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Saturn to SD Card
vbt - Jul 27, 2015
  vbt Jul 27, 2015
just to mention cafe-alpha devblog this looks really promising.

  
	
	

		
		

			At that time, I connected a SD card to my second pad port on my ... and could read files successfully. However, file write sometimes failed ... I thought about many possible causes of failures (not enough 3.3V power supply ? Bad luck ? etc etc), but it was a software bug : writing sectors to SD card actually takes longer than reading sectors, and I didn't waited enough for my SD card to finish write.

Changing poll timeout count from 500 clocks to 50000 clocks seems to fix the problem. (Q&D fix, but if it works fine, I won't change it 
		
		
	


	)



So now, as SD card read/write access works on both yabause and real hardware, it is time to to use it in order to develop new features for my Saturn


http://ppcenter.webou.net/devblog/article/71/could...

 cafe-alpha Aug 5, 2015
Thank you for the announcement here !

However, it is not a high-spec super fast solution, because all SPI communication with SD card is done on SH-2 side. So transfer speed should be something like 50KB/s-ish (maybe, I didn't measured).

Special thanks to antime ! This SD card project is made from USB dev cart project sources

PS : it seems that latest PCB prototype (pre-release) is lost somewhere between PCB house and my home ... So I will use something else than DHL next time I order a PCB ...

 Red Ring Rico Aug 5, 2015
That's a shame about the PCB, cafe-alpha =(. Otherwise, it sounds like a great advancement in Saturn cartridge technology =D.

 cafe-alpha Aug 5, 2015

Red Ring Rico said:


Yeah, finally I re-ordered one batch, with super expensive UPS this time :/
I hope PCB house will be kind enough to re-send lost PCBs.

 vbt Sep 20, 2015
another big news :

  
	
	

		
		

			Additional testing of my test cartridge showed that Shining Force scenario 3 was "working" well when using memory expander hack 



By "working", I mean that game was working fine (no freeze, black screen whatever) while looking for save data on SD card.

I didn't verified if save data was consistent or not, this can be verified and eventually fixed later


more details : http://ppcenter.webou.net/devblog/article/78/shini...

 cafe-alpha Sep 21, 2015

vbt said:


It's still far from something OK for release however ^^;

BTW, PCB house re-sent lost PCB, so I received 2 batches (20 PCBs) : batch I re-oredered + re-manufactured batch.
So I'm relieved it seems to work, because the cardboard containing the non working carts, wasted carts, frankein-carts, etc is already full