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本帖最后由 mobile02 于 2014-10-26 20:35 编辑
可惜没有声音
On this page you will get the Source code for emulate a Sega Master System with my VGA expansion board.
The original work for the st429 Discovery board is from Alessandro Rocchegiani.
You can watch his video here :
STM32F429 Discovery Sega Master System Emulator
I want to thank Alessandro and his Son Fabrizio for all the help they provided for adapt this emulator on my library.
You will see the result here :
stm32f429 discovery board running Sega Master System Emulator in VGA screen
A big update to the Emulator today the : 2014 02 09:
First of all i finally found what have made the Emulator 2 x slower than the normal speed.
It was the Wii controller driver.
Because I2C need some delay between send/receive , at each screen we loose allot of time.
So i decided to remove the Wii from here and use now the TM1638 driver , SPI is so fast that you
don't see any breaking when you are playing.
Only bad thing is that i don't have joystick that work with SPI actually :)
Alessandro use buttons connected to free pins from the disco board , and i use the Spectrum
keyboard i just made for the other emulator to play with the SMS games , not really effective
but good for intensive testing.
Alessandro helped allot here for the use of the 4 x SMS screen resolution , don't forget that we
use 640 x 480 pixels here and it take lot's of time.
And now everything run smooth , i see that some games like R-Type have sometimes graphical bugs.
But for a beta version we have to agree that it run well :)
Now more information about the key used from the Spectrum keyboard.
At the starting menu you can choose the game you want run.
the key's are :
Up = 1
Down = Q
Select = Enter
In-game key to use :
UP = S
DOWN = Z
LEFT = Caps Shift
RIGHT = X
FIRE 1 = Symbol Shift
FIRE 2 = Break Space
For select another game use :
RESET
This will stop the actual game , open the Selector Menu , and let you choose the next game to play.
Now for use other SMS ROM Images don't forget to modify :
#define NUM_CARTRIDGE 6 <-- you need to put the exact number of Game ROM you put on the SD Card
Next is just to edit this variable ,
the 1st value (0x0F for example) is the number of 16k bank that the ROM contain.
0x00 (0) to 0x0F(15) = 16 (0 is included !!)
Then for the 0x0F Value the ROM is a 16 x 16k = 256k ROM
the next value :
"Sonic the Hedgehog '91" is what you will see on the Selector menu
Then come the :
"0:/sms/Sonic.sms" it's where you have put the ROM into the SD Card
Don't forget that we use the 8.3 format (8 Character for name and 3 Character for extension)
// Place the ROM into SDRAM 2 after the Display buffers
ROMS Cartridge[NUM_CARTRIDGE]={
// 0123456789012345678901
{0x0f,"Sonic the Hedgehog '91","0:/sms/Sonic.sms"},
{0x0f,"Castle of Illusion '90","0:/sms/Castle.sms"},
{0x0f," Psycho Fox '89 ","0:/sms/Psycho.sms"},
{0x1f," The Lion King '94 ","0:/sms/Lion.sms"},
{0x1f," R-Type ","0:/sms/RType.sms"},
{0x1f," D. Duck in Hollywood ","0:/sms/Daffy.sms"}
};
You have just to recompile and play your games ;)
News from 2014-02-25:
I improved the way i read the SDCard , before it was bytes per bytes , now i use a fixed address to SDRAM for not have to specify them in the Load function and
the File are read with 512 bytes block , it have improve the stability on reading and i doesn't get any read error up to now.
At bottom from the page , the latest source code.
Download
http://www.openedv.com/posts/downloadAttach/7889.htm
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阿莫论坛20周年了！感谢大家的支持与爱护！！
一只鸟敢站在脆弱的枝条上歇脚，它依仗的不是枝条不会断，而是自己有翅膀，会飞。
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发表于 2014-10-26 20:33:00
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