|
|
if( getDeviceMode(Switch_RackAdvance) == DeviceOn ) result |= DipRackAdvance_Auto;
|
|
if( getDeviceMode(Switch_Test) == DeviceOn ) result |= DipMode_Test;
|
|
if( getDeviceMode(Switch_CocktailMode) == DeviceOn ) result |= DipCabinet_Cocktail;
|
|
|
|
return result;
|
|
}
|
|
|
|
#if defined (CPU_COLDFIRE)
|
|
extern void drawChar( unsigned char * buffer, int index, int ox, int oy, int color );
|
|
#else
|
|
static inline void drawChar( unsigned char * buffer, int index, int ox, int oy, int color )
|
|
{
|
|
int x,y;
|
|
|
|
/* Make the index point to the character offset into the character table */
|
|
unsigned char * chrmap = charmap_ + index*64;
|
|
buffer += ox + oy*224; /* Make the buffer point to the character position*/
|
|
color = (color & 0x3F)*4;
|
|
|
|
if( color == 0 )
|
|
{
|
|
for( y=7; y>=0; y-- )
|
|
{
|
|
rb->memset( buffer, 0, 8 );
|
|
buffer += ScreenWidth;
|
|
};
|
|
return;
|
|
};
|
|
|
|
if( output_devices_ & FlipScreen ) {
|
|
// Flip character
|
|
buffer += 7*ScreenWidth;
|
|
for( y=7; y>=0; y-- ) {
|
|
for( x=7; x>=0; x-- ) {
|
|
*buffer++ = (*chrmap++) + color;
|
|
}
|
|
buffer -= ScreenWidth + 8; // Go to the next line
|
|
}
|
|
}
|
|
else {
|
|
for( y=7; y>=0; y-- ) {
|
|
for( x=7; x>=0; x-- ) {
|
|
*buffer++ = (*chrmap++) + color;
|
|
}
|
|
buffer += ScreenWidth - 8; // Go to the next line
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
inline void drawSprite( unsigned char * buffer, int index )
|
|
{
|
|
struct PacmanSprite ps = sprites_[index];
|
|
int x,y;
|
|
char * s, * s2;
|
|
|
|
// Exit now if sprite not visible at all
|
|
if( (ps.color == 0) || (ps.x >= ScreenWidth) || (ps.y < 16) || (ps.y >= (ScreenHeight-32)) ) {
|
|
return;
|
|
}
|
|
|
|
// Clip the sprite coordinates to cut the parts that fall off the screen
|
|
int start_x = (ps.x < 0) ? 0 : ps.x;
|
|
int end_x = (ps.x < (ScreenWidth-16)) ? ps.x+15 : ScreenWidth-1;
|
|
|
|
// Prepare variables for drawing
|
|
int color = (ps.color & 0x3F)*4;
|
|
unsigned char * spritemap_base = spritemap_ + ((ps.n & 0x3F)*256);
|
|
|
|
buffer += ScreenWidth*ps.y;
|
|
|
|
dirty_[(start_x >> 3) + (ps.y >> 3)*28] = 1;
|
|
dirty_[(start_x >> 3) + 1 + (ps.y >> 3)*28] = 1;
|
|
dirty_[(end_x >> 3) + (ps.y >> 3)*28] = 1;
|
|
dirty_[(start_x >> 3) + ((ps.y >> 3)+1)*28] = 1;
|
|
dirty_[(start_x >> 3) + 1 + ((ps.y >> 3)+1)*28] = 1;
|
|
dirty_[(end_x >> 3) + ((ps.y >> 3)+1)*28] = 1;
|
|
dirty_[(start_x >> 3) + ((ps.y+15) >> 3)*28] = 1;
|
|
dirty_[(start_x >> 3) + 1 + ((ps.y+15) >> 3)*28] = 1;
|
|
dirty_[(end_x >> 3) + ((ps.y+15) >> 3)*28] = 1;
|
|
|
|
// Draw the 16x16 sprite
|
|
if( ps.mode == 0 ) { // Normal
|
|
s2 = spritemap_base + start_x-ps.x;
|
|
// Draw the 16x16 sprite
|
|
for( y=15; y>=0; y-- ) {
|
|
s = s2;
|
|
for( x=start_x; x<=end_x; x++, s++ ) {
|
|
if( *s ) {
|
|
buffer[x] = color + *s;
|
|
}
|
|
}
|
|
buffer += ScreenWidth;
|
|
s2 += 16;
|
|
}
|
|
} else if( ps.mode == 1 ) { // Flip Y
|
|
s2 = spritemap_base + start_x-ps.x + 240;
|
|
for( y=15; y>=0; y-- ) {
|
|
s = s2;
|
|
for( x=start_x; x<=end_x; x++, s++ ) {
|
|
if( *s ) {
|
|
buffer[x] = color + *s;
|
|
}
|
|
}
|
|
buffer += ScreenWidth;
|
|
s2 -= 16;
|
|
}
|
|
} else if( ps.mode == 2 ) { // Flip X
|
|
s2 = spritemap_base + 15 + ps.x-start_x;
|
|
for( y=15; y>=-0; y-- ) {
|
|
s = s2;
|
|
for( x=start_x; x<=end_x; x++, s-- ) {
|
|
if( *s ) {
|
|
buffer[x] = color + *s;
|
|
}
|
|
}
|
|
buffer += ScreenWidth;
|
|
s2 += 16;
|
|
}
|
|
} else { // Flip X and Y
|
|
s2 = spritemap_base + 255 + ps.x-start_x;
|
|
for( y=15; y>=0; y-- ) {
|
|
s = s2;
|
|
for( x=start_x; x<=end_x; x++, s-- ) {
|
|
if( *s ) {
|
|
buffer[x] = color + *s;
|
|
}
|
|
}
|
|
buffer += ScreenWidth;
|
|
s2 -= 16;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
Draw the video into the specified buffer.
|
|
*/
|
|
bool renderBackground( unsigned char * buffer )
|
|
{
|
|
unsigned char * video = video_mem_;
|
|
unsigned char * color = color_mem_;
|
|
unsigned char * dirty = dirty_;
|
|
int x,y;
|
|
bool changed=false;
|
|
|
|
// Draw the background first...
|
|
if( output_devices_ & FlipScreen ) {
|
|
for( y=ScreenHeight-CharHeight; y>=0; y-=CharHeight ) {
|
|
for( x=ScreenWidth-CharWidth; x>=0; x-=CharWidth ) {
|
|
if (*dirty) {
|
|
drawChar( buffer, *video++, x, y, *color++ );
|
|
*(dirty++)=0;
|
|
changed=true;
|
|
} else {
|
|
dirty++;
|
|
video++;
|
|
color++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
for( y=0; y<ScreenHeight; y+=CharHeight ) {
|
|
for( x=0; x<ScreenWidth; x+=CharWidth ) {
|
|
if (*dirty) {
|
|
drawChar( buffer, *video++, x, y, *color++ );
|
|
*(dirty++)=0;
|
|
changed=true;
|
|
} else {
|
|
dirty++;
|
|
video++;
|
|
color++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
void renderSprites( unsigned char * buffer )
|
|
{
|
|
int i;
|
|
|
|
// ...then add the sprites
|
|
for( i=7; i>=0; i-- ) {
|
|
drawSprite( buffer, i );
|
|
}
|
|
}
|
|
|
|
/* Enables/disables the speed hack. */
|
|
int setSpeedHack( int enabled )
|
|
{
|
|
int result = 0;
|
|
|
|
if( enabled ) {
|
|
if( (ram_[0x180B] == 0xBE) && (ram_[0x1FFD] == 0x00) ) {
|
|
// Patch the ROM to activate the speed hack
|
|
ram_[0x180B] = 0x01; // Activate speed hack
|
|
ram_[0x1FFD] = 0xBD; // Fix ROM checksum
|
|
|
|
result = 1;
|
|
}
|
|
}
|
|
else {
|
|
if( (ram_[0x180B] == 0x01) && (ram_[0x1FFD] == 0xBD) ) {
|
|
// Restore the patched ROM locations
|
|
ram_[0x180B] = 0xBE;
|
|
ram_[0x1FFD] = 0x00;
|
|
|
|
result = 1;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|