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fixed bug with sound output, fixed vdp latency during VBLANK, improved SDL/DOS ports

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ekeeke31 2008-08-22 15:58:49 +00:00
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Gnomovision version 69, Copyright (C) 19yy name of author
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Yoyodyne, Inc., hereby disclaims all copyright interest in the program
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<signature of Ty Coon>, 1 April 1989
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This General Public License does not permit incorporating your program into
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Public License instead of this License.

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Introduction
Genesis Plus has reasonable speed, and very fast rendering. Here are some
details about porting it to another platform
Porting rules
- This program is released under the GPL, so please release the source
code for your derivative ports. Let me know if you need an alternative
to this.
- Do not change the name of the emulator. Something like 'Genesis Plus / MacOS'
is fine as it keeps the original name.
- Configure the CPU emulators for little or big-endian CPUs, and use the
ALIGN_LONG option to handle unaligned memory accesses if needed. E.g. if
the emulator crashes when a game scrolls horizontally, you need to enable
it.
Requirements
- At this time the 16-bit rendering code has been well tested and should
be used. There is code to support 8 through 32-bit displays, but I
haven't checked if it still works.
- Audio output, if enabled, uses stereo 16-bit samples.
Functions to use:
int load_rom(char *filename);
Loads a game which can be in BIN, SMD or ZIP formats. It returns zero if
an error has occured.
void system_init(void);
Initializes the virtual Genesis console. Call this once during startup.
void audio_init(int rate);
Initialize the sound emulation part of the emulator. Pass zero or don't
call the function to disable sound. Call this after running system_init().
void system_reset(void);
Resets the virtual Genesis console. Call this once during setup, and later
as needed.
int system_frame(int skip);
Updates the emulation for a frame. Pass 1 to prevent rendering (which can
be used for frame skipping) and 0 to render the current display.
This function returns 0 if the virtual Genesis console has locked up.
You can do what you'd like with this information, such as notify the user,
reset the machine, etc.
If audio is enabled, the snd.buffer[] array will hold the current audio
data for this frame.
void system_shutdown(void);
Shuts down the emulator.
Variables:
The 'bitmap' structure needs to be filled out prior to calling system_init().
This provides the rendering code with information about the type of bitmap
it is rendering to. I would advise sticking with a 1024x512 16-bit bitmap:
memset(&bitmap, 0, sizeof(t_bitmap));
bitmap.width = 1024;
bitmap.height = 512;
bitmap.depth = 16;
bitmap.granularity = 2; /* Bytes per pixel */
bitmap.pitch = (bitmap.width * bitmap.granularity);
bitmap.data = (unsigned char *)bmp->pixels; /* Pointer to your bitmap */
bitmap.viewport.w = 256; /* Initial size of display on power-up (do not change) */
bitmap.viewport.h = 224;
bitmap.viewport.x = 0x20; /* Offset used for rendering (do not change) */
bitmap.viewport.y = 0x00;
bitmap.remap = 1;
The variable 'input.pad[0]' holds the button states for the first player
gamepad. Update this prior to calling system_frame(), and use the bitmasks
defined in system.h such as 'INPUT_UP', etc.
See the Windows/SDL and DOS drivers for examples.

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source/ngc/config.c
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@ -4,7 +4,7 @@
#include <fat.h>
#include <sys/dir.h>
#define CONFIG_VERSION "GENPLUS 1.2.1 "
#define CONFIG_VERSION "GENPLUS 1.2.2 "
t_config config;
@ -54,6 +54,7 @@ void set_config_defaults(void)
config.fm_preamp = 1.0;
config.boost = 1;
config.hq_fm = 1;
config.filter = 1;
config.fm_core = 0;
/* system options */

1
source/ngc/config.h
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@ -14,6 +14,7 @@ typedef struct
uint8 boost;
uint8 filter;
uint8 hq_fm;
uint8 filter;
uint8 fm_core;
int8 sram_auto;
int8 freeze_auto;

27
source/ngc/gui/menu.c
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@ -134,8 +134,8 @@ void soundmenu ()
int ret;
int quit = 0;
int prevmenu = menu;
int count = 5;
char items[5][20];
int count = 6;
char items[6][20];
strcpy (menutitle, "Press B to return");
@ -145,24 +145,25 @@ void soundmenu ()
sprintf (items[0], "PSG Volume: %1.2f", config.psg_preamp);
sprintf (items[1], "FM Volume: %1.2f", config.fm_preamp);
sprintf (items[2], "Volume Boost: %dX", config.boost);
if (config.hq_fm == 0) sprintf (items[3], "HQ YM2612: OFF");
sprintf (items[3], "LowPass Filter: %s", config.filter ? " ON":"OFF");
if (config.hq_fm == 0) sprintf (items[4], "HQ YM2612: OFF");
else if (config.fm_core)
{
/* GENS core only got linear resampling */
sprintf (items[3], "HQ YM2612: LINEAR");
sprintf (items[4], "HQ YM2612: LINEAR");
}
else
{
/* MAME core uses libsamplerate */
if (config.hq_fm == 1) sprintf (items[3], "HQ YM2612: LINEAR");
else if (config.hq_fm == 2) sprintf (items[3], "HQ YM2612: LOW");
else if (config.hq_fm == 3) sprintf (items[3], "HQ YM2612: FAST");
else if (config.hq_fm == 4) sprintf (items[3], "HQ YM2612: MEDIUM");
if (config.hq_fm == 1) sprintf (items[4], "HQ YM2612: LINEAR");
else if (config.hq_fm == 2) sprintf (items[4], "HQ YM2612: LOW");
else if (config.hq_fm == 3) sprintf (items[4], "HQ YM2612: FAST");
else if (config.hq_fm == 4) sprintf (items[4], "HQ YM2612: MEDIUM");
#ifdef USE_SINC_BEST
else if (config.hq_fm == 5) sprintf (items[3], "HQ YM2612: BEST");
else if (config.hq_fm == 5) sprintf (items[4], "HQ YM2612: BEST");
#endif
}
sprintf (items[4], "FM core: %s", config.fm_core ? "GENS" : "MAME");
sprintf (items[5], "FM core: %s", config.fm_core ? "GENS" : "MAME");
ret = domenu (&items[0], count, 1);
switch (ret)
@ -189,6 +190,10 @@ void soundmenu ()
break;
case 3:
config.filter ^= 1;
break;
case 4:
#ifdef USE_SINC_BEST
config.hq_fm = (config.hq_fm + 1) % (config.fm_core ? 2 : 6);
#else
@ -201,7 +206,7 @@ void soundmenu ()
}
break;
case 4:
case 5:
config.fm_core ^= 1;
config.psg_preamp = config.fm_core ? 2.5 : 1.5;
config.fm_preamp = 1.0;

10
source/system.c
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@ -177,7 +177,11 @@ int system_frame (int do_skip)
/* increment frame counter */
frame_cnt ++;
if (!gen_running) return 0;
if (!gen_running)
{
update_input();
return 0;
}
/* Clear VBLANK & DMA BUSY flags */
status &= 0xFFF5;
@ -367,8 +371,8 @@ static void audio_update (void)
}
/* boost volume if asked*/
l = ll * boost;
r = rr * boost;
l = l * boost;
r = r * boost;
/* clipping */
if (l > 32767) l = 32767;

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[05/25/03]
- Fixed a typo that made Z80 banked access to the VDP registers always fail.
[05/17/03]
- Modified the rendering code to handle unaligned longword access to memory.
[04/20/03]
- Modified 68000 emulator to prevent 'tas.b $mem' from writing data back
after a read (fixes Gargoyles).
- Fixed bug in 68000 emulator to swap order of words written for address
register indirect pre-decremented writes (fixes Jim Power graphics).
- Added support for 240-line displays (for Super Skidmarks).
- Rewrote part of the interrupt handling (fixes some raster effects).
- Removed sprite collision detection code (never really worked).
- Optimized sprite rendering inner loop.
[04/13/03]
- Finished up memory map for VDP DMA V-bus reads.
- Fixed handling of 68000 writes to I/O chip at even addresses.
- Fixed bit 7 handling of control register in I/O chip.
- Finished up Z80 memory map.
- Added code to handle Genesis hardware lock-ups.
- Removed some faulty code from the 68000 memory map handlers.
[03/22/03]
- Completed implementation of Z80 banked memory handlers.

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----------------------------------------------------------------------------
Genesis Plus
----------------------------------------------------------------------------
Version 1.2a
by Charles Mac Donald
WWW: http://cgfm2.emuviews.com
What's New
----------
[06/22/03]
- Modified rendering code for portability
- Modified memory handling to fix banked PSG access
[05/13/03]
- Initial release
Usage
-----
The Windows version runs windowed in a 16-bit desktop with NO sound or
joystick support.
The DOS version has most of the functionality from SMS Plus, such
as audio, joysticks, etc.
Windows/DOS controls:
Arrow Keys - Directional pad
A,S,D,F - 1P gamepad, buttons A, B, C, Start
Tab - Reset
Esc - Exit program
DOS only:
End - Exit program
F1-F4 - Set frameskip level (F1 = no skip ... F4 = skip 3 frames)
F8 - Make PCX screen snapshot
F9 - Toggle VSync
F10 - Toggle speed throttling
F11 - Toggle FPS meter
DOS details:
You can only support a second player if you are using a joystick driver
that supports more than one joystick. (e.g. Sidewinder, dual pads, etc.)
Type 'gen -help' on the command line for a list of useful options.
-res <x> <y> set the display resolution.
-vdriver <n> specify video driver.
-depth <n> specify color depth. (8, 16)
-scanlines use scanlines effect.
-scale scale display to full resolution. (slow)
-vsync wait for vertical sync before blitting.
-sound enable sound. (force speed throttling)
-sndrate <n> specify sound rate. (8000, 11025, 22050, 44100)
-sndcard <n> specify sound card. (0-7)
-swap swap left and right stereo output.
-joy <s> specify joystick type.
Here is a list of all the video drivers you can pass as a parameter
to the '-vdriver' option:
auto, safe, vga, modex, vesa2l, vesa3, vbeaf
Here is a list of all the joystick drivers you can pass as a parameter
to the '-joy' option:
auto, none, standard, 2pads, 4button, 6button, 8button, fspro, wingex,
sidewinder, gamepadpro, grip, grip4, sneslpt1, sneslpt2, sneslpt3,
psxlpt1, psxlpt2, psxlpt3, n64lpt1, n64lpt2, n64lpt3, db9lpt1, db9lpt2,
db9lpt3, tglpt1, tglpt2, tglpt3, wingwar, segaisa, segapci, segapci2
You can put any commandline option into a plain text file which should
be called "gen.cfg". Put one option per line, please. Command line options
will override anything in the configuration file.
Currently the zip loading code can manage a zipfile where the game
image is the first thing in it. If you try to open a huge archive of
games, only the first will be played.
Credits and Acknowlegements
---------------------------
I would like to thank Omar Cornut, Christian Schiller, and Chris MacDonald
for their invaluable help and support with this project.
Richard Bannister for the Macintosh port and all of the code fixes and
suggestions that have made Genesis Plus a better program.
(http://www.bannister.org)
The Genesis emulator authors: Bart Trzynadlowski, Quintesson, Steve Snake,
James Ponder, Stef, Gerrie, Sardu.
The regular people and many lurkers at segadev.
The MAME team for the CPU and sound chip emulators.
Everyone who has contributed, donated, and submitted information to help
out Genesis Plus and my efforts documenting the Genesis hardware.
Contact
-------
Charles MacDonald
E-mail: cgfm2@hotmail.com
WWW: http://cgfm2.emuviews.com
Legal
-----
Copyright (C) 1999, 2000, 2001, 2002, 2003 Charles MacDonald
The source code is distributed under the terms of the GNU General Public
License.
The Z80 CPU emulator, 68K CPU emulator, and the PSG, YM2612 emulation code
are taken from the MAME project, and terms of their use are covered under
the MAME license.
(http://www.mame.net)

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@ -0,0 +1,79 @@
Here are some technical details about things that need to be fixed or
added to Genesis Plus.
Missing features:
- Support for 6-button controllers
- SRAM management
- Game Genie / PAR patch codes
The VDP code could use a lot of cleaning up.
The rendering code is missing a few bits:
- Sprite collision
- Window bug
I think the "C" 68000 emulator either has some bugs or I'm not using it
correctly. Older DOS-only versions used Turbo68K, which had ran games
much better, especially with regards to interrupt handling.
Things that need to be fixed:
- Raster garbage on third road in Thunder Blade.
- Added country codes for Dragon Slayer, but game locks up after
passing country check.
- No inputs in Samurai Shodown.
(This game doesn't initialize the port direction registers, at least not
directly. Emulation bug or problem with the game?)
- Palette and raster problems in Mortal Kombat.
- Bad raster effects and VRAM corruption in Super Skidmarks.
(Needs PAL timing)
- Palette problems in Sonic 2 title screen.
- Masked half of Sonic sprite visible on Sonic title screen.
- Sprite masking doesn't work in Micro Machines subscreen.
- Music has slow tempo in Batman & Robin. (doesn't seem to be a problem
with the YM2612 timers - Wonderboy 3 is normal)
- Music has jerky playback in Sonic 2, 3, 3D Blast. If you run the Z80
emulation for one scanline after requesting an interrupt, it runs fine.
- DAC and PSG output are too loud, both are divided by two for now
(though the PSG should be a bit quieter and the DAC a bit louder)
- Undead Line locks after selecting a stage, also the Z80 sound halts
after the first note is played.
This game single steps the Z80 with the following code:
MOVEM.L D0,-(A7) ; 009C7C 48 E7 80 00
ORI #$0200,SR ; 009C80 00 7C 02 00
; Get control of the Z-bus
MOVE.W #$0100,$00A11100 ; 009C84 33 FC 01 00 00 A1 11 00
BTST #$00,$00A11100 ; 009C8C 08 39 00 00 00 A1 11 00
BNE.S *-$08 [00009C8C] ; 009C94 66 F6
; Check driver status byte. If zero, release bus and exit.
TST.B $00A00008 ; 009C96 4A 39 00 A0 00 08
BEQ *+$0016 [00009CB2] ; 009C9C 67 00 00 14
; Release bus and wait for Z80 to resume control. Then restart the loop
; and immediately get the bus back again, assuming the Z80 ran at least
; one instruction in the meantime.
CLR.W $00A11100 ; 009CA0 42 79 00 A1 11 00
BTST #$00,$00A11100 ; 009CA6 08 39 00 00 00 A1 11 00
BEQ.S *-$08 [00009CA6] ; 009CAE 67 F6
BRA.S *-$2C [00009C84] ; 009CB0 60 D2
; Release bus and exit.
CLR.W $00A11100 ; 009CB2 42 79 00 A1 11 00
ANDI #$FDFF,SR ; 009CB8 02 7C FD FF
MOVEM.L (A7)+,D0 ; 009CBC 4C DF 00 01
RTS ; 009CC0 4E 75

20
source/unused/dos/Makefile
View File

@ -12,20 +12,20 @@
CC = gcc
AS = nasm -f coff
LDFLAGS =
FLAGS = -I. -I.. -I../cpu -I../m68k -I../dos -I../sound -I../sound/SRC -I../cart_hw -I../cart_hw/svp \
-Wall -g \
-O6 -march=i686 -fomit-frame-pointer \
-DLSB_FIRST -DX86_ASM -DDOS
FLAGS = -I. -I.. -I../z80 -I../m68k -I../dos -I../sound -I../sound/SRC -I../cart_hw -I../cart_hw/svp \
-Wall -g \
-O6 -march=i686 -fomit-frame-pointer \
-DLSB_FIRST -DX86_ASM -DDOS
LIBS = -lalleg -laudio -lz -lm
OBJ = obj/z80.o
OBJ = obj/z80.o
OBJ += obj/m68kcpu.o \
OBJ += obj/m68kcpu.o \
obj/m68kops.o
OBJ += obj/genesis.o \
OBJ += obj/genesis.o \
obj/vdp.o \
obj/render.o \
obj/system.o \
@ -37,7 +37,7 @@ OBJ += obj/genesis.o \
obj/memvdp.o \
obj/state.o
OBJ += obj/sound.o \
OBJ += obj/sound.o \
obj/fm.o \
obj/sn76489.o \
obj/ym2612.o
@ -48,7 +48,7 @@ OBJ += obj/samplerate.o \
obj/src_sinc.o \
obj/src_zoh.o \
OBJ += obj/sram.o \
OBJ += obj/sram.o \
obj/eeprom.o \
obj/svp.o \
obj/ssp16.o \
@ -94,7 +94,7 @@ obj/%.o : ../cart_hw/svp/%.c
obj/%.o : ../cart_hw/svp/%.c ../cart_hw/svp/%.h
$(CC) -c $< -o $@ $(FLAGS)
obj/%.o : ../cpu/%.c ../cpu/%.h
obj/%.o : ../z80/%.c ../z80/%.h
$(CC) -c $< -o $@ $(FLAGS)
obj/%.o : ../m68k/%.c ../m68k/%.h

85
source/unused/dos/dos.c
View File

@ -75,13 +75,6 @@ int main (int argc, char *argv[])
return (0);
}
/* load SRAM */
FILE *f = fopen("./game.srm", "rb");
if (f!=NULL)
{
fread(&sram.sram,0x10000,1, f);
fclose(f);
}
/* load BIOS */
memset(bios_rom, 0, sizeof(bios_rom));
@ -117,6 +110,15 @@ int main (int argc, char *argv[])
memset (snd.buffer[1], 0, buf_len/2);
system_init();
audio_init(option.sndrate);
f = fopen("./game.srm", "rb");
if (f!=NULL)
{
fread(&sram.sram,0x10000,1, f);
fclose(f);
}
system_reset();
/* emulation loop */
@ -146,7 +148,7 @@ int main (int argc, char *argv[])
fclose(f);
}
trash_machine();
trash_machine();
system_shutdown();
error_shutdown();
return (0);
@ -184,11 +186,6 @@ int save_file(char *filename, char *buf, int size)
}
static int joynum = 0;
uint8 delay = 36;
int gun_offset = 0;
int old_mouse_x = 0;
int old_mouse_y = 0;
void dos_update_input(void)
{
@ -205,11 +202,6 @@ void dos_update_input(void)
if (joynum > MAX_DEVICES - 1) joynum = 0;
}
if(check_key(KEY_F12))
{
input.x_offset ++;
if (input.x_offset > 0xff) input.x_offset = 0;
}
if(check_key(KEY_F11))
{
@ -270,30 +262,26 @@ void dos_update_input(void)
if(joy[1].button[7].b) input.pad[1] |= INPUT_MODE;
}
}
if(key[KEY_Z]) input.pad[joynum] |= INPUT_X;
if(key[KEY_X]) input.pad[joynum] |= INPUT_Y;
if(key[KEY_C]) input.pad[joynum] |= INPUT_Z;
if(key[KEY_V]) input.pad[joynum] |= INPUT_MODE;
/* keyboard */
if(key[KEY_UP]) input.pad[joynum] |= INPUT_UP;
else
if(key[KEY_DOWN]) input.pad[joynum] |= INPUT_DOWN;
if(key[KEY_LEFT]) input.pad[joynum] |= INPUT_LEFT;
else
if(key[KEY_RIGHT]) input.pad[joynum] |= INPUT_RIGHT;
if(check_key(KEY_A)) error("ButtonA pressed\n");
if(key[KEY_A]) {
input.pad[joynum] |= INPUT_A;
}
if(key[KEY_A]) input.pad[joynum] |= INPUT_A;
if(key[KEY_S]) input.pad[joynum] |= INPUT_B;
if(key[KEY_D]) input.pad[joynum] |= INPUT_C;
if(check_key(KEY_F)) error("start pressed\n");
if(key[KEY_F]) {
if(key[KEY_Z]) input.pad[joynum] |= INPUT_X;
if(key[KEY_X]) input.pad[joynum] |= INPUT_Y;
if(key[KEY_C]) input.pad[joynum] |= INPUT_Z;
if(key[KEY_V]) input.pad[joynum] |= INPUT_MODE;
input.pad[joynum] |= INPUT_START;
}
if(key[KEY_F]) input.pad[joynum] |= INPUT_START;
extern uint8 pico_current;
if (input.dev[joynum] == DEVICE_LIGHTGUN)
@ -302,17 +290,14 @@ void dos_update_input(void)
if(mouse_needs_poll() == TRUE)
poll_mouse();
/* Calculate X axis value */
input.analog[joynum-4][0] = (mouse_x * bitmap.viewport.w)/SCREEN_W;;
/* Calculate Y axis value */
input.analog[joynum-4][1] = (mouse_y * bitmap.viewport.h)/SCREEN_H;;
/* Calculate X Y axis values */
input.analog[joynum - 4][0] = (mouse_x * bitmap.viewport.w) / SCREEN_W;
input.analog[joynum - 4][1] = (mouse_y * bitmap.viewport.h) / SCREEN_H;
/* Map mouse buttons to player #1 inputs */
if(mouse_b & 4) input.pad[joynum] |= INPUT_C;
if(mouse_b & 2) input.pad[joynum] |= INPUT_B;
if(mouse_b & 1) input.pad[joynum] |= INPUT_A;
if(key[KEY_F]) input.pad[joynum] |= INPUT_START;
}
else if (input.dev[joynum] == DEVICE_MOUSE)
{
@ -320,16 +305,20 @@ void dos_update_input(void)
if(mouse_needs_poll() == TRUE)
poll_mouse();
/* Get X & Y quantity of movement */
get_mouse_mickeys(&input.analog[2][0], &input.analog[2][1]);
/* Sega Mouse range is -256;+256 */
input.analog[2][0] = (input.analog[2][0] * 256) / SCREEN_W;
input.analog[2][1] = (input.analog[2][1] * 256) / SCREEN_H;
if (config.invert_mouse) input.analog[2][1] = 0 - input.analog[2][1];
/* Vertical movement is upsidedown */
if (!config.invert_mouse) input.analog[2][1] = 0 - input.analog[2][1];
/* Map mouse buttons to player #1 inputs */
if(mouse_b & 4) input.pad[joynum] |= INPUT_C;
if(mouse_b & 1) input.pad[joynum] |= INPUT_B;
if(mouse_b & 2) input.pad[joynum] |= INPUT_A;
if(key[KEY_F]) input.pad[joynum] |= INPUT_START;
}
else if (system_hw == SYSTEM_PICO)
{
@ -337,11 +326,9 @@ void dos_update_input(void)
if(mouse_needs_poll() == TRUE)
poll_mouse();
/* Calculate X axis value */
input.analog[0][0] = 0x3c + (mouse_x * (0x17c - 0x3c + 1) / SCREEN_W);
/* Calculate Y axis value */
input.analog[0][1] = 0x1fc + (mouse_y* (0x3f3 - 0x1fc + 1) / SCREEN_H);
/* Calculate X Y axis values */
input.analog[0][0] = 0x3c + (mouse_x * (0x17c-0x03c+1)) / SCREEN_W;
input.analog[0][1] = 0x1fc + (mouse_y * (0x2f7-0x1fc+1)) / SCREEN_H;
/* Map mouse buttons to player #1 inputs */
if(mouse_b & 2) input.pad[0] |= INPUT_B;
@ -387,7 +374,7 @@ void dos_update_input(void)
/* reinitialize timings */
system_init ();
audio_init(48000);
audio_init(option.sndrate);
fm_restore();
/* reinitialize HVC tables */
@ -399,10 +386,10 @@ void dos_update_input(void)
bitmap.viewport.y = config.overscan ? (((reg[1] & 8) ? 0 : 8) + (vdp_pal ? 24 : 0)) : 0;
bitmap.viewport.changed = 1;
}
if(check_key(KEY_F10))
{
system_reset();
}
if(check_key(KEY_TAB)) set_softreset();
}
@ -516,7 +503,7 @@ void dos_update_video(void)
{
//blit(gen_bmp, screen, 0x0, 0, center_x, center_y, width, height);
stretch_blit(gen_bmp, screen, 0, 0, width, height, (SCREEN_W-352)/2, (SCREEN_H-240)/2, 352,240);
stretch_blit(gen_bmp, screen, 0, 0, width, height, (SCREEN_W-352)/2, (SCREEN_H-240)/2, 352,240 << (interlaced ? 1:0));
}
}

15
source/unused/dos/dos.h
View File

@ -20,21 +20,6 @@ int check_key(int code);
#define update_input() dos_update_input()
#define MAX_INPUTS 8
/* options */
extern uint8 overscan;
extern uint8 use_480i;
extern uint8 FM_GENS;
extern uint8 hq_fm;
extern uint8 ssg_enabled;
extern double psg_preamp;
extern double fm_preamp;
extern uint8 boost;
extern uint8 region_detect;
extern uint8 sys_type[2];
extern uint8 force_dtack;
extern uint8 dmatiming;
extern uint8 vdptiming;
extern uint8 debug_on;
extern uint8 log_error;

1
source/unused/dos/osd.h
View File

@ -18,4 +18,5 @@
#include "fileio.h"
volatile int frame_count;
#endif /* _OSD_H_ */

2
source/unused/dos/readme-djgpp.txt
View File

@ -1,3 +1,3 @@
To be compiled with DJGPP.
COmpile with DJGPP.
You will also need to install Allegro and Seal libraries.
Zlib is required for zipped rom support.

10
source/unused/win/Makefile
View File

@ -8,12 +8,12 @@
# LSB_FIRST : for little endian systems.
# X86_ASM : enable x86 assembly optimizations
NAME = gp_sdl
NAME = gp_sdl.exe
CC = gcc
CFLAGS = `sdl-config --cflags` -O6 -march=i686 -fomit-frame-pointer
DEFINES = -DLSB_FIRST -DX86_ASM
INCLUDES = -I. -I.. -I../cpu -I../m68k -I../dos -I../sound -I../sound/SRC -I../cart_hw -I../cart_hw/svp
INCLUDES = -I. -I.. -I../z80 -I../m68k -I../dos -I../sound -I../sound/SRC -I../cart_hw -I../cart_hw/svp
LIBS = `sdl-config --libs` -lz -lm
OBJECTS = obj/z80.o
@ -88,7 +88,7 @@ obj/%.o : ../cart_hw/svp/%.c
obj/%.o : ../cart_hw/svp/%.c ../cart_hw/svp/%.h
$(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
obj/%.o : ../cpu/%.c ../cpu/%.h
obj/%.o : ../z80/%.c ../z80/%.h
$(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
obj/%.o : ../m68k/%.c ../m68k/%.h
@ -98,8 +98,8 @@ obj/%.o : ./%.c ./%.h
$(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
pack :
strip $(EXE)
upx -1 $(EXE)
strip $(NAME)
upx -9 $(NAME)
clean:
rm -f $(OBJECTS) $(NAME)

4
source/unused/win/config.c
View File

@ -17,8 +17,8 @@ void set_config_defaults(void)
config.boost = 1;
config.filter = 0;
config.hq_fm = 1;
config.fm_core = 0;
config.hq_fm = 0;
config.fm_core = 1;
/* system options */
config.freeze_auto = -1;

4
source/unused/win/error.c
View File

@ -1,3 +1,7 @@
/*
error.c --
Error logging
*/
#include "osd.h"

324
source/unused/win/main.c
View File

@ -7,33 +7,43 @@ int timer_count = 0;
int old_timer_count = 0;
int paused = 0;
int frame_count = 0;
int frameticker = 0;
int joynum = 0;
int update_input(void);
unsigned char *keystate;
unsigned char buf[0x24000];
uint8 log_error = 1;
uint8 log_error = 0;
uint8 debug_on = 0;
uint8 turbo_mode = 0;
Uint32 fps_callback(Uint32 interval)
{
if(paused) return 1000/60;
if(paused) return 1000/vdp_rate;
timer_count++;
if(timer_count % 60 == 0)
frameticker ++;
if(timer_count % vdp_rate == 0)
{
int fps = frame_count;
char caption[32];
sprintf(caption, "Genesis Plus/SDL FPS=%d", fps);
int fps = frame_count + 1;
char caption[100];
char region[10];
if (region_code == REGION_USA) sprintf(region,"USA");
else if (region_code == REGION_EUROPE) sprintf(region,"EUR");
else sprintf(region,"JAP");
sprintf(caption, "Genesis Plus/SDL - %s (%s) - %d fps (%d)", rominfo.international, region, fps, turbo_mode);
SDL_WM_SetCaption(caption, NULL);
frame_count = 0;
}
return 1000/60;
return 1000/vdp_rate;
}
int main (int argc, char **argv)
{
int running = 1;
int sym;
SDL_Rect viewport, src;
SDL_Surface *bmp, *screen;
@ -61,17 +71,9 @@ int main (int argc, char **argv)
exit(1);
}
/* load SRAM */
FILE *f = fopen("./game.srm", "rb");
if (f!=NULL)
{
fread(&sram.sram,0x10000,1, f);
fclose(f);
}
/* load BIOS */
memset(bios_rom, 0, sizeof(bios_rom));
f = fopen("./BIOS.bin", "rb");
FILE *f = fopen("./BIOS.bin", "rb");
if (f!=NULL)
{
fread(&bios_rom, 0x800,1,f);
@ -88,20 +90,30 @@ int main (int argc, char **argv)
else config.bios_enabled = 0;
/* initialize SDL */
viewport.x = 0;
viewport.y = 0;
viewport.w = 640;
viewport.h = 480;
src.x = 0;
src.y = 0;
src.w = viewport.w;
src.h = viewport.h;
if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) < 0)
{
exit(1);
}
SDL_WM_SetCaption("Genesis Plus/SDL", NULL);
screen = SDL_SetVideoMode(viewport.w, viewport.h, 16, SDL_HWSURFACE);
bmp = SDL_CreateRGBSurface(SDL_SWSURFACE, 1024, 512, 16, 0xF800, 0x07E0, 0x001F, 0x0000);
viewport.x = 0;
viewport.y = 0;
bmp = SDL_CreateRGBSurface(SDL_SWSURFACE, 360, 576, 16, 0xF800, 0x07E0, 0x001F, 0x0000);
/* initialize Genesis screen */
memset(&bitmap, 0, sizeof(t_bitmap));
bitmap.width = 1024;
bitmap.height = 512;
bitmap.width = 360;
bitmap.height = 576;
bitmap.depth = 16;
bitmap.granularity = 2;
bitmap.pitch = (bitmap.width * bitmap.granularity);
@ -117,19 +129,32 @@ int main (int argc, char **argv)
input.system[0] = SYSTEM_GAMEPAD;
input.system[1] = SYSTEM_GAMEPAD;
/* initialize emulation */
int buf_len = (44100 * 4) / vdp_rate;
snd.buffer[0] = malloc (buf_len/2);
snd.buffer[1] = malloc (buf_len/2);
memset (snd.buffer[0], 0, buf_len/2);
memset (snd.buffer[1], 0, buf_len/2);
/* initialize emulation */
system_init();
audio_init(44100);
int buf_len = (48000 * 4) / vdp_rate;
snd.buffer[0] = malloc (buf_len/2);
snd.buffer[1] = malloc (buf_len/2);
memset (snd.buffer[0], 0, buf_len/2);
memset (snd.buffer[1], 0, buf_len/2);
audio_init(48000);
/* load SRAM */
f = fopen("./game.srm", "rb");
if (f!=NULL)
{
fread(&sram.sram,0x10000,1, f);
fclose(f);
}
/* reset emulation */
system_reset();
/* emulation loop */
SDL_SetTimer(1000/60, fps_callback);
SDL_SetTimer(1000/vdp_rate, fps_callback);
SDL_ShowCursor(0);
int now, prev = SDL_GetTicks();
while(running)
{
while (SDL_PollEvent(&event))
@ -147,6 +172,75 @@ int main (int argc, char **argv)
}
break;
case SDL_KEYDOWN: /* user options */
sym = event.key.keysym.sym;
if(sym == SDLK_TAB) system_reset();
if(sym == SDLK_F5) log_error ^=1;
if(sym == SDLK_F6)
{
turbo_mode ^=1;
frameticker = 0;
}
else if(sym == SDLK_F7)
{
f = fopen("game.gpz","r+b");
if (f)
{
fread(&buf, 0x23000, 1, f);
state_load(buf);
fclose(f);
}
}
else if(sym == SDLK_F8)
{
f = fopen("game.gpz","w+b");
if (f)
{
state_save(buf);
fwrite(&buf, 0x23000, 1, f);
fclose(f);
}
}
else if(sym == SDLK_F9)
{
vdp_pal ^= 1;
/* reinitialize timings */
system_init ();
audio_init(48000);
fm_restore();
/* reinitialize HVC tables */
vctab = (vdp_pal) ? ((reg[1] & 8) ? vc_pal_240 : vc_pal_224) : vc_ntsc_224;
hctab = (reg[12] & 1) ? cycle2hc40 : cycle2hc32;
/* reinitialize overscan area */
bitmap.viewport.x = config.overscan ? ((reg[12] & 1) ? 16 : 12) : 0;
bitmap.viewport.y = config.overscan ? (((reg[1] & 8) ? 0 : 8) + (vdp_pal ? 24 : 0)) : 0;
bitmap.viewport.changed = 1;
}
else if(sym == SDLK_F10) set_softreset();
else if(sym == SDLK_F11)
{
joynum ++;
if (joynum > MAX_DEVICES - 1) joynum = 0;
while (input.dev[joynum] == NO_DEVICE)
{
joynum ++;
if (joynum > MAX_DEVICES - 1) joynum = 0;
}
}
else if(sym == SDLK_ESCAPE) running = 0;
else if(sym == SDLK_F12)
{
config.overscan ^= 1;
bitmap.viewport.x = config.overscan ? ((reg[12] & 1) ? 16 : 12) : 0;
bitmap.viewport.y = config.overscan ? (((reg[1] & 8) ? 0 : 8) + (vdp_pal ? 24 : 0)) : 0;
bitmap.viewport.changed = 1;
}
break;
default:
break;
}
@ -154,77 +248,131 @@ int main (int argc, char **argv)
if(!paused)
{
frame_count++;
if(!system_frame(0))
system_reset();
if(bitmap.viewport.changed)
if (frameticker > 1)
{
bitmap.viewport.changed = 0;
src.w = (bitmap.viewport.w + 2 * bitmap.viewport.x);
src.h = (bitmap.viewport.h + 2 * bitmap.viewport.y) << (interlaced ? 1:0);
viewport.w = src.w;
viewport.h = src.h;
viewport.x = (640 - viewport.w) / 2;
viewport.y = (480 - viewport.h) / 2;
//screen = SDL_SetVideoMode(bitmap.viewport.w, bitmap.viewport.h, 16, SDL_SWSURFACE);
SDL_BlitSurface(bmp, &src, screen, &viewport);
SDL_UpdateRect(screen, viewport.x, viewport.y, viewport.w, viewport.h);
/* Frame skipping */
frameticker--;
system_frame (1);
}
else
{
/* Delay */
while (!frameticker && !turbo_mode) SDL_Delay(1);
system_frame (0);
frame_count++;
}
frameticker--;
if(bitmap.viewport.changed)
{
bitmap.viewport.changed = 0;
src.w = (bitmap.viewport.w + 2 * bitmap.viewport.x);
src.h = (bitmap.viewport.w + 2*bitmap.viewport.x) << ((config.render && interlaced) ? 1:0);
viewport.w = bitmap.viewport.w + 2*bitmap.viewport.x;
viewport.h = bitmap.viewport.h + 2*bitmap.viewport.y;
viewport.x = (640 - viewport.w)/2;
viewport.y = ((480 - viewport.h)/2);
}
SDL_BlitSurface(bmp, &src, screen, &viewport);
//SDL_Flip(screen);
SDL_UpdateRect(screen, viewport.x, viewport.y, viewport.w, viewport.h);
}
}
}
system_shutdown();
SDL_Quit();
error_shutdown();
system_shutdown();
SDL_FreeSurface(bmp);
SDL_FreeSurface(screen);
SDL_Quit();
error_shutdown();
return 0;
}
/* Check if a key is pressed */
int check_key(int code)
{
static char lastbuf[0x100] = {0};
if((!keystate[code]) && (lastbuf[code] == 1))
lastbuf[code] = 0;
if((keystate[code]) && (lastbuf[code] == 0))
{
lastbuf[code] = 1;
return (1);
}
return (0);
return 0;
}
int update_input(void)
{
int running = 1;
keystate = SDL_GetKeyState(NULL);
memset(&input, 0, sizeof(t_input));
if(keystate[SDLK_UP]) input.pad[0] |= INPUT_UP;
else
if(keystate[SDLK_DOWN]) input.pad[0] |= INPUT_DOWN;
if(keystate[SDLK_LEFT]) input.pad[0] |= INPUT_LEFT;
else
if(keystate[SDLK_RIGHT]) input.pad[0] |= INPUT_RIGHT;
while (input.dev[joynum] == NO_DEVICE)
{
joynum ++;
if (joynum > MAX_DEVICES - 1) joynum = 0;
}
if(keystate[SDLK_a]) input.pad[0] |= INPUT_A;
if(keystate[SDLK_s]) input.pad[0] |= INPUT_B;
if(keystate[SDLK_d]) input.pad[0] |= INPUT_C;
if(keystate[SDLK_f]) input.pad[0] |= INPUT_START;
if(keystate[SDLK_z]) input.pad[0] |= INPUT_X;
if(keystate[SDLK_x]) input.pad[0] |= INPUT_Y;
if(keystate[SDLK_c]) input.pad[0] |= INPUT_Z;
if(keystate[SDLK_v]) input.pad[0] |= INPUT_MODE;
/* reset input */
input.pad[joynum] = 0;
/* keyboard */
if(keystate[SDLK_UP]) input.pad[joynum] |= INPUT_UP;
else
if(keystate[SDLK_DOWN]) input.pad[joynum] |= INPUT_DOWN;
if(keystate[SDLK_LEFT]) input.pad[joynum] |= INPUT_LEFT;
else
if(keystate[SDLK_RIGHT]) input.pad[joynum] |= INPUT_RIGHT;
if(keystate[SDLK_TAB]) system_reset();
if(keystate[SDLK_a]) input.pad[joynum] |= INPUT_A;
if(keystate[SDLK_s]) input.pad[joynum] |= INPUT_B;
if(keystate[SDLK_d]) input.pad[joynum] |= INPUT_C;
if(keystate[SDLK_f]) input.pad[joynum] |= INPUT_START;
if(keystate[SDLK_z]) input.pad[joynum] |= INPUT_X;
if(keystate[SDLK_x]) input.pad[joynum] |= INPUT_Y;
if(keystate[SDLK_c]) input.pad[joynum] |= INPUT_Z;
if(keystate[SDLK_v]) input.pad[joynum] |= INPUT_MODE;
if(keystate[SDLK_ESCAPE]) running = 0;
return (running);
extern uint8 pico_current;
if (input.dev[joynum] == DEVICE_LIGHTGUN)
{
/* get mouse (absolute values) */
int x,y;
int state = SDL_GetMouseState(&x,&y);
/* Calculate X Y axis values */
input.analog[joynum - 4][0] = (x * bitmap.viewport.w) / 640;
input.analog[joynum - 4][1] = (y * bitmap.viewport.h) / 480;
/* Map mouse buttons to player #1 inputs */
if(state & SDL_BUTTON_MMASK) input.pad[joynum] |= INPUT_C;
if(state & SDL_BUTTON_RMASK) input.pad[joynum] |= INPUT_B;
if(state & SDL_BUTTON_LMASK) input.pad[joynum] |= INPUT_A;
}
else if (input.dev[joynum] == DEVICE_MOUSE)
{
/* get mouse (relative values) */
int x,y;
int state = SDL_GetRelativeMouseState(&x,&y);
/* Sega Mouse range is -256;+256 */
input.analog[2][0] = x;
input.analog[2][1] = y;
/* Vertical movement is upsidedown */
if (!config.invert_mouse) input.analog[2][1] = 0 - input.analog[2][1];
/* Map mouse buttons to player #1 inputs */
if(state & SDL_BUTTON_MMASK) input.pad[joynum] |= INPUT_C;
if(state & SDL_BUTTON_RMASK) input.pad[joynum] |= INPUT_A;
if(state & SDL_BUTTON_LMASK) input.pad[joynum] |= INPUT_B;
}
else if (system_hw == SYSTEM_PICO)
{
/* get mouse (absolute values) */
int x,y;
int state = SDL_GetMouseState(&x,&y);
/* Calculate X Y axis values */
input.analog[0][0] = 0x3c + (x * (0x17c-0x03c+1)) / 640;
input.analog[0][1] = 0x1fc + (y * (0x2f7-0x1fc+1)) / 480;
/* Map mouse buttons to player #1 inputs */
if(state & SDL_BUTTON_MMASK) pico_current++;
if(state & SDL_BUTTON_RMASK) input.pad[joynum] |= INPUT_A;
if(state & SDL_BUTTON_LMASK) input.pad[joynum] |= INPUT_B;
}
/* options */
return (1);
}

1
source/unused/win/main.h
View File

@ -7,6 +7,7 @@
extern uint8 debug_on;
extern uint8 log_error;
extern int frame_count;
#endif /* _MAIN_H_ */

8
source/unused/win/readme-sdl.txt
View File

@ -1,3 +1,5 @@
To be compiled with MinGW.
You will also need to install SDL library
Zlib is required for zipped rom support.
Compile with MinGW.
You will also need to install the SDL library (http://www.libsdl.org/).
Zlib is required for zipped rom support.
Please distribute required dlls with the executable.

5
source/vdp.c
View File

@ -626,7 +626,9 @@ void vdp_data_w(unsigned int data)
return;
}
/* FIFO emulation */
/* update VDP FIFO (during HDISPLAY only) */
if (!(status&8) && (reg[1]&0x40))
{
fifo_update();
if (fifo_write_cnt == 0)
{
@ -647,6 +649,7 @@ void vdp_data_w(unsigned int data)
/* VDP latency (Chaos Engine, Soldiers of Fortune, Double Clutch) */
if (fifo_write_cnt > 4) count_m68k = fifo_lastwrite + fifo_latency;
}
}
/* write data */

0
source/cpu/cpuintrf.h → source/z80/cpuintrf.h
View File

0
source/cpu/osd_cpu.h → source/z80/osd_cpu.h
View File

0
source/cpu/z80.c → source/z80/z80.c
View File

0
source/cpu/z80.h → source/z80/z80.h
View File